Ambient Cured Coatings and Coated Rubber Products Trerefrom Field of Invention [0001] The present invention is directed to low viscosltyorganic solutions as ambient temperature curable coatings which are brushed,dipped or spray- applied to substrates such as rubbery elastomers, rigid metals or flexible-rigid thermoplastic substrates to provide enhanced appearance, resistance to solvents and fuels, and enhanced ozone resistance to the substrate. Such a coating is flexible and can be factory-applied on original equipment or provided as a an after-market coating or repair finish. Background of the Invention [0002] Fast reacting sealants which are moisture curable and contain plasticized rubbery polymers and reactive silanes, along with catalysts are known. See for example U.S. Pat. Nos 6,335,412, 5,051,463, 6,025,445, and 6,410,640. Such rheology, and plasticizer renders these compositions unsuitable as brushable, dippable and sprayable coatings, and plasticizer. As thin film coatings of 1-5 mils, plasticizer would be expected to interfere with adhesion and scuffing. Furthermore catalysts used in such sealants provide problems regarding pot life. [0003] Coatings In which the application is made by way of brushing, dipping and spraying require low viscosity solutions with sufficient pot life so that gelation does not occur once the coating composition is open to the atmosphere. Coatings that provide a curing speed whereby they are dry-to-the-touch in a few hours, but provide sufficient pot life would be useful Summary of the Invention [0004] The present invention provides an ambient temperature curable coating and coated articles therefrom in a rubbery, high elongation, weatherable coating composition which can be applied to flexible elastomeric substrates for a variety of purposes. Preferred film forming polymers used in the composition provide resistance to ozone, oils and solvents, and other embodiments may be applied for the purposes of enhancing the cosmetic appearance of the substrate rubber. The coating composition of the invention is resistant to long-term flex-fatigue and; provides for excellent adhesion to flexible elastomeric substrates and exhibits in the cured state at least 100% elongation as an unsupported film. [0005] The curable coating mixture is a mixture of two parts, one part containing a solution of a functionalized formingt polymer, and the other part providing the curing component coreactive with the functionalized polymer. The stability as a prernixed, one-part solution is limited to up to several months. The curable film former and curing component are mixed together at an overall 4% to 25% solids content. The viscosity can vary depending on the selected components and must be less than 20,000 cps (Brookfield) such that the coating can be sprayed, brushed or dipped to form thin coatings of from 0.001 - 0.020 mils. [0006] More specifically, the coating composition of the invention comprises a dilute, sprayable coating containing from 4 to 25% solids content in an organic solution, in the substantial absence (< 1000 ppm) of water and less than 1000 ppm of free isocyanate groups, and devoid of condensation catalyst where part (A) contains 100 parts of a functionalized hydrophobic, film former having a Tg of less than 0°C, (b) 25 to 150 parts a co-reactive silane curing component per 100 wt. parts of film former, and the remainder of at least one organic solvent for said film former. The silane chemically bonds to functional sites on the film forming polymer and cures to form siloxane bonds upon condensing of hydrolyzable groups upon exposure of the coated article to air. [0007] In another specific embodiment, metal-filled emissive elastomeric coatings, which are devoid of rubber accelerator, and curable without heat to exhibit durable, weatherable adhesion and long term heat dissipation when applied to flexible polymeric substrates, especially vulcanized rubber articles. [0008] The preferred coatings disclosed herein cure at ambient conditions and are resistance to solvents and fuels, and enhanced bzone resistance. The cured film forming polymer utilized has at least about 90% light transmissivity or transparency, contains no more than about 90% unsaturation in the cured state, and provides a matrix through which radiant heat reflective (emissive) and thermal transfer properties from the thermally conductive metal particulate filler can deflect and dissipate a significant amount of heat, while the coating adheres permanently and doe not undergo stress or environmental cracking or embrittlement. Such coatings are useful to coat molded rubber goods, such as pneumatic or non-neumatic wheels and tires, hoses, belts, mounts, and the like, especially where used near hot bodies, like engine blocks or other industrial components emitting radiant heat. Detailed Description of the Preferred Embodiments Functionalized Film Former and methods for Functionalizing [0009] By hydrophobic is meant that at least 80% of the film forming polymer is derived from water insoluble monomers. Film formers exclude the polyoxyalkylene copolymers. [0010] Functionalized elastomer film-formers used herein cure with the curing component by one or more reaction routes. Blends of two different functionalized film formers are suitable, each having the same of different type of functional groups on the polymer. For example, a blend of carboxylated hydrogenated nitrile butadiene and ethylene acrylic polymer will work. Salt forming reactions and condensation reactions can occur between the film forming polymer and curing component. The interaction between curing component and functional groups on the film forming polymer include electrophile -nucleophile interactions. Functional groups on the film former provide curing routes between the curing component and film forming polymer in addition to the curing of the polymer and curing component to itself and to the coating substrates. Functional groups on the film forming polymer can be provided, such as by copolymerization of a comonomer bearing a reactive group and in various methods to modify film forming polymers by incorporation of functional groups onto the polymer after polymerization. [0011] The term "functionalized" means (1) that an electrophile, nucieophile, especially an active hydrogen-bearing moiety is part of an ethylenic unsaturated comonomer that is copolymerized, or (2) an electrophile, nucleophile and especially an active hydrogen bearing compound is part of a graftlinking compound or ethylenic unsaturated comonomer, which is graft-linked to the film former base polymer, after- or post-polymerization, (3) a group which is reactive to an active hydrogen group as part of a comonomeror graftlinking compound and graft-linked to the film forming base polymer, post-polymerization. The comonomer or grafted compound becomes ionically and/or covalently bonded to the film forming polymer structure, and provides a pendant group capable of reacting with the curing component which is coreactive therewith at ambient temperatures. [0012] Conventional approaches for incorporation of an active hydrogen-bearing functional group or a co-reactive group therewith into a polymerized non- functional elastomer such as by converting a functional group-bearing compound into a suitable functional group precursor or the direct incorporation of a suitable precursor radical may be accomplished when the elastomer-is in solution or in . the molten state via the "Ene" reaction, whereby an allylic hydrogen transfer to an enophile followed by coupling between two unsaturated termini occurs, or via free-radical addition across a carbon-carbon double bond or in the molten state. When the polymer is in the molten state, however, means capable of imparting high mechanical shear, such as an extruder, will be used to effect the desired reaction to incorporate the functional group to be converted or to directly incorporate a suitable precursor radical. When the functional group to be converted to a suitable precursor or the precursor radical incorporated directly is incorporated via techniques such as metallation followed by reaction with a suitable electrophile, on the other hand, incorporation1 will, preferably, be accomplished with the polymer in solution. [0013] Of the several methods available for incorporation of a functional group or functional group precursor, those methods tending to incorporate a single function group or functional group precursor unit at each site of incorporation with minimal coupling of the elastomer polymer such as the ENE reaction and the method involving metallation followed by reaction with an electrophile are preferred. When a functional group to be converted to a suitable precursor is incorporated into the elastomer, conversion of the functional group to the precursor radical will also, generally, be accomplished with the polymer in solution. In general, any of the solvents known to be useful for preparing such elastomer polymers in solution may be used to effect these reactions or conversions. [0014] A variety of post-polymerization functionalization techniques are known which provide heretofore non-functional addition polymers with nucleophilic, or electrophilic crosslinking cure sites for use in the present invention. Hydroxyl groups are useful functional groups for effecting the crosslinking reactions with curing components used herein. U.S. Pat. No. 4,118,427 discloses hydroxyf- containing curable liquid hydrocarbon prepolymers by ozonizing a high molecular weight saturated hydrocarbon polymer such as polyisobutylene or ethylene- propylene rubber, followed by reducing the ozonized material; e.g., by using reducing agents such as diisobutyl aluminum hydride, to form the hydroxyl- containing polymer. [0015] A partial listing of nucleophilic and/or active hydrogen functional groups that can be incorporated on the film forming polymer that are coreactive with electrophilic group-substituted curing components or hydrolyzable groups are, hydroxy-, mercapto-, isocyanato-, amino-, phenolic-, and carboxyl- groups. Exemplary electrophilic groups incorporated on the film former and coreactive with nucleophilic group-substituted curing components are alkyl halide-, benzyl halide-, allyl halide-, ester-, ethers-, anhydride- groups, and the like. When the film forming polymer contains a pendant nucleophilic group, the corresponding group provided on at least one valency of the silicone atom of the silane curing component can also include an alkoxy-, hydroxy-, mercapto-, isocyanato-, amino-, phenolic-, glycido-, carboxyl-, oxirane-, benzyl halide-, allyl halide-, alkyl halide-, ester-, ethers-, and/or anhydride- group. (A) FUNCTIONALIZED COMONOMERS [0016] The curable film forming polymer employed herein can be formed by copolymerization of elastomer-forming monomers together with functionalized comonomers or by reaction of a polymer with a functional group containing monomer or reactive compound. The incorporated reactive group subsequently cures the polymer by reaction of the curing component as described herein. The curing method utilizes reactions of a crosslinking component with an active hydrogen-bearing functional group or active hydrogen reactive group which crosslinks with the corresponding reactive functional group on the copolymer or pendant on the copolymer. It is convenient to introduce a functional group bearing comonomer during polymerization of the film former polymer, as is conventionally practiced. The various approaches of free radical addition copolymerization, anionic addition polymerization, free-radical graftlinking, metathesis grafting, and hydrolytic grafting are known in the art. The functional group containing polymers, or copolymers include polymers characterized by their major constituents, such as a-olefin elastomers, diene elastomers, hydrogenated diene elastomers, fluoroelastomers, crosslinkable a-olefin copolymer elastomers, acrylatic rubber, acrylate or methacrylate acrylate copolymers, and ethylene-carboxylates, etc.. [0017] Preferred examples of rubbery copolymer elastomers include but are not limited to anionic polymerized olefinic elastomers. Examples of anionic polymerized olefinic rubbers include ethylene-propylene rubber, ethylene- propylene-diene monomer rubber, polyisobutylene, or "butyl rubber", or any other polymer of isoolefin optionally copolymerized with conjugated diene (such as isoprene), optionally containing up to 30 wt. % or an a,b-ethylenic unsaturated nitrile and/or styrenic comonomer (such as styrene and/or alkyl substituted styrene), and the like. Particularly preferred elastomers include isobutylene- isoprene copolymer, isobutylene-paramethylstyrene copolymer and the like. [0018] A suitable pendant active hydrogen functional group is provided by methods for forming amine-functionalized ethylene propylene diene monomer rubber (EPDM) by the process described in U.S. Pat. No. 4,987,200. Likewise higher molecular weight isobutylene copolymers functionalized with hydroxyl groups can be produced using the process described in EPA 325 997. Furthermore any commercially available halogenated isobutylene based polymer containing a low level of halogen typically 0.5 to 2.0 mole % can be combined with an alkylamine or an amino alcohol to produce the amine or the hydroxyl functional group respectively. [0019] Functionalized elastomers having an weight average molecular weight of 1000 up to 200,000 and containing hydroxyl and/or amine functional groups are known. Hydroxy terminated polyisobutylene are conventionally prepared by introducing hydroxy groups into the terminal positions of cationically polymerized isobutylene by dehydrochlorinating, hydroborating and oxidizing chloro-terminal polyisobutylene. Chloro terminated polyisobutylenes obtained by cationically polymerizing an isobutylene monomer are known. See Faust and Kennedy in, "Living Carbocationic Polymerization: III. Demonstration of the Living Polymerization of Isobutylene," Polym. Bull. 15:317-23 (1986), disclose living carbocationic polymerization of isobutylene and quenching the living recipe with methanol and other reagents such as amines. [0020] Living polymerization methods, some of which are described in U.S. Pat. Nos. 5,350,819; 5,169,914; and 4,910,321 are preferred techniques to form the film forming polymer. General conditions under which living polymerizations can be achieved, for example using isobutylene include: (1) an initiator such as a tertiary alkyl halide, tertiary alkyl ether, tertiary alkyl ester, or the like; (2) a Lewis acid co-initiator which typically comprises a halide of titanium, boron or aluminum; (3) a proton scavenger and/or electron donor; (4) a solvent whose dielectric constant is selected considering the choice of the Lewis acid and the monomer in accord with known cationic polymerization systems and monomer. Terminal Functional Film Forming Polymers. [0021] Electrophilc groups, nucleophilic groups, groups characterized by bearing an active hydrogen group or groups reactive with active hydrogen groups can be incorporated at the terminus of film former polymers which are useful herein. Terminal groups coreactive with active hydrogen groups on a curing component are useful. These film forming polymers are prepared by known methods. [0022] U.S. Pat. No. 5,448,100 discloses sulfonated telechelic polyisobtuylene prepared by the "inifer" (initiator-transfer agents) initiated carbocationic polymerization of isobutylene with Lewis acid to form polymer, followed by end- quenching with acetyl sulfate and precipitation by steam stripping or with methanol, ethanol, isopropyl alcohol, or acetone. The polymerization preferably occurs in a chlorinated solvent, most preferably in a mixture of solvents, such as methylene chloride, methyl chloride, or an aliphatic or alicyclic compound containing five to ten carbon atoms. The Lewis acid can be, for example, boron trichloride or titanium tetrachloride, or other metal halide (including tin tetrachloride, aluminum chloride, or an alkyl aluminum). End-quenching preferably occurs at a temperature between -90 ° to 0 °C, and most preferably at the polymerization temperature or at the decomposition temperature of the complex. The molar ratio of polyisobutylene to acetyl sulfate is preferably 1:1 or greater. [0023] Another example providing a film former polymer, such as polyisobutylene with terminal active hydrogen groups reactive with a curing component is a terminal silane group bearing a hydroxy or alkoxy group or other hydrolyzable group. These can be obtained by a known route of dehydrohalogenating a terminal tertiary carbon-chlorine g followed by an addition reaction with an ethylenic unsaturated silane, the reaction of a polymer having a terminal tertiary carbon-chlorine bond with allyltrimethylsilane to give a polyisobutylene having an unsaturated group terminally and subsequent addition reaction between the terminal unsaturated group and a hydrosilane compound by using a platinum catalyst. [0024] As the hydrosilane compound, there can be mentioned halogenated siianes such as trichlorosilane, methyldichlorosilane, dimethylchlorosilane, phenyldichlorosilane; alkoxysilanes such as trimethoxysilane, triethoxysilane, methyldiethoxysilane, methyldimethoxysilane, phenyldimethoxysilane, etc.; acyloxysilanes such as methyldiacetoxysilane, phenyldiacetoxysilane, etc.; and ketoximate siianes such as bis(dimethylketoximate)methylsilane, bis(cyclohexylketoximate) methylsilane, etc. Among these, halogenated siianes and alkoxysilanes are preferred. [0025] Such production processes are described, for example, in Japanese Kokoku Publication Hei-4-69659, Japanese Kokoku Publication Hei-7-108928, Japanese Kokai Publication Sho-63-254149, Japanese Kokai Publication Sho- 64-22904, and Japanese Patent Publication 2539445. (i) Diene Elastomers [0026] Functionalized hydrogenated diene copofymers suitable for use herein as the film forming polymer are solid phase, high polymers having a molecular weight of about 50,000 and higher, more typically 200,000 to 500,000, and contain no more than 10% conjugated diene segments by weight. These polymers are distinguished from liquid, functionalized oligomers, such as reactive terminal-group functional liquid polymers, e.g., ATBN and CTBN that are not suitable as the sole film former polymer herein but are blendable with a higher molecular weight film forming polymer (50,000 and higher). The unsaturated functionalized polymer for preparing the hydrogenated coating polymer comprises broadly, from 50 to 85 percent by weight of conjugated diene monomer units, 5 percent to 50 percent by weight one or more non-conjugated, ethylenically unsaturated monomer units, and 1 to 20 percent by weight of a functional comonomer or graft-linked compound bearing a reactive crosslinking site. The preferred conjugated diene monomer units are derived from 1,3- butadiene monomer, and the non-conjugated ethylenically unsaturated monomer units are derived from one or more ethylenically unsaturated monomers selected from unsaturated acrylic esters, methacrylic esters, nitrites such as acrylonitrile and methacrylonitrile, and monovinyl aromatic hydrocarbons such as styrene and alkylstyrenes, and vinylidene comonorners. Divinyl aromatic hydrocarbons such as divinyl benzene, dialkenyl aromatics such as diisopropenyl benzene are preferably absent. Other comonomers include alkyl (meth) acrylates such as methyl acrylate, methyl methacrylate, ethyl acrylate, butyl acrylate, 2-ethylhexyl acrylate or methacrylate, vinyipyridine, and vinyl esters such as vinyl acetate. The preferred functional comonomers are selected from unsaturated carboxyiic acids and esters thereof such as acrylic acid, methacryiic acid, crotonic acid, itaconic acid, and maleic acid. The preferred glass transition temperature of functionalized diene elastomer film formers must not exceed 0°C , and preferably is less than -25°C in order to provide flex-cracking/ flex-fatigue resistance in the coating. A preferred emulsion polymer latex comprises [0027] Carboxyl end groups can be formed on diene elastomer high polymers containing -C-CH=CH-C- type unsaturation by a chain scission methods in which a rubber ozonide is formed, and aldehyde end groups are oxidized to carboxyl groups using peroxide or peracid. Alternatively hydroxyl end groups on the rubber ozonide can be formed by reductive techniques by catalytic hydrogenation or by reducing agents like metal hydrides or borohydrides, and the like. See for example British Patent No. 884,448. Likewise, U. S. Pat. No. 4,118,427 discloses liquid hydroxyl-containing curable liquid hydrocarbon prepolymers by ozonizing a high molecular weight saturated hydrocarbon polymer such as polyisobutylene or ethylene-propylene rubber, followed by reducing the ozonized material; e.g., by using reducing agents, preferably diisobutyl aluminum hydride, to form the above-noted hydroxyl-containing liquid prepolymers having a substantially lower molecular weight than the parent polymer. [0028] Incorporation of mercapto alcohol, or marcaptocarboxylates as functionalized grafting compounds is readily adaptable for use in the present invention. Suitable hydroxymercaptans and/or mercaptocarboxylic acid esters containing hydroxyl. HS-R-OH compounds include those where R is a linear, branched or cyclic C1-C36 alkyl group which can optionally be substituted by up to 6 further hydroxyl groups or can be interrupted by nitrogen, oxygen or sulfur atoms. Mercaptocaboxylates such as HS-{CHR2}n-(C(O)OR3OH)m wherein R2 is hydrogen or a C1 -C6 alkyl group, R3 is a linear, branched or cyclic C2 -C36 alkyl group which can optionally be substituted by up to 6 further hydroxyl groups or can be interrupted by nitrogen, oxygen or sulfur atoms, preferably -OH is primary, n is an integer from 1 to 5 and m is an integer from 1 to 2 are suitable. [0029] Preferred hydroxymercaptans are mercaptoethanol, 1-mercapto-3- propanol, 1-mercapto-4-butanol, a-mercapto-a-hydroxyoligoethylene oxides, e.g., a-mercapto-w-hydroxyoctaethylene glycol, or the corresponding ethyfene oxide/propylene oxide copolyethers. Mercapto-ethanol and a-mercapto-w- hydroxyoligoethylene oxides are preferred. Preferred mercaptocarboxylic acid esters containing hydroxyl groups are esters of mercaptoacetic acid, mercaptopropionic acid and mercaptobutyric acid with ethylene glycol, propylene glycol, butylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol, octaethylene glycol, dipropylene glycol, tripropylene glycol, tetrapropylene glycol and N-methyldiethanolamine. The corresponding esters of mercaptoacetic acid and 3-mercaptopropionic acid are particularly preferred. Suitable types of elastomer film former base polymers reacted with the mercapto compound include polymers of isobutylene, chloroprene, polybutadiene, isobutylene/isoprene, butadiene/acrylonitrile, butadiene-acrylate copolymers, S- B copolymers, butadiene-vinylidene chloride-acrylate type copolymers. Methods for incorporation of mercapto compounds are described in U. S. Patent 6,252,008 to make a functional film former polymer. The rubber contains in the region of 0.1 to 5 wt.% of bonded hydroxyl groups. The molecular weight of the solution polymerized diene rubber containing hydroxyl groups incorporated according to the method of U.S. 6,252,008 should lie in a range that dilute solutions of 5 to15% solids can be obtained and be sprayable, brushable or dippable, such as from 10,000 to 200,000 Mn (gel permeation chromatogragphy). [0030] There are other known approaches for incorporating OH groups into the suitable film forming polymers used herein, such as by addition reactions with formaldehyde, reaction with carbon monoxide followed by hydrogenation, and hydroboration followed by hydrolysis and copolymerization using silanes containing an ethylehic unsaturated group. Representative silane comonomers include vinylsilane or allyisilane having a reactive silicon group, of which there may be mentioned vinyltrichlorosilane, vinylmethyldichlorosilane, vinyldimethylchlorosiiane, vinyldimethylmethoxysilane, divinyldichlorosilane, divinyldimethoxysilane, allyltrichlorosilane, allylmethyldichlorosilane, allyldimethylchlorosilane, allyldimethylmethoxysilane, diallyldichlorosilane, diallyldimethoxysilane, Y-methacryloyloxypropyltrimethoxysilane, and y- methacryloyloxypropylmethyldimethoxysilane. [0031 ] The functionalized diene elastomer will be described as follows with respect to the most preferred embodiment for organic solvent-based coating embodiments of the present invention as a functionalized butadiene acrylonitrile copolymer but applies equally to preparation of the myriad other suitable functionalized diene copolymers in light of the teachings herein. Nitrile elastomers offer beneficial characteristics such as low temperature flexibility, oil, fuel and solvent resistance as well as good abrasion and water-resistant qualities, making them suitable for use in a wide variety of coating applications in accordance with the invention. [0032] The present invention is most preferredly carried out with a functionalized hydrogenated nitrile rubber. The functionalization of HNBR with reactive functionality provides critical enabling methods for crossiinking the coating composition and obtaining the essential level of adhesion to the elastomer substrates. Without adequate adhesion to the elastomer substrate, coatings exhibit premature flex-cracking and/or delamination . The functional groups for HNBR can be generally classified as containing active hydrogen groups, ethylenic unsaturated groups or hydrolyzable groups. Crossiinking can be effected through the addition of crossiinking components mentioned herein, by exposure to moisture, heat (infra-red, thermal), by UV radiation, or by e-beam radiation. Depending on the reactive functionality incorporated into the diene copolymer. Some functionalized HNBR embodiments mentioned herein below are self-curing without added crosslinker, and all can be are cured with suitable crosslinking components added to the functionalized HNBR such as but not limited to dinitrosobenzene, ZnO, gamma-POM, resoles, multifunctional amine, isocyanates, acrylates, dicyandiamide , dicarboximides, and formaldehyde (or UF, MF) resins. [0033] As another example, a functionalized HNBR can be prepared by a variety of ways known in the art. Functional groups can be incorporated by the use of functional-group-containing comonomers, or by the use of graft-linkable, functional-group-bearing compounds, and by functionalization of NBR using metathesis, followed by hydrogenation of the modified NBR to give functionalized HBNR or reaction of NBR with methylolated phenols followed by hydrogenation of the modified NBR to give functionalized HBNR. [0034] Functionalized HNBR containing active-hydrogen bearing functional groups are preferred crosslinkable film formers in the curable emissive coating composition. The presence of unsaturated groups (i.e., vinyl and disubstituted olefins, nitriles) in the NBR provides reactive sites in which reactive functionality may be attached and used for further crosslinking, post-polymer functionalization, and grafting reactions. These reactive sites can be modified through either catalytic or non-catalytic chemistries. Such modification can introduce any number of active-hydrogen functional groups such as epoxides by epoxidation of olefinic sites. Epoxides are readily converted to other functional groups through ring-opening reactions. For example, glycols are produced by ring-opening with base, glycol ethers with alkoxides or phenoxides, alcohols with carbanions or hydrides. In addition, epoxides serve as crosslinkable sites using chemistry available to one skilled in the art. Many other functional groups may be introduced by reaction of the backbone olefins: hydrofomnylation (aldhehydes, alcohols, carboxylic acids), hydrocarboxylation (carboxylic acids), hydroesterification (esters), hydrosilylation (silanes), hydroamination (amines), halogenation (halogens), chlorosulfonylation (chlorine, sulfonic acids), hydroboration (boranes, alcohols, amines). Examples of such transformations have been reviewed by Tremont (McGrath, M.P.; Sail, E.D.; Tremont, S.J. "Functionalization of Polymers by Metal-Mediated Processes," Chem. Rev. 1995, 95, 381). The nitrile group of NBR elastomers also can be converted to an amide by reaction with alcohols in an acid catalyzed process and to carboxylic acids through hydrolysis. [0035] Crosslinking can be effected through the addition of a crosslinking component, moisture, thermal, UV radiation, or e-beam radiation. Depending on the reactive functionality attached to HNBR and its intended use, suitable crosslinking components can be added to the functionalized HNBR such as dinitrosobenzene, ZnO, gamma-POM, resoles, multifunctional amine, isocyanates, acrylates, and dicyandiamide. Particularly preferred crosslinking components are those components known in the art for obtaining good bonds to elastomeric articles. These components include DNB, ZnO, and QDO and can be added to enhance the adhesion of the functionalized HNBR to a wide variety of elastomeric materials. [0036] The reactive functionality incorporated onto the diene elastomer, includes, as non-limiting examples, phenolic OH, aliphatic OH, amine, isocyanate, epoxy, acrylate, silyl ethers, siiyl chlorides, anhydrides, maleimides, and Diels-Alder dieneophiles among the aforementioned functional groups. [0037] The appropriate curing components and aids for the curing reactions are well-known in the prior literature and patents in the adhesive and coating area for curing the R.F. of this invention. For example, when the functional group on the polymer is phenol, then isocyanate, dicarboximide, formaldehyde source, and resoles are suitable curing components that are useful for crosslinking the phenol-functionalized HNBR. Likewise, amine functionalized HNBR can be crosslinked using isocyanate or dicarboximide, formaldehyde source, and resoles, as examples. Epoxy functionalized HNBR can be crosslinked and cured with appropriate amines and dicyandiamide components, as is known in the art of Epoxy adhesive and coatings. Isocyanate functionalized HNBR is of particular interest because it can be crosslinked or cured by moisture or by the addition of other curative agents such as amine or polyols. Incorporation of the isocyanate as part of the HNBR is particularly desirable because it reduces that amount of free monomeric and therefore volatile isocyanate and its reported health and safety issues. A latent isocyanate functionalized HNBR can be prepared by reaction of an amine functionalized HNBR (or NBR) with a diary! carbonate to give a urethane functionalized HNBR (or NBR). Thermal cracking of the urethane forms the isocyanate functionalized HNBR (or NBR) (For example, see: Kothandaraman, K.; Nasar, A.S. "The Thermal Dissociation of Phenol - Blocked Toluene Diisocyanate Crosslinkers", J.M.S. - Pure Applied Chem. 1995, A32, 1009; Wicks, D.A.; Wicks, Z.W. "Blocked Isocyanates III: Part A. Mechanisms and Chemistry", Progress in Organic Coatings 1999, 36, 148; Mohanty, S.; Krishnamurti, N. "Synthesis and Thermal Deblocking of Blocked Diisocyanate Adducts," Eur. Poiym. J. 1998, 34, 77). Anhydride functionality on the film forming polymer can link to amine functional curing components. Silyl ether and chlorosilanes can be utilized in other embodiments to crosslink the film forming polymer. [0038] Exemplary details of the aforementioned graft methods for incorporating functional groups on a film forming elastomer is the melt processing of molten film forming elastomer with a polyfunctional graftlinkable material such as polyfunctional acrylate, maleated polybutadiene, and metal salts of difunctional acrylates. For example an olefin elastomer such as EPDM can be masticated on a two roll mill, with 5 parts of an acid scavenger such as zinc oxide, 1 part stearic acid, an antioxidant and a peroxide followed by addition of 5 to 10 parts of a multi-ethylenic unsaturated compound such as trimethylo propane triacrylate, maleated liquid polybutadiene, or zinc diacrylate to the flux roll. [0039] Functionalized HNBR can be prepared by the aforementioned metathesis, followed by hydrogenation of the modified NBR to give functionalized HNBR and (2) the reaction of NBR with methylolated phenols followed by hydrogenation of the modified NBR to give functionalized HNBR. [0040] A novel method for incorporating a reactive pendant functional group, such as a carboxy, anhydride, hydroxy functionality is provided on a NBR elastomer as follows: [0041] Direct functionalization of any suitable unsaturated film former polymer usable herein, and especially NBR, and is accomplished through the use of olefin metathesis chemistry. Here, the olefin C=C double bonds are reacted with a catalyst and a monomer. The olefin metathesis catalyst must be capable of catalyzing metathesis reactions in the presence of nitrile functional groups. The monomer can be any cycloolefin, olefin, or a,a)-diene that is capable of undergoing an olefin metathesis reaction .(e.g., ring-opening metathesis polymerization [ROMP], cross-metathesis, ring-opening-cross-metathesis, and acyclic diene metathesis polymerization [ADMET]). These monomers are derivatized with groups bearing functionality (e.g., carboxyiic acids, amides, esters, anhydrides, epoxy, isocyanate, silyl, halogens, Diels-Alder diene and dienophiles, etc.) to provide cure sites for secondary crosslinking reactions of the cured film or to give new properties to the polymer. Kinetically, the metathesis catalyst will likely attack the vinyl C=C bonds first, however, their low levels in the HNBR copolymer may make attack at the backbone C=C double bond competitive. Such attack on the backbone unsaturation will likely cause a drop in molecular weight of the NBR, but the extent of such a process can be minimized by using high NBR-to-catalyst levels. After reduction of the modified NBR using for example the aforementioned catalytic hydrogenation methods, a reactive modified HNBR polymer is obtained. The polymer can be crosslinked using moisture, a selected curing agent, or an external energy source (UV or e-beam). One particular preferred advantage of metathesis catalysis is that it provides a unique means of introducing reactive functionality into NBR under mild conditions in water or in solvent. So even NBR latex can be modified with reactive functionality without de-stabilizing the latex thrbugh metathesis catalyst. This feature allows the functionalization of a variety of commercially well known NBR polymers, in solution or as aqueous dispersions, and latexes (water-based polymerizate), followed by hydrogenation to yield functionalized HNBR. Hydrogenated Protic Group terminated Diene polymers. [0042] Hydrogenated hydroxy or carboxy terminated diene polymers, alone, or in blends with high molecular weight (10,000 Mn and above) film forming polymers are also suitable as a curable film former used in the emissive coating of the present invention. Substantially saturated polyhydroxylated polydiene polymers are known and commercially available. These represent anionic polymerized conjugated diene hydrocarbons, such as butadiene or isoprene, with lithium initiators, and terminated with OH groups. The process steps are known as described in U.S. Pat. Nos. 4,039,593; Re. 27,145; and 5,376,745 for preparing polyhydroxylated polydiene polymers. Such polymers have been made with di- lithium initiator, such as the compound formed by reaction of two moles of sec- butyllithium with one mole of diisopropylbenzene. Such a polymerization of butadiene has been performed in a solvent composed of 90% by weight cyclohexane and 10% by weight diethylether. The molar ratio of di-initiator to monomer determines the molecular weight of the polymer. The polymer is capped with two moles of ethylene oxide and terminated with two moles of methanol to produce the dihydroxy polybutadiene. The hydroxylated polydiene polymer is hydrogenated where substantially all of the carbon to carbon double bonds become saturated. Hydrogenation has been performed by those skilled in the art by established processes including hydrogenation in the presence of such catalysts as Raney Nickel, noble metals such as platinum and the like, soluble transition metal catalysts and titanium catalysts as in U.S. Pat. No. 5,039,755. Suitable polyhydroxylated polydienes are those available from Shell Chemical Company in the U.S.A. under the trade designation of KRATON LIQUID® POLYMERS, HPVM 2200 series products, and from ATOCHEMIE under the PolyBD® mark. The high molecular weight polymers suitable in blends with the hydrogenated hydroxyl butadiene polymers are not limited, and include for example the aforementioned carboxy modified chlorinated polyethylene, chlorinated polyethylene, polymers of epichlorohydrin, ethylene-acrylic copolymers, SBR, SBS, nitrile rubber (NBR), SIBS, EPDM, EPM, polyacrylates, halogenated polyisobutylene, and polypropylene oxide, among others mentioned herein, and known. The weight proportion of liquid hydrogenated polybutadiene polyol to high molecular weight film former is limited such that the percent of unsaturation in the combination is less than 20%, preferably less than 10% overall. Therefore, where mixtures of the hydrogenated polydiene polyol are made with unsaturated high polymers (Mn > 50,000) such as SBR, NBR, and the like, the proportion of unsaturated polymer will be limited to maintain the overall degree of saturation of at least 80%, preferably at least 90%. Modified chlorinated polyolefins can include those modified with an acid or anhydride group. Some examples of modified chlorinated polyolefins are described in U.S. Pat. Nos. 4,997,882 (column 1, line 26 to column 4, line 63); 5,319,032 (column 1, line 53 to column 2, line 68); and 5,397,602 (column 1, line 53 to column 2, line 68). The chlorinated polyolefins preferably have a chlorine content of from about 10 to 40 weight percent, more preferably from about 10 to 30 weight percent based on the weight of starting polyolefin. One suitable example of a modified chlorinated polyolefin is the modified chlorinated polyolefin that has a chlorine content of from about 10 to about 30 weight percent based on the weight of polyolefin, which is not neutralized with an amine, and has an acid value in the range of about 50 to about 100. Hydrogenated Block Copolvmers {0043] Suitable film formers adaptable according the invention are hydrogenated styrene-butadiene-styrene block copolymers, hydrogenated styrene-isoprene- styrene block copolymers, which are modified according to methods disclosed herein above, adapted for chlorinated polyethylene, and elsewhere provide cure functionality on the block copolymer for interaction with the curing agent. Some elastomeric block copolymers containing carboxyl groups are available commercially. Those block copolymers which contain more than 20% unsaturation can be hydrogenated according to known hydrogenated methods, including methods referenced herein. Phenol Functional Elastomer [0044] Functionalization of HNBR with phenol functionality can be carried out by the combination of a methylolated phenol and the NBR, followed by hydrogenation of the phenol-modified NBR intermediate. Methylolated phenols can form covalent bonds with NBR and NBR copolymers by a variety of chemical reactions as reported in the literature [A. Knop and L. Pilato, "Phenolic Resins Chemistry and Applications and Performance1' Springer-Verlag, New York 1985, Chapter 19 pg 288-297]. [0045] Various known isocyanate-reactive functional groups can be incorporated in a functionalized elastomer film forming polymer. The aforementioned carboxy-functional, hydroxy-functionai and amine functional elastomers are most readily adaptable. Functional comonomers, like carboxy- functional comonomers are readily adaptable to form a copolymer of carboxylated hydrogenated nitrile rubber. For the purposes of the present invention, the functionalized hydrogenated nitrile rubber can be defined as a polymer comprising at least one diene monomer, nitrile monomer, and a functional group-bearing compound such as a comonomer or a graftlinking compound containing a functional group or a combination thereof. When the abbreviation HNBR is utilized herein, it is to be understood that the term refers to rubbers which can include diene monomer other than 1,3 butadiene, and comonomers other than acrylonitrile, unless specifically stated. It is also important to note that additional monomers can be polymerized along with or grafted to the diene monomer to form the functionalized HNBR. The additional monomers can, for example, provide at least one functional group to facilitate crosslinking. [0046] Functionalization of HNBR with phenolic functionality can be carried out with the unsaturated un-hydrogenated polymer, or a partially hydrogenated XHNBR polymer (80-97% hydrogenation level) by addition of methylol phenol or ether derivative under heat and optionally catalyzed by suitable Lewis acid . Preferably an ether blocking group is provided on the methylol phenol compound, facilitating ease of post reaction hydrogenation. Addition can be through the nitriie or carboxyl groups by ester formation, or by way of the aforementioned addition at allylic sites. Preferably a metathesis reaction of an ethylenic unsaturated compound bearing a phenol group can be done in solvent or water. Alternatively, an olefinic bearing methylolated phenyl ether or phenol can be metathesized with NBR, followed by hydrogenation. The phenol functionalized NBR is subsequently hydrogenated. A methylolation reaction can be undertaken using a phenol functional NBR or HNBR with formaldehyde to generate a methylolated phenol functionality in the NBR, or with HNBR. Methylolated phenols can form covalent bonds with NBR and NBR copolymers by a variety of chemical reactions as reported in the literature. See, A. Knop and L. Pilato, "Phenolic Resins Chemistry and Applications and Performance" Springer-Verlag, New York 1985, Chapter 19 pg 288-297. The following structural diagrams illustrate functionalizing with a representative phenolic bearing compound. [0047] While it is possible to combine any methylolated phenol with NBR, mono- methylolated phenols are especially preferred. The combination of Mono- methylolated phenols with NBR polymers yields phenol functionalized-NBR products which are stable. After hydrogenation of the phenol-modified NBR according to known procedures in the art (e.g. cat. hydrogenation), a stable phenol-modified HNBR copolymer is obtained. The pherrol-functionalized HNBR copolymer can be crosslinked with a variety of well-known crosslinkers for phenolic resins including those selected from the class of chemical compounds dicarboximides, isocyanate, and formaldehyde source (paraformaldehyde, gamma-POM, hexamethyiene amine, phenolic resoles or etherified phenols). [0048] Phenol functionalized HNBR firstly to prepare a phenol functional polymer via a phenol monomer with methylolated phenol functionalized BNR/HBNR can be prepared by known procedures in the art. The phenol functionalized NBR/HNBR can be prepared by either the mono-methylolated phenol or by metathesis involving unsaturated monomer with the unsaturated NBR. The methylolated phenol functionalized NBR/HBNR prepared by metathesis utilizes a methylolated phenolic monomer with NBR. These materials are useful not only as coatings in accordance with the present invention, but also as components of elastomer-to-metal adhesives, autodepositing materials, RFL dips, and reactive tougheners (e.g. epoxy adhesives) taking advantage of their unique curing, film-forming, metal adhesion and compatibility properties. Methylolated phenol functionalized NBR/HNBR are capable of self-curing (i.e. without an external curing agent). Methylolated phenol functionalized NBR/HNBRderivatives are capable of curing with other coating components, such as phenolic novolaks, active hydrogen reactive or active hydrogen containing crosslinkers and rubber/elastomer toughening agents. Methylolated phenol functional HNBR can be used with known vulcanizing agents for rubber. The vulcanization reaction is based on the formation of either a quinone methide or a benzylic carbenium that is generated by the thermal or catalytic activation of the methylolated phenols. The quinone methide intermediate reacts by abstraction of allylic hydrogen. Alternatively, methylolated phenols under acidic catalyzed conditions can generate reactive benzyl carbenium ions which will react with unsaturated polymers in the substrate. [0049] Isocyanate functionalized HNBR can be crosslinked or cured by moisture and on contact with carboxy, amine or polyol functional silanes. Incorporation of the isocyanate as part of the HNBR is particularly desirable because it reduces that amount of free monomeric isocyanate groups and therefore volatile isocyanate and its reported health and safety issues. Maleimide functionalized HNBR can be crosslinked either by the Michael addition reactions with suitable curing nucleophiiic groups on the silane curing agent. Ethyienic unsaturated acrylate-functionalized HNBR is capable of both free radical, UV and e-beam curing. Anhydride functional HNBR can be cured using amines and components described in the artsuch as epoxy functional silanes. Silyl ethers and chlorides are moisture curing. [0050] To provide the ethylenically unsaturated nitrile-conjugated diene rubber with high saturation, the nitrile rubber is hydrogenated by conventional means. Generally any of the numerous known processes for hydrogenation can be utilized, including but not limited to, solution hydrogenation and oxidation/reduction hydrogenation. The hydrogenation serves to saturate at least 80% of the unsaturated bonds of the rubber. When the degree of saturation is less than 80%, the rubber's heat resistance is low, The more preferred degree of saturation of the rubber is 95-99.99%. [0051] The preferred conjugated diene monomers useful for preparing the carboxylated acrylonitrile-butadiene copolymers which are further hydrogenated can be any of the well-known conjugated dienes including dienes having from about 4 to about 10 carbon atoms, such as, but not limited to, 1,3-butadiene; 2- methyl-1,3-butadiene, 2,3-dimethyl- 1,3-butadiene; 1,3-pentadiene; 1,3- hexadiene; 2,4-hexadiene; 1,3-heptadiene; piperylene; and isoprene, with 1,3- butadiene presently being preferred. [0052] The unsaturated nitrile monomers copolymerized to form a carboxylated acrylonitrile-diene copolymer typically correspond to the following formula: wherein each A is hydrogen or a hydrocarbyl group haying from 1 to about 10 carbon atoms. Examples of A groups include alky! and cycloalkyl, such as methyl, ethyl, isopropyl, t-butyl, octyl, decyl, cyclopentyl, cyclohexyl, etc., and aryls such as phenyl, tolyl, xylyl, ethylphenyl, t-butylphenyl, etc. Acrylonitrile and methacrylonitrile are the presently preferred unsaturated nitriles. [0053] The HNBR of the present invention also includes functional group containing monomers which are polymerized into the backbone of the HNBR, or functional group containing compounds which have been grafted to the HNBR, or a combination thereof. [0054] Carboxyl group containing monomers are optionally utilized in the rubbers of the present invention. Carboxyl groups are derived from cc,|3- unsaturated monocarboxylic acid monomers with 3 to about 5 C-.atoms such as acrylic acid, methacrylic acid and crotonic acid and/or other known carboxyl group-containing monomers such as, but not limited to a,p-unsaturated dicarboxylic acids with 4 to about 5 or about 6 C-atoms, e.g., maleic acid, fumaric acid, citraconrc acid and itaconic acid. The bound unsaturated carboxylic acid may be present in an amount of from about 1 to about 10 weight percent of the copolymer, with this amount displacing a corresponding amount of the conjugated diolefin. Preferably, the monomer is an unsaturated mono- or di- carboxylic acid derivative (e.g., esters, amides and the like). Functions of the carboxyl group containing monomers include serving as a crosslinking site and enhancing adhesion. [0055] Additional, functionalized comonomers can be polymerized into the backbone of the HNBR copolymer. Examples of the functional ethylenically unsaturated monomers which are copolymerizable with the nitrile monomers and the conjugated diene monomers are: hydrazidyl-group containing ethylenic unsaturated monomers, amino-group-bearing ethylenic unsaturated monomers, thiol-group bearing unsaturated ethylenic unsaturated monomers, unsaturated carboxylic acids such as acrylic acid, methacrylic acid, itaconic acid and maleic acid and salts thereof, alkyl esters of unsaturated carboxylic acids such as various acrylates, for example methyl acrylate and butyl acrylate; alkoxyalkyl esters of unsaturated carboxylic acids such as methoxy acrylate, ethoxyethyl acrylate, methoxyethyl acrylate, acrylamide, and methacrylamide, chlorodimethylvinylsilane, trimethylsilylacetylene, 5-trimethylsilyl-1,3- cyclopentadiene, 3-trimethylsilylallyl alcohol, trimethylsilyl methacrylate, 1- trimethylsilyloxy-1,3-butadiene, 1-trimethylsilyloxycyclopentene, 2- trimethylsilyloxyethyl methacrylate, 2-trimethylsilyloxyfuran, 2- trimethylsilyloxypropene, allyloxy-t-butyldimethylsilane and allyloxytrimethylsilane.. [0056] Also suitable as functional comonomers are various classes of monomers such as N,N-disubstituted-aminoaIkyl acrylates; N,N-disubstituted- aminoalkyl methacrylates; N,N-disubstituted-arninoalkyl acrylamides; N,N- disubstituted-aminoalkyl methacrylamides; hydroxyl-substituted-alkyl acrylates and hydroxyl-substituted-alkyl methacrylates, N-alkylol substituted acryiamides such as N-methylolacrylamide, N,N'-dimethylolacrylamide and N- ethoxymethylolacrylamide; N-substituted methacrylamides such as N- methylolmethacrylamide, N,N'-dimethylolmethacrylamide and N- ethoxymethylmethacrylamide especially where free radical initiated copolymerization occurs in the presence of an alkylthiol compound having 12 to 16 carbon atoms three tertiary carbon atoms. [0057] Of these polar group-containing vinyl monomers, N,N-disubstituted- aminoalkyl acrylates, N,N-disubstituted-aminoalkyl methacrylates, N,N- disubstituted-aminoalkyl acrylamides and N,N-disubstituted-aminoalkyl methacryiamides are preferable. [0058] As specific examples of N,N-disubstituted-aminoalkyl acrylates, there can be mentioned acrylic acid esters such as N,N-dimethylaminomethyl acrylate, N,N-dimethylaminoethyl acrylate, N,N-dimethylaninopropyl acrylate, N,N- dimethylaminobutyl acrylate, N,N-diethylaminoethy! acrylate, ISf.N- diethylaminopropyl acrylate, N,N-diethylaminobutyl acrylate, N-methyl-N- ethylaminoethyl acrylate, N,N-dipropylamlnoethyi acrylate, N,N-dibutylaminoethyl acrylate, N,N-dibutylaminopropyl acrylate, N,N-dibutylaminobutyl acrylate, N,N- dihexylaminoethyl acrylate, N,N-dioctylaminoethyl acrylate and acryloyl morpholine. Of these, N,N-dimethylaminoethyl acrylate, N,N-diethyluninoethyI acrylate, N,N-dipropylaminoethyl acrylate, N,N-dioctylaminoethyl acrylate and N- methyl-N-ethylaminoethyl acrylate are preferable. « [0059] As specific examples of N,N-disubstftuted-aminoalkyl methacrylates, there can be mentioned methacrylic acid esters such as N,N- dimethylaminomethyl methacrylate N,N-dimethylaminoethyl methacrylate, N,N- dimethylaminopropyl methacrylate, N,N-dimethylaminobutyl methacrylate, N,N- diethylaminoethyl methacrylate, N,N-diethylaminopropyl methacrylate, N,N- diethylaminobutyl methacrylate, N-methyl-N-ethylaminoethyl methacrylate, N,N- dipropylaminoethyl methacrylate. N,N-dibutylaminoethyl methacrylate, N,N- dibutylaminopropyl methacrylate, N,N-dibutylaminobutyl methacrylate, N,N- dihexylaminoethyl methacrylate and N,N-dioctylaminoethyl methacrylate. Of these, N,N-dimethylaminoethyl methacrylate, N,N-diethylaminoethyl methacrylate, N,N-dipropylaminoethyl methacrylate, N,N-dioctylaminoethyl methacrylate and N-methyl-N-ethylaminoethyl methacrylate are preferable. [0060] As specific examples of N,N-disubstituted-aminoalkyl acrylamides, there can be mentioned acrylamide compounds such as N,N-dimethylaminomethyl acrylamide, N,N-dimethylaminoethyl acryiamide, N,N-dimethylaminopropyl acrylamide, N,N-dImethyIaminobutyl acrylamide, N,N-diethyiaminoethyl acrylamide, N,N-diethylaminopropyl acrylamide, N,N-diethylaminobutyl acrylamide, N-methyl-N-ethylaminoethyl acrylamide, N,N-dipropylaminoethyi acrylamide, N,N-dibutylaminoethyl acrylamide^N.N-dibutylaminopropyl acryiamide, N,N-dibutylaminobutyl acjrylarnide, N.NTdihexylaminoethyl acrylamide N.N-dihexylaminopropyl acrylamide and N,N-dioctylaminopropyl acrylamide. Of these, N,N-dimethylaminopropyl acrylamide, N,N-dlethylaminopropyl acrylamide and N,N-dioctylaminopropyl acrylamide are preferable. [0061] As specific examples of N,N-disubstituted-aminoalkyi methacrylamides, there can be mentioned methacrylamide compounds such as N,N- dimethylaminomethyl methacrylamide, N,N-dimethylaminoethyl methacrylamide, N,N-dimethylaminopropyl methacrylamide, N,N-dimethylaminobutyl methacrylamide, N,N-diethylaminoethyl methacrylamide, N,N-diethylaminopropyl methacrylamide, N,N-diethylaminobutyl methacrylamide, N-methyl-N- ethylaminoethyl methacrylamide, N.N-dipropylaminoethyl methacrylamide, N,N- dibutylaminoethyl methacrylamide, N,N-dibutylaminopropyl methacrylamide, N,N- dibutylaminobutyl methacrylamide, N,N-dihexylaminoethyl methacrylamide, N,N- dihexylaminopropyl methacrylamide and N,N-dioctylaminopropyl methaorylamide. Of these, N,N-dimethylaminopropyl methacrylamide, N,N- diethylaminopropyl methaorylamide and N,N-dioctylaminopropyl methacrylamide are preferable. [0062] As specific examples of the hydroxy-substituted-alkyl acrylates and hydroxy-substituted-alkyl methacrylates, there can be mentioned hydroxymethyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl acrylate, 3-hydroxypropyl acrylate, 3-chloro-2-hydroxypropyl acrylate, 3-phnoxy-2-hydroxypropyl acrylate, hydroxymethyl methacryiate, 2-hydroxyethyl methacrylate, 2-hydroxypropyl methacrylate, 3-hydroxypropyl methacrylate, 3-chloro-2-hydroxypropyl methacrylate and 3-phnoxy-2-hydroxypropyl methacrylate. Of these, hydroxymethyl acrylate, 2-hydroxyethyl acrylate, hydroxymethyl methacrylate and 2-hydroxyethyl methacrylate are preferable. [0063] The NBR copolymers are polymerized by reaction of any of the aforementioned exemplary conjugated dienes, unsaturated nitrile, and unsaturated functional-group containing comonomers in the presence of a free radical initiator by methods well known to those skilled in the art. Suitable free radical initiators are beyond the scope of this disclosure, and are typically organic oxides, peroxides, hydroperoxides, and azo compounds, etc., such as hydrogen peroxide, benzoyl peroxide, cumene hydroperoxide, di-tert-butyl peroxide, ascaridole, acetyl peroxide, tert-butyl hydroperoxide, trimethylamine oxide, dimethylaniline oxide, isopropylperoxydicarbonate, diisobutylene ozonide, peracetic acid, nitrates, chlorates, perchlorates, azobisisobutyronitrile, etc. [0064] Hydrogenation of nitrile rubber is known to the art and to the literature. For example, a preferred commercially available X-HNBR (carboxylated-HNBR) is made from a carboxylated nitrile-diene copolymer that is hydrogenated in two steps. It is known that the C-C double bonds of the 1,2-vinyl-configured butadiene units in NBR are hydrogenated very rapidly, followed by the 1,4-cis configured units. The 1,4-trans configured butadiene units are hydrogenated comparatively slowly. The NBR products used for hydrogenation are distinguished by a predominant proportion of the 1,4-trans configured double bonds. [0065] In the 2-stage hydrogenation carbon-to-carbon double bonds are first reduced, followed by reduction of the carbon-to-nitrogen bond. As is known in the art, this procedure avoids the gelation of the hydrogenated polymers which may occur if the reduction is carried out in one step. In the first step, a different catalyst may be used, for example, a palladium or ruthenium catalyst. If desired, however, the nitriie groups alone may be reduced by proper choice of the catalyst, leaving unsaturated carbon-to-carbon bonds in the linear polymeric chain. It is possible also to use a combination of noble metal and nickel or cobalt, operating first at a relatively low temperature, then at a higher temperature. Other techniques for hydrogenating acrylonitrile-butadiene copolymers are disclosed in, for example, U.S. Pat. Nos. 4,581,417; 4,631,315; and 4,795,788. [0066] A partly or completely hydrogenated nitrile rubber (HNBR) is also described in several specifications (for example DE-OS No. (German Published Specification) 2,539,132; DE-OS No. (German Published Specification) 3,329,974; DE-OS No. (German Published Specification) 3,046,008 and 3,046,251; and European Patent No. A-111,412). All of these specifications describe a process for the preparation of a partly or completely hydrogenated NBR which can be vulcanized (for example with the aid of sulphur vulcanization systems or peroxide vulcanization systems). [0067] Hydrogenation of X-HNBR latex can be carried out by known conventional techniques. A carboxylated NBR polymer latex made conventionally using anionic surfactants is combined with (1) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (2) a reducing agent selected from hydrazine and hydrates thereof; and (3) a metal ion activator; (b) and heating the mixture to a temperature from 0 °C. to the reflux temperature of the reaction mixture. This technique is taught in U.S. Patent No. 4,452,950, assigned to Goodyear Tire and Rubber Co.. [0068] Furthermore, a hydrogenation process carried out in organic solution is known from U.S. Patent No. 4,207,409 for NBR polymers manufactured by anionic polymerization, taken up in solution in the presence of a catalyst mixture comprising a soluble compound of iron, cobalt or nickel, an aluminum-organic compound and water. [0069] The most preferred acrylonitrile-butadiene copolymers are typically hydrogenated to an extent such that the final product has an unsaturation level of from about 1 to 20 mole percent, desirably from about 1 to about 10 or 15 mole percent, and preferably from about 1 to about 5 mole percent. [0070] A suitable carboxylated hydrogenated nitrile rubber X-HNBR is manufactured by Bayer under a trade name of Therban®", for example Therban KA 8889. X-HNBR may have an iodine value of preferably about 50% or less, more preferably about 1 to 40%, most preferably from about 1 to 20%. Resistance against heat and demanding solvents can be increased when X- HNBR having a iodine value of 50% or less (high hydrogenation ratio) is used, and rubber elasticity at a low temperature can be maintained by the use of the X- HNBR rubber having a low hydrogenation ratio. The central value of the nitrile content of HNBR is preferably from about 15 to 60%, more preferably from about 25 to 50%, most preferably from about 30 to 40%. Resistance against solvents can be increased by the use of HNBR having a nitrile content of about 15% or more, particularly about 30% or more, and low-temperature flexibility can be retained by the use of the rubber having a nitrile content of about 60% or less, particularly about 50% or less. In addition, its Mooney viscosity as the central value of ML.1+4 (100° C.) (hereinafter referred to as "Mooney viscosity") is preferably from about 40 to 100, and for a coating, lower Mooney viscosity of 40- 60 is preferred. When X-HNBR having a Mooney viscosity falling within this range is used, the coating composition exhibits high resistance against organic liquids and good flexibility and low-temperature resistance. [0071] The HNBR of the present invention can also have crosslinker reactive functional groups graft-linked thereto by aforementioned methods; either before or after hydrogenation. As examples of the unsaturated compound having a functional group, may be mentioned vinyl compounds having a functional group, and cycloolefins having a functional group. The introduction of the functional group by the graft-modifying method can be carried out by reacting the HNBR with a functional group-containing unsaturated compound in the presence of an organic peroxide. No particular limitation is imposed on the functional group- containing unsaturated compound. However, epoxy group-containing unsaturated compounds, carboxyl group-containing unsaturated compounds, hydroxyl group-containing unsaturated compounds, silyl group-containing unsaturated compounds, unsaturated organosilicon compounds, etc. are mentioned for reasons of improvements of crosslinking density and adhesion to substrates at a low modification rate. [0072] Examples of the epoxy group-containing unsaturated compounds or epoxy group-containing cycloolefins include glycidyl esters of unsaturated carboxylic acids such as glycidyl acrylate, glycidyl methacrylate and glycidyi p- styryl-carboxylate; mono- or polyglycidyl esters of unsaturated polycarboxylic acids such as endo-cis-bicyclo[2,2,1]hept-5-ene-2,3-dicarboxylic acid and endo- cis-bicyclo[2,2,1]hept-5-ene-2-methyl-2,3-dicarboxylic acid; unsaturated glycidyl ethers such as ally! glycidyl ether, 2-methyl-allyl glycidyl ether, glycidyl ether of o- allylphenol, glycidyl ether of m-allylphenol and glycidyl ether of p-allylphenol; and 2-