Binder for the coating of plastic substrates without chemical or physical pretreatment

description

The invention relates to a binder, and a primer for the coating of plastic substrates, a Uni-coat, one-layer metal-effect coating, an adhesive and a plastic, in which the binder is introduced. Furthermore, the invention provides methods for the preparation of a binder or a primer for the coating of plastic substrates, a Uni-Einschichtlackes, a metal-effect coating and an adhesive concerns.

With the novel binder can be a variety of

manufacture coating products that adheres directly and without any chemical or physical pretreatment on plastics. It can be primers, high-gloss paints, metallic paints, varnishes, lacquers produce effects that lead directly to

Plastics can be applied as indicated by the no longer required

Pretreatment is a novelty. It can according to the invention with the

Binder also be formulated adhesives which a very good bond between the plastics itself and also ensure cardboard.

In industry, plastics are widely used because of their beneficial properties and versatile applicability. In the field of vehicle production, for example, plastics for the production of vehicle parts and

Accessories also used outside both indoors. It is useful for various reasons to be provided with a coat plastics. On the one hand, by the coating of a plastic material the appearance of the

Plastic, for example, enhanced with color. Furthermore, the plastic may be coated to increase the weather resistance and light resistance.

In industry moldings on plastic basis are now used increasingly to be used in conjunction with metal parts and require painting. This is especially true for automotive parts from increasingly

be made of plastics such as bumper fascias, spoilers, rocker panel, wheel trims, and side panels or moldings. For such moldings are increasingly plastics with a polypropylene content, so-called blends of polypropylene, with a polypropylene content of more than 50 percent by weight (wt .-%), based on the plastics content, is used. Such parts are being coated in Uni-contrast tones, uni-body color tones and hues in effect body, and in contrast effect color shades. such

However, coatings are not without problems.

Coatings for solid colors as well as effect-contrast colors must be formulated so that they meet the following requirements: good adhesion of the topcoat system (Uni Topcoat or effect basecoat) on the plastic surface and without chemical pretreatment with low modulus of elasticity of <900 and chemical pre-treatment, namely for example flame treatment, corona and

Plasma treatment, many polypropylene blends with an elastic modulus of <600th

It was previously not possible in the automotive sector, for paints

Polypropylene plastic parts in effect body color tones, that is, in such coatings which comprise effect pigments, such as metal pigments or pigments based on mica flakes and color matching have to have with the paints for the coating of automobile bodies, to operate without prior priming of the plastic part prior to the top coating.

An important prerequisite for a high quality coating, the adhesion to the substrate, ie the substrate surface. It is generally known that especially in the coating or coating of plastics, especially of non-polar plastics, such as polypropylene (PP) in pure form or in modified form ((for example, by the addition of ethylene-propylene-diene mixed polymers EPDM)), sometimes serious liability problems for

can plastic substrate occur. In order to achieve acceptable adhesion of each coating agent, such non-polar plastics

conventionally a surface-activating chemical or physical

Pretreatment subjected. The most commonly applied techniques are flame treatment, plasma treatment, and corona discharge. It is also known to use to improve adhesion adhesion-promoting substances, especially chlorinated polyolefins. The use of the adhesion-promoting

Substances are for example the adhesive primer containing the adhesion-promoting substances and in a separate coating operation on the

Plastic substrate are applied. This adhesive primer are possible in the prior art but without pigmentation and form a transparent thin layer, which enables the adhesion to the subsequent coating layer.

The direct addition of adhesion-promoting substances to the

Coating agent, with the decorative and / or technically functional coating is to be made is in the prior art

problematic. Even with surface-activating pretreatment adhesion of coatings on plastic substrates is not always sufficient, so that coatings of painted plastic parts, for example by

Weathering or mechanical stress gradually replace. hence the use of adhesion-promoting substances leads in the prior art

very often not optimal adhesion properties. Added to this is that the

Use of adhesion-promoting substances, especially chlorinated

, From an ecological point is disadvantageous polyolefins. When using aqueous coating compositions which prevail for environmental reasons and in the plastic coating, more and more, are the liability issues in particular in the coating of non-polar plastic substrates due to the differences in polarity of the two media, the plastic substrate and the

Coating agents, reinforced.

The object of the present invention is to provide a binder, resulting in particular a primer, a basecoat, a Uni-coat, a

Metallic effect paint or other single coat for coating plastic substrates or an adhesive can be prepared which do not exhibit the shortcomings of the prior art. The binder and produced therefrom primers, coatings or adhesives to have excellent adhesion to the plastic substrate. Further, the binder and the products produced therefrom should have a high adhesion property. Under the adhesion property is preferably meant that particularly stable adhere to the plastic after coating of Kunststoffsubtraten with the binder or primer coatings prepared therefrom, and thus a coating with low cost and high quality is possible.

Another object of the invention is therefore to provide a binder for a variety of coatings that do not require more adhesion promoters and even without the conventional chemical or physical pretreatment methods have good adhesion to plastics. Furthermore, should the primers produced with the binder and a good recoating adhesion to

ensure topcoats. The aim of the overall structure stably on the plastic stick without the necessary according to the prior art

Pretreatments such as non-pigmented primer or

having to use physical treatments. Thus, a further object of the present invention to provide a process for coating plastic substrates by using a binder, or a primer, which makes it possible to provide plastic substrates with a coating or lacquer layer whose adhesion is excellent on the respective plastic substrate and thus surprising better than is possible in the prior art. In particular, the adhesion, the plastic coatings produced by the inventive process should be better than

Paint layers with previously known methods on plastic substrates

be applied. Furthermore, the process without extensive pretreatment of the plastic will, as described in the prior art, to be executable.

The object is inventively solved by a binding agent according to Claim. 1 The dependent claims represent preferred embodiments for achieving the object.

The invention relates to a binder for coating plastics produced by a method comprising the steps of:

1) preparing a first intermediate product by a process comprising the steps of:

1 a) mixing and dissolving 5-45 wt .-% of a chlorinated

Polyolefin mixture in 50 to 99 wt .-% of a first organic solvent

1 b) heating the mixture from the previous step to a

Temperature between 65 ° C - 120 ° C for at least 30 min

1 c) feeding from 0.05 to 5 wt .-% of a modified silane mixture to the mixture from the previous step at a

Mixing temperature of 65 ° C - 120 ° C,

wherein the wt .-% in 1 a) - c 1) based on the total weight of the first intermediate product and the sum of the wt .-% is less than or equal to 100

2) processing the first intermediate product to the binder by a process comprising the steps of:

2a) mixing 5 to 40 wt .-% of a vinyl chloride-vinyl ether copolymer in 50 to 90 wt .-% of a second organic

solvent

2b) feeding from 10 to 80 wt .-% of the first intermediate product to the mixture of the previous step

2c) homogenizing the mixture from the previous step, wherein the percentages .-% in 2a) - 2c) to the total weight of the

Refer binder and the sum of the wt .-% is less than or equal to one hundredth

A preferred producible by such a method the binder has a surprisingly high adhesion ability to plastics. Such a binder is therefore particularly suitable as a base material for a coating of plastics. In particular, the binder for the coating of

Plastics suitable without the conventional chemical or physical pretreatment methods are applied. On plastics, which under

Use of the binder according to the invention were coated, adhering coatings, paints or adhesives with high resistance preferably directly to the plastics without requiring a complicated pretreatment of the plastics as in the prior art is necessary. At least partly distinct the adhesion property of the binder can be attributed to a high degree of crosslinking of the binder. Furthermore, the binder has a high polarizing activity against plastic surfaces, so that it permanently adheres to the latter and facilitates the adhesion of additional layers such as paints. is particularly surprising, that binding agents according to the invention is in particular also for the coating of non-polar and solvent-resistant plastics and having suitable to this a high adhesion. The steps above are

advantageously are particularly suited to the proportions by weight of the chlorinated polyolefin mixture initially homogeneous organic in the first

to mix solvents. In particular, the step of heating leads to a temperature between 65 ° C - 120 ° C at a particularly reactive chlorinated

Polyolefin blend. The reaction mixture is adapted to connect by the thermal activation energy in particularly with the modified silane mixture and to cause the positive adhesion properties described on plastics. Due to the activation temperature active molecule groups are formed in the chlorinated polyolefin blend, which with the silanes at the stated temperature a particularly homogeneous complex radicals having required for the subsequent mixing with the vinyl chloride-vinyl ether copolymer to enable optimal cross-linking reaction , This is a particularly surprising effect, which was recognized in the present invention. So it is in this

Temperature range to an increased evaporation of organic solvents. Therefore, the implementation of the heating of the mixture to a temperature between 65 ° C and 120 ° C on an industrial scale requires a higher technical effort and the use of special mixing body and print devices. Therefore, for a skilled person, it is not obvious for the preparation of a binder, the process steps of mixing a chlorinated polyolefin blend with a modified

Silane mixture at a temperature of 65 ° C - 120 ° C to carry out. Not only in terms of the relative components, but in particular with respect to the process steps for the preparation of the binder at said temperatures, therefore, represents the present invention can be produced binder is a departure from the prior art. In the embodiment of the process steps, it may be preferable that a maturing time 120 ° C reaction phase for the first intermediate observed before this is further works in step 2c) to the binder - of at least 12 hours preferably at least 24 hours after the 65 ° C.

The invention preferably comprises a binder, which can be produced by the above process. Ie are preferably also comprises those binders which can be prepared by different procedures of the invention, but have the same properties as in the present invention can be produced binder. In a particularly preferred embodiment, the invention relates to the binders prepared by the above process.

In a preferred embodiment, for producing the first

Intermediate first 10 - 20 wt .-% dissolved of the chlorinated polyolefin mixture in 80 -90 wt .-% of the first organic solvent and mixed. Further, the resultant mixture is preferably heated to a temperature of 65 ° C - 120 ° C, preferably 75 ° C - 1 10 ° C, heated for at least 30 min. Subsequently, it is particularly preferred the heated mixture 0,1 - 0,5 wt .-% of the modified silane mixture at a mixing temperature of 65 ° C - 120 ° C supplied. Said preferred

Parameter ranges lead to a particularly increased adhesion capacity on non-polar plastic.

Furthermore, in a preferred embodiment, the chlorinated polyolefin mixture is gradually added to the first organic solvent with constant stirring by a dissolver, wherein the dissolver having a preferred diameter of 220 mm to 350 mm, and the stirring speed of the dissolver preferably 300 -700 rpm throughout is preferably 500 revolutions per minute. Such a mixed approach is particularly suited to the reactivity of the

to increase raw materials and to obtain a very well-connected binder.

Furthermore, the feeding of the modified silane mixture under constant stirring of the mixture in the present process in step 1b) is carried out in a further preferred embodiment, by a dissolver, wherein the dissolver having a preferred diameter of 220 mm to 350 mm, and the

Stirring speed of the dissolver preferably 300-700 rpm, most preferably 500 revolutions per minute. These values ​​are particularly suitable to obtain a homogeneous mixture and to increase the surface activity of the binder on plastics.

In a further preferred embodiment, the heating is carried out of in the inventive binder produced by the above process in step 1 b)

Mixture to a temperature of 65 ° C - 120 ° C for 1 h to 12 h preferably for 4 h to 6 h. These periods of heating allow a slow rise in the

Reactivity of the mixture and therefore suitable to a particular degree to

to obtain a homogeneous and crosslinked binder for coating plastics. Such a binder has a particularly high adhesion property by a high polarization potential on plastics.

In a further step of the method according to the invention is first 5-40% of a vinyl chloride-vinyl ether copolymer in 50 to 90% of an organic

Solvent solved. The solvent used is particularly preferably be selected from the group of the aromatics, particularly preferred is xylene. This

Process step may preferably be at room temperature, for example in a

carried out a temperature range of 20-25 ° C. The homogenization in step 2b) is preferably effected with the aid of a dissolver, wherein the dissolver disc is a preferred

has diameter of 220 mm to 350 mm and the stirring speed of the dissolver preferably 300-700 rpm, particularly preferably 500 revolutions per minute.

Subsequently, this resultant mixture is mixed with the first intermediate product and homogenized. homogenizing is preferably carried out using a dissolver at a room temperature, for example between 20 ° C - 25 ° C In this case, preferably, the dissolver to a diameter of 220 mm to 350 mm, where, based on this size preferable stirring speed of the dissolver 300 -700 revolutions per minute particularly preferably 500 revolutions per minute. For the purposes of the invention is meant preferably an at least partially preferably unifying mixing of the chemical components under the homogenization, which can be achieved by mechanical steps such as stirring, shaking etc..

Thus, the binder contains 10-80 wt .-% of the first intermediate. The positive properties of the first intermediate product for adhesion to plastics can be increased by feeding the vinyl chloride-vinyl ether copolymer.

Surprisingly, the vinyl chloride-vinyl ether copolymer particularly advantageous reacts with the components of the first intermediate product, thereby producing a binder which an especially strong adhesion with

having plastic surfaces. It was particularly surprising that this leads to synergistic effects through which the binder particularly strong and fast with plastic surfaces, especially non-polar plastic surfaces, reacts. In contrast to the prior art, no complex physical or chemical pretreatment is necessary for the coating of plastics with the inventive binder. this is as described above-mainly due to the reaction in the preparation of the first intermediate product, in which is formed of active moieties of the chlorinated polyolefins, together with the silanes a complex of free radicals. According to the invention was recognized,

that a particularly strong crosslinking can be achieved with the vinyl chloride-vinyl ether copolymer due to these components of the first intermediate.

Thus, a strong polarization of the plastic surface is achieved by the binder, which increases the wetting of the plastics and thereby the adhesion on plastics which are coated with the binder. Such a binder is therefore particularly suitable as base material for a coating of

suitable plastics. To plastics which have been coated using products based on the binder of the invention adhere coatings, paints or adhesives with high resistance without an expensive pre-treatment of plastics, such as in the prior art is necessary. At least partly, the pronounced bonding capacity of the binder as described above can be attributed to a high degree of crosslinking of the binder. Furthermore, the binder has a high polarizing activity against plastic surfaces, so that it permanently adheres to the latter and facilitates the adhesion of additional layers such as paints.

The skilled artisan will appreciate also that preferably different sequences of steps of the method for preparing a binder according to the invention are suitable. It is preferred to produce a first intermediate product according to steps 1 a) to 1 c) in separate batches to produce a second intermediate product of step 2a) and then to mix the first and second intermediate in a step 2b). It may also be preferred that the first intermediate product according to steps 1 a) to 1 c) is prepared in one batch and this first intermediate product, the components of the second intermediate product to be supplied.

In a further preferred embodiment, therefore, the invention comprises a binder prepared by a method comprising the steps of:

i) mixing and dissolving 0.5 to 36 wt .-% of a chlorinated

Polyolefin mixture in 5 to 79 wt .-% of a first organic solvent

ii) heating the mixture from the previous step to a

Temperature between 65 ° C - 120 ° C for at least 30 min iii) supplying from 0.005 to 4 wt .-% of a modified silane mixture to the mixture from the previous step at a

Mixing temperature of 65 ° C - 120 ° C,

iv) feeding 5-40 wt .-% of a vinyl chloride-vinyl ether copolymer and 50-90 wt .-% of a second organic solvent to the mixture of the previous step

v) homogenizing the mixture from the previous step, wherein the percentages .-% in i) - refer v) on the total weight of the binder and the sum of the wt .-% is less than or equal 100th

It is preferred that the steps iv) and v) at room temperature between 20 ° C and 25 ° C is performed.

In a further preferred embodiment of the invention, there is

Further processing of the first intermediate product by a process comprising the steps of:

2a) mixing 20-30 wt .-% of the vinyl chloride-vinyl ether copolymer in 40 - 60 wt .-% of the second organic solvent

2b) feeding from 10 to 30 wt .-% of the first intermediate product to the mixture of the previous step

2c) homogenizing the mixture from the previous step, wherein the wt .-% in the steps 2a) - refer 2c) to the total weight of the binder and the sum of the wt .-% is less than or equal 100th

A binder which can be produced with the aforementioned percentages by weight, is particularly suitable, as is possible by using such, possibly processed binder, a particularly durable coating of plastics for coating a plastic. Furthermore, the quality of the coating with respect to their resistance, smoothness or visual appearance even under high stress from barely or not.

In a particularly preferred embodiment, the invention therefore relates to a binder for coating plastics produced by a method comprising the steps of:

1) preparing a first intermediate product by a process comprising the steps of:

1 a) mixing and dissolving 10 to 20 wt .-% of a chlorinated

Polyolefin mixture in 80 to 90 wt .-% of a first organic solvent

1 b) heating the mixture from the previous step to a temperature between 65 ° C - 120 ° C for at least 30 min

1 c) supplying from 0.1 to 0.5 wt .-% of a modified silane mixture to the mixture from the previous step at a

Mixing temperature of 65 ° C - 120 ° C,

wherein the wt .-% in 1 a) - 1 c) to the total weight of the first

Intermediate refer and the sum of the wt .-% is less than or equal to 100

2) processing the first intermediate product to the binder by a process comprising the steps of:

2a) mixing 20-30 wt .-% of a vinyl chloride-vinyl ether copolymer in 40 -60 wt .-% of a second organic

solvent

2b) feeding from 10 to 30 wt .-% of the first intermediate product to the mixture of the previous step

2c) homogenizing the mixture from the previous step, wherein the wt .-% in 2a) - refer 2c) to the total weight of the binder and the sum of the wt -.% Is less than or equal to 100.

These parameter ranges result in a binder having a particularly high molecular affinity for plastics, in particular also polar plastics. Furthermore, the

Binder particularly stable and durable. Such a binder can thus also for a long time, that are kept for at least 10 months without that its adhesion properties are significantly reduced with respect to plastics.

The skilled artisan will appreciate further that are suitable different sequences of steps of the manufacturing process and of preferred embodiments of the invention can be prepared according binder. It is preferable, as set forth above in separate runs a first intermediate product according to steps 1 a) to 1 c manufacture) to produce a second intermediate product of step 2a) and then to mix the first and second intermediate in a step 2b). but it may also be preferred for example, that the first intermediate product according to steps 1 a) to 1 c) is prepared in one batch and this first intermediate product, the components of the second intermediate product to be supplied.

In a further preferred embodiment, therefore, the invention comprises a binder prepared by a method comprising the steps of:

i) mixing and dissolving 1-6 wt .-% of a chlorinated

Polyolefin mixture within 8 - 27 wt .-% of a first organic solvent

ii) heating the mixture from the previous step to a

Temperature between 65 ° C - 120 ° C for at least 30 min iii) feeding from 0.01 to 0.15 wt .-% of a modified silane mixture to the mixture from the previous step at a mixing temperature of 65 ° C - 120 ° C,

iv) feeding from 20 to 30 wt .-% of a vinyl chloride-vinyl ether copolymer and 40 -60 wt .-% of a second organic

Solvent to the mixture of the previous step v) homogenizing the mixture from the previous step, wherein the percentages .-% in i) - refer v) on the total weight of the binder and the sum of the wt .-% by less than or equal to 100 , It is preferred that the steps iv) and v) at room temperature between 20 ° C and 25 ° C is performed.

The term "chlorinated polyolefin blend" are particular chemical

compounds which on at least 70 wt .-%, and preferably at least 90 wt .-% of one or more chlorinated polyolefins, wherein the wt .-% relate to the chlorinated polyolefin blend. a chlorinated

Polyolefin mixture thus preferably comprises mainly chlorinated polyolefins can, but need not, consist exclusively of chlorinated polyolefins. In particular, additional components can comprise the present invention, a chlorinated polyolefin blend as preferred resins preferably selected from a group comprising amino resins, epoxy resins and bisphenol A-epichlorohydrin resin. Further, a chlorinated polyolefin blend may also contain other components, in particular, a chlorinated polyolefin blend include chloroform.

It is preferred that the chlorinated polyolefin blend having a chlorine content between 10% - 50% has preferably between 20% and 35% and more preferably between 25% and 30%. The aforementioned chlorine levels permit the formation of a particularly cross-linked binder and thus increase the reactivity of the binder with the plastic to be coated. This plastic can be particularly good adhesion on plastics, especially nonpolar be achieved.

Preferred chlorinated polyolefin blends are a chlorinated polyethylene resin, a chlorinated polypropylene resin, a maleic anhydride-modified chlorinated

Polyethylene resin, a urethane-modified chlorinated polypropylene resin, a chlorinated ethylene-propylene copolymer or a chlorinated ethylene-vinyl acetate copolymer, each having a chlorine content of preferably 10 - 30% by weight have.

In preferred embodiments, the chlorinated polyolefin mixture is a Hardlen®, preferably a Hardlen ® 14 LWP, Hardlen ® 13-LP, Hardlen ® 13 LLP, Hardlen ® 15-LP, Hardlen ® 15 LLP, Hardlen ® 16-LP, Hardlen ® DX-526P, Hardlen ® CY-9122P, Hardlen ® CY-9124P, Hardlen ® HM-21P, Hardlen ® M-28P, Hardlen ® F-2P, Hardlen ® F-6P, Hardlen ® CY-1 132 Hardlen ® EH-801 or Hardlen ®EW 5,303th Most preferably, the chlorinated polyolefin blend is a Hardlen ® 14-LWP or Hardlen ® DX-530P.

The aforementioned Hardlen ® types are property details of particularly preferred chlorinated polyolefin blends, which have developed into a quality description. The characterization of the particularly preferred chlorinated

Polyolefin mixtures of these trade names is unique. a clearer

Characterization of Hardlen ® types as beyond the commercial brand names is not possible or appropriate. The Hardlen ® types are related to the chemical compounds, such as those manufactured by Toyobo and were specified on the data sheet of the company Toyobo in April 2015 and published. In April 2015, the technical data sheet could be downloaded from http://www.toyobo-global.com/seihin/hardlen/.

"Chlorinated polyolefins" are especially chlorinated polymers of the structure (-CH 2 -CR 1 R 2 ) n to be understood, in which R 1 and represents hydrogen R 2 for

Is hydrogen, a straight-chain or branched saturated aliphatic or

cycloaliphatic group or an unsaturated group such as the phenyl radical. Concrete such polyolefins are polyethylene, polypropylene, polybutylene, polyisobutene, polyhexene, polyoctene, polydecene and polyoctadecene and polystyrene. Particularly preferred is chlorinated polypropylene. Chlorinated polyolefins are preferably obtained by chlorination of these polymers and / or polymerization of monomers which already contain chlorine, z. As vinyl chloride and vinylidene chloride.

As "modified silane" is particularly understood to mean a chemical compound which is at least 30 wt .-%, preferably at least 50 wt .-%, more preferably at least 70 wt .-% and most preferably at least 90 wt .-% of a or more modified silanes included, wherein the wt .-% relate to the modified silane.

By "modified silane" is meant in particular a silane derivative and / or a modified silane compound. The skilled worker knows that alkanes and / or germane are chemically similar to silanes substance groups. In certain

Embodiments, thus relates to a modified silane also a modified alkane, an alkane derivative, a modified alkane compound, a modified German, a

German derivative and / or a modified German connection. In another preferred

Embodiments is to be understood an organofunctional silane with a modified silane. In certain embodiments, a vinyl-functional silane also is understood to mean a modified silane. In a particularly preferred

Embodiment is understood to mean a modified silane, a modified epoxysilane. In a further particularly preferred embodiments with a modified silane functional epoxysilane is meant having the general structure R 1 a R 2 b Si (OR 3 ) 4-ab .wobei R 1 is a epoxy-substituted alkyl or

Is aralkyl wherein the alkyl having 4-30 C atoms, R3 is an alkyl or alkoxy-substituted alkyl, aryl or aralkyl group having from two to ten carbon atoms, R2 is an alkyl group or alkoxy substituted alkyl, aryl or aralkyl group having from one to ten carbon atoms, a is 1 to 3 and b is 0 to 2, with the proviso that a + b is 1, 2 or 3rd The groups R 1 , R 2 , and R 3 can be cyclic, branched or straight chain. In a most preferred embodiment, the modified silane described .beta. (3,4-epoxycyclohexyl) ethyltriethoxysilane, and other variants of this chemical compound, as described in US 571,432th In especially preferred embodiments, the modified silane CoatOSil® 1770.

CoatOSil ® 1770 is a concrete indication of a particularly preferred modified silane, which have developed into a quality description. The characterization of the particularly preferred modified silane mixture over the commercial brand name CoatOSil ® 1770 is possible and reasonable.

CoatOSil ® 1770 refers to chemical compounds, such as those manufactured by the company Momentive and on the technical data sheet of the company

Momentive was specified in April 2015 and published. In April 2015, the technical data sheet was at https: // www. Momentive. id = 20459 be downloaded com / Products / home.aspx?.

The vinyl chloride-vinyl ether copolymer is preferably obtained by copolymerization of vinyl chloride (C2H3CI empirical formula having a molecular weight of 62.50 g / mol) with vinyl ethers. The vinyl chloride-vinyl ether copolymer is preferred, therefore also referred to as vinyl chloride and vinyl ether-based copolymers. characterized organic compounds of polyvinyl chloride and diisopropyl ether are preferably obtained. A vinyl group preferably denotes a reactive ethene radical, in particular the atomic group R-CH = CH2. In the figure below, the vinyl group as the functional group in any molecule (above), vinyl chloride (middle), and styrene is shown (below).

A particularly preferred vinyl ether is isobutyl having the empirical formula

C6H12O and a molecular weight of 100.16 g / mol. Thus, particularly preferred is a verseifungsbeständiges copolymer of vinyl chloride and isobutyl vinyl ether, which is suitable for use as a binder for printing inks, Stassenmarkierungs-, facades and anticorrosive paints, and coatings on light metal, concrete and plastics. A particularly preferred vinyl chloride-vinyl ether copolymer is, therefore, a vinyl chloride-isobutyl vinyl ether copolymer. Particularly preferred vinyl chloride copolymers are the isobutyl Laroflex ® MP product group, preferably the Laroflex ® MP 15-45 and most preferably Laroflex ® MP 35th

Laroflex ® MP binder and Laroflex ® MP 35 Property details of particularly preferred binder of vinyl chloride and isobutyl vinyl ether are based co-polymer (vinyl chloride-isobutyl vinyl ether copolymer), which is a

Have developed a quality description. The characterization of the particularly preferred binder of vinyl chloride and isobutyl-based co-polymers of this trademark is unique. A clearer characterization of Laroflex ® MP binder and Laroflex ® MP 35 as commercially available on the

Brand name is not possible or appropriate. Laroflex ® MP binders and laroflex ® MP 35 are related to the chemical compounds, such as those manufactured by BASF and are specified on the technical data sheet BASF in November 2010, and published.

It is preferable that the vinyl chloride-vinyl ether copolymers, preferably the

Vinyl chloride-isobutyl vinyl ether copolymer, a chlorine content between 20% - 60% preferably between 30% and 50% and more preferably between 40% and 48%. The aforementioned chlorine levels allow a particularly high reactivity of the vinyl chloride-vinyl ether copolymer with mixtures of chlorinated polyolefins and modified silanes and thus resulting in a high adhesion of the binder on plastics, in particular also non-polar plastics.

Another preferred vinyl chloride-isobutyl vinyl copolymers are HERRMANN 45 MP or Hostaflex VCM 6230 the company Anhui Herrman Impex Co., Ltd.

Under the adhesion property is preferably meant that after a

Coating of Kunststoffsubtraten without physical or chemical

Pretreatment with the binder or primer subsequent

Paint particularly stable adheres to the plastic and thus a coating with low cost and high quality is made possible. Here, the

Bonding capacity on plastics not limited to imparting a particularly good adhesion of coatings on plastics, but can continue as the teaching of a particular good adhesion of other materials such as plastic cause glue or plastics themselves on plastics.

With plastics are preferred Acrylester-styrene-acrylonitrile, acrylonitrile / butadiene / acrylate, acrylonitrile-butadiene-styrene, acrylonitrile / chlorinated polyethylene / styrene, Acrylnitri I /

Methyl methacrylate, butadiene rubber, butyl rubber, casein plastics,

Artificial horn, cellulose acetate, cellulose acetate, cellulose nitrate, chloroprene rubber, chitin, chitosan, cyclic olefin copolymer, epoxy resin, ethylene-ethyl acrylate copolymer, ethylene-propylene copolymer, ethylene-propylene-diene rubber,

Ethylene vinyl acetate rubber, fluorine rubber, liquid crystal polymers, urea-formaldehyde resin, high impact polystyrene, isoprene rubber, lignin, melamine-formaldehyde resin, melamine / phenol-formaldehyde, methyl acrylate / butadiene / styrene, natural rubber (gum arabic), phenol-formaldehyde resin, perfluoroalkoxylalkane, polyacrylonitrile, polyamide, polybutylene terephthalate, polybutylene terephthalate, polycaprolactone, polycarbonate, polychlorotrifluoroethylene, polyester, polyester amide, polyether block amide, polyether imide, polyether ketone, polyether sulfone, polyethylene, polyethylene terephthalate, polyhydroxyalkanoates, polyhydroxybutyrate, polyimide, polyisobutylene, polylactide

(Polymilchsäure), Polymethacrylmethylimid, Polytrimethylenterephthalat,

Polymethylmethacrylat, Polymethylpenten, Polyoxymethylen oder Polyacetal,

Polyphenylene ether, polyphenylene sulfide, polyphthalamide, polypropylene, polypyrrole, polystyrene, polystyrene foamed, polysulfone, polytetrafluoroethylene, polyurethane, polyvinyl acetate, polyvinyl butyral, polyvinyl chloride (rigid PVC), polyvinyl chloride (soft PVC), polyvinylidene fluoride, polyvinyl pyrrolidone, Silocon rubber, styrene-acrylonitrile copolymerizate, from styrene-butadiene, styrene-butadiene-styrene, thermoplastic starch, thermoplastic polyurethane, unsaturated polyester, vinyl chloride / ethylene, and vinyl chloride / vinyl meant ethylene / methacrylate.

Particularly preferred are polymers with polypropylene (PP), ethylene-propylene-diene rubber (PP-EPDM), expanded polypropylene (EPP), glass fiber reinforced

Plastic (GFRP), acrylonitrile-butadiene-styrene (ABS), polyamide (PA) PA 6,

Polybutylene terephthalate (PBT) and / or polyvinyl chloride (PVC) meant.

With paints are generally preferred coating materials with protective and / or optical effect, for example by coloring, understood, in particular, with paints 1-component lacquers, 2-component lacquers, single coat, lacquers, protective coatings, alkyd resin paints, oil paints, oil varnishes, cellulose nitrate lacquers; Bitumen and tar varnish, shellac, phenol lacquers, varnishes urea, melamine resin varnishes polyester-based,

Paints, epoxy resin paints, polyurethane resin paints, varnishes polystyrene,

Polyvinylharzlacke, paints or lacquers based on acrylic polymers, paints or lacquers based on synthetic polymers, industrial coatings, powder coatings, emulsion paints,

Resin-bonded plasters, Leimanstrichfarben, watercolors, silicate paints, silicate plasters, latex paints, Elektrophoreselacke, water-based paints,

Silicone resin emulsion paints; Silicone resin renders or paints meant based on synthetic or natural polymers.

Furthermore, particularly preferred are aromatic solvents with organic solvents such as xylene, toluene or naphtha Sovent or flavors containing solvents such as, for example, ink oil or mineral spirits meant.

In a preferred embodiment, the invention thus relates to a binder prepared by the inventive method, wherein the chlorinated

Polyolefin blend one or more chlorinated polyolefins and resins, preferably selected from a group comprising amino resins, epoxy resins and bisphenol A-epichlorohydrin resin, comprising.

In a particularly preferred embodiment, the invention relates to a binder prepared by the inventive method, wherein the chlorinated

A polyolefin mixture Hardlen ® comprises, preferably Hardlen ® 14 LWP and / or a Hardlen ® DX-530P includes.

A Hardlen ® , preferably a Hardlen ® 13-LP, a Hardlen ® 13 LLP, a Hardlen ® 15-LP, a Hardlen ® 15 LLP, a Hardlen ® 16-LP, a Hardlen ® DX-526P, a Hardlen ® CY-9122P, a Hardlen ® CY-9124P, a Hardlen ® HM-21P, a Hardlen ® M-28P, a

Hardlen ® F-2P, a Hardlen ® F-6P, a Hardlen ® CY-1 132, a Hardlen ® EH-801, a Hardlen ® EW-5303, very particularly preferably a Hardlen ® 14 LWP and / or a Hardlen ® DX-530P make it a particularly suitable chlorinated polyolefin mixtures for the preparation of the binder is, as these in the particularly

Increase bonding capacity for non-polar plastics. Furthermore, it was completely surprising that the Hardlen said ® types and quite particularly Hardlen ® 14 LWP and / or Hardlen ® DX-530P increase the shelf life of the binder. To retain the use of the said Hardlen ® types and quite particularly using Hardlen ® 14 LWP and / or Hardlen ® DX-530P produced

Binder over a long period of over 12 months at an increased bonding capacity.

In a further preferred embodiment of the binder according to the invention the first organic solvent is an aromatic hydrocarbon, preferably selected from the group consisting of xylene, toluene, and solvent naphtha. The solvents mentioned are particularly suitable in the chlorinated

Polyolefin blend and to solve the modified silane mixture and thus provide a homogeneous binder, and with a high degree of crosslinking.

In a particularly preferred embodiment, the inventive binder comprises a modified silane mixture, which is preferably a modified

Epoxysilane particularly preferably a CoatOSil ® is the 1770th The

Coating properties of the epoxysilane particular CoatOSil ® 1770 result when mixed with the chlorinated polyolefin blend too surprising effects. In particular, the blending increases the binding affinity for plastic substrates in particularly so that a thus produced binder has excellent adhesion to various plastic substrates.

In a preferred embodiment, the binder is characterized in that it is produced by the above method, wherein in a further step, the mixture of 2c) of 1 - 35 wt .-%, preferably 0.5 to 2 wt .-% of a supplied acrylate are, with the wt .-% are based on the total weight of the binder. Very particularly preferably, in the acrylate to methacrylate resin particularly preferably Degalan ® PM 381 N. Advantageously, performs the further addition of the aforementioned acrylates, to that the binder adheres particularly well to plastics and these thus particularly well prepared for coating as paints.

In a further preferred embodiment, the binder is characterized

in that the second organic solvent comprises an aromatic hydrocarbon, preferably selected from the group consisting of xylene, toluene, and solvent naphtha. These are particularly suitable for dissolving and mixing the polymer components, in particular of vinyl chloride and isobutyl-based co-polymers.

Most preferably, the second organic solvent comprises xylene. For this composition, a particularly high viscosity of the binder is further added at equally high degree of crosslinking. The preferred embodiment is thus particularly suitable for the coating of plastics.

In a further embodiment, the binder is characterized in that the second organic solvent comprises an ester, preferably selected from a

Group consisting of butyl acetate, 1-methoxypropyl, methyl, ethyl glycol acetate, butyl glycol and ethyl diglycol acetate comprises. This increase in particularly the homogeneity and reactivity of the binder.

Furthermore, in another embodiment, the organic solvent is 20-60 wt .-% of butyl acetate and 40-80 wt .-% of xylene are made can, wherein the sum of the wt .-% of butyl acetate and yields of xylene 100th

In a preferred embodiment, the binder is characterized in that the vinyl chloride-vinyl ether copolymer is a vinyl chloride-isobutyl vinyl ether copolymer, that is vinyl chloride (C2H3CI) and isobutyl (C6H12O) based co-polymers. Particularly preferred vinyl chloride copolymers are Isobutylvinylether- Laroflex ® MP (MF 0-CH2-CH (CH3) 2- (CH2-CH) m- (CH2-CHCl) n main raw material Cinylchloride 75%; 25% of vinyl isobutyl ether) binder preferably Laroflex ® MP 35. the Laroflex ® MP binders particular Laroflex ® MP 35 increases the polarization of the binder with respect to plastic surfaces in a particular degree. Furthermore, the Laroflex lead ®MP binder particular Laroflex ® MP 35 in a particularly stable crosslinking of the binder according to the invention, increasing its adhesion property.

In a further embodiment, the invention relates to a process for preparing a binder comprising the steps of:

1) preparing a first intermediate product by a process comprising the steps of:

1 a) mixing and dissolving 5-45 wt .-% of a chlorinated

Polyolefin mixture in 50 to 99 wt .-% of a first organic solvent

1 b) heating the mixture from the previous step to a

Temperature between 65 ° - 120 ° C for at least 30 min

1 c) feeding from 0.05 to 5 wt .-% of a modified silane mixture to the mixture from the previous step at a

Mixing temperature of 65 ° C - 120 ° C,

wherein the wt .-% in 1 a) - c 1) based on the total weight of the first intermediate product and the sum of the wt .-% is less than or equal to 100

2) processing the first intermediate product to the binder by a process comprising the steps of:

2a) mixing 5 to 40 wt .-% of a vinyl chloride-vinyl ether copolymer in 50 -90 wt .-% of a second organic solvent

2b) feeding from 10 to 80 wt .-% of the first intermediate product to the mixture of the previous step

2c) homogenizing the mixture from the previous step, wherein the percentages .-% in 2a) - refer 2c) to the total weight of the binder and the sum of the wt .-% is less than or equal 100th

The skilled artisan will appreciate that preferred embodiments which have been disclosed for the inventive binders are also preferred for the inventive process. Continue to apply advantages which have been disclosed for the inventive binder and preferred embodiments thereof, also for the erfindungsmäße method and of a product manufactured by the inventive method the binder. The invention thus also relates to a method according to the invention through the preferred embodiments thereof as well as

Binders prepared.

The binder according to the invention has a high adhesion property to plastics. Here, the bonding power is not just limited to the generation of a particularly good adhesion of an overall coating system on plastics, but it is also imparting a particularly good adhesion of other materials, such as plastic glue or plastics themselves possible on plastics.

Furthermore, the inventive binder is due to its high

Suitable adhesion-promoting assets particularly suitable for the manufacture of a primer for a lacquer coating plastics.

The invention thus further relates to a primer for the coating of

Plastics produced by a method comprising the steps of

3a) mixing 10-30 wt .-% of the binder, 2 - 10% by weight of a Bentonitgemisches

3b) adding 10-30 wt .-% of a pigment mixture to the mixture of the previous step

3c) adding 0.1 to 5 wt .-% of an additive mixture to the

Mixture from the previous step

3d) adding 10-50 wt .-% of a third organic

Solvent to the mixture of the previous step,

wherein the wt .-% in the steps 3a) - 3d) being based on the total weight of the primer and the sum of the wt .-% is less than or equal 100th

For the preparation of the primer in step 3a) of the binder according to the invention or preferred embodiments thereof, 2-10 wt .-% of a

Bentonitgemisches fed. Preferably, the Bentonitegemisch 60 includes - 90 wt .-% of an organic solvent and 1-20% wt .-% Bentonite Bentonite selected from the group 34, 38 or combination of these bentonites. The Bentonitgemisch, in particular increase the mentioned preferred embodiments, in particular the stability of the primer. Furthermore, the Bentonitgemisch and preferred embodiments increases the physical stability of the primer on plastics and thus lead to an additional protective function.

to form in painting of plastic parts with automotive paints in the art prior to the application of the primer, a non-pigmented primer required a bonding agent. takes place in the known prior art by the primer on plastic parts no liability structure but the primers used to

to compensate for unevenness of the ground to be coated. In the prior art, the following steps were required

claims

Binders for coating plastics produced by a method comprising the steps of:

1) preparing a first intermediate product by a process comprising the steps of:

1 a) mixing and dissolving 5-45 wt .-% of a chlorinated

Polyolefin mixture in 50 to 99 wt .-% of a first organic solvent

1 b) heating the mixture from the previous step to a

Temperature between 65 ° C - 120 ° C for at least 30 min

1 c) feeding from 0.05 to 5 wt .-% of a modified silane mixture to the mixture from the previous step at a mixing temperature of 65 ° C - 120 ° C,

wherein the wt .-% in 1 a) - c 1) based on the total weight of the first intermediate product and the sum of the wt .-% is less than or equal to 100

2) processing the first intermediate product to the binder by a process comprising the steps of:

2a) mixing 5 to 40 wt .-% of a vinyl chloride-vinyl ether copolymer in 50 -90 wt .-% of a second organic solvent

2b) feeding from 10 to 80 wt .-% of the first intermediate product to the mixture of the previous step

2c) homogenizing the mixture from the previous step, wherein the percentages .-% in 2a) - refer 2c) to the total weight of the binder and the sum of the wt .-% is less than or equal 100th

A binder according to the preceding claim

characterized in that in step 1 a) 10 - wt .-% of the chlorinated polyolefin mixture in 80 20 - 90 wt .-% of the first mixed solvent and dissolved in step 1 c) 0 1 - 0.5 wt. -% of the modified silane mixture are fed to the mixture from step 1 b).

A binder according to any preceding claim

characterized in that the chlorinated polyolefin blend comprising one or more chlorinated polyolefins and includes resins, preferably selected from a group amino resins, epoxy resins and bisphenol A-epichlorohydrin resin.

A binder according to any preceding claim

characterized in that the chlorinated polyolefin blend a Hardlen ® comprises.

A binder according to any preceding claim

characterized in that the modified silane mixture comprising a modified epoxysilane preferably .beta. (3,4-epoxycyclohexyl) ethyltriethoxysilane.

A binder according to any preceding claim

characterized in that wt .-% of the vinyl chloride-vinyl ether copolymer in 40-60 wt .-% of the second organic in step 2a) 20-30

solvent are mixed, and in Step 2b) 10 - 30 wt .-% of the supplied first intermediate product to the mixture of step 2a).

A binder according to any preceding claim

characterized in that the vinyl chloride-vinyl ether copolymer, a vinyl chloride-isobutyl vinyl ether copolymer, particularly preferably a Laroflex ® MP binder.

A process for the preparation of a binder comprising the steps of:

1) preparing a first intermediate product by a process comprising the steps of:

1 a) mixing and dissolving 5-45 wt .-% of a chlorinated

Polyolefin mixture in 50 to 99 wt .-% of a first organic solvent

1 b) heating the mixture from the previous step to a

Temperature between 65 ° C - 120 ° C for at least 30 min

1 c) feeding from 0.05 to 5 wt .-% of a modified silane mixture to the mixture from the previous step at a mixing temperature of 65 ° C - 120 ° C,

wherein the wt .-% in 1 a) - c 1) based on the total weight of the first intermediate product and the sum of the wt .-% is less than or equal to 100

2) processing the first intermediate product to the binder by a process comprising the steps of:

2a) mixing 5 to 40 wt .-% of a vinyl chloride-vinyl ether copolymer in 50 -90 wt .-% of a second organic solvent

2b) feeding from 10 to 80 wt .-% of the first intermediate product to the mixture of the previous step

2c) homogenizing the mixture from the previous step, wherein the percentages .-% in 2a) - refer 2c) to the total weight of the binder and the sum of the wt .-% is less than or equal 100th

Primer for the coating of plastics produced by a process comprising

3a) mixing 10-30 wt .-% of a binder according to any one of claims 1-7, 2 - 10 wt .-% of a Bentonitgemisches

3b) adding 10-30 wt .-% of a pigment mixture to the mixture of the previous step

3c) adding 0.1 to 5 wt .-% of an additive mixture to the mixture of the previous step

3d) adding 10-50 wt .-% of a third organic

Solvent to the mixture of the previous step, wherein the wt .-% relate to the total weight of the primer and the sum of the wt .-% is less than or equal 100th

Primer for the coating of plastics according to the previous claim characterized in that the pigment mixture comprises chemical compounds selected from the group consisting of black paste, titanium dioxide, CALPEX or combinations of these.

Primer for the coating of plastics according to claim 9 or 10 characterized in that the additive mixture comprises chemical compounds selected from the group consisting of bisphenol A-epichlorohydrin resin, preferably Epitkote ™ and / or pyrogenic silica, preferably Aerosil ™.

Primer for coating plastics comprising

C1) from 10 to 30 wt .-% of the binder according to any one of claims 1-7 C2) 2-10 wt .-% of Bentonitgemisches

C3) 0.1 30 wt .-% of the pigment mixture

C4) 0.1 5 wt .-% of the additive mixture

C5) 10 50 wt .-% of the third organic solvent.

3. A process for coating of a plastic using a

The foundation according to any of claims 9-12 comprising the steps of:

4a) cleaning the plastic surface

4b) dilution of the primer in admixture with an organic solvent so that when the viscosity measured with a 4 mm cup according to DIN 5321 1 efflux times of 5 - 40 s achieved

4c) application of a layer thickness of 5 - 50 μιη the diluted base coat to the plastic preferably with the aid of an air pressure operated painting device.

4. Use of a binder according to any one of claims 1-7 or a primer according to any one of claims 9-12 for the coating of

Plastics is preferably selected from the group comprising polypropylene (PP), ethylene-propylene-diene rubber (PP-EPDM), expanded polypropylene (EPP), glass fiber reinforced plastic (GFRP), acrylonitrile-butadiene-styrene (ABS), polyamide (PA) , PA 6, polybutylene terephthalate (PBT) and polyvinyl chloride (PVC).

5. Use of a binder according to any one of claims 1-7 for

Producing a Einschichtlackes, a clear lacquer, a metallic coating or an adhesive.

16, plastic having an increased adhesion property producible by

Admixture of a binder according to any one of claims 1-7.