DESC:FIELD OF THE INVENTION
[001] The present disclosure relates to coating material. Particularly, the present disclosure relates to a coating material adapted to get adhered to a surface to facilitate the repulsion of foreign particles including dust or mud, water or any other foreign particle from the surface.

BACKGROUND OF THE INVENTION
[002] The information in this section merely provides background information related to the present disclosure and may not constitute prior art(s) for the present disclosure.

[003] In rainy and winter seasons, many automotive vehicles are faced with severe issues related to the accumulation of foreign particles like mud, snow, and water on an automobile's components’ surface, resulting in low visibility for the driver. One of the reasons for the low visibility for the driver is caused due to the lack of illuminance of the headlamps. Headlamps along with rear lamps, and indicators are one of important components for guiding drivers to safe driving on the roads at night and in bad weather conditions.

[004] In addition to this, other safety features of the automobile related to the visibility of the driver are also a major concern while driving/riding at night and in extreme weather conditions. Headlamp illuminance, side mirror visibility, and tail lamp focus are majorly depressed in extreme weather conditions, such as, but are not limited to the heavy rainy season and tropical cyclone days. During tough climatic conditions, dust particles and mud solutions gets stuck on the headlamps, side mirrors, and tail lamps which reduces visibility and results in difficulty in driving.

[005] There are several technologies available in the market such as wipers, ceramic coatings, polymer coatings, etc. Traditional coating materials are also available for automobile components that protect the surface with external factors like UV light, and chemicals but fail to repel mud solutions, cemented dust, or any other foreign particles due to their lower surface energy and smooth coating surface.

[006] Also, these solutions cannot be used for transparent surfaces. A need has arisen considering the above-mentioned challenges to protect against extreme factors.
[007] Some already existing solutions facilitating the protection of automobiles from extreme factors are provided.

[008] US20190153261A1 discloses a bird-repellent coating material that consists of a microencapsulated aqueous solution and dispersions of a visual repellent. The microencapsulated volatile olfactory repellent against birds and a powder of a visual repellent against birds is incorporated into an aqueous resin vehicle. They used an ultraviolet-reflecting agent and an ultraviolet-absorbing fluorescent agent.

[009] US20180148594A1 discloses a polymer coating for dirt-repellent applications. These polymer coatings are more related to the aqueous dispersions or polymer powders that are re-dispersible in water. This polymer coating consists of ethylene based unsaturated monomers containing acid groups, silane groups, and acrylates groups. The polymer coating relates to polymers based on acrylic esters in the form of aqueous dispersions or water re-dispersible powders, their methods of making, and aqueous coating media comprising the aforementioned polymers and their use in the production of dirt-repellent coatings.

[010] US20120024312A1 discloses a coating that repels dust. The compositions comprise the coating as a colloidal silica suspended in a low molecular weight alcohol, one or more hard nanoparticles, a fluoride source, and one or more combustible organic compounds. Methods of preparing a coating from the compositions are also provided herein. More specifically, the composition comprises colloidal silica, for example, a chain-structured silica organosol suspended in a low molecular weight alcohol or a fumed silica suspended in a low molecular weight alcohol, one or more hard nanoparticles, for example, titania or zirconia nanoparticles, and one or more combustible organic compounds.

[011] EP0754738A1 discloses a water-repellent composition having fluorocarbon polymer coating composition, and coating film therefrom. The water-repellent composition relates to a composition containing fluorocarbon polymer powder, to a coating composition containing fluorocarbon polymer powder and a binder dispersing the powder, and to a coating film made therefrom. Here, the fluorocarbon polymer powder may be at least one selected from the group consisting of polyvinylidene fluoride, polytetrafluoroethylene, acrylic silicone resin, polyester resin, epoxy resin, and mixtures thereof. The additive may be at least one substance selected from a fluoro oil, surfactant, and mixtures thereof. The fluoro oil may be at least one of the perfluorinated polyether and perfluorinated alkyl polyether.

[012] Above stated solutions are there for water-repellent, bird-repellent, and dust-repellent properties but none of them can be used for transparent surfaces. So, a coating is desired for automobile components and more particularly for transparent materials of the automobile such as headlamps, tail lamps, indications, and mirrors to maintain transparency and reflectiveness of the surfaces.

[013] The drawbacks/difficulties/disadvantages/limitations of the conventional techniques explained in the background section are just for exemplary purposes and the disclosure would never limit its scope only such limitations. A person skilled in the art would understand that this disclosure and below mentioned description may also solve other problems or overcome the other drawbacks/disadvantages of the conventional arts which are not explicitly captured above

SUMMARY OF THE INVENTION
[014] This summary is provided to introduce a selection of concepts, in a simplified format, that are further described in the detailed description of the invention. This summary is neither intended to identify key or essential inventive concepts of the invention nor is intended for determining the scope of the invention.

[015] The present disclosure relates to an organic-inorganic transparent polymeric coating for thermoplastics, glass, wood, and metal substrates. The organic-inorganic transparent polymeric coating is further related to the formation of functional coating more specifically for headlamp lenses, side glass mirrors, and tail lamps for mud-repellent and having repellent characteristics for any other foreign particle. The organic-inorganic transparent polymeric coating includes an organic phase and an inorganic phase. The organic phase includes polyurethane dispersion modified with acrylate elements which inherently have superior adhesion properties required for the coating material. In addition, the inorganic phase includes silanes such as colloidal silanes, micro amorphous silanes, and hydrophobic silanes incorporated into the organic phase for enhancing a nano-textured surface of the coating.

[016] To further clarify the advantages and features of the present disclosure, a more particular description of the disclosure will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the disclosure and are therefore not to be considered limiting of its scope. The disclosure will be described and explained with additional specificity and detail with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS
[017] These and other features, aspects, and advantages of the present invention will become better understood when the following detailed description is read with reference to the accompanying drawings in which like characters represent like parts throughout the drawings, wherein:

[018] Figure 1 illustrates an organic-inorganic transparent polymeric coating composition adapted to be applied on a surface of an automobile component to facilitate the repulsion of foreign particles including dust, mud, water, or any other foreign particle, according to an embodiment of the present disclosure.

[019] Figure 2 illustrates process flow chart used for synthesis process.
[020] Figure 3 illustrates results of the mud test on lamp lenses.

[021] Figure 4 illustrates results of coating on lamp lenses and side mirrors.

[022] Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have necessarily been drawn to scale. For example, in terms of the construction of the device, one or more components of the device may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

[023] ABBREVIATIONS:
PC: Polycarbonate
PMMA: Poly methyl methacrylate
HBPU: Hyperbranched polyurethane
IPDI: Isophorone diisocyanate
HEA: 2-Hydroxyethyl acrylate
FHBPUA: Flexible Hyperbranched polyurethane Acrylate
CA: Contact angle
IPA: Isopropyl alcohol
TEOS: Tetraethyl orthosilicate
PDMS: Polydimethylsiloxane
DMDMS: Di Methyl Di Methoxy Silane
MTMS: Methyl Tri Methoxy Silane
GPTMS: 3-glycidoxypropyl-trimethoxysilane

DETAILED DESCRIPTION OF THE INVENTION
[024] For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated system, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.

[025] It will be understood by those skilled in the art that the foregoing general description and the following detailed description are explanatory of the invention and are not intended to be restrictive thereof.

[026] Reference throughout this specification to “an aspect”, “another aspect” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrase “in an embodiment”, “in another embodiment” and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

[027] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a nonexclusive inclusion, such that a process or method that comprises a list of steps does not include only those steps but may include other steps not expressly listed or inherent to such process or method. Similarly, one or more devices or subsystems or elements or structures or components proceeded by "comprises... a" does not, without more constraints, preclude the existence of other devices or other sub-systems or other elements or other structures or other components or additional devices or additional sub-systems or additional elements or additional structures or additional components.

[028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The system, methods, and examples provided herein are illustrative only and not intended to be limiting.

[029] It should be understood at the outset that although illustrative implementations of the embodiments of the present disclosure are illustrated below, the present invention may be implemented using any number of techniques, whether currently known or in existence. The present disclosure should in no way be limited to the illustrative implementations, drawings, and techniques illustrated below, including the exemplary design and implementation illustrated and described herein, but may be modified within the scope of the appended claims along with their full scope of equivalents.

[030] The term “some” as used herein is defined as “none, or one, or more than one, or all.” Accordingly, the terms “none,” “one,” “more than one,” “more than one, but not all” or “all” would all fall under the definition of “some.” The term “some embodiments” may refer to no embodiments or to one embodiment or to several embodiments or to all embodiments. Accordingly, the term “some embodiments” is defined as meaning “no embodiment, or one embodiment, or more than one embodiment, or all embodiments.”

[031] The terminology and structure employed herein is for describing, teaching, and illuminating some embodiments and their specific features and elements and do not limit, restrict, or reduce the spirit and scope of the claims or their equivalents.

[032] Reference is made herein to some “embodiments.” It should be understood that an embodiment is an example of a possible implementation of any features and/or elements presented in the attached claims. Some embodiments have been described for the purpose of illuminating one or more of the potential ways in which the specific features and/or elements of the attached claims fulfil the requirements of uniqueness, utility, and non-obviousness.

[033] Use of the phrases and/or terms such as but not limited to “a first embodiment,” “a further embodiment,” “an alternate embodiment,” “one embodiment,” “an embodiment,” “multiple embodiments,” “some embodiments,” “other embodiments,” “further embodiment”, “furthermore embodiment”, “additional embodiment” or variants thereof do NOT necessarily refer to the same embodiments. Unless otherwise specified, one or more particular features and/or elements described in connection with one or more embodiments may be found in one embodiment, or may be found in more than one embodiment, or may be found in all embodiments, or may be found in no embodiments. Although one or more features and/or elements may be described herein in the context of only a single embodiment, or alternatively in the context of more than one embodiment, or further alternatively in the context of all embodiments, the features and/or elements may instead be provided separately or in any appropriate combination or not at all. Conversely, any features and/or elements described in the context of separate embodiments may alternatively be realized as existing together in the context of a single embodiment.

[034] In an aspect of the present invention, the inorganic phase is chemically or physically dispersed into the organic phase without hindering the adhesion and transparency of the organic phase. The inorganic phase is inherently superhydrophobic when modified with the organic phase. The organic phase having functional mud and dust-repellent properties maintains the inherent coating properties. During functional application, the inorganic phase plays an important role as it enhances a surface contact angle, whereas the organic phase will keep the coating properties as per the standards.
[035] The term “Contact angle” is defined as the angle between a liquid surface and a solid surface where they meet.
[036] Inorganic substances like silanes are hydrophobic in nature and can enlarge the contact angle by affecting the wetting behavior of the surface. Also, Silanes increase the contact angle by creating a heterogeneous surface with contact-angle hysteresis.
[037] The term “Tack-free time” is defined as the point at which the surface feels dry.
[038] In an embodiment of the present invention, surface coating with organic-inorganic transparent polymeric coating achieves the contact angle in the range of 95-107°.

[039] In another embodiment of the present invention, surface coating with organic-inorganic transparent polymeric coating achieves the Tack-free time in the range of 45-60 minutes at room temperature.

[040] In other embodiments, the organic phase further comprises acrylates-based monomeric segments polymerized with urethane monomeric units.

[041] In other embodiments, the inorganic groups are polymerized in the presence of a Polyurethane acrylate coating system.

[042] In another embodiment the organic-inorganic transparent polymeric coating described herein possesses unique surface chemistry, which helps adhesion on different substrates viz. thermoplastic, metal, and glass surfaces.

[043] In an embodiment, the present invention provides a transparent polymeric coating composition (100) comprising an organic phase (102) adapted to get adhered to a surface to be coated and an inorganic phase (104) adapted to disperse within the organic phase and enhances a surface contact angle.
[044] In another embodiment of the present invention, the organic phase of the polymeric coating composition comprises aliphatic polyols, aliphatic and aromatic isocyanate, and Aliphatic and aromatic acrylates.
[045] In another embodiment of the present invention, the organic phase of the polymeric coating composition comprises silanes selected from group consisting of colloidal silanes, micro amorphous silanes, and super hydrophobic silanes, or a combination thereof.

[046] In another embodiment of the present invention, the organic phase of the polymeric coating composition comprises Aliphatic polyols: Aliphatic and aromatic isocyanates: Aliphatic and aromatic Acrylates in a ratio in the range of 0.1 to 2: 1.1 to 3: 0.05 to 1.

[047] In another embodiment of the present invention, the Aliphatic polyols are selected from Polyester polyol and Polyether Polyols; Aliphatic and aromatic isocyanates are selected from Toluene diisocyanate (TDI), Methylene diphenyl diisocyanate (MDI) and Hexamethylene diisocyanate (HMDI); Aliphatic and aromatic Acrylates are selected from Butyl Acrylate and Vinyl Acrylates.

[048] In another embodiment of the present invention, the inorganic phase comprises Colloidal Silanes present in the range of 0.1 to 30%, Micro amorphous Silanes in the range of 0.1 to 30% and Super-hydrophobic Silanes in the range of 0.1 to 30%.

[049] In another embodiment, the present invention provides a method for preparing a transparent coating composition the method comprising dispersing the inorganic phase in the organic phase to form an organic-inorganic transparent polymeric coating composition.

[050] In another embodiment, the present invention provides a method of applying a organic-inorganic transparent polymeric coating composition (100) to the surface to be coated (200) comprising steps of:
• providing an organic phase (102) comprising: aliphatic polyols, aliphatic and aromatic isocyanates, and aliphatic and aromatic acrylates;
• providing an inorganic phase (104) comprising: colloidal silanes, micro amorphous silanes, and hydrophobic silanes;
• dispersing the inorganic phase in the organic phase to form an organic-inorganic transparent polymeric coating composition;
• applying a coat of the transparent polymeric coating composition to the surface; and
• curing the applied coat of transparent polymeric coating composition by treatment methods selected from the group of thermal treatment and ultraviolet treatment.

[051] In another embodiment of the present invention, the coat of transparent polymeric coating composition (100) is applied by a process selected from spray process, free-flowing process, and dip process.

[052] In another embodiment of the present invention, the coat of transparent polymeric coating composition is applied to a surface (200) of an automobile component.

[053] The disclosed organic-inorganic transparent polymeric coating composition 100 is used to coat glass, thermoplastics, wood, and metal surfaces. The organic-inorganic transparent polymeric coating composition 100 may be termed as coat of transparent polymeric coating composition or foreign particle-repellent polymer coating composition throughout this description. In addition, the functional coating with mud, dust, and water repellent characteristics, while maintaining required coating properties are as per the international standards. No external source is required to remove the stuck mud, dust, or water from the surface of the coating making the process easy and efficient. Further, the polymeric coating can be easily coated with the spray, free-flowing, and dip process. Furthermore, moisture curing is applicable to the coating making it universally applicable. For reducing the curing time, UV and thermal curing may be applicable. All types of curing mechanisms may be used due to the familiar chemical compositions for each curing technique.
[054] Embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings.

[055] Referring to FIGURE 1. an organic-inorganic transparent polymeric coating 100 for thermoplastics, glass, wood, and metal substrates is shown. The organic-inorganic transparent polymeric coating composition 100 is more particularly related to the formation of identical chemical compositions for different substrates. The organic-inorganic transparent polymeric coating composition 100 is further related to the formation of functional coating more specifically for headlamp lenses, side glass mirrors, and tail lamps for mud-repellent characteristics. As shown in FIGURE 1, the organic-inorganic transparent polymeric coating composition 100 includes an organic phase 102 defining a base and adapted to contact a surface of an automobile component and an inorganic phase 104 adapted to disperse within the organic phase 102. The organic phase 102 includes polyurethane dispersion modified with acrylate elements which inherently have superior adhesion properties required for the coating material. In addition, the inorganic phase 104 includes silanes such as colloidal silanes, micro amorphous silanes, and super hydrophobic silanes, or a combination of these silicane groups incorporated into the organic phase 102 for enhancing a nano-textured surface of the organic-inorganic transparent polymeric coating composition 100. The nano size usage of the silicane groups or the combination of these groups enhances the textured layer enabling the repulsion of foreign elements such as dust, and water, from the surface to be coated 200. The inorganic phase 104 is chemically or physically dispersed into the organic phase 102 without hindering the adhesion and transparency of the organic phase 102. The inorganic phase 104 is inherently superhydrophobic when modified with the organic phase 102. The organic phase 102 having functional mud and dust repellent properties enhances with maintaining the inherent coating properties. During functional application, inorganic phase 104 plays an important role as it enhances a surface contact angle, whereas organic phase 102 will keep the coating properties as per the standards. The organic-inorganic transparent polymeric coating composition 100 having the organic phase 102 and the inorganic phase 104 is adapted to be disposed over the surface to be coated 200 to facilitate the repulsion of the foreign particles from the surface.

[056] Along with protective and decorative aspects, the organic-inorganic transparent polymeric coating composition 100 serves functional aspects, such as self-cleaning by repelling the mud, dust, and water from the coated surface. In addition, the organic-inorganic transparent polymeric coating composition 100 may be applied on headlamp illuminance, weakened tail lamp indications, and side mirrors making them repellent from foreign particles and improving visibility during night driving, rainy season, and off-road driving conditions.

[057] The presence of the inorganic phase 104 facilitates the repulsion of mud, dust, and water from the coating. The organic-inorganic transparent polymeric coating composition 100 can be prepared by the traditional polymerization process and need not change any polymerization setup. On the other hand, the acrylate-based coating gives higher glossiness and transparency and its chemical combination with polyurethane makes it moisture curable. The additional benefits of the organic-inorganic transparent polymeric coating composition 100 are thermal and UV curing mechanisms that can be used for reducing the curing time.

[058] The formulated organic phases 102 are prepared with a chemical reaction of several aliphatic polyol monomers and aliphatic/aromatic isocyanates monomers modified with acrylate monomers. The sol-gel process is used to modify the silane-based inorganic phase 104 to the urethane-based organic phase 102. The organic-inorganic transparent polymeric coating composition 100 can be done using the spray, dip, and free flow methods.

[059] The molar ratios of the constituents of organic phase is given in Table 1.
Materials Used in Organic Phase Monomer Ratios
Aliphatic polyols 0.1-2.00
Aliphatic and aromatic isocyanates 1.1-3.00
Aliphatic and aromatic Acrylates 0.05-1.00
TABLE 1. The material used in the organic phase

Referring to Table 1. The organic phase 102 includes Aliphatic polyols, Aliphatic and aromatic isocyanates, and Aliphatic and aromatic Acrylates. The Aliphatic polyols present in the organic phase 102 facilitate the curing of the organic-inorganic transparent polymeric coating composition 100 after the application on the surface to be coated 200.

[060] The percentage composition of inorganic phase is given in Table 2.
Inorganic Phase Percentages to Organic Phases
Colloidal Silanes 0.1-30%
Micro amorphous Silanes 0.1-30%
Super-hydrophobic Silanes 0.1-30%
TABLE 2: The material used in the inorganic phase

Referring to Table. 2. The inorganic phase 104 includes colloidal silanes, micro amorphous silanes, and hydrophobic silanes either as a separate element or in combination having a predefined concentration in the inorganic phase 104 to facilitate the formation of the organic-inorganic transparent polymeric coating composition 100.

[061] In one of the embodiments, the inorganic phase 104 includes a silane group which is incorporated into the polymerized coating material to enhance the nanotextured surface on the coated surface to get mud, dust, and water-repellent properties. The nanotextured surface of the inorganic phase 104 facilitates improving the contact angle of the inorganic phase 104 facilitating improved repulsion of external materials on the organic-inorganic transparent polymeric coating composition 100. As an example, the inorganic phase 104 improves the contact angle of the organic-inorganic transparent polymeric coating i.e. 100 to 130 degrees for non-transparent materials and up to 120 degrees for transparent materials thereby facilitating improved repulsion for the foreign particles.

[062] The organic-inorganic transparent polymeric coating composition 100 having nanomaterial in the inorganic phase 104 is transparent in nature which will be the useful in majority of transparent substrates like headlamp lenses, glass mirrors, and nano hydrophobic hard coating. The organic-inorganic transparent polymeric coating composition 100 protects against UV light, chemicals, moisture, etc. The organic-inorganic transparent polymeric coating 100 is thermally cured and requires a specific temperature to get completely cured. The organic-inorganic transparent polymeric coating composition 100 is polyurethane acrylate organic phase-based transparent coating composition 100 with functional coating properties enhanced with inorganic materials containing silane groups. The organic-inorganic transparent polymeric coating composition 100 may be applied by the spray process, free-flowing process, and dip process with UV, thermal, and moisture curing mechanism, thereby no additional equipment cost is required in the automobile industry. The advantageous part of the organic-inorganic transparent polymeric coating composition 100 is that with similar chemical compositions, different substrates can be coated such as plastics, glass, and metals. The curing and tack-free time vary with respect to the curing mechanism.

[063] In another embodiment, the present invention provides a method of applying a transparent polymeric coating composition 100 to the surface to be coated 200 comprising steps of:
• providing an organic phase 102 comprising aliphatic polyols, aliphatic and aromatic isocyanates, and aliphatic and aromatic acrylates;
• providing an inorganic phase 104 comprising colloidal silanes, micro amorphous silanes, and hydrophobic silanes;
• dispersing the inorganic phase 104 in the organic phase 102 to form an organic-inorganic transparent polymeric coating composition 100;
• applying a coat of the organic-inorganic transparent polymeric coating composition 100 to the surface to be coated 200; and
• curing the applied coat of transparent polymeric coating composition 100 by treatment methods from the group of thermal treatment or ultraviolet treatment.

[064] In this manner, the organic-inorganic transparent polymeric coating composition 100 is a self-cleanable mud-repellent coating. The drag force of the vehicle will also help to remove the stuck mud from the surface. The repellent mechanism is based on the surface chemistry of the applied organic-inorganic transparent polymeric coating composition 100. The organic-inorganic transparent polymeric coating composition 100 with curing will form a nano-size textured surface on the outer layer of the headlamp, the glass mirror, and the tail lamps. This textured surface does not allow water, mud, or dust to stick on the surface due to its super hydrophobic properties such as that of a lotus leaf. The nano-textured surface layer has different advantages such as it does not allow water droplets to stay on the surface by creating a higher contact angle of that water droplet on the surface. The inorganic particles help to repel mud and dust particles as it enhances the textured surface in the organic-inorganic transparent polymeric coating composition 100.

[065] The advantages of the organic-inorganic transparent polymeric coating composition 100 are now explained. The disclosed organic-inorganic transparent polymeric coating composition 100 unique surface chemistry is used to coat glass, thermoplastics, wood, and metal surfaces. In addition, the functional organic-inorganic transparent polymeric coating composition 100 with mud, dust, and water repellent characteristics with maintaining required coating properties are as per the international standards. No external source is required to remove the stuck mud, dust, or water from the surface of the organic-inorganic transparent polymeric coating composition 100 making the process easy and efficient. Further, the organic-inorganic transparent polymeric coating composition 100 can be easily coated with the spray, free-flowing, and dip process. Furthermore, moisture curing applies to the organic-inorganic transparent polymeric coating composition 100 making it universally applicable. For reducing the curing time, UV and thermal curing may be applicable. All types of curing mechanisms may be used due to the familiar chemical compositions for each curing technique.
[066] It is to be understood that the embodiments of the invention disclosed herein are illustrative of the principles of the present invention. Other modifications that may be employed are within the scope of the invention. Thus, by way of example, but not of limitation, alternative configurations of the present invention may be utilized in accordance with the teachings herein. Accordingly, the present invention is not limited to that precisely as shown and described in the examples provided below. The examples may be understood well upon reffering Figure 2.

[067] Example 1:
Hybrid Formulation including Organic – Inorganic Composition
1. Methyl Methacrylate MMA (Acrylate Monomer)
2. ditin butyl dilaurateDBTDL (Catalyst)
3. Isophorone diisocyanate (IPDI) (Monomer-1)
4. Functionalised Thiolated Tetraethoxisilane
5. Polypropylene Glycol 1000 (Polyether Polyols)
6. 1,4-Butanediol (BDO)
7. Dihydroxymethylpropionic acid (DMPA)
8. Potassium persulfate (KPS)

[068] Procedure: In flask, solution-A prepared with 20-30 parts of IPDI and 60-80 parts of PPG 1000 were stirred at 80-90? for 2-3 hours. Then 2-5 parts of DMPA, and 3-7 parts of BDO were added for next 2 hours and reaction cooled down at 40?. The solution-A emulsion was obtained after emulsifying for 1 h with deionized water under vigorous stirring. In another chamber, MMA, deionised water, solution-A emulsion and Functionalised Thiolated Tetraethoxisilane were added into a four-necked flask equipped with a thermometer, mechanical stirrer and condenser. After 20 min, KPS (dissolved with deionized water) was added and stirred for 10 min, and then pre-emulsion was obtained by filtration. The reaction temperature maintained at 80-90 ? and reaction is carried out for 3-4 hours. Finally composition is filtered and used for coating application.
[069] Example 2:
Hybrid formulation including Organic-Inorganic compositions.
1. Hydroxyethyl Methacrylate HEMA (Acrylate Monomer)
2. ditin butyl dilaurate DBTDL (Catalyst)
3. Isophorone diisocyanate (IPDI) (Monomer-1)
4. Functionalised Thiolated Polydimethgylsiloxane
5. Purified castor oil based polyol (Polyether Polyols)
6. 1,4-Butanediol (BDO)
7. Dihydroxymethyl propionic acid (DMPA)
8. Potassium persulfate (KPS).
[070] Procedure: In flask, solution-A prepared with 20-30 parts of IPDI and 70-90 parts of Purified castor oil based polyol were stirred at 80-90? for 2-3 hours. Then 2-5 parts of DMPA, and 3-7 parts of BDO were added for next 2 hours and reaction cooled down at 40?. The solution-A emulsion was obtained after emulsifying for 1 h with deionized water under vigorous stirring. In another chamber, HEMA, deionised water, solution-A emulsion and Functionalised Thiolated Tetraethoxisilane were added into a four-necked flask equipped with a thermometer, mechanical stirrer and condenser. After 20 min, KPS (dissolved with deionized water) was added and stirred for 10 min, and then pre-emulsion was obtained by filtration. The reaction temperature maintained at 80-90 ? and reaction is carried out for 3-4 hours. Finally composition is filtered and used for coating application.
[071] The change in contact angle for various coated and non-coated surfaces is given in Table 3. Table 3 indicates the contact angle values for the developed coating for glass, PC and PMMA surfaces . It is found that the non coated surfaces show contact angle values 46 °, 78° and 70° which found lesser as comparted to the coated substrates. The contact value for coated glass, PC and PMMA substrates are 95 °, 101 °, 105° which showed increment in the substrates due to addition of inorganic phases. The inorganic silane phases are hydrophobic in nature which enhances the contact angle of the coated surfaces and repel the water, dust, dirt and foreign particles. The contact angle signifies that smooth and easy removal of the foreign particles from the substrates. The higher contact angle results in self-cleanable substrate.
Types of Substrate Non-Coated Coated % Improvement
Glass Surface 46 ° CA 95 ° CA 107%
PC Surface 78 ° CA 101 ° CA 32%
PMMA Surface 70 ° CA 105 ° CA 50%
Table 3. Contact angle data

[072] The assessment of organic-inorganic transparent polymeric coating is done using various tests as given in Table 4.
Transparency Specifications Status
Peel Off/Adhesion Hatching with 3M tape Pass
Scratch Resistance H/2H Pass
Mud Test Apply Mud On Lens Pass
Dust Test Dust Spray Test Pass
Water Resistance Immersion in 50 °C water for 240 hr Pass
Petrol Test Sprinkle petrol on outer surface of lens Pass
Engine Oil (SAE20 W 40) One minute wiping Pass
NC Thinner One minute wiping Pass
Gasoline (RON87) One minute wiping Pass
Gasoline (RON87 +15 % Ethanol) One minute wiping Pass
Water Spray Test As per JIS D 0203 Standard Pass
Thermal Shock Heating and Cooling Cycle Pass
Xenon Test Chamber 1500 hrs in Xenon Test Chamber Pass
Table 4. Nano Coating Trials- Testing and Validation Results

[073] The test results of assessment of organic-inorganic transparent polymeric coating on different surfaces is given in Table 5.
Sr. No Test Specification Remarks Pass/Failed
1. Thickness Dry Film Thickness PC: Bare: 780 Coated: 798.4
PMMA: Bare: 1416 Coated: 1436
Glass: Bare: N/A Coated: N/A Pass
2. Pencil Hardness H,2H,3H and 4 H Pencils Used PC: H: Pass 2H: Pass 3H: Pass H:Pass
PMMA: H: Pass 2H: Pass 3H: Pass H:Pass
Glass: H: Pass 2H: Pass 3H: Pass H:Pass Pass
3. Solvent Rub Test Isobutyl Methyl Ketone Solvent PC: (1 min rubbing): Pass
PMMA: (1 min rubbing): Pass
Glass: (1 min rubbing): Pass Pass
4. Peel Off/Adhesion Hatching with 3M Tape PC: Passed
PMMA: Failed
Glass: Pass PC/Glass: Pass

PMMA: Failed
5. Contact Angle Test ASTM D5946 PC: 101°
PMMA: 105 °
Glass: Pass: 95 ° Pass
6. Scratch Test Non-coated: Mark observed.
Hard coated: No mark observed.
Mud Repellant coated: No mark observed. Pass
Table 5. Shows the test results of various assessment test of organic-inorganic transparent polymeric coating on different surfaces.
H: Hard

[074] The developed coated substrates are tested for various coating properties as the ASTM standards. The pencil hardness results of coated panels showed 2H value and found higher as compared to the non-coated surface. In water dip test, it is found that coating was intact with the surface and no removal of coating observed. The adhesion of the coating to the substrates found excellent and no film peel off was noticed during testing. In solvent rub test, the substrates has been analysed with petrol, gasoline, engine oil and coated sample showed excellent resistance to chemicals. This indicates that for automotive application, coated substrates are showing excellent resistance to chemicals where water and chemical resistance is required for exterior and outdoor application.
[075] While specific language has been used to describe the present disclosure, any limitations arising on account thereto, are not intended. As would be apparent to a person in the art, various working modifications may be made to the method to implement the inventive concept as taught herein. The drawings and the foregoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. ,CLAIMS:1. A transparent polymeric coating composition (100) comprising:
• an organic phase (102) adapted to get adhered to a surface to be coated; and
• an inorganic phase (104) adapted to disperse within the organic phase (102) and enhances a surface contact angle.
2. The transparent polymeric coating composition (100) as claimed in claim 1, wherein the organic phase comprises aliphatic polyols, aliphatic and aromatic isocyanate, and Aliphatic and aromatic acrylates.
3. The transparent polymeric coating composition as claimed in claim 1, wherein the inorganic phase comprises silanes selected from group consisting of colloidal silanes, micro amorphous silanes, and super hydrophobic silanes, or a combination thereof.
4. The transparent polymeric coating composition as claimed in claim 1, wherein the organic phase comprises Aliphatic polyols: Aliphatic and aromatic isocyanates: Aliphatic and aromatic Acrylates in a ratio in the range of 0.1 to 2: 1.1 to 3: 0.05 to 1.
5. The transparent polymeric coating composition as claimed in claim 4, wherein the Aliphatic polyols are selected from Polyester polyol and Polyether Polyols; Aliphatic and aromatic isocyanates are selected from Toluene diisocyanate (TDI), Methylene diphenyl diisocyanate (MDI) and Hexamethylene diisocyanate (HMDI); Aliphatic and aromatic Acrylates are selected from Butyl Acrylate and Vinyl Acrylates.
6. The transparent polymeric coating composition as claimed in claim 1, wherein the inorganic phase comprises Colloidal Silanes present in the range of 0.1 to 30%, Micro amorphous Silanes in the range of 0.1 to 30% and Super-hydrophobic Silanes in the range of 0.1 to 30%.
7. A method for preparing a transparent polymeric coating composition as defined in Claims 1 to 5 said method comprising dispersing the inorganic phase in the organic phase to form an organic-inorganic transparent polymeric coating composition.
8. A method of applying a transparent polymeric coating composition (100) to the surface to be coated (200) comprising steps of:
a. providing an organic phase (102) comprising: aliphatic polyols, aliphatic and aromatic isocyanates, and aliphatic and aromatic acrylates;
b. providing an inorganic phase (104) comprising: colloidal silanes, micro amorphous silanes, and hydrophobic silanes;
c. dispersing the inorganic phase (104) in the organic phase (102) to form an organic-inorganic transparent polymeric coating composition;
d. applying a coat of the organic-inorganic transparent polymeric coating composition to the surface; and
e. curing the applied coat of transparent polymeric coating composition by treatment methods selected from the group of thermal treatment or ultraviolet treatment.
9. The method as claimed in claim 8, wherein the coat of transparent polymeric coating composition (100) is applied by a process selected from spray process, free-flowing process, and dip process.
10. The method as claimed in claim 8, wherein the surface (200) is a surface of an automobile component.