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Acetoacetylated polyvinyl polymers and curable coating compositions made therefromRelated Patent Categories: Synthetic Resins Or Natural Rubbers -- Part Of The Class 520 Series, Natural Rubber Compositions Having Nonreactive Materials (dnrm) Other Than: Carbon, Silicon Dioxide, Glass Titanium Dioxide, Water, Hydrocarbon, Halohydrocarbon, Ethylenically Unsaturated Reactant Admixed With A Preformed Reaction Product Derived From: (a) At Least One Polycarboxylic Acid, Ester, Or Anhydride; (b) At Least One Polyhydroxy Compound; And (c) At Least One Fatty Acid Glycerol Ester, Or A Fatty Acid Or Salt Derived From A Naturally Occurring Glyceride, Tall Oil, Or A Tall Oil Fatty Acid, At Least One Solid Polymer Derived From Ethylenic Reactants Only, Polymer Mixture Of Two Or More Solid Polymers Derived From Ethylenically Unsaturated Reactants Only; Or Mixtures Of Said Polymer Mixture With A Chemical Treating Agent; Or Products Or Processes Of Preparing Any Of The Above Mixtures, Treating Polymer Or Polymer Mixture With A Chemical Treating Agent Other Than Solid PolymerAcetoacetylated polyvinyl polymers and curable coating compositions made therefrom description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20060205882, Acetoacetylated polyvinyl polymers and curable coating compositions made therefrom. Brief Patent Description - Full Patent Description - Patent Application Claims
CROSS-REFERENCE TO RELATED APPLICATION [0001] This application claims priority under 35 U.S.C. .sctn.119 from U.S. Provisional Application Ser. No. 60/456,476 (filed Mar. 21, 2002), which is incorporated by reference herein as if fully set forth. FIELD OF INVENTION [0002] The present invention generally relates to coating compositions suitable for use in automotive applications and more particularly relates to wash primers having improved coating adhesion and hardness over conventional wash primers. BACKGROUND OF THE INVENTION [0003] In coating applications, especially automotive OEM (original equipment manufacturer) or refinish multi-coat systems, multiple layers of coating compositions are applied over metal substrates, such as an automotive body. Typically, the bare metal surface is coated with a wash primer, followed by a coating from a base coating composition, which is further coated with a clear coating composition. If desired, a coating from a primer composition may be applied over the wash primer coating before the application of the base coating composition. The adhesion strength and corrosion resistance of the coating resulting from the wash primer is important for the overall integrity of the multi-coat system. A conventional wash primer is a coating composition that typically includes a polyvinyl butyral dissolved in isopropyl alcohol. It typically also includes a corrosion inhibitor, such as zinc chromate, and an adhesion promoter, such as phosphoric acid that etches the metal surface to improve the adhesion of the primer to the underlying bare metal substrate surface. A layer of the wash primer is typically conventionally applied, such as by using a paint spray gun, to a typical film thickness of about 7.6 micrometers (0.3 mil) to 31 micrometers (1.2 mils), in contrast to a primer, which is typically applied to a film thickness of about 25.4 micrometers (1 mil) to 50.8 micrometers (2 mils) in OEM applications and up to 127 micrometers (5 mils) in refinish applications. Typically, a coating of a conventional primer coating composition is applied over the wash primer coating before additional coatings, such as base and clear coatings are applied. [0004] One of the major problems associated with such conventional wash primers is the presence of the conventional corrosion inhibitor, such as zinc chromate, which is toxic and has an adverse impact on the environment. Thus, attempts have been made to produce chromate free wash primers that equal or improve the corrosion resistance provided by chromate-containing conventional wash primers. [0005] The other problem associated with such conventional wash primers is the tendency of the coatings resulting therefrom to split when exposed to chipping action typically experienced by automotive coating systems. [0006] The chromate free coating compositions of the present invention are not only benign to the environment but they also provide improved chip resistance over conventional wash primers. STATEMENT OF THE INVENTION [0007] The present invention is directed to a curable composition comprising crosslinkable and crosslinking components wherein said crosslinkable component comprises: [0008] (a) an acetoacetylated polyvinyl polymer having the formula: wherein (m) ranges from about 1.5 mole percent to about 85 mole percent, (n) ranges from about 0 mole percent to about 20.5 mole percent, (p) ranges from about 12 mole percent to about 87 mole percent and (q) ranges from about 1 mole percent to about 88 mole percent, sum of (m), (n), (p) and (q) being 100 and wherein R.sub.1 and R.sub.2 are independently H, substituted or unsubstituted C.sub.1 to C.sub.12 alkyl, substituted or unsubstituted C.sub.6 to C.sub.14 aryl, substituted or unsubstituted C.sub.7 to C.sub.22 aralkyl, substituted or unsubstituted C.sub.6 to C.sub.14 alkaryl, substituted, unsubstituted C.sub.4 to C.sub.14 carbocyclyl or a combination thereof, said substituents being independently selected from the group consisting of C.sub.1 to C.sub.12 alkoxy, acyl, carboxyl, derivative of carboxyl, sulfonyl, derivative of sulfonyl, cyano, and halo; [0009] (b) an acetoacetylated polyvinyl polymer having the formula: wherein (m) ranges from about 1.5 mole percent to about 85 mole percent, (n) ranges from about 0 mole percent to about 20.5 mole percent, (p) ranges from about 12 mole percent to about 87 mole percent, (q) ranges from about 1 mole percent to about 88 mole percent and (x) ranges from about 0.5 to about 6 mole percent, sum of (m), (n), (p), (q) and (x) being 100 and wherein R.sub.1 and R.sub.2 are independently H, substituted or unsubstituted C.sub.1 to C.sub.12 alkyl, substituted or unsubstituted C.sub.6 to C.sub.14 aryl, substituted or unsubstituted C.sub.7 to C.sub.22 aralkyl, substituted or unsubstituted C.sub.6 to C.sub.14 alkaryl, substituted, unsubstituted C.sub.4 to C.sub.14 carbocyclyl or a combination thereof, and wherein Z is H, or --COOH and Y is --COOH, halo, unsubstituted phenyl or a combination thereof; said substituents being independently selected from the group consisting of C.sub.1 to C.sub.12 alkoxy, acyl, carboxyl, derivative of carboxyl, sulfonyl, derivative of sulfonyl, cyano, and halo; [0010] (c) a combination thereof; and [0011] wherein said crosslinking component comprises a polyamine, a polyketimine, polyepoxide, polyisocyanate, melamine, C.sub.1 to C.sub.12 alkyl dialdehyde, C.sub.1 to C.sub.12 alkyl poly(meth)acrylate, or a combination thereof. [0012] The present invention is also directed to a method of producing a multi-coat system on a substrate comprising: [0013] (i) mixing a crosslinkable component with a crosslinking component of a curable coating composition to form a pot mix, wherein said crosslinkable component comprises: [0014] (a) an acetoacetylated polyvinyl polymer having the formula: wherein (m) ranges from about 1.5 mole percent to about 85 mole percent, (n) ranges from about 0 mole percent to about 20.5 mole percent, (p) ranges from about 12 mole percent to about 87 mole percent and (q) ranges from about 1 mole percent to about 88 mole percent, sum of (m), (n), (p) and (q) being 100 and wherein R.sub.1 and R.sub.2 are independently H, substituted or unsubstituted C.sub.1 to C.sub.12 alkyl, substituted or unsubstituted C.sub.6 to C.sub.14 aryl, substituted or unsubstituted C.sub.7 to C.sub.22 aralkyl, substituted or unsubstituted C.sub.6 to C.sub.14 alkaryl, substituted, unsubstituted C.sub.4 to C.sub.14 carbocyclyl or a combination thereof, said substituents being independently selected from the group consisting of C.sub.1 to C.sub.12 alkoxy, acyl, carboxyl, derivative of carboxyl, sulfonyl, derivative of sulfonyl, cyano, and halo; [0015] (b) an acetoacetylated polyvinyl polymer having the formula: wherein (m) ranges from about 1.5 mole percent to 85 mole percent, (n) ranges from about 0 mole percent to 20.5 mole percent, (p) ranges from about 12 mole percent to about 87 mole percent, (q) ranges from about 1 mole percent to about 88 mole percent and (x) ranges from 0.5 to 6 mole percent, sum of (m), (n), (p), (q) and (x) being 100 and wherein R.sub.1 and R.sub.2 are independently H, substituted or unsubstituted C.sub.1 to C.sub.12 alkyl, substituted or unsubstituted C.sub.6 to C.sub.14 aryl, substituted or unsubstituted C.sub.7 to C.sub.22 aralkyl, substituted or unsubstituted C.sub.6 to C.sub.14 alkaryl, substituted, unsubstituted C.sub.4 to C.sub.14 carbocyclyl or a combination thereof, and wherein Z is H, or --COOH and Y is --COOH, halo, unsubstituted phenyl or a combination thereof; said substituents being independently selected from the group consisting of C.sub.1 to C.sub.12 alkoxy, acyl, carboxyl, derivative of carboxyl, sulfonyl, derivative of sulfonyl, cyano, and halo; or [0016] (c) a combination thereof; and [0017] wherein said crosslinking component comprises a polyamine, a polyketimine, polyepoxide, polyisocyanate, melamine, C.sub.1 to C.sub.12 alkyl dialdehyde, C.sub.1 to C.sub.12 alkyl poly(meth)acrylate, or a combination thereof; [0018] (ii) applying a pot mix layer over said substrate; [0019] (iii) applying a layer of base coating composition on said pot mix layer; [0020] (iv) applying a layer of clear coating composition on said layer of base coating composition to form a multi-layer system on said substrate; and Continue reading about Acetoacetylated polyvinyl polymers and curable coating compositions made therefrom... 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