Patent ID: 6080816
Filing Date: 2000-06-27
Classification: C08F,C08G,C08K,C08L,C09D

Abstract:
A coating composition comprsing:component (I) comprising from 0 to 50 percent of the reaction product of a polyol of the formulaR.sup.1 --(OH).sub.mwithR.sup.2 --(SiYX.sub.2).sub.nthe reaction product heaving a weight average molecular weight less than about 10,000;component (II) comprising from 0 to 50 percent of a graft copolymer comprising a backbone of acrylic polymer and, grafted thereto, a plurality of substantially linear stabilizer arms containing at least about 2 percent of ethylenically unsaturated monomer with functionality that reacts with at least one of components I, III and V, the backbone being substantially insoluble and the stabilizer arms being substantially soluble in the composition;component (III) comprising from 0 to 30 of an alkylated melamine formaldehyde crosslinking agent;component (IV) comprising from 0 to 40 of an organic polyol polymer having a hydroxyl number of about 50 to 200 and a weight average molecular weight of about 1,000 to 20,000;component (V) comprising from 0 to 50 of a silane functional polymer which is the reaction product of about 5 to 70 percent by weight of ethylenically unsaturated silane-containing monomers selected from the group consisting of alkoxysilane monomers, acyloxysilane monomers, and mixtures thereof, with about 30 to 95 percent by weight of ethylenically unsaturated non-silane containing monomers selected from the group consisting of styrene; alkyl acrylate and aklyl methacrylate where the alkyl groups have 1 to 12 carbon atoms; cycloaliphatic acrylates; cycloaliphatic methacryates; aryl acrylates; aryl methacrylates; acrylamide; methacrylamide; acrylonitrile; methacrylonitrile; hydroxyalkyl acrylates and hydroxy alkyl methacrylates where the alkyl group has 1 to 4 carbon atoms; and mixtures thereof;component (VI) comprising from 0 to 50 percent of the reaction product of a polyol of the formulaR.sup.3 --(OH).sub.pwith an alkoxysilane of the formulaO.dbd.C.dbd.N--(CH.sub.2).sub.t --SiR.sup.4 (OR.sup.5).sub.2wherein:R.sup.1 is selected from the group consisting ofa) C.sub.2 to C.sub.20 alkyl; cycloaliphatic or aromatic rings, each optionally substituted with at least one member selected from the group consisting of O, N, P and S;b) two or more cycloaliphatic or aromatic rings connected to each other through a covalent bond, or through an alkylene group of 1 to 5 carbon atoms, or through a heteroatom, or fused together to share two or more carbon atoms, each optionally substituted with a member selected from the group consisting of O, N, P and S; andc) linear polyester, branched polyester, linear and branched polyester, polyether, polycarbonate, polyurethane, polyacrylate, polyolefin, or polyamide, each such group having a weight average molecular weight between about 300 and 10,000;R.sup.2 is selected from the group consisting ofa) C.sub.1 to C.sub.20 allkyl, cycloaliphatic or aromatic rings, each optionally substituted with a member selected from the group consisting of O, N, P and S; andb) two or more cycloaliphatic or aromatic rings connected to each other through a covalent bond, or through an alkylene group of 1to 5 carbon atoms, or through a heteroatom, or fused together to shaere two or more carbon atoms, each optionally substituted with a member selected from the group consisting of O, N, P and S;R.sup.3 is selected from tlhe group consisting ofa) C.sub.2 to C.sub.20 alkyl, cycloaliphatic or aromatic rings, each optionally substituted with a member selected from the group consisting of O, N, P and S;b) two or more cycloaliphatic or aromatic rings, each connected to each other through a covalent bond, or through an alkylene group of 1 to 5 carbon atoms, or through a heteroatom, or fused together to share two or more carbon atoms, each optionally substituted with a member selected from the group consisting of O, N, P and S; andc) linear polyester, branched polyester, linear and branched polyester, polyether, polycarbonate, polyurethane, polyacrylate, polyolefin, or polyamide, each such group having a weight average molecular weight of less than 3,000;R.sup.4 is selected from the group consisting of alkyl of 1 to 12 carbon atoms, alkoxy containing 1 to 4 carbon atoms;R.sup.5 is selected from the group consisting of alkyl of 1 to 12 carbon atoms;X is independently selected from the group consisting of alkoxy containing 1 to 20 carbon atoms, acyloxy containing 1 to 20 carbon atoms, phenoxy, halogens, amine, amide, urea, imidazole, carbamate, ketoximine, and oxazolidinone;Y is selected from the group consisting of alkyl of 1 to 12 carbon atoms, alkoxy containing 1 to 20 carbon atoms, acyloxy containing 1 to 20 carbon atoms, phenoxy, halogen, amine, amide, urea, imidazole, carbamate, ketoximine, and oxazolidinone;m is a positive integer of 2 or higher; andn is a positive integer of 1 or higher;p is a positive integer of 2 or higher; andt is a positive integer of 1 to 8;wherein I.noteq.VI and 5 to 75 percent by weight of the composition is one or both of the components I and VI, remainder being one or more of the components II to V such that the sum of the percentages of the components I-VI is 100 percent and wberein all the weight percentages are based on the total weight of the components I to V.