Patent ID: 7001952

Claim:
A thermosetting composition comprising: (I) a first reactant comprising reactive functional groups; (II) a curing agent having functional groups reactive with the functional groups of the first reactant in (I); (III) a latex emulsion comprising crosslinked polymeric microparticles dispersed in an aqueous continuous phase, the polymeric microparticles prepared from a monomer mix comprised of: (a) at least 20 weight percent of a crosslinking monomer having two or more groups of reactive unsaturation and/or monomers having one or more functional groups capable of reacting to form crosslinks after polymerization; (b) at least 2 weight percent of one or more polymerizable ethylenically unsaturated monomers having hydrophilic functional groups having the following structures (I) and/or (II): wherein A is selected from H and C 1 –C 3 alkyl; B is selected from —NR 1 R 2 , —OR 3 and —SR 4 , where R 1 and R 2 are independently selected from H, C 1 –C 18 alkyl, C 1 –C 18 alkylol and C 1 –C 18 alkylamino, R 3 and R 4 are independently selected from C 1 –C 18 alkylol, C 1 –C 18 alkylamino, —CH 2 CH 2 —(OCH 2 CH 2 ) n —OH where n is 0 to 30, and, —CH 2 CH 2 —(OC(CH 3 )HCH 2 ) m —OH where m is 0 to 30, D is selected from H and C 1 –C 3 alkyl; and E is selected from —CH 2 CHOHCH 2 OH, C 1 –C 18 alkylol, —CH 2 CH 2 —(OCH 2 CH 2 ) n —OH where n is 0 to 30, and —CH 2 CH 2 —(OC(CH 3 ) HCH 2 ) m —OH where m is 0 to 30; and (c) optionally, the balance comprised of one or more polymerizable ethylenically unsaturated monomers, wherein (a), (b) and (c) are different from each other; and (IV) an aqueous polyurethane dispersion, comprising polyurethane-acrylate particles dispersed in an aqueous medium, said particles comprising the reaction product obtained by polymerizing the components of a pre-emulsion formed from: (A) an active hydrogen-containing polyurethane acrylate prepolymer, comprising a reaction product obtained by reacting: (i) a polyol; (ii) a polymerizable, ethylenically unsaturated monomer containing at least one hydroxyl group; (iii) a compound comprising a C 1 –C 30 alkyl group having at least two active hydrogen groups selected from carboxylic acid groups and hydroxyl groups, wherein at least one active hydrogen group is a hydroxyl group; and (iv) a polyisocyanate; (B) one or more hydrophobic polymerizable ethylenically unsaturated monomers; and (C) a crosslinking monomer; wherein the active hydrogen functional polyurethane acrylate prepolymer of (A) includes at least 30 percent by weight of polyurethane acrylate prepolymer comprising one or more prepolymers having at least one terminal polymerizable site of ethylenic unsaturation, at one end of the molecule and at least one active hydrogen-containing group at the opposite end of the molecule; and at least 10 percent by weight of the polyurethane acrylate prepolymer comprising one or more prepolymers having at least one terminal polymerizable site of ethylenic unsaturation at each end of the molecule.