Coating composition of an amine polymer and a blocked polyisocyanate

Claim 2

A coating composition comprising about 10-80% by weight of a binder and 20-90% by weight of an organic carrier; wherein the binder consists essentially of A. 30-90% by weight, based on the weight of the binder, of an amine polymer consisting essentially of polymerized ethylenically unsaturated monomers and polymerized constituent of the formula: ##STR7## where R 1 is H, or CH 3 , R 2 is an aliphatic group and R 3 is a cycloaliphatic group; wherein the polymer has a weight average molecular weight of about 2,000 to 50,000; and B. 10-70% by weight of a blocked organic polyisocyanate.

Claim 3

The coating composition of claim 1 in which R 2 is an aliphatic group containing 2 to 12 carbon atoms.

Claim 4

The coating composition of claim 2 in which R 3 is a cyclohexyl group.

Claim 5

The coating composition of claim 1 in which the ethylenically unsaturated monomers are selected from the group consisting of alkyl methacrylate, alkyl acrylate each having 1 to 12 carbon atoms in the alkyl group; hydroxy alkyl methacrylate, hydroxy alkyl acrylate each having 2 to 4 carbon atoms in the alkyl group, styrene, vinyl toluene, acrylamide, methacrylamide and any mixtures thereof.

Claim 6

The coating composition of claim 1 containing pigments in a pigment to binder weight ratio of about 1/100 to 100/100.

Claim 7

The coating composition of claim 1 in which the polyisocyanate has the formula ##STR8## where R 5 is a hydrocarbon group and the polyisocyanate is blocked with a dialkyl malonate or alkyl ketoxime.

Claim 8

The coating composition of claim 1 in which the polyisocyanate is the biuret of hexamethylene diisocyanate blocked with a dialkyl malonate or an alkyl ketoxime.

Claim 9

The coating composition of claim 1 in which the binder consists essentially of A. 30 to 85% by weight, based on the weight of the binder, of an amine polymer in which the ethylenically unsaturated monomers are selected from the group consisting of alkyl methacrylate, alkyl acrylate each having 1 to 12 carbon atoms in the alkyl group; hydroxy alkyl methacrylate, hydroxy alkyl acrylate each having 2 to 4 carbon atoms in the alkyl group, styrene, vinyl toluene, acrylamide, methacrylamide and any mixtures thereof and wherein R 2 is an aliphatic group containing 2 to 12 carbon atoms, R 3 is a cyclohexyl group; and B. 15 to 70% by weight, based on the weight of the binder, of a blocked organic polyisocyanate having the formula ##STR9## where R 5 is a hydrocarbon group a polyisocyanate that is the biuret of hexamethylene diisocyanate; said polyisocyanates being blocked with a dialkyl malonate or an alkyl ketoxime.

Claim 10

The coating composition of claim 6 containing pigment in a pigment to binder weight ratio of 1/100 to 100/100, the polymerized ethylenically unsaturated monomers consist essentially of methyl methacrylate and styrene, R 1 is H, R 2 is (CH 2 ) 6 and R 3 is ##STR10##

Claim 11

The coating composition of claim 6, containing pigment in a pigment to binder weight ratio of 1/100 to 100/100, the polymerized ethylenically unsaturated monomers consist essentially of styrene, R 1 is H, R 2 is (CH 2 ) 6 and R 3 is ##STR11##

Claim 12

The coating composition of claim 6 containing pigment in a pigment to binder weight ratio of 1/100 to 100/100 the polymerized ethylenically unsaturated monomers consist essentially of methyl methacrylate, R 1 is H, R 2 is (CH 2 ) 6 and R 3 is ##STR12##

Claim 13

The coating composition of claim 7 containing pigment in a pigment to binder weight ratio of 1/100 to 100/100 the polymerized ethylenically unsaturated monomers consist essentially of methyl methacrylate, R 1 is H, R 2 is (CH 2 ) 6 and R 3 is a cyclohexyl group.

Claim 14

A substrate coated with a layer of the composition of claim 1.