Powder paint with epoxy and hydroxy copolymer and dicarboxylic acids

Claim 2

In a thermosetting powder paint which exclusive of pigments, catalysts, antistatic agents, plasticizers, and flow control agents, the same being conventional non-reactive additives to a thermoset powder paint, consists essentially of a coreactable particulate mixture of (A) a copolymer consisting essentially of about 5 to about 20 weight percent of a glycidyl ester of an unsaturated acid and about 80 to about 95 weight percent of other monoethylenically unsaturated monomers, and having a glass transition temperature in the range of about 40° C. to about 90° C. and a molecular weight (M n ) in the range of about 1500 to about 15,000 and (B) a C 4 -C 20 saturated, straight chain, aliphatic, dicarboxylic acid in the amount of about 0.8 to about 1.1 carboxyl groups for each functional group on said copolymer, the improvement wherein said copolymer is qualitatively difunctional and said other monoethylenically unsaturated monomers consist essentially of difunctional monomers selected from the group consisting of C 5 -C 7 hydroxyalkyl acrylates and C 5 -C 7 hydroxyalkyl methacrylates in an amount comprising about 2 to about 10 weight percent of said copolymer and monoethylenically unsaturated monomers consisting essentially of monofunctional monomers selected from the group consisting of esters of a C 1 -C 8 monohydric alcohol and acrylic acid, esters of a C 1 -C 8 monohydric alcohol and methacrylic acid and C 8 -C 12 monovinyl hydrocarbons.

Claim 3

A powder paint in accordance with claim 1 wherein above 50 weight percent of said monofunctional monomers are acrylates and methacrylates.

Claim 4

A powder paint in accordance with claim 1 wherein said copolymer has molecular weight (M n ) in the range of about 2500 to about 6000.

Claim 5

A powder paint in accordance with claim 1 wherein said glycidyl ester of a monoethylenically unsaturated acid is selected from glycidyl acrylate and glycidyl methacrylate.

Claim 6

A thermosettable powder paint which comprises a coreactive mixture of: 1. A qualitatively difunctional copolymer having a glass transition temperature in the range of about 40° C. to about 90° C. and a molecular weight (M n ) in the range of about 1,500 to about 15,000, said copolymer being formed from a monomer mixture consisting essentially of (a) between about 5 and about 20 weight percent of a glycidyl ester of a monoethylenically unsaturated carboxylic acid; (b) between about 2 and about 10 weight percent of difunctional monomers selected from the group consisting of C 5 -C 7 hydroxyalkyl acrylates and C 5 -C 7 hydroxyalkyl methacrylates; (c) between about 70 and about 93 weight percent of monoethylenically unsaturated monomers consisting essentially of monofunctional monomers selected from the group consisting of esters of a C 1 -C 8 monohydric alcohol and acrylic acid, esters of a C 1 -C 8 monohydric alcohol and methacrylic acid and C 8 -C 12 monovinyl hydrocarbons; and (d) up to 30 weight percent of modifying monomers selected from the group consisting of vinyl chloride, acrylonitrile, methacrylonitrile and vinyl acetate; and

Claim 7

A thermosettable powder paint which comprises a coreactive mixture of: 1. A qualitatively difunctional copolymer having a glass transition temperature in the range of about 40° C. to about 90° C. and a molecular weight (M n ) in the range of about 1,500 to about 15,000, said copolymer being formed from a monomer mixture consisting essentially of (a) between about 5 and about 20 weight percent of a glycidyl ester of a monoethylenically unsaturated carboxylic acid; (b) between about 2 and about 10 weight percent of difunctional monomers selected from the group consisting of C 5 -C 7 hydroxyalkyl acrylates and C 5 -C 7 hydroxyalkyl methacrylates; (c) between about 70 and about 93 weight percent of monoethylenically unsaturated monomers consisting essentially of monofunctional monomers selected from the group consisting of esters of a C 1 -C 8 monohydric alcohol and acrylic acid, esters of a C 1 -C 8 monohydric alcohol and methacrylic acid and C 8 -C 12 monovinyl hydrocarbons; and (d) up to 30 weight percent of modifying monomers selected from the group consisting of vinyl chloride, acrylonitrile, methacrylonitrile and vinyl acetate; and

Claim 8

C 4 -C 20 saturated, straight chain, aliphatic dicarboxylic acid in an amount of about 0.8 to about 1.1 carboxyl groups for each functional group on said copolymer.

Claim 9

C 4 -C 20 saturated, straight chain, aliphatic dicarboxylic acid in an amount of about 0.8 to about 1.1 carboxyl groups for each functional group on said copolymer.

Claim 10

A powder paint in accordance with claim 5 wherein said copolymer has a glass transition temperature in the range of about 50° C. to about 80° C. and a molecular weight (M n ) in the range of about 2,500 to about 6,000.

Claim 11

A powder paint in accordance with claim 5 wherein said glycidyl ester is selected from glycidyl methacrylate and glycidyl acrylate and is included in said monomer mixture in an amount of between about 8 and about 15 weight percent.

Claim 12

A powder paint in accordance with claim 5 wherein said esters of a C 1 -C 8 monohydric alcohol and acrylic acid and said esters of a C 1 -C 8 monohydric alcohol and methacrylic acid comprise at least 50 weight percent of said monofunctional, monoethylenically unsaturated monomers of said monomer mixture.

Claim 13

A powder paint in accordance with claim 5 wherein said saturated, straight chain, aliphatic dicarboxylic acid contains 5 to 13 carbon atoms.

Claim 14

A powder paint in accordance with claim 9 wherein said saturated, straight chain, aliphatic dicarboxylic acid is selected from the group consisting of adipic acid, pimelic acid, suberic acid, azelaic acid, sebasic acid, undecanoic acid and brassylic acid.

Claim 15

A thermosettable powder paint which exclusive of pigments, catalysts, antistatic agents, plastizers, flow control agents and other nonreactive additives, consists essentially of a coreactable particulate mixture of: 1. A qualitatively difunctional copolymer having a glass transition temperature in the range of about 50° C. to about 80° C. and a molecular weight (M n ) in the range of about 2,500 to about 6,000, said copolymer being formed from a monomer mixture consisting essentially of (a) between about 8 and about 15 weight percent of a glycidyl ester of a monoethylenically unsaturated carboxylic acid; (b) between about 2 and about 10 weight percent of difunctional monomers selected from the group consisting of C 5 -C 7 hydroxyalkyl acrylates and C 5 -C 7 hydroxyalkyl methacrylates; and (c) between about 75 and about 90 weight percent of monoethylenically unsaturated monomers consisting essentially of monofunctional monomers selected from the group consisting of (i) esters of a C 1 -C 8 monohydric alcohol and acrylic acid (ii) esters of a C 1 -C 8 monohydric alcohol and methacrylic acid, and (iii) C 8 -C 12 monovinyl hydrocarbons, the total of said monofunctional monomers (i) and (ii) comprising at least 50 weight percent of the monofunctional monoethylenically unsaturated monomers of said monomer mixture; and 2. C 5 -C 13 saturated, straight chain, aliphatic dicarboxylic acids in an amount of about 0.8 to about 1.1 carboxylic groups for each functional group on said copolymer.

Claim 16

A thermosettable powder paint which exclusive of pigments, catalysts, antistatic agents, plastizers, flow control agents and other nonreactive additives, consists essentially of a coreactable particulate mixture of: 1. A qualitatively difunctional copolymer having a glass transition temperature in the range of about 50° C. to about 80° C. and a molecular weight (M n ) in the range of about 2,500 to about 6,000, said copolymer being formed from a monomer mixture consisting essentially of (a) between about 8 and about 15 weight percent of a glycidyl ester of a monoethylenically unsaturated carboxylic acid; (b) between about 2 and about 10 weight percent of difunctional monomers selected from the group consisting of C 5 -C 7 hydroxyalkyl acrylates and C 5 -C 7 hydroxyalkyl methacrylates; and (c) between about 75 and about 90 weight percent of monoethylenically unsaturated monomers consisting essentially of monofunctional monomers selected from the group consisting of (i) esters of a C 1 -C 8 monohydric alcohol and acrylic acid (ii) esters of a C 1 -C 8 monohydric alcohol and methacrylic acid, and (iii) C 8 -C 12 monovinyl hydrocarbons, the total of said monofunctional monomers (i) and (ii) comprising at least 50 weight percent of the monofunctional monoethylenically unsaturated monomers of said monomer mixture; and 2. C 5 -C 13 saturated, straight chain, aliphatic dicarboxylic acids in an amount of about 0.8 to about 1.1 carboxylic groups for each functional group on said copolymer.

Claim 17

A powder paint in accordance with claim 11 wherein said glycidyl ester is selected from glycidyl methacrylate and glycidyl acrylate and said saturated, straight chain, aliphatic, dicarboxylic acid is selected from the group consisting of adipic acid, pimelic acid, suberic acid, azelaic acid, sebasic acid, undecanoic acid and brassylic acid.