High solids color coat containing alcohol soluble cellulose acetate butyrate

Claim 2

An acrylic color coat enamel coating composition comprising about 25-50% by weight of a binder of film-forming constituents and correspondingly about 50-75% by weight of a volatile organic solvent carrier at spray viscosity and containing in addition about 2-150% by weight, based on the weight of the binder, of pigment; wherein the binder of film-forming constituents consists essentially of about 20-70% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of 50-90% by weight of an alkyl methacrylate or an alkyl acrylate each having 1-12 carbon atoms in the alkyl groups or a mixture thereof and 10-50% by weight of a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate each having 2-4 carbon atoms in the hydroxyalkyl groups or a mixture thereof and in which the acrylic polymer has a weight average molecular weight of about 2500-25,000 and a glass transition temperature of about -20° C. to +25° C.; about 0-40% by weight, based on the weight of the binder, of a hydroxy-terminated polyester urethane resin; about 25-40% by weight, based on the weight of the binder, of an alkylated melamine formaldehyde crosslinking agent; and about 4-20% by weight, based on the weight of the binder, of a rheology control agent consisting essentially of an alcohol soluble cellulose acetate butyrate having a butyryl content of about 45-50% by weight, a hydroxy content of about 4-5% by weight and a viscosity of about 0.2-0.4 second.

Claim 3

The coating composition of claim 1 wherein the acrylic polymer contains in addition about 0.1-5% by weight, based on the weight of the acrylic polymer, of an ethylenically unsaturated carboxylic acid.

Claim 4

The coating composition of claim 1 wherein the crosslinking agent is a fully alkylated melamine formaldehyde resin having 1-4 carbon atoms in the alkyl groups.

Claim 5

The coating composition of claim 3 wherein the crosslinking agent is a fully alkylated methoxy/butoxymethyl melamine.

Claim 6

The coating composition of claim 1 wherein the crosslinking agent is a partially alkylated, polymeric melamine formaldehyde resin having 1-4 carbon atoms in the alkyl groups.

Claim 7

The coating composition of claim 1 wherein the volatile organic solvent carrier consists essentially of about 30-60% by weight, based on the weight of the total solvent, of methanol, ethanol, acetone, methyl ethyl ketone or a mixture thereof and about 40-70% by weight, based on the weight of the total solvent, of methyl n-amyl ketone, n-butyl acetate, ethylene glycol monobutyl ether acetate, an approximately equivolume blend of ethylene glycol monoethyl ether acetate with diisobutyl ketone or a mixture thereof.

Claim 8

The coating composition of claim 6 wherein the volatile organic solvent carrier contains in addition 10-20% by weight, based on the weight of the total solvent, of ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, propylene glycol monomethyl ether or a mixture thereof.

Claim 9

The coating composition of claim 1 containing 0.1-2% by weight, based on the weight of the binder, of an acid catalyst.

Claim 10

The coating composition of claim 3 containing 0.1-2% by weight, based on the weight of the binder, of an alkyl sulfonic acid or an aryl sulfonic acid catalyst each fully neutralized with an amine.

Claim 11

The coating composition of claim 9 in which the amine is n-propylamine or 4,4-dimethyloxazolidine.

Claim 12

The coating composition of claim 5 containing 0.1-2% by weight, based on the weight of the binder, of phosphoric acid, an alkyl acid phosphate or an aryl acid phosphate.

Claim 13

The coating composition of claim 1 containing about 0.1-4% by weight, based on the weight of the binder, of an ultraviolet light absorber.

Claim 14

The coating composition of claim 1 containing about 0.1-2% by weight, based on the weight of the binder, of a hindered amine light stabilizer.

Claim 15

The coating composition of claim 1 containing aluminum flake pigment.

Claim 16

A substrate having a cured finish comprising the color coat coating composition of claim 1 firmly adhered thereto and a clear coat firmly adhered to the color coat coating composition of claim 1.

Claim 17

An acrylic color coat enamel coating composition comprising about 28-45% by weight of a binder of film-forming constituents and correspondingly about 55-72% by weight of a volatile organic solvent carrier at spray viscosity and containing in addition about 2-150% by weight, based on the weight of the binder, of pigment wherein the binder of film-forming constituents consists essentially of about 20-65% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of 50-90% by weight of an alkyl methacrylate or an alkyl acrylate each having 1-12 carbon atoms in the alkyl groups or a mixture thereof and 10-50% by weight of a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate each having 2-4 carbon atoms in the hydroxyalkyl groups or a mixture thereof and in which the acrylic polymer has a weight average molecular weight of about 2500-25,000 and a glass transition temperature of about -20° C. to +25° C.; about 0-40% by weight, based on the weight of the binder, of a hydroxy-terminated polyester urethane resin; about 30-40% by weight, based on the weight of the binder, of an alkylated melamine formaldehyde crosslinking agent; and about 4-20% by weight, based on the weight of the binder of a rheology control agent consisting essentially of an alcohol soluble cellulose acetate butyrate having a butyryl content of about 45-50% by weight, a hydroxyl content of about 4-5% by weight and a viscosity of about 0.2-0.4 second.

Claim 18

An acrylic color coat enamel coating composition comprising about 28-45% by weight of a binder of film-forming constituents and correspondingly about 55-72% by weight of a volatile organic solvent carrier at spray viscosity and containing in addition about 2-150% by weight, based on the weight of the binder, of pigment wherein the binder of film-forming constituents consists essentially of about 20-65% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of 50-90% by weight of an alkyl methacrylate or an alkyl acrylate each having 1-12 carbon atoms in the alkyl groups or a mixture thereof and 10-50% by weight of a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate each having 2-4 carbon atoms in the hydroxyalkyl groups or a mixture thereof and in which the acrylic polymer has a weight average molecular weight of about 2500-25,000 and a glass transition temperature of about -20° C. to +25° C.; about 0-40% by weight, based on the weight of the binder, of a hydroxy-terminated polyester urethane resin; about 30-40% by weight, based on the weight of the binder, of an alkylated melamine formaldehyde crosslinking agent; and about 4-20% by weight, based on the weight of the binder of a rheology control agent consisting essentially of an alcohol soluble cellulose acetate butyrate having a butyryl content of about 45-50% by weight, a hydroxyl content of about 4-5% by weight and a viscosity of about 0.2-0.4 second.

Claim 19

An acrylic color coat enamel coating composition comprising about 33-45% by weight of a binder of film-forming constituents and correspondingly about 55-67% by weight of a volatile organic solvent carrier at spray viscosity and containing in addition about 2-150% by weight, based on the weight of the binder, of pigment wherein the binder of film-forming constituents consists essentially of about A. 20-66% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of (1) about 40-80% by weight, based on the weight of the acrylic polymer, of an alkyl methacrylate or an alkyl acrylate each having 1-6 carbon atoms in the alkyl groups or a mixture thereof, (2) about 20-40% by weight, based on the weight of the acrylic polymer, of a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate each having 2-4 carbon atoms in the hydroxyalkyl groups or a mixture thereof, (3) 0-20% by weight, based on the weight of the acrylic polymer, of styrene; and wherein the acrylic polymer has a weight average molecular weight of about 3000-12,000 and a glass transition temperature of about -20° C. to +25° C.; B. 0-20% by weight, based on the weight of the binder, of a hydroxy-terminated polyester urethane resin having a number average molecular weight of about 4000-10,000; C. 30-40% by weight, based on the weight of the binder, of a fully alkylated melamine formaldehyde crosslinking agent having 1-4 carbon atoms in the alkyl groups; D. 4-20% by weight, based on the weight of the binder, of an alcohol soluble cellulose acetate butyrate rheology control agent having a butyryl content of about 45-50% by weight, a hydroxyl content of about 4-5% by weight and a viscosity of about 0.2-0.4 second; E. 0.3-10% by weight, based on the weight of the binder, of an alkyl sulfonic acid or an aryl sulfonic acid catalyst each fully neutralized with n-propylamine or 4,4-dimethyloxazolidine; F. 0-3% by weight, based on the weight of the binder, of an ultraviolet light absorber; and G. 0-2% by weight, based on the weight of the binder, of a hindered amine light stabilizer.

Claim 20

An acrylic color coat enamel coating composition comprising about 33-45% by weight of a binder of film-forming constituents and correspondingly about 55-67% by weight of a volatile organic solvent carrier at spray viscosity and containing in addition about 2-150% by weight, based on the weight of the binder, of pigment wherein the binder of film-forming constituents consists essentially of about A. 20-66% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of (1) about 40-80% by weight, based on the weight of the acrylic polymer, of an alkyl methacrylate or an alkyl acrylate each having 1-6 carbon atoms in the alkyl groups or a mixture thereof, (2) about 20-40% by weight, based on the weight of the acrylic polymer, of a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate each having 2-4 carbon atoms in the hydroxyalkyl groups or a mixture thereof, (3) 0-20% by weight, based on the weight of the acrylic polymer, of styrene; and wherein the acrylic polymer has a weight average molecular weight of about 3000-12,000 and a glass transition temperature of about -20° C. to +25° C.; B. 0-20% by weight, based on the weight of the binder, of a hydroxy-terminated polyester urethane resin having a number average molecular weight of about 4000-10,000; C. 30-40% by weight, based on the weight of the binder, of a fully alkylated melamine formaldehyde crosslinking agent having 1-4 carbon atoms in the alkyl groups; D. 4-20% by weight, based on the weight of the binder, of an alcohol soluble cellulose acetate butyrate rheology control agent having a butyryl content of about 45-50% by weight, a hydroxyl content of about 4-5% by weight and a viscosity of about 0.2-0.4 second; E. 0.3-10% by weight, based on the weight of the binder, of an alkyl sulfonic acid or an aryl sulfonic acid catalyst each fully neutralized with n-propylamine or 4,4-dimethyloxazolidine; F. 0-3% by weight, based on the weight of the binder, of an ultraviolet light absorber; and G. 0-2% by weight, based on the weight of the binder, of a hindered amine light stabilizer.

Claim 21

An acrylic color coat enamel coating composition comprising about 28-40% by weight of a binder of film-forming constituents and correspondingly about 60-72% by weight of a volatile organic solvent carrier at spray viscosity and containing in addition about 2-150% by weight, based on the weight of the binder, of pigment wherein the binder of film-forming constituents consists essentially of about A. 20-58% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of (1) about 50-88%, based on the weight of the acrylic polymer, of an alkyl methacrylate or an alkyl acrylate each having 1-6 carbon atoms in the alkyl groups or a mixture thereof, (2) about 10-25% by weight, based on the weight of the acrylic polymer, of a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate each having 2-4 carbon atoms in the hydroxyalkyl groups or a mixture thereof, (3) about 2-5% by weight, based on the weight of the acrylic polymer, of acrylic acid or methacrylic acid, (4) 0-20% by weight, based on the weight of the acrylic polymer, of styrene; and wherein the acrylic polymer has a weight average molecular weight of about 10,000-25,000 and a glass transition temperature of about -20° C. to +25° C.; B. 10-40% by weight, based on the weight of the binder, of a hydroxy-terminated polyester urethane resin having a number average molecular weight of about 4000-10,000; C. 28-38% by weight, based on the weight of the binder, of a partially alkylated, polymeric melamine formaldehyde resin having 1-4 carbon atoms in the alkyl groups; D. 4-20% by weight, based on the weight of the binder, of an alcohol soluble cellulose acetate butyrate rheology control agent having a butyryl content of about 45-50% by weight, a hydroxyl content of about 4-5% by weight and a viscosity of about 0.2-0.4 second; E. 0-2% by weight, based on the weight of the binder, of a catalyst comprising phosphoric acid, an alkyl acid phosphate or an aryl acid phosphate; F. 0-3% by weight, based on the weight of the binder, of an ultraviolet light absorber; and G. 0-2% by weight, based on the weight of the binder, of a hindered amine light stabilizer.

Claim 22

An acrylic color coat enamel coating composition comprising about 28-40% by weight of a binder of film-forming constituents and correspondingly about 60-72% by weight of a volatile organic solvent carrier at spray viscosity and containing in addition about 2-150% by weight, based on the weight of the binder, of pigment wherein the binder of film-forming constituents consists essentially of about A. 20-58% by weight, based on the weight of the binder, of an acrylic polymer consisting essentially of (1) about 50-88%, based on the weight of the acrylic polymer, of an alkyl methacrylate or an alkyl acrylate each having 1-6 carbon atoms in the alkyl groups or a mixture thereof, (2) about 10-25% by weight, based on the weight of the acrylic polymer, of a hydroxyalkyl acrylate or a hydroxyalkyl methacrylate each having 2-4 carbon atoms in the hydroxyalkyl groups or a mixture thereof, (3) about 2-5% by weight, based on the weight of the acrylic polymer, of acrylic acid or methacrylic acid, (4) 0-20% by weight, based on the weight of the acrylic polymer, of styrene; and wherein the acrylic polymer has a weight average molecular weight of about 10,000-25,000 and a glass transition temperature of about -20° C. to +25° C.; B. 10-40% by weight, based on the weight of the binder, of a hydroxy-terminated polyester urethane resin having a number average molecular weight of about 4000-10,000; C. 28-38% by weight, based on the weight of the binder, of a partially alkylated, polymeric melamine formaldehyde resin having 1-4 carbon atoms in the alkyl groups; D. 4-20% by weight, based on the weight of the binder, of an alcohol soluble cellulose acetate butyrate rheology control agent having a butyryl content of about 45-50% by weight, a hydroxyl content of about 4-5% by weight and a viscosity of about 0.2-0.4 second; E. 0-2% by weight, based on the weight of the binder, of a catalyst comprising phosphoric acid, an alkyl acid phosphate or an aryl acid phosphate; F. 0-3% by weight, based on the weight of the binder, of an ultraviolet light absorber; and G. 0-2% by weight, based on the weight of the binder, of a hindered amine light stabilizer.

Claim 23

The coating composition of claim 18 in which the acrylic polymer consists essentially of 25-55% by weight of methyl methacrylate, 30-50% by weight of butyl acrylate, 12-20% by weight of 2-hydroxyethyl acrylate and 3-5% by weight of acrylic acid and in which the acrylic polymer has a weight average molecular weight of about 15,000-20,000 and a glass transition temperature of about -15° C. to +25° C.