High solids ambient temperature curing coatings of acrylic-fatty acid drying oil resins

[5. The coating composition of claim 4 in which the polymer has a number average molecular weight of about 1,500-8,000 and a weight average molecular weight of about 6,000-30,000 and a molecular weight distribution

• of about 1-5.] 6. The coating composition of claim [5] 2 in which the polymer comprises about 35-65% by weight of an alkyl methacrylate, 10-30% by weight of a [hydroxy alkyl methacrylate or a] hydroxy alkyl methacrylate or a hydroxyl alkyl acrylate each having 2-4 carbon atoms in the alkyl group and 25-45% by weight of
• drying oil fatty acids. 7. The coating composition of claim [6] 2 in which the polymer consists essentially of 40-55% by weight of methyl methacrylate, 15-25% by weight of hydroxy ethyl methacrylate and 30-40% by weight of a mixture of drying oil fatty acids which comprises oleic acid, linoleic acid and conjugated linoleic acid.
• The coating composition of claim 7 in which the polymer contains [in addition up to about 10% by weight, based on the weight of the polymer, of] an ester of the formula ##STR6## where R is an aliphatic hydrocarbon group in an amount of up to
• about 10% by weight, based on the weight of the polymer . 9. The coating composition of claim 6 that contains about 1-40% by weight, based on the weight of the polymer, of a reactive diluent which is an ester of a
• carboxylic acid and an epoxy resin. 10. The coating composition of claim 9 in which the reactive diluent is the esterification product of sorbic acid and an epoxy resin.

[15. The coating composition, of claim 14 in which the polymer contains in addition up to about 10% by weight, based on the weight of the polymer, of an ester of the formula ##STR8## where R is a tertiary aliphatic hydrocarbon group having 8-10 carbon

• atoms.] 16. The coating composition of claim [15] 1 that contains in addition about [0.1.5% by weight, based on the weight of the polymer, of aluminum metal from organo aluminum complex] 15-25% by weight, based on the weight of the polymer, of a plasticizer consisting essentially of a linseed oil glycerol phthalate
• ester resin . 17. An article coated with a dried coalesced and
• cured film of the composition of claim 1. 18. A metal substrate coated with an about 1-5 mil thick film of a dried coalesced and cured coating
• composition of claim 16. 19. A high solids coating composition comprising a blend of polymers having a glass transition temperature of at least 20.degree. C. consisting essentially of
• (1) a polymer having a glass transition temperature of at least about 20.degree. C. up to about 65.degree. C. and having a backbone of polymerized monomers selected from the group consisting of an alkyl methacrylate, and alkyl acrylate, styrene or mixtures thereof and hydroxy containing monomers selected from the group consisting of a hydroxy alkyl acrylate, a hydroxy alkyl methacrylate or mixtures thereof, wherein the active hydrogen of at least one pendant hydroxyl group of the backbone is replaced by ##STR9## where R is the residual of drying oil fatty acids;
• and (2) a polymer having a glass transition temperature below 20.degree. C. and having a backbone of polymerized monomers selected from the group consisting of an alkyl methacrylate, an alkyl acrylate, styrene or mixtures thereof and hydroxy containing monomers selected from the group consisting of a hydroxy alkyl acrylate, a hydroxy alkyl methacrylate or mixtures thereof, wherein the active hydrogen of at least one pendant hydroxyl group of the backbone is replaced by ##STR10## where R is the residual of drying oil fatty acids;
• each of said polymers having a number average molecular weight of about 1,500-8,000 and a weight average molecular weight of about 6,000-30,000 and a molecular weight distribution of about 1-5;
• wherein the composition contains about 0.01-5% by weight, based on the weight of the coating composition, of an organo metallic drier selected from the group consisting of cobalt, copper, lead, zirconium, calcium, iron, nickel, tin, zinc and lithium organo metallic driers and about 0.1-5% by weight, based on the weight of
• the polymer, of aluminum metal from an aluminum complex . 20. A pigment dispersant of a polymer consisting essentially of 25-35% by weight of methyl methacrylate, 15-25% by weight of styrene, 15-25% by weight of hydroxy alkyl methacrylate or a hydroxy alkyl acrylate each having 2-4 carbon atoms in the alkyl group and 20-30% by weight of the residual of drying oil fatty acids which are attached to the polymer by replacing an active hydrogen of at least one hydroxyl group provided by the hydroxy alkyl acrylate or hydroxy alkyl methacrylate with ##STR11## where R is the residual of drying oil fatty acids wherein the polymer has a glass transition temperature of at least about 20.degree. C. up to about 65.degree. C. and has a number average molecular weight of about 1,500-8,000 and a weight average molecular weight of about 6,000-30,000 and a molecular weight distribution of about 1-5 and contains in addition up to about 10% by weight, based on the weight of the polymer, of an ester of the formula ##STR12## where R is an aliphatic hydrocarbon group in an amount up to about 10% by
• weight, based on the weight of the polymer .

[22. The pigment dispersant of claim 21 in which the polymer contains in addition up to about 10% by weight, based on the weight of the polymer, of an ester of the formula ##STR13##

• where R is an aliphatic hydrocarbon group.] 23. The pigment dispersant of claim [21] 20 in which the polymer consists essentially of methyl methacrylate, styrene, hydroxy ethyl methacrylate and a mixture which comprises drying oil fatty acids of oleic acid,
• linoleic acid and conjugated linoleic acid. 24. A high solids coating composition comprising a polymer having a backbone of polymerized monomers selected from the group consisting of an alkyl methacrylate, an alkyl acrylate, styrene or mixtures thereof and hydroxyl containing monomers selected from the group consisting of a hydroxy alkyl acrylate, a hydroxy alkyl methacrylate or mixtures thereof, wherein the active hydrogen of at least one pendant hydroxyl group of the backbone is replaced by ##STR14## where R is the residual of drying oil fatty acids and wherein the polymer has a glass transition temperature below 20.degree. C.;
• and the polymer has a number average molecular weight of about 1,500-8,000 and a weight average molecular weight of about 6,000-30,000 and a molecular weight distribution of about 1-5;
• wherein the composition contains about 0.01-5% by weight, based on the weight of the coating composition, of an organo metallic drier selected from the group consisting of cobalt, copper, lead, zirconium, calcium, iron, nickel, tin, zinc and lithium organo metallic driers and about 0.1-5% by weight, based on the weight of the polymer, of an aluminum metal from an organo aluminum
• complex . 25. The coating composition of claim 24 containing
• pigment. 26. The coating composition of claim 24 containing about 5-70% by weight of a solvent for the polymer and 95-30% by weight of the polymer.