Abrasion-resistant coatings

Details Abrasion-resistant coatings Abrasion-resistant coatings

C - Chemistry, Metallurgy

09

D

400/1702

C09D 133/08 (2006.01) C08L 61/20 (2006.01) C08L 71/00 (2006.01)

Patent

CA 1182939

ABRASION RESISTANT COATINGS ABSTRACT Coating compositions which cure on baking to provide hard and flexible coatings characterized by superior abrasion resistance and mar resistance com- prise: (1) a polyol component which is an adduct of at least a stoichiometric proportion of ethylene oxide or propylene oxide with a bisphenol; (2) a solution copolymer containing from 40% to 70% of isobutyl acrylate, 3% to 20% of hydroxy alkyl ester of a monoethylenic carboxylic acid, up to about 20% of monoethylenic carboxylic acid, and any balance consisting essentially of monomer containing a single ethylenic group and no other reactive group; and (3) aminoplast resin. The polyol constitutes from 20% to 40% of the three named components, the copolymer is present in an amount of from 85% to 150% of the polyol, and the balance of the three named components is the aminoplast resin. Carnauba wax is present in an amount of from 1 to 10 pounds of wax solids per 100 gallons of coating compo- sition. When the coatings are baked, the carnauba wax blooms to the surface and resists volatilization.

421855

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