LEATHER COATING BINDER AND COATED LEATHER HAVING GOOD EMBOSSABILITY AND WET-FLEX ENDURANCE

摘要

An aqueous leather coating composition and a method for coating leatherwith the aqueous coating composition are provided. The aqueous coatingcomposition contains an aqueous emulsion polymer which includes from 0.4% to10% by weight of a copolymerized acetoacetate or acetoacetamide monomer andhas a glass transition temperature from -20 °C to 10 °C. In analternativeembodiment the aqueous coating composition contains an aqueous emulsionpolymer which includes from 0.1% to 6% by weight of a copolymerizedacetoacetate or acetoacetamide monomer and from 2% to 15% by weight ofcopolymerized carboxylic acid monomer and has a glass transition temperaturefrom -40 °C to 0 °C, the polymer having been contacted with atransition metaloxide, hydroxide, or carbonate at a pH less than 9 in an amount greater than0.20 equivalent of transition metal per equivalent of copolymerized carboxylicacid monomer.