Patent ID: 9085123
Filing Date: 2015-07-21
Classification: B32B,C09D,Y02P,Y10T

Abstract:
1. A method to form a coating comprising a blend of ionomer and poly(vinyl alcohol) on a substrate, the method comprising (1) providing a blend composition comprising (a) about 99 to about 1 weight %, based on the combination of (a) and (b), of a poly(vinyl alcohol) composition comprising a poly(vinyl alcohol) characterized by (i) a hydrolysis level of from about 85 to about 93 mol % and a 4 weight % aqueous viscosity at 20° C. of 15 centipoise (cp) or less; or (ii) a hydrolysis level of about 95 mol % to 100%; and (b) about 1 to about 99 weight %, based on the combination of (a) and (b), of an ionomer composition consisting essentially of-a parent acid copolymer that consists essentially of copolymerized units of ethylene and about 18 to about 30 weight % of copolymerized units of acrylic acid or methacrylic acid, based on the total weight of the parent acid copolymer, the acid copolymer having a melt flow rate (MFR) from about 200 to about 1000 g/10 min., measured according to ASTM D1238 at 190° C. with a 2160 g load, wherein about 50% to about 70% of the carboxylic acid groups of the copolymer, based on the total carboxylic acid content of the parent acid copolymer as calculated for the non-neutralized parent acid copolymer, are neutralized to carboxylic acid salts wherein the cations consist essentially of potassium cations, sodium cations or combinations thereof; wherein the blend composition is provided in the form of an aqueous dispersion comprising water and about 0.001 to about 50 weight % of the combination of (a) and (b) without the use of aqueous sodium hydroxide, aqueous potassium hydroxide or ammonia during the dispersion process; (2) providing a substrate; (3) coating the blend composition onto the substrate as the aqueous dispersion; and (4) drying the coated substrate at a temperature of about 20 to about 150° C.