Patent ID: 9133299
Filing Date: 2015-09-15
Classification: C08G,C08K,C08L

Abstract:
1. A polyurethane resin composition comprising: a first polyurethane resin that includes a soft segment containing a polyol residue containing 1,4-butanediol and ethylene glycol at a molar ratio of 8:2 to 2:8 and a polycarboxylic acid residue, and a hard segment containing a polyisocyanate compound residue and a chain extender residue; a second polyurethane resin that has a different composition from that of the first polyurethane resin, and that includes a soft segment containing a polyol residue containing 1,4-butanediol and ethylene glycol at a molar ratio of 8:2 to 2:8 and a polycarboxylic acid residue, and a hard segment containing a polyisocyanate compound residue and a chain extender residue; an organic solvent including one or more selected from the group consisting of dimethyl formamide (DMF) and methylethylketone (MEK); and a surfactant, wherein the first polyurethane resin and the second polyurethane resin include 20 to 32% by weight of the polyisocyanate compound residue, respectively, and wherein a) the average amount of the polyisocyanate compound residue included in the first polyurethane resin and the second polyurethane resin are different from each other or b) the polyol residue of the first polyurethane resin and the polyol residue of the second polyurethane resin have different average molar ratios of 1,4-butanediol and ethylene glycol.