Patent ID: 9321943
Filing Date: 2016-04-26
CPC Classification: C08G,C09J,H01L,Y02E,Y10T

Claim Text:
1. An adhesive composition for a solar cell rear surface protection sheet, comprising: a (meth)acrylic-based copolymer (A) having a glass transition temperature of 10-60° C., a number average molecular weight of 25,000-250,000, and a hydroxyl value of 2-100 (mgKOH/g), and containing no (meth)acryloyl group; a compound containing a (meth)acryloyl group(s) (B); and a polyisocyanate compound (C), the polyisocyanate compound (C) being contained in such an amount that a number of an isocyanate group is 0.1-5 for every one hydroxyl group contained in the (meth)acrylic-based copolymer (A), wherein the cured composition comprises an adhesive peel strength after 2000 hours at 85° C. and 85 percent humidity of no less than 30 N per 15 mm.