NOVEL POLYESTER POLYURETHANE POLYOL, POLYOL AGENT FOR TWO-LIQUID TYPE LAMINATE ADHESIVE, RESIN COMPOSITION, CURABLE RESIN COMPOSITION, ADHESIVE FOR TWO-LIQUID TYPE LAMINATE AND BACK SHEET FOR SOLAR CELL

摘要

The invention provides a solar cell backboard adhesive which has advantages of leap improvement of substrate bonding performance, small coloring caused by ultraviolet ray in long-term use, and small substrate bonding deterioration. As a main agent of a double-component laminating adhesive which comprises the novel polyester polyurethane polyol, the novel polyester polyurethane polyol is characterized by comprising a resin structure which is obtained through reaction of the components of: an aliphatic polyester polyol (i) which is obtained through reaction of branched alkylene polyol and aliphatic dicarboxylic acid or alkyl ester; an aliphatic multifunctional-group isocyanate compound (ii) and an aliphatic diol (iii) of which the number of carbon atoms is 2-13.