Patent ID: 8313973
Filing Date: 2012-11-20
Classification: C08G,C09D,H01L,Y02E

Abstract:
1. A method for producing a photovoltaic module; said method comprising contacting at least one layer of liquid encapsulant and a plurality of solar cells; wherein the liquid encapsulant comprises: (i) an acrylic polyol having a terminal hydroxy group, an average number of hydroxy-functional monomer units per polymer chain from 2 to 25, Mn from 1,000 to 10,000, Tg from −100° C. to −40° C. and comprising from 65 to 95 wt % polymerized residues of C 4 -C 12 alkyl(meth)acrylate and 5 to 35 wt % polymerized residues of hydroxy-containing acrylic monomer; and (ii) an aliphatic polyisocyanate with an average functionality of at least two; wherein a molar ratio of non-terminal hydroxy groups in the polyol to isocyanate groups in the aliphatic polyisocyanate is from 0.5:1 to 1:0.5.