Patent ID: 7777356
Filing Date: 2010-08-17
Classification: C08G,C09D

Abstract:
1. A photosemiconductor element encapsulating material comprising a modified polyaluminosiloxane, wherein the modified polyaluminosiloxane is obtained by treating a polyaluminosiloxane with a silane coupling agent represented by formula (I): wherein each of R 1 , R 2 and R 3 is independently an alkyl group or an alkoxy group; X is a methacryloxy group, a glycidoxy group, an amino group, a vinyl group or a mercapto group, with proviso that at least two of R 1 , R 2 and R 3 are alkoxy groups, wherein the polyaluminosiloxane comprises a structural unit represented by at least one of formula (IV): wherein m is an integer of from 40 to 155; and formula (V): wherein n is an integer of from 40 to 155, and a terminal part being —OH.