Patent ID: 9240551
Filing Date: 2016-01-19
CPC Classification: C08G,C09B,H01L,Y02E,Y02P

Claim Text:
1. A polymer, comprising a unit of formula Ar 3 c Ar 2 b Ar 1 a Y Ar 1′ a′ Ar 2′ b′ Ar 3′ c′ (I), wherein Y is a group of formula a is 1, 2, or 3, a′ is 1, 2, or 3; b is 0, 1, 2, or 3; b′ is 0, 1, 2, or 3; c is 0, 1, 2, or 3; c′ is 0, 1, 2, or 3; U U T R a C a C a C a C a C a —CO—C R R Ar wherein X is —O—, —S—, —NR Ar wherein X R R R R R R R R R R R R R R D is —CO—, —COO—, —S—, —O—, or —NR E is C G is E, or C R R R R R R