Patent ID: 6926973
Filing Date: 2005-08-09
Classification: C08G,C08L,C09K,H01L,H05B,Y10S

Abstract:
1. A copolymer having a polystyrene reduced number average molecular weight of 10 3 -10 8 , and comprising a repeating unit represented by formula (1), one or more kinds of repeating units represented by formula (2), and one or more kinds of repeating units represented by formula (3), wherein, R 1 and R 2 each independently show a hydrogen atom, alkyl group, aryl group, or monovalent heterocyclic group; R 3 and R 4 each independently show alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, aryl group, aryloxy group, arylsilyl group, arylamino group, arylalkyl group, arylalkoxy group, arylalkyl silyl group, arylalkyl amino group, monovalent heterocyclic group, or cyano group; m and n each independently show an integer of 0-3; when n is two or more, a plurality of R 3 s may be the same or different; when m is two or more, a plurality of R 4 may be the same or different; two or more of R 1 , R 2 , R 3 and R 4 , may be mutually connected to form a ring; and when R 1 , R 2 , R 3 , or R 4 contains an alkyl chain, the alkyl chain may be interrupted by a group containing a hetero atom, wherein, R 5 and R 6 each independently show a hydrogen atom, alkyl group, aryl group, or a monovalent heterocyclic group; either R 5 or R 6 is different from either R 1 or R 2 ; R 7 and R 8 each independently show an alkyl group, alkoxy group, alkylthio group, alkylsilyl group, alkylamino group, aryl group, aryloxy group, arylsilyl group, arylamino group, arylalkyl group, arylalkoxy group, arylalkylsilyl group, arylalkylamino group, monovalent heterocyclic group, or cyano group; k and l are each independently an integer of 0-3; when k is two or more, a plurality of R 7 s are the same or different; when l is two or more, a plurality of R 8 is the same or different; two or more of R 5 , R 6 , R 7 and R 8 , may be connected mutually to form a ring; and when R 5 , R 6 , R 7 , or R 8 contains an alkyl chain, the alkyl chain may be interrupted by a group containing a hetero atom, wherein, Ar 1 shows an arylene group, divalent heterocyclic group, or divalent aromatic amine group.