Patent ID: 7074885
Filing Date: 2006-07-11
Classification: C08F,C08G,C09K,H01L,H05B,Y02E,Y10T

Abstract:
1. A copolymer comprising at least one first monomeric unit and at least one second monomeric unit, wherein the at least one first monomeric unit has a Formulae Ia and the at least one second monomeric unit is selected from (i) aromatic groups having Formula II where: in each of Formulae Ia and II: R is a substituent on a carbon atom which can be the same or different at each occurrence and is selected from hydrogen, alkyl, aryl, heteroalkyl, heteroaryl, F, —CN, —OR  adjacent R groups together can form a 5- or 6-membered cycloalkyl, aryl, or heteroaryl ring, such that: R ψ is an integer between 1 and 20, and θ and λ are integers satisfying Equation A1 below: in each of Formula II: E can be the same or different at each occurrence and is a single bond or a linking group selected from arylene and heteroarylene and wherein, when R is a linear alkyl it is not n-hexyl.