Patent ID: 7683152
Filing Date: 2010-03-23
Classification: C08G,C08L

Abstract:
1. A partial block polyimide-polysiloxane copolymer comprising repeat unit structures having the following structural formulae (2) and (8): wherein X is at least one aromatic ring-containing tetravalent organic radical selected from the group consisting of: Y y y m is a weight average value of 9.1 to 50, j is a weight average value of 8.8 to 50, wherein R wherein A is a radical selected from the following group [9a]: group [9a] B is a radical selected from the following group [9b]: group [9b] R is each independently a hydrogen atom, halogen atom or substituted or unsubstituted, monovalent hydrocarbon radical of 1 to 8 carbon atoms, and k is a natural number of 1 to 5.