Patent ID: 8871894
Filing Date: 2014-10-28
Classification: C08G,C09D,G03F

Abstract:
1. A production method of a polyhydroxyimide, comprising: adding to a polyhydroxyimide precursor containing a repeating structure of Formula (1): (where X is a tetravalent aliphatic group or aromatic group, Y is an organic group containing an aromatic group substituted with at least one OH group, and n is an integer of 1 or more), at least a compound of Formula (2) or Formula (3): (where R R W is a C (where m is a natural number, R W is a C or both compounds of Formula (2) and Formula (3) and heating the resultant reaction mixture at a temperature of 50° C. or more to obtain a polyimide containing a repeating structure of Formula (4): (where X, Y, and n are the same as defined above) and having a weight average molecular weight measured by gel permeation chromatography (GPC) in terms of polystyrene of 5,000 to 100,000.