Patent ID: 6723801
Filing Date: 2004-04-20
Classification: C08G,C08L,H01L,Y10T

Abstract:
A method for producing a polyphenol resin having a weight-average molecular weight of 3,000 or more as determined by GPC, comprising reacting to condense a polyphenol compound represented by formula (1â€²) wherein, nâ€² is an average degree of polymerization as specified by the average molecular weight, and having a weight-average molecular weight of 1,500 or less as determined by GPC with a biphenyl compound represented by formula (2) wherein, X is a halogen, a C1-3 alkoxy group or hydroxyl group, in an amount of 0.01 mol or more and less than 0.5 mol relative to 1 equivalent of the phenolic hydroxyl group of said polyphenol compound.