Patent ID: 6323300
Filing Date: 2001-11-27
Classification: C08G,Y10T

Abstract:
An aromatic copolymer comprising a plurality of aromatic copolymer chains, each comprising:(A) recurring 2,6-diphenylphenol units, each represented by the following formula (1): ##STR6##(B) phenolic comonomer units, each phenolic comonomer unit being independently selected from the group consisting of:(i) an oxyphenylene monomer unit which is monosubstituted with a substituent selected from the group consisting of a C.sub.6 -C.sub.18 monovalent aromatic group and a halogen atom,(ii) an .alpha.-oxynaphthylene monomer unit,(iii) a .beta.-oxynaphthylene monomer unit, and(iv) an oxyphenylene monomer unit which is substituted with at least one aliphatic group selected from the group consisting of a C.sub.1 -C.sub.10 alkyl group, a C.sub.1 -C.sub.10 alkoxy group, a C.sub.2 -C.sub.10 alkenyl group and a C.sub.2 -C.sub.10 alkynyl group,wherein the amount of said recurring 2,6-diphenylphenol units (A) is from 70 to 90% by weight, based on the weight of said aromatic copolymer, and the amount of said phenolic comonomer units (B) is from 10 to 30% by weight, based on the weight of said aromatic copolymer, provided that, when said oxyphenylene monomer unit (iv) is present as the comonomer unit, the amount of said oxyphenylene monomer unit (iv) is 20% by weight or less, based on the total weight of said phenolic comonomer units (B), andwherein said aromatic copolymer has a weight average molecular weight of from 1,000 to 3,000,000 as measured by gel permeation chromatography.