Patent ID: 6117969
Filing Date: 2000-09-12
Classification: C08G,C08L

Abstract:
A polycarbonate resin composition comprising:(A) 5 to 95 parts by weight of a polycarbonate resin comprising a plurality of aromatic polycarbonate main chains, each comprising recurring units each independently represented by the following formula (1): ##STR68## wherein Ar represents a divalent C.sub.5 -C.sub.200 aromatic group, wherein said plurality of aromatic polycarbonate main chains collectively contain at least one heterounit (I) and at least one heterounit (II) in said polycarbonate main chairs,said heterounit (I) being represented by a formula selected from the following group (2) of formulae: ##STR69## wherein Ar' represents a trivalent C.sub.5 -C.sub.200 aromatic group, Ar"" represents a tetravalent C.sub.5 -C.sub.200 aromatic group, and X represents a polycarbonate chain having recurring units each represented by the formula ##STR70## wherein Ar is as defined above and having a weight average molecular weight of from 214 to 100,000, and wherein, when said polycarbonate main chains contain a plurality of heterunits (I), the heterounits (I) are the same or different,said heterounit (II) being represented by a formula selected from the following group (3) of formulae: ##STR71## wherein Ar, Ar' and X are as defined above and Y represents a polycarbonate chain having recurring units each represented by the formula ##STR72## wherein Ar is as defined above and having a weight average molecular weight of from 214 to 100,000, andwherein, wherein said polycarbonate main chains contain a plurality of heterounits (II), the heterounits (II) are the same or different,the sum of the amounts of said heterounit (I) and said heterounit (II) being from 0.01 to 0.3 mole %, based on the molar amount of said recurring units (1),wherein each of said X and said Y opticnally contains at least one heterounit selected from the group consisting of heterounits (I) and (II),said polycarbonate having a weight average molecular weight of from 5,000 to 300,000,the value of said weight average molecular weight being obtained by gel permeation chromatography; and(B) 5 to 95 parts by weight of a rubber-reinforced thermoplastic resin comprising a graft copolymer which is obtained by a method comprising grafting on a rubber polymer at least one vinyl compound graft-copolymerizable with said rubber polymer.