POLYCARBONATE COPOLYMER HAVING HIGH FLUIDITY, METHOD FOR PRODUCING AROMATIC POLYCARBONATE RESIN HAVING HIGH MOLECULAR WEIGHT, AND AROMATIC POLYCARBONATE COMPOUND

摘要

- 238 -HIGH-FLUIDITY POLYCARBONATE COPOLYMER, 5 The present inventions providea novel polyparbonate copolymer having high fluidity and high molecular weight wh.ich is formed of a structural unit derived from an aliphatic dial compound and a structural unit derived from an aromatic dihydroxy compound, having a structure 10 represented ovine formula (III) :[ Chemical Formula IiIiR C-1- (II)k- ( I ),having the content of the structural uni) derived from the aliphatic dial compound of 1-30 mol%, having thd (..) -value (280b3, 15 160kc load) in the range from 0.02 to 1.0. mi/s, and having the weight average no ecular weignt (Mw) of 30,000 to 100,000,an. aromatic dolvcarbonate compound which is. formed ot araptpral urelt, derived f rom an a romaL C .21 rry droxy compound wn i on is suit,F3trie for a. prepolymer for producing a high fluidity20 Polycarbonate copolymer andan imigroved methdd for prdduping a highl v polymerizedaromatic polycarb•nate resin which comprises reacting an aromatic polyearbonate with an aliphatic diol compound and removing cyclic carbonate produced as a. by-product from the 25 reaction system.(Fig. 1)