| 摘要 |
The present inventions provide a novel polycarbonate copolymer having high fluidity and high molecular weight which is formed of a structural unit derived from an aliphatic diol compound and a structural unit derived from an aromatic dihydroxy compound, having a structure represented by the formula (III):;;having the content of the structural unit derived from the aliphatic diol compound of 1-30 mol %, having the Q-value (280° C., 160 kg load) in the range from 0.02 to 1.0 ml/s, and having the weight average molecular weight (Mw) of 30,000 to 100,000, and an aromatic polycarbonate compound which is formed of a structural unit derived from an aromatic dihydroxy compound which is suitable for a prepolymer for producing a high fluidity polycarbonate copolymer |
| 主权项 |
1. A high-fluidity polycarbonate copolymer satisfying the following features (a) to (d) which is substantially formed of a structural unit represented by the following general formula (I) derived from an aliphatic diol compound having aliphatic hydrocarbon groups binding to the terminal hydroxy groups and a structural unit represented by the following general formula (II): wherein “Q” represents a hydrocarbon group having at least 3 carbon atoms which may contain an atom of a different kind; R1, R2, R3 and R4 each independently represent a group selected from the group consisting of a hydrogen atom, an aliphatic hydrocarbon group having 1-30 carbon atoms and an aromatic hydrocarbon group having 6-20 carbon atoms, with the proviso that at least one of R1 and R2 and at least one of R3 and R4 are each independently selected from the group consisting of a hydrogen atom and said aliphatic hydrocarbon group; “n” and “m” each independently represent an integer of 0-10 or “n” and “m” each independently represent an integer of 1-10 in the case that Q contains no aliphatic hydrocarbon groups,wherein R1 and R2 each independently represent a halogen atom, an alkyl group having 1-20 carbon atoms, an alkoxy group having 1-20 carbon atoms, a cycloalkyl group having 6-20 carbon atoms, an aryl group having 6-20 carbon atoms, a cycloalkoxyl group having 6-20 carbon atoms or an aryloxy group having 6-20 carbon atoms, “p” and “q” each independently represent an integer of 0-4 and X represents a single bond or a divalent organic group selected from the group consisting of the divalent organic groups represented by the following general formulas (II′): wherein R3 and R4 each independently represent a hydrogen atom, an alkyl group having 1-10 carbon atoms or an aryl group having 6-10 carbon atoms, with the proviso that R3 and R4 can be linked with each other to form an aliphatic ring, (a) said polycarbonate copolymer has a structure represented by the following general formula (III): wherein “k” represents an integer of at least 4, “i” represents an integer of at least 1, “l” represents an integer of at least 1, “k” represents an integer of 0 or 1, R represents a linear or branched hydrocarbon group, a phenyl group which may contain a fluorine atom, or a hydrogen atom, with the proviso that at least 70% by weight of the copolymer molecules based upon the total amount of said polycarbonate copolymer molecules has “i” which is an integer of 1, (b) the content of the structural unit represented by the general formula (I) is 1-30 mol % and the content of the structural unit represented by the general formula (II) is 99-70 mol % based upon the total amount of the structural units constituting said polycarbonate copolymer, (c) said polycarbonate copolymer has Q-value (280° C., 160 kg load) which is an index of fluidity in the range from 0.02 to 1.0 ml/s, and (d) said polycarbonate copolymer has weight average molecular weight (Mw) of 30,000 to 100,000. |
