发明名称 |
POLYCARBONATE COPOLYMER AND PROCESS FOR PRODUCTION THEREOF |
摘要 |
<p>The problem to be solved by the present invention is to provide a polycarbonate copolymer containing a plant-derived raw material, which is excellent in the mechanical strength and heat-resistant and assured of small refractive index, large Abbe number, small birefringence and excellent transparency. The present invention provides a polycarbonate copolymer containing a constitutional unit derived from a dihydroxy compound represented by the following formula (1) and a constitutional unit derived from an alicyclic dihydroxy compound, wherein the Abbe number is 50 or more and the 5% thermal reduction temperature is 340°C or more; and a method of producing this polycarbonate copolymer by reacting a dihydroxy compound represented by the following formula (1) and an alicyclic hydroxy compound with a carbonic acid diester in the presence of a polymerization catalyst.</p> |
申请公布号 |
EP2033981(A4) |
申请公布日期 |
2010.01.27 |
申请号 |
EP20070745294 |
申请日期 |
2007.06.14 |
申请人 |
MITSUBISHI CHEMICAL CORPORATION |
发明人 |
FUJI, MICHIAKI;AKITA, MINAKO;TANAKA, TOMOHIKO |
分类号 |
C08G64/02 |
主分类号 |
C08G64/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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