发明授权
- 专利标题： Anisotropically oriented phase difference compensation film of a branched polycarbonate
- 专利标题（中）： 支链聚碳酸酯的各向异性相位差补偿膜
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申请号： US137108申请日： 1993-10-18
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公开(公告)号： US5470937A公开(公告)日： 1995-11-28
- 发明人: Masaya Okamoto , Shigeki Kuze , Noriyuki Kunishi , Taisuke Nakashima
- 申请人： Masaya Okamoto , Shigeki Kuze , Noriyuki Kunishi , Taisuke Nakashima
- 申请人地址： JPX Tokyo
- 专利权人： Idemitsu Petrochemical Co., Ltd.
- 当前专利权人： Idemitsu Petrochemical Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX4-042800 19920228; JPX4-296162 19921105
- 主分类号： C08G64/14
- IPC分类号： C08G64/14 ; G02B1/04 ; G02B5/30 ; G02F1/13363 ; C08G64/00
摘要：
A phase difference compensation film formed of a polycarbonate, which can be used in a liquid crystal display and which shows a decreased change in retardation caused by a temperature change at a stretch forming time due to the use of a polycarbonate having a branched structure and having a viscosity-average molecular weight of 40,000 or less as the above polycarbonate.