| 发明名称 |
COPOLYMER FOR OPTICAL COMPENSATION FILM |
| 摘要 |
A copolymer for optical compensation film showing a negative orientation birefringence, having excellent transparency, heat resistance, film strength, and optical properties, and is capable of obtaining a beautiful film suitable for an optical compensation film is provided. A copolymer for optical compensation film, containing: 45 to 80 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 5 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has an average number molecular weight (Mn) of 5.5×104 to 9×104 and a weight average molecular weight (Mw) of 14×104 to 20×104; and the copolymer has a haze of 1% or less, the haze being measured with a 2 mm thick sample in accordance with ASTM D1003, is provided. |
| 申请公布号 |
US2015205012(A1) |
申请公布日期 |
2015.07.23 |
| 申请号 |
US201314417430 |
申请日期 |
2013.07.29 |
| 申请人 |
DENKI KAGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
Noguchi Tetsuo;Ozawa Koichi;Matsumoto Masanori;Shimokoba Yuichi |
| 分类号 |
G02B1/08;G02B5/30;C08F212/08;G02B1/04 |
主分类号 |
G02B1/08 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A copolymer for optical compensation film, comprising:
45 to 80 mass % of an aromatic vinyl monomer unit; 5 to 45 mass % of a (meth)acrylic acid ester monomer unit; and 5 to 20 mass % of an unsaturated dicarboxylic acid anhydride monomer unit; wherein the copolymer has an average number molecular weight (Mn) of 5.5×104 to 9×104 and a weight average molecular weight (Mw) of 14×104 to 20×104; and the copolymer has a haze of 1% or less, the haze being measured with a 2 mm thick sample in accordance with ASTM D1003. |
| 地址 |
Tokyo JP |
