发明名称 |
OPTICAL FILM COMPRISING BIREFRINGENT NAPHTHALATE COPOLYESTER HAVING BRANCHED OR CYCLIC C4-C10 ALKYL UNITS |
摘要 |
The present invention relates to multilayer optical films and birefringent copolyester films. The birefringent copolyester optical layer or birefringent copolyester film comprises a major amount of naphthalate units, ethylene units, and a minor amount of branched or cyclic C4 to C10 alkyl units. Also described are certain copolyester polymeric materials further comprising subunits of a phthalate ionomer such as dimethyl sulfosodium isophthtalate ionomer.
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申请公布号 |
US2011268939(A1) |
申请公布日期 |
2011.11.03 |
申请号 |
US201113182658 |
申请日期 |
2011.07.14 |
申请人 |
3M INNOVATIVE PROPERTIES COMPANY |
发明人 |
LIU YUFENG R.;YUST DAVID T.;JOHNSON STEPHEN A.;DERKS KRISTOPHER J. |
分类号 |
B32B7/02;B32B27/06;C08G63/189 |
主分类号 |
B32B7/02 |
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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