Invention Grant
US08012571B2 Optical film comprising birefringent naphthalate copolyester having branched or cyclic C4-C10 alkyl units
有权
包含具有支链或环状C 4 -C 10烷基单元的双折射萘二甲酸酯共聚酯的光学膜
- Patent Title: Optical film comprising birefringent naphthalate copolyester having branched or cyclic C4-C10 alkyl units
- Patent Title (中): 包含具有支链或环状C 4 -C 10烷基单元的双折射萘二甲酸酯共聚酯的光学膜
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Application No.: US12114109Application Date: 2008-05-02
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Publication No.: US08012571B2Publication Date: 2011-09-06
- Inventor: Yufeng Liu , David T. Yust , Stephen A. Johnson , Kristopher J. Derks
- Applicant: Yufeng Liu , David T. Yust , Stephen A. Johnson , Kristopher J. Derks
- Applicant Address: US MN St. Paul
- Assignee: 3M Innovative Properties Company
- Current Assignee: 3M Innovative Properties Company
- Current Assignee Address: US MN St. Paul
- Agent Carolyn A. Fischer
- Main IPC: B32B7/00
- IPC: B32B7/00 ; B32B7/02 ; B32B27/08 ; B32B27/30
Abstract:
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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