发明授权
US3914017A K-sheet type polarizers prepared from polyvinyl alcohol graft copolymers
失效
由聚乙烯醇接枝共聚物制备的K型偏振片
- 专利标题: K-sheet type polarizers prepared from polyvinyl alcohol graft copolymers
- 专利标题(中): 由聚乙烯醇接枝共聚物制备的K型偏振片
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申请号: US41254173申请日: 1973-11-05
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公开(公告)号: US3914017A公开(公告)日: 1975-10-21
- 发明人: BEDELL STANLEY F , TAYLOR LLOYD D
- 申请人: POLAROID CORP
- 专利权人: Polaroid Corp
- 当前专利权人: Polaroid Corp
- 优先权: US41254173 1973-11-05
- 主分类号: G02B5/30
- IPC分类号: G02B5/30 ; G02B27/28
摘要:
K-sheet type polarizers are prepared from polyvinyl alcohol graft copolymers, said graft copolymers being obtained by a redox type grafting procedure utilizing certain transition metal cation catalysts.
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