发明授权
US07135545B2 High molecular weight lenses formed from viscosity-specific polycarbonate
失效
由粘度特定的聚碳酸酯形成的高分子量透镜
- 专利标题: High molecular weight lenses formed from viscosity-specific polycarbonate
- 专利标题(中): 由粘度特定的聚碳酸酯形成的高分子量透镜
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申请号: US10835433申请日: 2004-04-29
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公开(公告)号: US07135545B2公开(公告)日: 2006-11-14
- 发明人: Hsinjin Edwin Yang , Hao Wen Chiu
- 申请人: Hsinjin Edwin Yang , Hao Wen Chiu
- 申请人地址: FR
- 专利权人: Essilor International Compagnie General D'Optique
- 当前专利权人: Essilor International Compagnie General D'Optique
- 当前专利权人地址: FR
- 代理机构: Keusey, Tutunjian & Bitetto, P.C.
- 主分类号: C08F6/00
- IPC分类号: C08F6/00
摘要:
Methods are disclosed which utilize polycarbonate to form solid optical lenses. The polycarbonates may be selected from high molecular weight linear or branched species. Viscosity and melt flow are specified for improved mechanical properties. The method provides lenses with greater resistance to cracking and crazing, for example, in instances where flaws are subject to strain and require containment.