发明授权
US4354016A Method of preparing polyesters modified with trihydroxybenzophenone
失效
制备用三羟基二苯甲酮改性的聚酯的方法
- 专利标题: Method of preparing polyesters modified with trihydroxybenzophenone
- 专利标题(中): 制备用三羟基二苯甲酮改性的聚酯的方法
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申请号: US210756申请日: 1980-11-28
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公开(公告)号: US4354016A公开(公告)日: 1982-10-12
- 发明人: Robert B. Rashbrook , Patrick J. Horner
- 申请人: Robert B. Rashbrook , Patrick J. Horner
- 申请人地址: GB2 London
- 专利权人: Imperial Chemical Industries Limited
- 当前专利权人: Imperial Chemical Industries Limited
- 当前专利权人地址: GB2 London
- 优先权: GBX7942482 19791210
- 主分类号: C08G63/00
- IPC分类号: C08G63/00 ; C08G63/66 ; C08G63/672 ; C08G63/91
摘要:
UV stable linear polyesters, e.g. polyethylene terephthalate, contain in their chain copolymerized 2-hydroxy-di(hydroxyalkoxy)benzophenone. The polyesters are useful for making biaxially oriented films. The polyesters can be made by polycondensation in the presence of 2,4,4'-trihydroxybenzophenone.
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