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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

Method of preparing polyesters modified with trihydroxybenzophenone
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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