发明授权
- 专利标题： Method to reduce gel formation in pet resin
- 专利标题（中）： 减少宠物树脂凝胶形成的方法
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申请号： US997144申请日： 1997-12-23
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公开(公告)号： US5874515A公开(公告)日： 1999-02-23
- 发明人: Xiaoyan Huang , Ligia Dominguez
- 申请人： Xiaoyan Huang , Ligia Dominguez
- 申请人地址： NC Charlotte
- 专利权人： Hoechst Celanese Corporation
- 当前专利权人： Hoechst Celanese Corporation
- 当前专利权人地址： NC Charlotte
- 主分类号： C08G63/183
- IPC分类号： C08G63/183 ; C08G63/78 ; C08G63/80 ; C08G63/85 ; C08G63/00
摘要：
There is disclosed a process for reducing the number of gels generated in polyethylene terephthalate (PET) resin. Gels are crosslinked polymers created by thermal and thermo-oxidative degradation induced during polymer production. The instant process comprises the addition of primary and secondary antioxidants prior to the PET polycondensation reaction in order to reduce the amount of thermal degradation which occurs. The polyethylene terephthalate produced by this process formed approximately 25 to 90% fewer gels while maintaining physical properties suitable for use in fiber, film, and molding applications.
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