发明授权
- 专利标题： Polyimide processing additives
- 专利标题（中）： 聚酰亚胺加工助剂
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申请号： US892058申请日： 1992-05-22
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公开(公告)号： US5272248A公开(公告)日： 1993-12-21
- 发明人: J. Richard Pratt , Terry L. St. Clair , Diane M. Stoakley , Harold D. Burks
- 申请人： J. Richard Pratt , Terry L. St. Clair , Diane M. Stoakley , Harold D. Burks
- 申请人地址： DC Washington
- 专利权人： The United States of America as Represented by the United States National Aeronautics and Space Administration
- 当前专利权人： The United States of America as Represented by the United States National Aeronautics and Space Administration
- 当前专利权人地址： DC Washington
- 主分类号： C08G73/10
- IPC分类号： C08G73/10 ; C08K5/21 ; C08K5/3415 ; C08G69/26
摘要：
A process for preparing polyamides having enhanced melt flow properties is described. The process consists of heating a mixture of a high molecular weight poly(amic acid) or polyimide with a low molecular weight amic acid or imide additive in the range of 0.05 to 15% by weight of additive. The polyimide powders so obtained show improved processability, as evidenced by lower melt viscosity by capillary rheometry. Likewise, films prepared from mixtures of polymers with additives show improved processability with earlier onset of stretching by TMA.
公开/授权文献
- US5843280A Extended nip press device with inclined end face plates 公开/授权日：1998-12-01
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