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公开(公告)号:US06534623B1
公开(公告)日:2003-03-18
申请号:US09912482
申请日:2001-07-25
IPC分类号: C08G6400
CPC分类号: C08G64/40
摘要: Disclosed is a process for the preparation of crystalline polycarbonate oligomer compositions from amorphous polycarbonate oligomer compositions in the presence of a fugitive crystallization rate enhancing agent and/or a high melting polymeric nucleating agent.
摘要翻译: 公开了一种在无规聚碳酸酯低聚物组合物中在逸散结晶速率增强剂和/或高熔点聚合物成核剂存在下制备结晶聚碳酸酯低聚物组合物的方法。
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公开(公告)号:US5990265A
公开(公告)日:1999-11-23
申请号:US102511
申请日:1998-06-22
IPC分类号: C08G63/183 , C08G63/80 , C08G63/02
CPC分类号: C08G63/80 , C08G63/183
摘要: Disclosed herein is a novel physical form of low molecular weight poly(trimethylene terephthalate). This form may be produced from molten low molecular weight poly(trimethylene terephthalate) material by means of rapid heat transfer from the material. The poly(trimethylene terephthalate) composition is suitable for use as a starting material for solid-state polymerization in order to produce polymers of higher molecular weight.
摘要翻译: 本文公开了低分子量聚(对苯二甲酸丙二醇酯)的新型物理形式。 该形式可以由熔融的低分子量聚(对苯二甲酸丙二醇酯)材料通过从材料的快速热传递产生。 聚(对苯二甲酸丙二醇酯)组合物适用于固相聚合的起始原料,以生产高分子量的聚合物。
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