公开(公告)号：US06316575B1

公开(公告)日：2001-11-13

申请号：US09147436

申请日：1998-12-23

申请人： Shigeki Kuze ,  Kenji Tanaka ,  Akiko Yabe ,  Misako Ishikawa ,  Naoko Seino

发明人： Shigeki Kuze ,  Kenji Tanaka ,  Akiko Yabe ,  Misako Ishikawa ,  Naoko Seino

IPC分类号： C08G6400

CPC分类号： C08G64/30

摘要： Provided are a method for producing polycarbonates through melt transesterification, wherein is used a polymerization catalyst comprising a phosphorus-containing basic compound and a quaternary phosphonium salt having a specific structure; and a method for producing polycarbonates, which comprises pre-polymerization to prepare polycarbonate prepolymers followed by final polymerization of said prepolymers in a solid phase or in a swollen solid phase to produce the products, polycarbonates, and in which (1) a catalyst comprising a phosphorus-containing basic compound and a quaternary phosphonium salt having a specific structure is used in the pre-polymerization and in the final polymerization, or (2) a catalyst of a tri-valent or penta-valent phosphorus compound or a nitrogen-containing organic basic compound is used in the final polymerization, or (3) the final polymerization is effected in a vapor-phase atmosphere having an oxygen concentration of not larger than 2 ppm. In those methods, high-quality polycarbonates having good appearance, high heat resistance and high hydrolysis resistance are produced extremely efficiently.

摘要翻译： 提供通过熔融酯交换法生产聚碳酸酯的方法，其中使用包含含磷碱性化合物和具有特定结构的季鏻盐的聚合催化剂; 和聚碳酸酯的制造方法，其包括预聚合以制备聚碳酸酯预聚物，然后在固相或溶胀固相中最终聚合所述预聚物以制备产物，聚碳酸酯，并且其中（1）催化剂包含 在预聚合和最终聚合中使用含磷碱性化合物和具有特定结构的季鏻盐，或（2）三价或五价磷化合物或含氮有机物的催化剂 在最终聚合中使用碱性化合物，或（3）最终聚合在氧浓度不大于2ppm的气相气氛中进行。 在这些方法中，非常有效地制造出具有良好外观，高耐热性和高耐水解性的高品质聚碳酸酯。