会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 3. 发明授权
    • Extrusion method for making polycarbonate
    • 制造聚碳酸酯的挤出方法
    • US06506871B1
    • 2003-01-14
    • US10167903
    • 2002-06-12
    • Norberto SilviPatrick Joseph McCloskeyJames DayMark Howard Giammattei
    • Norberto SilviPatrick Joseph McCloskeyJames DayMark Howard Giammattei
    • C08G6400
    • C08G64/307
    • Extrusion of a mixture of an ester-substituted diaryl carbonate, such as bis(methyl salicyl) carbonate, a dihydroxy aromatic compound such as bisphenol A and a transesterification catalyst such as tetrabutylphosphonium acetate (TBPA) affords polycarbonate having a weight average molecular weight of greater than 20,000 daltons. The extruder is equipped with one or more vacuum vents to remove by-product ester-substituted phenol. Similarly, a precursor polycarbonate having ester-substituted phenoxy endgroups, for example methyl salicyl endgroups, when subjected to extrusion affords a polycarbonate having a significantly increased molecular weight relative to the precursor polycarbonate. The reaction to form a higher molecular weight polycarbonate may be catalyzed by residual transesterification catalyst present in the precursor polycarbonate, or by a combination of any residual catalyst and an additional catalyst such as TBPA introduced in the extrusion step. Fries rearrangement products are not observed in the product polycarbonates.
    • 碳酸二(甲基水杨基)酯,二羟基芳族化合物如双酚A和酯交换催化剂如四丁基鏻乙酸酯(TBPA)的酯取代的二芳基碳酸酯的混合物的挤出得到重均分子量更大的聚碳酸酯 超过20,000道尔顿。 挤出机配备有一个或多个真空通风口以除去副产物酯取代的苯酚。 类似地,具有酯取代的苯氧基端基的前体聚碳酸酯,例如甲基水杨基端基,当进行挤出时,得到相对于前体聚碳酸酯具有显着增加的分子量的聚碳酸酯。 形成较高分子量聚碳酸酯的反应可以通过存在于前体聚碳酸酯中的残留酯交换催化剂,或者通过任何残余催化剂和另外的催化剂如在挤出步骤中引入的TBPA的组合来催化。 在产品聚碳酸酯中没有观察到薯条重排产物。
    • 8. 发明授权
    • Extrusion method for making polycarbonate
    • 制造聚碳酸酯的挤出方法
    • US06420512B1
    • 2002-07-16
    • US09911439
    • 2001-07-24
    • Patrick Joseph McCloskeyJames DayPaul Michael SmigelskiJohn Lester MaxamJohn Aibangbee Osaheni
    • Patrick Joseph McCloskeyJames DayPaul Michael SmigelskiJohn Lester MaxamJohn Aibangbee Osaheni
    • C08G6400
    • C08G64/307
    • Extrusion of a mixture of an ester-substituted diaryl carbonate, such as bis-methyl salicyl carbonate, a dihydroxy aromatic compound such as bisphenol A and a transesterification catalyst such as tetrabutyl phosphonium acetate (TBPA) affords polycarbonate having a weight average molecular weight of greater than 20,000 Daltons. The extruder is equipped with one or more vacuum vents to remove by-product ester-substituted phenol. Similarly, a precursor polycarbonate having ester-substituted phenoxy endgroups, for example methyl salicyl endgroups, when subjected to extrusion affords a polycarbonate having a significantly increased molecular weight relative to the precursor polycarbonate. The reaction to form a higher molecular weight polycarbonate may be catalyzed by residual transesterification catalyst present in the precursor polycarbonate, or by a combination of any residual catalyst and an additional catalyst such as TBPA introduced in the extrusion step. Fries rearrangement products are not observed in the product polycarbonates.
    • 酯取代的碳酸二芳基酯如碳酸双甲酯,双酚A等二羟基芳族化合物和乙酸四丁基鏻(TBPA)等酯交换催化剂的混合物的挤出,得到重均分子量大的聚碳酸酯 超过20,000道尔顿。 挤出机配备有一个或多个真空通风口以除去副产物酯取代的苯酚。 类似地,具有酯取代的苯氧基端基的前体聚碳酸酯,例如甲基水杨基端基,当进行挤出时,得到相对于前体聚碳酸酯具有显着增加的分子量的聚碳酸酯。 形成较高分子量聚碳酸酯的反应可以通过存在于前体聚碳酸酯中的残留酯交换催化剂,或者通过任何残余催化剂和另外的催化剂如在挤出步骤中引入的TBPA的组合来催化。 在产品聚碳酸酯中没有观察到薯条重排产物。