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1.发明授权Conversion of sticky elastomeric polymer crumb into pellets without polymer degradation 失效将粘性弹性体聚合物碎屑转化成颗粒而不会聚合物降解公开(公告)号：US06458300B1
公开(公告)日：2002-10-01
申请号：US09306123
申请日：1999-05-06
IPC分类号： B29C4736
CPC分类号： B29B7/421 , B29B9/06 , B29C47/0011 , B29C47/385 , B29C47/6087 , B29C47/661 , B29C47/666 , B29C47/667 , B29C2947/9259
摘要： A process for pelletizing elastomeric anionically polymerized polymers which comprises subjecting the polymer to solid state extrusion in a single screw extruder with a length to diameter ratio of 10:1 or less wherein the barrel of the extruder has longitudinal grooves and transversally extending pins to increase mixing wherein the temperature in the extruder is sufficient to agglomerate or melt the polymer but be lower than the degradation temperature of the polymer and the speed of the extruder screw is from 30 to 100 rpm.
摘要翻译： 一种用于造粒弹性体阴离子聚合聚合物的方法，其包括使聚合物在长度与直径比为10:1或更小的单螺杆挤出机中进行固态挤出，其中挤出机的筒体具有纵向槽和横向延伸的销以增加混合 其中挤出机中的温度足以聚合或熔化聚合物，但低于聚合物的降解温度，挤出机螺杆的速度为30至100rpm。
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公开(公告)号：USH1956H1
公开(公告)日：2001-04-03
申请号：US09093245
申请日：1998-06-08
IPC分类号： C08G6926
摘要： In a process for producing hydrogenated block copolymers of conjugated dienes and/or vinyl aromatic hydrocarbons which comprises anionically polymerizing the monomers in an inert hydrocarbon solvent in the presence of an alkali metal initiator whereby a polymer cement is produced, contacting the cement with hydrogen under hydrogenation conditions in the presence of a hydrogenation catalyst, and then removing the hydrogenation catalyst residue by washing the polymer cement with water or an aqueous acid, the improvement which comprises reducing the viscosity of the polymer cement by polymerizing the block copolymer under conditions such that the vinyl content of the polymer produced in the polymerization step is in the range from 45 to 80 percent by weight.
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