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公开(公告)号：US3835107A
公开(公告)日：1974-09-10
申请号：US29167172
申请日：1972-09-25
Applicant: BASF AG
Inventor： URBAN F , PFANNMUELLER H , STARK K , GROPPER H
CPC classification number: C08F10/00 , Y10S585/942 , Y10S585/946 , C08F4/28
Abstract: A PROCESS FOR THE PRODUCTION OF WAXY, LOW MOLECULAR WEIGHT POLYETHYLENES IN WHICH ETHYLENE IS POLYMERIZED UNDER THE ACTION OF A POLYMERIZATION INITIATOR WHICH FORMS FREE RADICALS AND IN THE PRESENCE OF A POLYMERIZATION REGULATOR AT ELEVATED TEMPERATURE AND AT SUPERATMOSPHERIC PRESSURE. IT IS A CHARACTERISTIC OF THE PROCESS ACCORDING TO THE INVENTION THAT AS THE FREE RADICAL-FORMING POLYMERIZATION INITIATOR THERE ARE JOINTLY USED: (1) A SPECIFIC AMOUNT OF AN ORGANIC PEROXIDE HAVING A HALF-LIFE TEMPERATURE OF FROM 60* TO 112*C., AND (2) A SPECIFIC AMOUNT OF OXYGEN. HIGH YIELDS CAN BE OBTAINED BY THE PROCESS AND A PRODUCT CAN BE OBTAINED WHICH HAS PARTICULARLY GOOD OIL-BINDING PROPERTIES.
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公开(公告)号：US3714135A
公开(公告)日：1973-01-30
申请号：US3714135D
申请日：1970-09-16
Applicant: BASF AG
Inventor： PFANNMUELLER H , URBAN F , GROPPER H , GIERTH V
Abstract: Production of homopolymers or copolymers of ethylene by homopolymerization of ethylene or copolymerization of mixtures of ethylene and other monomers at superatmospheric pressure and elevated temperature under the influence of a free radical generating polymerization initiator with or without a polymerization regulator. The initiator used is a mixture of (a) an initiator having a halflife of ten to 30 hours at 50* C and (b) an initiator having a halflife of 0.2 to 10 hours at 50*C, the halflife at 50*C of initiator (a) being at least twice as long as that of initiator (b). Polymers having a high molecular weight and a low degree of branching are obtained in a fairly high yield.
Abstract translation: 通过乙烯均聚或乙烯与其它单体的混合物在超大气压和升高的温度下共聚制备乙烯的均聚物或共聚物，在具有或不具有聚合调节剂的自由基产生聚合引发剂的影响下。 使用的引发剂是（a）在50℃下半衰期为10至30小时的引发剂和（b）在50℃下半衰期为0.2至10小时的引发剂的混合物，50℃下的半衰期为 引发剂（a）是起始物（b）的至少两倍。 以相当高的产率获得具有高分子量和低支化度的聚合物。
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