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公开(公告)号：US3702845A
公开(公告)日：1972-11-14
申请号：US3702845D
申请日：1970-02-11
Applicant: BASF AG
Inventor： STEIGERWALD KLAUS , BUECHNER OSKAR , URBAN FRIEDRICH , PFANNMUELLER HELMUT
Abstract: PRODUCTION OF ETHYLENE HOMOPOLYMERS HAVING A SPECIFIC DENSITY BY POLYMERIZATION OF ETHYLENE UNDER THE ACTION OF ORGANIC PEROXIDES AND OXYGEN AS FREE-RADICAL-GENERATING POLYMERIZATION INITIATORS AND OF POLYMERIZATION MODIFIERS AT ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE IN A TUBULAR REACTOR HAVING TWO SUCCESSIVE REACTION ZONES, A MIXTURE OF ETHYLENE, POLYMERIZATION INITIATOR AND POLYMERIZATION MODIFIER BEING INTRODUCED CONTINUOUSLY AT THE BEGINNING OF EACH REACTION ZONE. OXYGEN AS POLYMERIZATION INITIATOR AND A MIXTURE OF A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY LOW C5 VALUE AND A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY HIGH C5 VALUE ARE USED IN THE FIRST REACTION ZONE, AND AN ORGANIC PEROZIDE HAVING A SPECIFIC HALF VALUE TEMPERATURE AS POLYMERIZATION INITIATOR AND A MIXTURE OF A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY LOW C5 VALUE AND A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY HIGH POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY HIGH C5 VALUE ARE EMPLOYED IN THE SECOND REACTION ZONE. THE ETHYLENE HOMOPOLYMERS OBTAINED HAVE A WIDE MOLECULAR WEIGHT DISTRIBUTION AND ARE PRACTICALLY DEVOID OF VERY HIGH MOLECULAR WEIGHT CONSTITUENTS.
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公开(公告)号：US3657212A
公开(公告)日：1972-04-18
申请号：US3657212D
申请日：1970-02-11
Applicant: BASF AG
Inventor： STEIGERWALD KLAUS , BUECHNER OSKAR , URBAN FRIEDRICH , PFANNMUELLER HELMUT
Abstract: PRODUCTION OF ETHYLENE HOMOPOLYMERS HAVING A SPECIFIC DENSITY BY POLYMERIZATION OF ETHYLENE UDER THE ACTION OF ORGANIC PEROXIDES AND OXYGEN AS FREE-RADICAL-GENERATING POLYMERIZATION INITIATORS AND OF POLYMERIZATION MODIFIERS AT ELEVATED TEMPERATURE AND SUPERATOMSPHERIC PRESSURE IN A TUBULAR REACTOR HAVING TWO SUCCESSIVE REACTION ZONES, A MIXTURE OF ETHYLENE, POLYMERIZATION INITIATOR AND POLYMERIZATION MODIFIER BEING INTRODUCED CONTINOUSLY AT THE BEGINNING OF EACH REACTION ZONE. OXYGEN AS POLYMERIZATION INITATOR AND A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY LOW CS VALUE ARE USED IN THE FIRST REACTION ZONE, AND AN ORGANIC PEROXIDE AHVING A SPECIFIC HALF VALUE TEMPERATURE AS POLYMERIZATION INITIATOR AND A POLYMERIZATION MODIFIER HAVING A SPECIFIC RELATIVELY LOW CS VALUE ARE EMPLOYED IN THE SECOND REACTION ZONE. THE ETHYLENE HOMOPOLYMERS OBTAINED HAVE A WIDE MOLECULAR WEIGHT DISTRIBUTION AND ARE PRACTICALLY DEVOID OF VERY HIGH MOLECULAR WEIGHT CONSTITUENTS.
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公开(公告)号：US3634382A
公开(公告)日：1972-01-11
申请号：US3634382D
申请日：1969-08-01
Applicant: BASF AG
Inventor： TRIESCHMANN HANS-GEORG , RAU WOLFGANG , MUELLER-TAMM HEINZ , PFANNMUELLER HELMUT
CPC classification number: C08J3/12 , C08F8/50 , C08F110/06 , C08F2810/10 , C08J2323/12 , Y10S526/909 , C08F2/02
Abstract: PRODUCTION OF GRANULAR PROPYLENE POLYMERS IN WHICH (1) PROPYLENE IS POLYMERIZED BY MEANS OF A ZIEGLER-NATTA CATALYST IN THE ABSENCE OF SOLVENTS OR DILUENTS SO THAT A POWDERED POLYMER IS DIRECTLY OBATINED WHICH HAS SPECIAL SPECIFICATION, (2) THIS POLYMER IS GIVEN A THERMAL AND MECHANICAL AFTERTREATMENT IN A SPECAIL WAY WITHOUT THE CATALYST HAVING BEEN PREVIOUSLY DEACTVATED, AND (3) THE POLYMER THUS AFTERTREATED IS HOMOGENIZED, EXTRUDED AND GRANLUATED BY CONVENTIONAL METHODS. THE POLYMER OBTAINES IS PARTICULARLY EASY TO PROCESS.
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公开(公告)号：US3557074A
公开(公告)日：1971-01-19
申请号：US3557074D
申请日：1968-05-03
Applicant: BASF AG
Inventor： BUECHNER OSKAR , IMMEL WOLFGANG , PFANNMUELLER HELMUT , SCHMIDT-THOMEE GEORG , URBAN FRIEDRICH
Abstract: A PROCESS FOR THE PRODUCTION OF LOW MOLECULAR WEIGHT WAXY POLYTHYLENES BY POLYMERIZATION OF ETHYLENE AT ELEVATED TEMPERATURE AND SUPERATMOSPHERIC PRESSURE BY MEANS OF FREE-RADICAL INITIATORS. THE COURSE OF THE POLYMERIZATION IS INFLUENCED BY ADDING (A) HYDROGEN OR AN ALKANE AND (B) AND ALKENE.
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