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公开(公告)号：DE2420006A1
公开(公告)日：1975-11-20
申请号：DE2420006
申请日：1974-04-25
Applicant: BASF AG
Inventor： HORN PETER DIPL CHEM DR , TEEGE GERNOT DIPL CHEM DR , FLIEGE WERNER DIPL CHEM DR , WEISS FRANK DIPL ING DR , MEISSNER BERND DIPL CHEM DR
IPC: C07C205/57 , C08K5/134 , C07C69/82 , C07C69/44 , C08K5/10
Abstract: New bis-[4-(m,m'-di-tert.-butyl-p-hydroxyphenyl)-butyl-(2)] dicarboxylic acid esters which are starting materials for the manufacture of dyes, pesticides and additives for plastics, especially stabilizers for polyolefins and polyamides, and are themselves stabilizers, aging retardants or antioxidants for organic products.
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Patent Agency Ranking
公开(公告)号：DE2901776A1
公开(公告)日：1980-07-31
申请号：DE2901776
申请日：1979-01-18
Applicant: BASF AG
Inventor： THEYSOHN RAINER DIPL CHEM DR , ZEITLER GERHARD DIPL CHEM DR , WEISS FRANK DIPL ING DR , WILLING HANS ING GRAD , SEILER ERHARD DIPL CHEM DR
Abstract: A process for the preparation of finely divided polyolefin molding materials from 100 parts by weight of polyolefin and from 1 to 30 parts by weight of a conductive carbon black, with or without other additives, wherein the mixture of polyolefin powder and carbon black is compounded, in a first stage, until the crystallite melting point of the polyolefin is reached, and is then brought, in a second stage, to a temperature which is from 3 DEG to 40 DEG C. above the said crystallite melting point, after which the mixture is discharged from the mixer within from 0.5 to 30 seconds and is cooled within 120 seconds.
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公开(公告)号：DE2901759A1
公开(公告)日：1980-07-31
申请号：DE2901759
申请日：1979-01-18
Applicant: BASF AG
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公开(公告)号：DE3141507A1
公开(公告)日：1983-04-28
申请号：DE3141507
申请日：1981-10-20
Applicant: BASF AG
Inventor： WERNER MICHAEL DIPL CHEM DR , OEDER DIETER DIPL CHEM DR , WEISS FRANK DIPL ING DR , BALL WOLFGANG DIPL PHYS DR
Abstract: The invention relates to a process for the preparation of ethylene polymers in a tubular polymerisation system at pressures of from 500 to 5000 bar and temperatures of from 50 to 450 DEG C in the presence of polymerisation initiators which decompose to form free radicals, in which a mixture of ethylene, oxygen, regulator and optionally comonomers is fed to the polymerisation system at its inlet point (A) and simultaneously to a second point (C) after the inlet point along the polymerisation system, where the reaction temperature has exceeded a maximum, and in which, in addition, an initiator whose half-value temperature, measured in benzene as solvent, is above 140 DEG C is metered in at a further point (B) of the reactor, at which the temperature of the oxygen-initiated reaction has already exceeded the maximum and which is between the inlet points (A and C). The concentration of the additionally metered-in initiator is from 0.01 to 20 mol ppm, based on the entire amount of ethylene fed to the polymerisation system. The additionally metered-in initiator is an organic peroxide, an organic hydroperoxide or a mixture of organic peroxide and hydroperoxide.
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