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公开(公告)号：CA1121948A
公开(公告)日：1982-04-13
申请号：CA291855
申请日：1977-11-28
Applicant: BASF AG
Inventor： BOETTCHER KLAUS , HOERDT HEINRICH G , PFLEGER KLAUS , ZACHER WIELAND , GROPPER HANS
IPC: C08F2/00 , C08F2/02 , C08F2/34 , C08F2/38 , C08F10/00 , C08F110/02 , C08F210/02
Abstract: A process for the manufacture of ethylene polymers by polymerizing ethylene under high pressures and at high temperatures in the presence of from 0.01 to 0.5 per cent by weight of an alkyl ester (alkyl being of 1 to 8 carbon atoms) of an alkenemonocarboxylic acid of 3 or 4 carbon atoms. n-Butyl acrylate is a particularly suitable polymerization activator. Although the start temperature of the ethylene polymerization is relatively low, there is no difference in mechanical and optical properties of a blown film manufactured from the resulting ethylene polymer and of a blown film of pure polyethylene.
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公开(公告)号：FI103728B
公开(公告)日：1999-08-31
申请号：FI924388
申请日：1992-09-30
Applicant: BASF AG
Inventor： FUNK GUIDO , HEMMERICH RAINER , GROPPER HANS , KOLK ERICH , FOLLMER GODOFREDO
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公开(公告)号：CA1333825C
公开(公告)日：1995-01-03
申请号：CA551399
申请日：1987-11-09
Applicant: BASF AG
Inventor： HASENBEIN NORBERT , BAUER PETER , SCHLEMMER LOTHAR , HAUSS ALFRED F , GROPPER HANS , OHLINGER RAINER
IPC: C08F2/02 , C08F8/44 , C08F255/02 , C09J4/00 , C09J151/06
Abstract: In a process for the peroxide-free grafting of ethylenically unsaturated carboxylic acids, carboxylic anhydrides and/or their derivatives to a homopolymer or copolymer of ethylene having a density less than 0.930 g/cm3, the monomers to be grafted are used in a concentration of from 0.01 to 0.5% by weight and the grafting reaction is carried out at from 210 to 300.degree.C in a conventional extruder or mixer in the absence of a free radical initiator. The graft copolymers are used for the preparation of ionomers and adhesion promoters.
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公开(公告)号：DE59005190D1
公开(公告)日：1994-05-05
申请号：DE59005190
申请日：1990-11-12
Applicant: BASF AG
Inventor： GROPPER HANS , FUNK GUIDO , KOLK ERICH , OEDER DIETER
Abstract: The novel catalyst for the preparation of high-molecular-weight homopolymers or copolymers of ethene is obtainable by (1) treating a silicon dioxide-based support with (2) chromium trioxide or a chromium compound which can be converted into chromium dioxide under the conditions of step (3), and then (3) heating the resultant intermediate in an oxygen-containing stream of gas, where the support (1) is a specific silicic acid xerogel obtainable by extracting a maximum of 30% of water from a silicic acid hydrogel by means of alkanols, alkanones or mixtures thereof, and subsequently drying, comminuting and fractionating the product.
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公开(公告)号：AT103615T
公开(公告)日：1994-04-15
申请号：AT90121605
申请日：1990-11-12
Applicant: BASF AG
Inventor： GROPPER HANS , FUNK GUIDO , KOLK ERICH , OEDER DIETER
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Patent Agency Ranking
公开(公告)号：FI103728B1
公开(公告)日：1999-08-31
申请号：FI924388
申请日：1992-09-30
Applicant: BASF AG
Inventor： FUNK GUIDO , HEMMERICH RAINER , GROPPER HANS , KOLK ERICH , FOLLMER GODOFREDO
Abstract: In a new process for the preparation of a supported catalyst for the polymerisation of alpha -olefins, first a support gel (1) is prepared by introducing a sodium water glass or potassium water glass solution into a swirling stream of an aqueous mineral acid optionally containing aluminium ions longitudinally and tangentially to the stream, spraying the resultant silicic acid hydrosol in drop form into a gaseous medium, and allowing it to solidify to form a hydrogel, and freeing the resultant hydrogel, without prior ageing, from salts by washing and optionally from some of the water by extraction with alcohols and/or ketones, and then drying the hydrogel. This gives the support gel (1), which is ground and fractionated according to particle size. In a second process step, the support gel (1) is charged with chromium trioxide or with a chromium compound which can be converted into chromium trioxide, after which the resultant chromium-containing support gel (2) is heated at from 400 to 1100 DEG C for from 10 to 1000 minutes in an anhydrous gas stream containing oxygen in a concentration greater than 10% by volume. It is essential for the process according to the invention that the drying of the hydrogel to form the support gel (1) takes place in a high-speed drier within a maximum time of 300 seconds at an inlet temperature of from 200 to 600 DEG C. The supported catalyst prepared in this way gives homopolymers and copolymers of ethylene having excellent low-temperature toughness.
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公开(公告)号：CA1333826C
公开(公告)日：1995-01-03
申请号：CA551584
申请日：1987-11-06
Applicant: BASF AG
Inventor： HASENBEIN NORBERT , BAUER PETER , SCHLEMMER LOTHAR , HAUSS ALFRED F , GROPPER HANS , OHLINGER RAINER
IPC: C08F2/02 , C08F8/44 , C08F255/02 , C09J4/00 , C09J151/06
Abstract: In a process for the peroxide-free grafting of ethylenically unsaturated carboxylic acids, carboxylic anhydrides and/or their derivatives to a homopolymer or copolymer of ethylene having a density equal to or greater than 0.930 g/cm3, the monomers to be grafted are used in a concentration of from 0.01 to 0.5% by weight and the grafting reaction is carried out at from 210 to 300.degree.C in a conventional extruder or mixer in the absence of a free radical initiator. The graft copolymers are used for the preparation of ionomers and adhesion promoters.
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公开(公告)号：DE3938723A1
公开(公告)日：1991-05-29
申请号：DE3938723
申请日：1989-11-23
Applicant: BASF AG
Inventor： GROPPER HANS , FUNK GUIDO , KOLK ERICH , OEDER DIETER
Abstract: The novel catalyst for the preparation of high-molecular-weight homopolymers or copolymers of ethene is obtainable by (1) treating a silicon dioxide-based support with (2) chromium trioxide or a chromium compound which can be converted into chromium dioxide under the conditions of step (3), and then (3) heating the resultant intermediate in an oxygen-containing stream of gas, where the support (1) is a specific silicic acid xerogel obtainable by extracting a maximum of 30% of water from a silicic acid hydrogel by means of alkanols, alkanones or mixtures thereof, and subsequently drying, comminuting and fractionating the product.
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公开(公告)号：CA1100690A
公开(公告)日：1981-05-05
申请号：CA252137
申请日：1976-05-10
Applicant: BASF AG
Inventor： MIETZNER FRANZ G , PFLEGER KLAUS , GROPPER HANS , BUECHNER OSKAR , BOETTCHER KLAUS , ZACHER WIELAND
IPC: C08F6/00 , C08F6/06 , C08F6/26 , C08F10/00 , C08F210/00 , C08F210/02 , C08F218/00 , C08F218/02 , C08F2/00
Abstract: A process for the manufacture of copolymers of ethylene with vinyl acetate at pressures above 800 atmospheres and at from 150 to 350.degree.C, using mean residence times of up to at most 100 seconds. The reaction mixture obtained from the polymerization is kept for from 2 to 10 minutes at from 150 to 250.degree.C under a pressure below 500 atmospheres. Homogeneous ethylene/ vinyl acetate copolymers are obtained without the formation of substantial amounts of free acetic acid by decomposition of the vinyl acetate.
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公开(公告)号：CA1080895A
公开(公告)日：1980-07-01
申请号：CA281927
申请日：1977-07-04
Applicant: BASF AG
Inventor： BECKER ROLF , BORHO KLAUS , BUECHNER OSKAR , GROPPER HANS , HARTIG ULRICH
Abstract: O.Z. 32,091 The invention relates to a process for rapidly letting-down the pressure in continuous high pressure polymerization systems for the polymerization of ethylene. In this process, the let-down hot reaction mixture is passed into an expansion vessel in such a way that the jet of let-down hot reaction mixture issuing from the let-down line is led into the partially water-filled expansion vessel at an angle of from 0 to 45.degree. to the water surface, so that the jet does not enter below the surface but must touch or strike it. The method described makes it possible to let the mixture down partially and thus to slow down the decomposition in the case of explosive decomposition reactions occurring in the polymerization system.
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