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公开(公告)号：ZA959242B
公开(公告)日：1996-05-15
申请号：ZA959242
申请日：1995-11-02
Applicant: HOECHST AG
Inventor： BRAUERS WERNER , BERTHOLD JOACHIM
Abstract: Polyolefin moulding materials with a reduced tendency to peeling consist of an olefin polymer and 0.001-5 phr of an oxidised wax (I). Also claimed is a process for reducing peeling in the extrusion of polyolefin moulding materials, by adding 0.001-5 phr (I) to the material. Pref. (I) is an oxidised polyolefin wax. Pref. moulding material is based on polyethylene, propylene, polybutene-1, polyhexene-1, poly-4-methylpentene-1, polyoctene-1 or copolymers thereof.
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公开(公告)号：ZA9472B
公开(公告)日：1994-08-17
申请号：ZA9472
申请日：1994-01-06
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , BOEHM LUDWIG , HERRMANN HANS-FRIEDRICH , HOHNER GERD , LECHT RAINER , VETTER HANS JOACHIM
Abstract: A catalyst formed by reacting a magnesium alkoxide dispersion whose particle size is from 100 to 3000 nm with a compound of a metal from the group consisting of titanium, zirconium, vanadium and chromium and then with a chlorine-containing organoaluminium compound has very good hydrogen sensitivity and high activity even in the presence of molecular weight regulators such as hydrogen. This makes the catalyst highly suitable for the preparation of low-molecular-weight polyolefins. The catalyst enables the preparation of waxes having a reduced residual ash content. The large particle diameter and the low fines content of the polymer powder prepared by suspension polymerisation using this catalyst enable ready separation and drying of the suspension medium. The catalyst is furthermore advantageous in solution polymerisation and, due to the large particle diameter, can be used in gas-phase polymerisation for the preparation of low-molecular-weight poly-1-olefins.
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公开(公告)号：AU550824B2
公开(公告)日：1986-04-10
申请号：AU8499382
申请日：1982-06-18
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , DIEDRICH BERND , FRANKE RAINER , HARTLAPP JURGEN , SCHAFER WERNER , STOBEL WOLFGANG
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公开(公告)号：BR8203589A
公开(公告)日：1983-06-14
申请号：BR8203589
申请日：1982-06-18
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , DIEDRICH BERND , FRANKE RAINER , HARTLAPP JURGEN , SCHAFER WERNER , STROBEL WOLFGANG
Abstract: Polyolefins having a broad molecular weight distribution are obtained in a very high yield even using a catalyst based on a reaction product of a magnesium alcoholate with titanium tetrachloride, if the hydrocarbon-insoluble product of the reaction of the magnesium alcoholate with titanium tetrachloride is heated to a fairly high temperature with a chloroalkoxytitanate, in order to split off alkyl chlorides.
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公开(公告)号：AU8499482A
公开(公告)日：1983-01-06
申请号：AU8499482
申请日：1982-06-18
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , DIEDRICH BERND , FRANKE RAINER , HARTLAPP JURGEN , SCHAFER WERNER , STROBEL WOLFGANG
IPC: C08F4/00 , C08F4/10 , C08F4/16 , C08F4/44 , C08F4/60 , C08F4/64 , C08F4/658 , C08F10/00 , C08F4/66 , C08F110/02 , C08F210/16
Abstract: Polyolefins having a broad molecular weight distribution are obtained in a very high yield even using a catalyst based on a reaction product of a magnesium alcoholate with titanium tetrachloride, if the hydrocarbon-insoluble product of the reaction of the magnesium alcoholate with titanium tetrachloride is heated to a fairly high temperature with a chloroalkoxytitanate, in order to split off alkyl chlorides.
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Patent Agency Ranking
公开(公告)号：SG77573A1
公开(公告)日：2001-01-16
申请号：SG1996009544
申请日：1996-04-26
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , BOHM LUDWIG , BREUERS WERNER , ENDERLE JOHANNES FRIEDRICH , FLEIBNER MANFRED , RAINER LEICHT , LUKER HARTMUT , SCHULTE ULRICH , BROMSTRUP HEINER
Abstract: High-strength tubing made of ethylene polymer (PE) with a bimodal mol. wt. distribution is claimed. It has stress cracking resistance ≥ 1400 h and fracture toughness ≥ 7 mJ/mm .
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公开(公告)号：AU707533B2
公开(公告)日：1999-07-15
申请号：AU5087496
申请日：1996-04-24
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , BOHM LUDWIG , BREUERS WERNER , ENDERLE JOHANNES FRIEDRICH , FLEISSNER MANFRED , LECHT RAINER , LUKER HARTMUT , SCHULTE ULRICH , BROMSTRUP HEINER
Abstract: High-strength tubing made of ethylene polymer (PE) with a bimodal mol. wt. distribution is claimed. It has stress cracking resistance ≥ 1400 h and fracture toughness ≥ 7 mJ/mm .
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公开(公告)号：HU9601093A2
公开(公告)日：1997-02-28
申请号：HU9601093
申请日：1996-04-26
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , BREUERS WERNER , BROEMSTRUP HEINER , BOEHM LUDWIG , ENDERLE JOHANNES-FRIDRICH , FLEISSNER MANFRED , LECHT RAINER , LUEKER HARTMUT , SCHULTE ULRICH
Abstract: High-strength tubing made of ethylene polymer (PE) with a bimodal mol. wt. distribution is claimed. It has stress cracking resistance ≥ 1400 h and fracture toughness ≥ 7 mJ/mm .
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公开(公告)号：ZA9603336B
公开(公告)日：1996-11-04
申请号：ZA9603336
申请日：1996-04-26
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , BOEHM LUDWIG , BREUERS WERNER , ENDERLE JOHANNES FRIEDRICH , FLEISSNER MANFRED , LECHT RAINER , LUEKER HARTMUT , SCHULTE ULRICH , BROEMSTRUP HEINER
CPC classification number: F16L9/127 , C08L23/0807 , F16L9/12 , Y10S138/07 , Y10T428/1352 , Y10T428/139 , Y10T428/1397
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公开(公告)号：CA2175158A1
公开(公告)日：1996-10-29
申请号：CA2175158
申请日：1996-04-26
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM , BOEHM LUDWIG , BREUERS WERNER , ENDERLE JOHANNES FRIEDRICH , FLEIBETANER MANFRED , LECHT RAINER , LUEKER HARTMUT , SCHULTE ULRICH , BROEMSTRUP HEINER
Abstract: The invention relates to a high strength pipe of ethylene polymer having a bimodal molecular weight distribution. Such pipe has a stress cracking resistance of mJ/mm2 and a modulus of creep in flexure, measured according to DIN 54852-Z4, of according to the invention is produced from an ethylene polymer in which the ratio of weight of the low molecular weight fraction to the weight of the higher molecular weight fraction is in the range from 0.5 to 2.0 and which has a melt flow index MFI5/190 .degree.C of g/10 min. It is particularly suitable for the transportation of gases and water.
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