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公开(公告)号：CZ122196A3
公开(公告)日：1996-11-13
申请号：CZ122196
申请日：1996-04-26
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM DR , BOHM LUDWIG DR , BREUERS WERNER DR , ENDERLE JOHANNES-FRIEDRICH DR , FLEISSNER MANFRED DR , LECHT RAINER DR , LUKER HARTMUT DR , 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：CZ9400027A3
公开(公告)日：1994-07-13
申请号：CZ2794
申请日：1994-01-06
Applicant: HOECHST AG
Inventor： BOHM LUDWIG DR , HERRMANN HANS-FRIEDRICH DR , BERTHOLD JOACHIM DR , HOHNER GERD DR , LECHT RAINER DR , VETTER HANS JOACHIM DR
CPC classification number: C08F10/00 , Y10S526/905 , C08F4/6155 , C08F4/6555
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公开(公告)号：DE3124223A1
公开(公告)日：1982-12-30
申请号：DE3124223
申请日：1981-06-20
Applicant: HOECHST AG
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公开(公告)号：DE4439248A1
公开(公告)日：1996-05-09
申请号：DE4439248
申请日：1994-11-03
Applicant: HOECHST AG
Inventor： BREUERS WERNER DR , BERTHOLD JOACHIM DR
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：CZ2794A3
公开(公告)日：1994-07-13
申请号：CZ2794
申请日：1994-01-06
Applicant: HOECHST AG
Inventor： BOHM LUDWIG DR , HERRMANN HANS-FRIEDRICH DR , BERTHOLD JOACHIM DR , HOHNER GERD DR , LECHT RAINER DR , VETTER HANS JOACHIM DR
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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Patent Agency Ranking
公开(公告)号：GR3035998T3
公开(公告)日：2001-09-28
申请号：GR20010400851
申请日：2001-06-06
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM DR , BOEHM LUDWIG DR , BREUERS WERNER DR , ENDERLE JOHANNES FRIEDRICH DR , FLEISSNER MANFRED DR , LECHT RAINER DR , LUEKER HARTMUT DR , SCHULTE ULRICH DL , BROEMSTRUP HEINER DL
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：DE19515678A1
公开(公告)日：1996-10-31
申请号：DE19515678
申请日：1995-04-28
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM DR , BOEHM LUDWIG DR , BREUERS WERNER DR , ENDERLE HANS-FRIEDER DR , FLEISNER MANFRED DR , LECHT RAINER DR , LUEKER HARTMUT DR , SCHULTE ULRICH DIPL ING , BROEMSTRUP HEINER DIPL ING
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：DE3124222A1
公开(公告)日：1983-02-03
申请号：DE3124222
申请日：1981-06-20
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM DR , DIEDRICH BERND DR , FRANKE RAINER DR , HARTLAPP JUERGEN DR , SCHAEFER WERNER DR , STROBEL WOLFGANG DR
IPC: C08F4/00 , C08F4/10 , C08F4/16 , C08F4/44 , C08F4/60 , C08F4/64 , C08F4/658 , C08F10/00 , C08F4/52
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：BR9400034A
公开(公告)日：1994-07-26
申请号：BR9400034
申请日：1994-01-06
Applicant: HOECHST AG
Inventor： BOEHM LUDWIG DR , HERRMANN HANS-FRIEDRICH DR , BERTHOLD JOACHIM DR , HOHNER GERD DR , LECGT RAINER DR , VETTER HANS JOACHIM DR
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：CZ290303B6
公开(公告)日：2002-07-17
申请号：CZ122196
申请日：1996-04-26
Applicant: HOECHST AG
Inventor： BERTHOLD JOACHIM DR , BOHM LUDWIG DR , BREUERS WERNER DR , ENDERLE JOHANNES-FRIEDRICH DR , FLEISSNER MANFRED DR , LECHT RAINER DR , LUKER HARTMUT DR , SCHULTE ULRICH , BROMSTRUP HEINER
Abstract: Disclosed are high-strength tubes of ethylene polymer with bimodal distribution of molar weights, which have resistance to tension crack occurrence greater than or equal to 1400 h, fracture toughness greater than or equal to 7 mJ/mme2 and bending flow module, measured according to ISO 54852-Z4, greater than or equal to 1100 N/mme2. The tube is made of ethylene polymer, in which the ratio of low-molecular portion weight to higher-molecular portion is within the range of from about 0.5 to about 2.0 and flow index (MFI) of which (5/190 degC) is less than or equal to 0.35 g/10 minutes. The tube is used particularly for transportation of gases and water.
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