IN172494B - - Google Patents

Info

Publication number
IN172494B
IN172494B IN1012DE1987A IN172494B IN 172494 B IN172494 B IN 172494B IN 1012DE1987 A IN1012DE1987 A IN 1012DE1987A IN 172494 B IN172494 B IN 172494B
Authority
IN
India
Prior art keywords
cyclopentane
units
butadiene
trans
ethylene
Prior art date
Application number
Other languages
English (en)
Inventor
Howard Curtis Welborn
Original Assignee
Exxon Chemical Patents Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=26324691&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=IN172494(B) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to CA000511778A priority Critical patent/CA1268754A/fr
Priority to AR304325A priority patent/AR240463A1/es
Priority to AU58914/86A priority patent/AU611384B2/en
Priority to JP61143142A priority patent/JP2556969B2/ja
Priority to EP86304806A priority patent/EP0206794B2/fr
Priority to DE3689244T priority patent/DE3689244T3/de
Application filed by Exxon Chemical Patents Inc filed Critical Exxon Chemical Patents Inc
Priority to IN1012DE1987 priority patent/IN172494B/en
Priority to PCT/US1987/003297 priority patent/WO1988004672A1/fr
Priority to JP62506320A priority patent/JP2764163B2/ja
Priority to AU12234/88A priority patent/AU616396B2/en
Priority to EP92203227A priority patent/EP0526955A1/fr
Priority to ES87311163T priority patent/ES2058131T3/es
Priority to EP87311163A priority patent/EP0275676B1/fr
Priority to DE3750506T priority patent/DE3750506T2/de
Priority to AT87311163T priority patent/ATE111114T1/de
Priority to US07/170,485 priority patent/US4808561A/en
Priority to US07/278,910 priority patent/US4897455A/en
Priority to US07/609,325 priority patent/US5191052A/en
Priority to AU70079/91A priority patent/AU624285B2/en
Publication of IN172494B publication Critical patent/IN172494B/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/16—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers
    • C08F210/18—Copolymers of ethene with alpha-alkenes, e.g. EP rubbers with non-conjugated dienes, e.g. EPT rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F210/00—Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
    • C08F210/02—Ethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/639—Component covered by group C08F4/62 containing a transition metal-carbon bond
    • C08F4/63912—Component covered by group C08F4/62 containing a transition metal-carbon bond in combination with an organoaluminium compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/639—Component covered by group C08F4/62 containing a transition metal-carbon bond
    • C08F4/63916—Component covered by group C08F4/62 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/639—Component covered by group C08F4/62 containing a transition metal-carbon bond
    • C08F4/6392—Component covered by group C08F4/62 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/65912—Component covered by group C08F4/64 containing a transition metal-carbon bond in combination with an organoaluminium compound
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/65916—Component covered by group C08F4/64 containing a transition metal-carbon bond supported on a carrier, e.g. silica, MgCl2, polymer
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F4/00—Polymerisation catalysts
    • C08F4/42—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors
    • C08F4/44—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides
    • C08F4/60—Metals; Metal hydrides; Metallo-organic compounds; Use thereof as catalyst precursors selected from light metals, zinc, cadmium, mercury, copper, silver, gold, boron, gallium, indium, thallium, rare earths or actinides together with refractory metals, iron group metals, platinum group metals, manganese, rhenium technetium or compounds thereof
    • C08F4/62—Refractory metals or compounds thereof
    • C08F4/64—Titanium, zirconium, hafnium or compounds thereof
    • C08F4/659—Component covered by group C08F4/64 containing a transition metal-carbon bond
    • C08F4/6592—Component covered by group C08F4/64 containing a transition metal-carbon bond containing at least one cyclopentadienyl ring, condensed or not, e.g. an indenyl or a fluorenyl ring

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Polyamides (AREA)
  • Materials For Medical Uses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
IN1012DE1987 1985-06-21 1987-11-27 IN172494B (fr)

Priority Applications (19)

Application Number Priority Date Filing Date Title
CA000511778A CA1268754A (fr) 1985-06-21 1986-06-17 Catalyseur de polymerisation sur support
AR304325A AR240463A1 (es) 1985-06-21 1986-06-19 Catalizador soportado para la polimerizacion de olefinas y procedimiento para prepararlos.
AU58914/86A AU611384B2 (en) 1985-06-21 1986-06-20 New supported polymerization catalyst
JP61143142A JP2556969B2 (ja) 1985-06-21 1986-06-20 新規な重合用担持触媒
EP86304806A EP0206794B2 (fr) 1985-06-21 1986-06-23 Catalyseur de polymérisation sur support
DE3689244T DE3689244T3 (de) 1985-06-21 1986-06-23 Polymerisationskatalysator auf Träger.
IN1012DE1987 IN172494B (fr) 1986-12-19 1987-11-27
AU12234/88A AU616396B2 (en) 1986-12-19 1987-12-16 Copolymers of ethylene and 1,3-butadiene
JP62506320A JP2764163B2 (ja) 1986-12-19 1987-12-16 エチレンと１，３―ブタジエンの共重合体
PCT/US1987/003297 WO1988004672A1 (fr) 1986-12-19 1987-12-16 Copolymeres d'ethylene et 1,3-butadiene
EP92203227A EP0526955A1 (fr) 1986-12-19 1987-12-18 Copolymères de l'éthylène et de 1,3-butadiène
ES87311163T ES2058131T3 (es) 1986-12-19 1987-12-18 Copolimeros de etileno y 1,3-butadieno.
EP87311163A EP0275676B1 (fr) 1986-12-19 1987-12-18 Copolymères de l'éthylène et de 1,3-butadiène
DE3750506T DE3750506T2 (de) 1986-12-19 1987-12-18 Copolymere aus Äthylen und 1,3-Butadien.
AT87311163T ATE111114T1 (de) 1986-12-19 1987-12-18 Copolymere aus äthylen und 1,3-butadien.
US07/170,485 US4808561A (en) 1985-06-21 1988-03-18 Supported polymerization catalyst
US07/278,910 US4897455A (en) 1985-06-21 1988-12-02 Polymerization process
US07/609,325 US5191052A (en) 1985-06-21 1990-11-02 Copolymers of ethylene and 1,3-butadiene
AU70079/91A AU624285B2 (en) 1985-06-21 1991-01-30 New supported polymerization catalyst

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US94438586A 1986-12-19 1986-12-19
IN1012DE1987 IN172494B (fr) 1986-12-19 1987-11-27

Publications (1)

Publication Number Publication Date
IN172494B true IN172494B (fr) 1993-09-04

Family

ID=26324691

Family Applications (1)

Application Number Title Priority Date Filing Date
IN1012DE1987 IN172494B (fr) 1985-06-21 1987-11-27

Country Status (8)

Country Link
EP (2) EP0526955A1 (fr)
JP (1) JP2764163B2 (fr)
AT (1) ATE111114T1 (fr)
AU (1) AU616396B2 (fr)
DE (1) DE3750506T2 (fr)
ES (1) ES2058131T3 (fr)
IN (1) IN172494B (fr)
WO (1) WO1988004672A1 (fr)

Families Citing this family (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5008204A (en) * 1988-02-02 1991-04-16 Exxon Chemical Patents Inc. Method for determining the compositional distribution of a crystalline copolymer
EP0358103B1 (fr) * 1988-09-05 1993-12-15 Idemitsu Kosan Company Limited Méthode pour préparer un polymère
DE4139261A1 (de) * 1991-11-29 1993-06-03 Basf Ag Ethylen-copolymerisate niederer dichte
US5763543A (en) * 1994-09-14 1998-06-09 Exxon Chemical Patents Inc. Olefin polymerization process with little or no scavenger present
US5712353A (en) * 1994-10-31 1998-01-27 Exxon Chemical Patents Inc. Gas phase polymerization process
US6300451B1 (en) 1994-10-24 2001-10-09 Exxon Chemical Patents Inc. Long-chain branched polymers and their production
CA2181413A1 (fr) * 1995-07-18 1998-01-18 Edwar S. Shamshoum Methode pour la propagation syndiotactique des olefines
US6239058B1 (en) * 1995-07-18 2001-05-29 Fina Technology, Inc. Process for activating a metallocene catalyst supported on silica
IT1276070B1 (it) 1995-10-31 1997-10-24 Siac It Additivi Carburanti Processo per la preparazione di polimeri a base di etilene a basso peso molecolare
CA2192156C (fr) * 1995-12-08 2006-07-11 Nobuhiro Tsujimoto Catalyseur et methode pour l'obtention d'un polymere dienique conjugue
SG71754A1 (en) * 1997-02-13 2000-04-18 Sumitomo Chemical Co Copolymer and copolymer composition
TWI246520B (en) 1997-04-25 2006-01-01 Mitsui Chemicals Inc Processes for olefin polymerization
DE69813958T2 (de) * 1997-07-18 2004-03-11 Mitsui Chemicals, Inc. Ungesättigte Copolymere, Verfahren zu deren Herstellung und Mischungen, die diese enthalten
JP2000063639A (ja) * 1998-08-13 2000-02-29 Mitsui Chemicals Inc α−オレフィン／共役ジエン系共重合体組成物
TW576843B (en) 1998-12-25 2004-02-21 Mitsui Chemicals Inc Olefin polymerization catalyst and process for olefin polymerization using the olefin polymerization catalyst
ITSA20010016A1 (it) 2001-06-05 2001-09-05 Univ Degli Studi Salerno Copolimeri a base di etilene contenenti anelli ciclopropanici nella catena principale.
JP2004018696A (ja) * 2002-06-17 2004-01-22 Tosoh Corp エチレン−共役ジエン系共重合体
WO2004026921A1 (fr) 2002-09-20 2004-04-01 Exxonmobil Chemical Patents Inc. Production de polymeres dans des conditions supercritiques
BRPI0513057A (pt) 2004-07-08 2008-04-22 Exxonmobil Chem Patents Inc produção de polìmero em condições supercrìticas
US8143352B2 (en) 2006-12-20 2012-03-27 Exxonmobil Research And Engineering Company Process for fluid phase in-line blending of polymers
US8080610B2 (en) 2007-03-06 2011-12-20 Exxonmobil Research And Engineering Company Monomer recycle process for fluid phase in-line blending of polymers
US7928162B2 (en) 2007-09-13 2011-04-19 Exxonmobil Research And Engineering Company In-line process for producing plasticized polymers and plasticized polymer blends
CN101855250B (zh) 2007-09-13 2013-01-02 埃克森美孚研究工程公司 增塑剂与基础聚合物的在线共混
US7910679B2 (en) 2007-12-20 2011-03-22 Exxonmobil Research And Engineering Company Bulk homogeneous polymerization process for ethylene propylene copolymers
CN101945942B (zh) 2007-12-20 2012-08-08 埃克森美孚研究工程公司 生产粒料稳定的聚烯烃的在线方法
CN103254513B (zh) 2007-12-20 2015-08-26 埃克森美孚研究工程公司 全同立构聚丙烯和乙烯-丙烯共聚物的共混物
EP2415792B1 (fr) 2009-03-30 2014-11-12 Mitsui Chemicals, Inc. Copolymère d'oléfine et de diène conjugué et son procédé de fabrication
EP2599804B1 (fr) 2010-07-30 2019-02-20 Bridgestone Corporation Copolymère, composition de caoutchouc, composition de caoutchouc réticulée et pneu
JP5775872B2 (ja) * 2010-07-30 2015-09-09 株式会社ブリヂストン 共重合体の連鎖構造を制御する方法
EP2810984B1 (fr) * 2012-01-30 2016-09-14 Bridgestone Corporation Composition de caoutchouc anti-vibration, composition de caoutchouc réticulée anti-vibration et caoutchouc anti-vibration
JP5893937B2 (ja) * 2012-01-30 2016-03-23 株式会社ブリヂストン 防振ゴム組成物、架橋防振ゴム組成物及び防振ゴム
JP5893938B2 (ja) * 2012-01-30 2016-03-23 株式会社ブリヂストン 防振ゴム組成物及び防振ゴム
EP2810985B1 (fr) * 2012-01-30 2017-04-05 Bridgestone Corporation Composition en caoutchouc d'amortissement de vibrations, composition en caoutchouc réticulé d'amortissement de vibrations et caoutchouc d'amortissement de vibrations
FR3045613B1 (fr) 2015-12-17 2017-12-15 Michelin & Cie Copolymere d'ethylene et de butadiene de microstructure homogene
FR3045612B1 (fr) 2015-12-17 2017-12-15 Michelin & Cie Copolymere d'ethylene et de butadiene de microstructure homogene
FR3045633B1 (fr) 2015-12-22 2017-12-15 Michelin & Cie Pneumatique comprenant une composition de caoutchouc comprenant un elastomere dienique substitue
FR3065215A1 (fr) 2017-04-18 2018-10-19 Compagnie Generale Des Etablissements Michelin Synthese en continu de copolymere d'ethylene et de butadiene
FR3065216A1 (fr) 2017-04-18 2018-10-19 Compagnie Generale Des Etablissements Michelin Synthese en continu de copolymere d'ethylene et de butadiene
JP2019099719A (ja) * 2017-12-05 2019-06-24 株式会社ブリヂストン 共重合体、ゴム組成物、樹脂組成物、タイヤ及び樹脂製品
JP6983048B2 (ja) * 2017-12-05 2021-12-17 株式会社ブリヂストン 共重合体、ゴム組成物、樹脂組成物、タイヤ及び樹脂製品

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Publication number Priority date Publication date Assignee Title
IT1115152B (it) * 1979-03-07 1986-02-03 Anic Spa Processo per la copolimerizzazione dell'etilene con idrocarburi pluriinsaturi
DE3007725A1 (de) * 1980-02-29 1981-09-17 Hansjörg Prof. Dr. 2000 Hamburg Sinn Verfahren zur herstellung von polyethylen, polypropylen und copolymeren
DE3035358A1 (de) * 1980-09-19 1982-05-06 Bayer Ag, 5090 Leverkusen Terpolymere aus ethylen, butadien und isopren und verfahren zu ihrer herstellung
DE3127133A1 (de) * 1981-07-09 1983-01-27 Hoechst Ag, 6000 Frankfurt Verfahren zur herstellung von polyolefinen und deren copolymerisaten
ZA844157B (en) * 1983-06-06 1986-01-29 Exxon Research Engineering Co Process and catalyst for polyolefin density and molecular weight control
CA1268754A (fr) * 1985-06-21 1990-05-08 Howard Curtis Welborn, Jr. Catalyseur de polymerisation sur support
GB2184368A (en) * 1985-11-27 1987-06-24 Dow Chemical Co High temperature continuous viscometry coupled with analytic temperature rising elution fractionation for evaluating crystalline and semi-crystalline polymers
IN172282B (fr) * 1986-12-19 1993-05-29 Exxon Chemical Patents Inc

Also Published As

Publication number Publication date
EP0526955A1 (fr) 1993-02-10
DE3750506T2 (de) 1995-01-12
AU616396B2 (en) 1991-10-31
DE3750506D1 (de) 1994-10-13
ES2058131T3 (es) 1994-11-01
JP2764163B2 (ja) 1998-06-11
JPH01501633A (ja) 1989-06-08
EP0275676A1 (fr) 1988-07-27
EP0275676B1 (fr) 1994-09-07
WO1988004672A1 (fr) 1988-06-30
ATE111114T1 (de) 1994-09-15
AU1223488A (en) 1988-07-15

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