JPH0246616B2 - - Google Patents
Info
- Publication number
- JPH0246616B2 JPH0246616B2 JP56173165A JP17316581A JPH0246616B2 JP H0246616 B2 JPH0246616 B2 JP H0246616B2 JP 56173165 A JP56173165 A JP 56173165A JP 17316581 A JP17316581 A JP 17316581A JP H0246616 B2 JPH0246616 B2 JP H0246616B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- molding composition
- polysiloxane
- parts
- composition according
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
- 239000000203 mixture Substances 0.000 claims description 119
- -1 polydimethylsiloxane Polymers 0.000 claims description 91
- 238000000465 moulding Methods 0.000 claims description 78
- 239000004800 polyvinyl chloride Substances 0.000 claims description 78
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 77
- 229920001296 polysiloxane Polymers 0.000 claims description 68
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 36
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 31
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 17
- 229920000578 graft copolymer Polymers 0.000 claims description 17
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims description 13
- 239000004609 Impact Modifier Substances 0.000 claims description 12
- 239000007788 liquid Substances 0.000 claims description 12
- 239000007787 solid Substances 0.000 claims description 12
- 239000004709 Chlorinated polyethylene Substances 0.000 claims description 11
- 229920000642 polymer Polymers 0.000 claims description 11
- 239000004205 dimethyl polysiloxane Substances 0.000 claims description 10
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 9
- 239000000654 additive Substances 0.000 claims description 6
- 229920001921 poly-methyl-phenyl-siloxane Polymers 0.000 claims description 4
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 4
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 claims description 3
- 239000000460 chlorine Substances 0.000 claims description 3
- 229910052801 chlorine Inorganic materials 0.000 claims description 3
- 229920001567 vinyl ester resin Polymers 0.000 claims description 3
- 238000012360 testing method Methods 0.000 description 24
- 238000012545 processing Methods 0.000 description 22
- 238000004519 manufacturing process Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- 239000003381 stabilizer Substances 0.000 description 12
- 239000000047 product Substances 0.000 description 11
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 10
- 238000001125 extrusion Methods 0.000 description 9
- 238000005096 rolling process Methods 0.000 description 9
- 238000002360 preparation method Methods 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 7
- 235000013870 dimethyl polysiloxane Nutrition 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 239000000945 filler Substances 0.000 description 7
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 6
- 239000013065 commercial product Substances 0.000 description 6
- 238000007580 dry-mixing Methods 0.000 description 6
- 239000000314 lubricant Substances 0.000 description 6
- 239000000843 powder Substances 0.000 description 6
- 239000000725 suspension Substances 0.000 description 6
- CXWXQJXEFPUFDZ-UHFFFAOYSA-N tetralin Chemical compound C1=CC=C2CCCCC2=C1 CXWXQJXEFPUFDZ-UHFFFAOYSA-N 0.000 description 6
- 229910052788 barium Inorganic materials 0.000 description 5
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 5
- 239000008187 granular material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 4
- 239000004164 Wax ester Substances 0.000 description 4
- 229910052793 cadmium Inorganic materials 0.000 description 4
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- 238000010559 graft polymerization reaction Methods 0.000 description 4
- VLHZUYUOEGBBJB-UHFFFAOYSA-N hydroxy stearic acid Natural products OCCCCCCCCCCCCCCCCCC(O)=O VLHZUYUOEGBBJB-UHFFFAOYSA-N 0.000 description 4
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 4
- 239000000049 pigment Substances 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 235000012424 soybean oil Nutrition 0.000 description 4
- 239000003549 soybean oil Substances 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 239000004408 titanium dioxide Substances 0.000 description 4
- 235000019386 wax ester Nutrition 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 230000032683 aging Effects 0.000 description 3
- 229910000019 calcium carbonate Inorganic materials 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 238000006116 polymerization reaction Methods 0.000 description 3
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical class [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- DQXBYHZEEUGOBF-UHFFFAOYSA-N but-3-enoic acid;ethene Chemical compound C=C.OC(=O)CC=C DQXBYHZEEUGOBF-UHFFFAOYSA-N 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- HGQSXVKHVMGQRG-UHFFFAOYSA-N dioctyltin Chemical compound CCCCCCCC[Sn]CCCCCCCC HGQSXVKHVMGQRG-UHFFFAOYSA-N 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 238000005469 granulation Methods 0.000 description 2
- 230000003179 granulation Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000003607 modifier Substances 0.000 description 2
- 229920000058 polyacrylate Polymers 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 150000004760 silicates Chemical class 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Chemical class 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000006057 Non-nutritive feed additive Substances 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000002051 biphasic effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- ZSBRYDJXHOFQMW-UHFFFAOYSA-N chloroethene;ethene;ethenyl acetate Chemical compound C=C.ClC=C.CC(=O)OC=C ZSBRYDJXHOFQMW-UHFFFAOYSA-N 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920000609 methyl cellulose Polymers 0.000 description 1
- 239000001923 methylcellulose Substances 0.000 description 1
- 235000010981 methylcellulose Nutrition 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005022 packaging material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000344 soap Substances 0.000 description 1
- 159000000000 sodium salts Chemical class 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 241000894007 species Species 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 229920001897 terpolymer Polymers 0.000 description 1
- 150000003606 tin compounds Chemical class 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000001993 wax Substances 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
- C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08L27/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
- C08L51/003—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to macromolecular compounds obtained by reactions only involving unsaturated carbon-to-carbon bonds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
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Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803041231 DE3041231A1 (de) | 1980-11-03 | 1980-11-03 | Polyvinylchlorid-formmasse |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57105440A JPS57105440A (en) | 1982-06-30 |
JPH0246616B2 true JPH0246616B2 (ja) | 1990-10-16 |
Family
ID=6115744
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56173165A Granted JPS57105440A (en) | 1980-11-03 | 1981-10-30 | Vinyl chloride forming composition |
Country Status (4)
Country | Link |
---|---|
US (1) | US4381361A (ja) |
EP (1) | EP0051770B1 (ja) |
JP (1) | JPS57105440A (ja) |
DE (2) | DE3041231A1 (ja) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3524302C2 (de) * | 1985-07-06 | 1993-10-14 | Hoechst Ag | SinterfÀhige, feinteilige Formmasse auf Basis von Vinylchlorid-Polymerisaten |
JPS63108067A (ja) * | 1986-10-24 | 1988-05-12 | Showa Denko Kk | æš¹èçµæç© |
DE69009889T2 (de) * | 1989-07-27 | 1995-01-26 | Tosoh Corp | Klebfreie Verbundwerkstoffharzzusammensetzung und Verfahren zu ihrer Herstellung. |
US5360853A (en) * | 1991-06-10 | 1994-11-01 | Shin-Etsu Chemical Co., Ltd. | Polyvinyl chloride-based resin composition |
US5356585A (en) * | 1993-07-01 | 1994-10-18 | Dow Corning Corporation | Process of extruding snythetic thermoplastic resins using organosilicon resinous compositions as extrusion lubricants |
EP0695782B1 (en) * | 1994-08-05 | 1998-11-18 | The B.F. Goodrich Company | Chlorinated polyvinyl chloride compounds having improved stability, toughness and a low rate of heat release and smoke generation |
US5821304A (en) * | 1996-05-24 | 1998-10-13 | The B. F. Goodrich Company | Chlorinated polyvinyl chloride compound having excellent physical, chemical resistance and processing properties |
US6187868B1 (en) | 1996-05-24 | 2001-02-13 | The B. F. Goodrich Company | Chlorinated polyvinyl chloride compound having excellent physical, chemical resistance and processing properties |
US5981663A (en) * | 1996-05-24 | 1999-11-09 | The B.F. Goodrich Company | Chlorinated polyvinyl chloride compound having excellent physical, chemical resistance and processing properties |
KR100398741B1 (ko) * | 1998-11-20 | 2003-12-24 | 죌ìíì¬ ìì§íí | ìŒíë¹ëê³ìì§ìì ì¡°ë°©ë² |
KR100899985B1 (ko) * | 2006-06-12 | 2009-05-28 | 죌ìíì¬ ìì§íí | íí ì€í©ì ìí ìŒí ë¹ëê³ ì€í©ì²Žì ì ì¡° ë°©ë² |
WO2008023870A1 (en) * | 2006-08-22 | 2008-02-28 | Lg Chem, Ltd. | Method of preparing vinyl chloride polymer having superior processability |
KR100983702B1 (ko) * | 2006-08-22 | 2010-09-24 | 죌ìíì¬ ìì§íí | ê°ê³µì±ìŽ ì°ìí ìŒíë¹ëê³ ì€í©ì²Žì ì ì¡°ë°©ë² |
KR20220044981A (ko) * | 2019-08-07 | 2022-04-12 | ë€ì° ì€ëŠ¬ìœìŠ ìœí¬ë ìŽì | ëì 묎Ʞ 충ì ì íšë ë° íìŽëë¡ì€-ìì©ì± ì€ë¥Žê°ë žíŽëŠ¬ì€ë¡ì°ì í¬íšíë pvc |
US20220275188A1 (en) * | 2019-08-07 | 2022-09-01 | Rohm And Haas Company | Pvc composition, polymer composite article formed therewith, and method of preparing same |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5217554A (en) * | 1975-07-30 | 1977-02-09 | Wacker Chemie Gmbh | Impact resistant molding material comprising main component of polyvinyl chloride |
JPS5591663A (en) * | 1978-12-30 | 1980-07-11 | Kasei Co C I | Coating material for agriculture and method of using said material |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3010931A (en) * | 1958-12-08 | 1961-11-28 | Monsanto Chemicals | Resinous composition comprising a vinyl halide polymer and a nitroethylbenzene |
GB887669A (en) * | 1959-04-15 | 1962-01-24 | Ici Ltd | Polyvinyl chloride compositions |
NL120729C (ja) * | 1959-04-18 | |||
US3318659A (en) * | 1962-11-14 | 1967-05-09 | Joel B Bullock | Process of treating cellulose textiles with polyvinyl chloride polymers, a polysiloxane and zirconium acetate and optionally with flame resistant and rot resistant agents |
US3428707A (en) * | 1965-05-10 | 1969-02-18 | Dow Chemical Co | Modified vinyl chloride polymer compositions |
GB1257304A (ja) * | 1968-03-29 | 1971-12-15 | ||
US4177182A (en) * | 1974-10-28 | 1979-12-04 | Terumo Corp. | Polyvinyl chloride series resin medical product implements and method of manufacturing the same using siloxane oil additive |
JPS5367736A (en) * | 1976-11-29 | 1978-06-16 | Shinetsu Polymer Co | Resin composition for strippable coating and method of making same |
-
1980
- 1980-11-03 DE DE19803041231 patent/DE3041231A1/de not_active Withdrawn
-
1981
- 1981-10-22 EP EP81108680A patent/EP0051770B1/de not_active Expired
- 1981-10-22 DE DE8181108680T patent/DE3170417D1/de not_active Expired
- 1981-10-28 US US06/315,620 patent/US4381361A/en not_active Expired - Fee Related
- 1981-10-30 JP JP56173165A patent/JPS57105440A/ja active Granted
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5217554A (en) * | 1975-07-30 | 1977-02-09 | Wacker Chemie Gmbh | Impact resistant molding material comprising main component of polyvinyl chloride |
JPS5591663A (en) * | 1978-12-30 | 1980-07-11 | Kasei Co C I | Coating material for agriculture and method of using said material |
Also Published As
Publication number | Publication date |
---|---|
EP0051770B1 (de) | 1985-05-08 |
JPS57105440A (en) | 1982-06-30 |
DE3170417D1 (en) | 1985-06-13 |
EP0051770A2 (de) | 1982-05-19 |
DE3041231A1 (de) | 1982-06-09 |
EP0051770A3 (en) | 1982-09-08 |
US4381361A (en) | 1983-04-26 |
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