DE69119633D1 - Verfahren zur Herstellung von Polymerteilchen mit kontollierter, gleichförmiger Teilchengrösse - Google Patents
Verfahren zur Herstellung von Polymerteilchen mit kontollierter, gleichförmiger TeilchengrösseInfo
- Publication number
- DE69119633D1 DE69119633D1 DE69119633T DE69119633T DE69119633D1 DE 69119633 D1 DE69119633 D1 DE 69119633D1 DE 69119633 T DE69119633 T DE 69119633T DE 69119633 T DE69119633 T DE 69119633T DE 69119633 D1 DE69119633 D1 DE 69119633D1
- Authority
- DE
- Germany
- Prior art keywords
- polymer particles
- particle size
- dispersion
- production
- controlled
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
-
- 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
- C08F257/00—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00
- C08F257/02—Macromolecular compounds obtained by polymerising monomers on to polymers of aromatic monomers as defined in group C08F12/00 on to polymers of styrene or alkyl-substituted styrenes
-
- 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
- C08F291/00—Macromolecular compounds obtained by polymerising monomers on to macromolecular compounds according to more than one of the groups C08F251/00 - C08F289/00
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US49737790A | 1990-03-22 | 1990-03-22 | |
| US07/662,872 US5147937A (en) | 1990-03-22 | 1991-03-01 | Process for making controlled, uniform-sized particles in the 1 to 50 micrometer range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE69119633D1 true DE69119633D1 (de) | 1996-06-27 |
| DE69119633T2 DE69119633T2 (de) | 1997-01-23 |
Family
ID=27052479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE69119633T Expired - Lifetime DE69119633T2 (de) | 1990-03-22 | 1991-03-20 | Verfahren zur Herstellung von Polymerteilchen mit kontollierter, gleichförmiger Teilchengrösse |
Country Status (20)
| Country | Link |
|---|---|
| US (1) | US5147937A (de) |
| EP (1) | EP0448391B1 (de) |
| JP (1) | JP3055071B2 (de) |
| KR (1) | KR0171604B1 (de) |
| CN (1) | CN1038756C (de) |
| AT (1) | ATE138400T1 (de) |
| AU (1) | AU648293B2 (de) |
| BR (1) | BR9101115A (de) |
| CA (1) | CA2038502C (de) |
| CZ (1) | CZ280984B6 (de) |
| DE (1) | DE69119633T2 (de) |
| FI (1) | FI911386A (de) |
| HU (1) | HUT61781A (de) |
| IE (1) | IE910947A1 (de) |
| IL (1) | IL97610A (de) |
| MX (1) | MX173510B (de) |
| NO (1) | NO911076L (de) |
| NZ (1) | NZ237483A (de) |
| PL (1) | PL289528A1 (de) |
| PT (1) | PT97102A (de) |
Families Citing this family (84)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69117457T2 (de) * | 1990-12-10 | 1996-10-24 | Idemitsu Kosan Co | Pfropfcopolymer und Verfahren zu seiner Herstellung |
| US5677407A (en) * | 1995-06-07 | 1997-10-14 | Amcol International Corporation | Process for producing an oil sorbent polymer and the product thereof |
| US5837790A (en) | 1994-10-24 | 1998-11-17 | Amcol International Corporation | Precipitation polymerization process for producing an oil adsorbent polymer capable of entrapping solid particles and liquids and the product thereof |
| US6107429A (en) * | 1994-10-24 | 2000-08-22 | Amcol International Corporation | Process for producing an oil and water adsorbent polymer capable of entrapping solid particles and liquids and the product thereof |
| US5830967A (en) * | 1994-10-24 | 1998-11-03 | Amcol International Corporation | Process for producing an oil and water adsorbent polymer capable of entrapping solid particles and liquids and the product thereof |
| US5712358A (en) * | 1995-06-07 | 1998-01-27 | Amcol International Corporation | Process for producing an oil sorbent copolymer and the product thereof |
| US6037058A (en) * | 1995-10-12 | 2000-03-14 | Rohms And Haas Company | Particles and droplets containing liquid domains and method for forming in an acueous medium |
| US5835174A (en) * | 1995-10-12 | 1998-11-10 | Rohm And Haas Company | Droplets and particles containing liquid crystal and films and apparatus containing the same |
| EP0877764B1 (de) * | 1996-01-31 | 1999-11-24 | Eastman Chemical Company | Polyester/acryl hybridlatex mit einer kleinen teilchengrösse |
| US5978541A (en) * | 1996-04-16 | 1999-11-02 | Miravant Systems, Inc. | Custom cylindrical diffusion tips |
| NO308414B1 (no) | 1996-04-23 | 2000-09-11 | Polymers Holding As | Fremgangsmate for fremstilling av PVC-partikler, anvendelse av PVC-partiklene, samt PVC-partiklene som sadan |
| US5846657A (en) * | 1996-07-25 | 1998-12-08 | Rohm And Haas Company | Liquid crystal displays containing spacers and methods for producing the spacer |
| US5972363A (en) * | 1997-04-11 | 1999-10-26 | Rohm And Haas Company | Use of an encapsulated bioactive composition |
| DE19736094A1 (de) * | 1997-08-20 | 1999-02-25 | Agfa Gevaert Ag | Verfahren zur Herstellung von kugelförmigen Polymerisaten |
| GB9721603D0 (en) | 1997-10-10 | 1997-12-10 | Dyno Ind Asa | Method |
| US20020197469A1 (en) | 1998-10-26 | 2002-12-26 | Richard Roy Clikeman | Particles and a process for preparing the same |
| DE19817679A1 (de) | 1998-04-21 | 1999-10-28 | Bayer Ag | Verfahren zur Herstellung osmotisch und mechanisch stabiler gelförmiger Anionenaustauscher |
| DE19848897A1 (de) | 1998-10-23 | 2000-04-27 | Agfa Gevaert Ag | Herstellung monodisperser kugelförmiger Polymerisate |
| KR100377860B1 (ko) * | 1999-02-10 | 2003-03-29 | 주식회사 엘지화학 | 열가소성 수지의 분체 제조 방법 |
| NO310561B1 (no) * | 1999-09-13 | 2001-07-23 | Polymers Holding As | Ett trinns seed polymerisasjon for fremstilling av store polymerartikler med en smal storrelsesfordeling |
| US6355697B2 (en) | 1999-12-29 | 2002-03-12 | Styrochem Delaware, Inc. | Processes for forming styrenic polymers |
| US6360807B2 (en) | 1999-12-29 | 2002-03-26 | Styrochem Delaware, Inc. | Processes for forming styrenic copolymers |
| US6710094B2 (en) | 1999-12-29 | 2004-03-23 | Styrochem Delaware, Inc. | Processes for preparing patterns for use in metal castings |
| US6502621B2 (en) | 1999-12-29 | 2003-01-07 | Styrochem Delaware, Inc. | Processes for forming styrene/methyl methacrylate copolymers |
| ES2551164T3 (es) | 2000-03-24 | 2015-11-16 | Biosphere Medical, Inc. | Microesferas para embolización activa |
| US6750050B2 (en) * | 2000-10-19 | 2004-06-15 | Rohm And Haas Company | Porous non-friable polymer film |
| DE10056193A1 (de) * | 2000-11-13 | 2002-05-29 | Bayer Ag | Zuckersaftentfärbung mittels monodisperser Anionenaustauscher |
| NO315947B1 (no) * | 2001-08-31 | 2003-11-17 | Polymers Holding As | Anvendelse av sfaeriske og monodisperse polymerpartikler i rengjoringsmidler, og slike rengjoringsmidler |
| US7462366B2 (en) | 2002-03-29 | 2008-12-09 | Boston Scientific Scimed, Inc. | Drug delivery particle |
| US7131997B2 (en) | 2002-03-29 | 2006-11-07 | Scimed Life Systems, Inc. | Tissue treatment |
| US7094369B2 (en) | 2002-03-29 | 2006-08-22 | Scimed Life Systems, Inc. | Processes for manufacturing polymeric microspheres |
| US7053134B2 (en) | 2002-04-04 | 2006-05-30 | Scimed Life Systems, Inc. | Forming a chemically cross-linked particle of a desired shape and diameter |
| AU2003240000A1 (en) | 2002-06-12 | 2003-12-31 | Boston Scientific Limited | Bulking agents |
| US7842377B2 (en) | 2003-08-08 | 2010-11-30 | Boston Scientific Scimed, Inc. | Porous polymeric particle comprising polyvinyl alcohol and having interior to surface porosity-gradient |
| US7449236B2 (en) | 2002-08-09 | 2008-11-11 | Boston Scientific Scimed, Inc. | Porous polymeric particle comprising polyvinyl alcohol and having interior to surface porosity-gradient |
| US8012454B2 (en) | 2002-08-30 | 2011-09-06 | Boston Scientific Scimed, Inc. | Embolization |
| US7588825B2 (en) | 2002-10-23 | 2009-09-15 | Boston Scientific Scimed, Inc. | Embolic compositions |
| US7883490B2 (en) | 2002-10-23 | 2011-02-08 | Boston Scientific Scimed, Inc. | Mixing and delivery of therapeutic compositions |
| DE10326666A1 (de) * | 2003-02-24 | 2004-09-02 | Bayer Ag | Stoffgemische |
| US7976823B2 (en) | 2003-08-29 | 2011-07-12 | Boston Scientific Scimed, Inc. | Ferromagnetic particles and methods |
| US7901770B2 (en) | 2003-11-04 | 2011-03-08 | Boston Scientific Scimed, Inc. | Embolic compositions |
| DE102004006116A1 (de) * | 2004-02-06 | 2005-08-25 | Bayer Chemicals Ag | Verfahren zur Herstellung von monodispersen porenhaltigen Ionenaustauschern |
| DE102004006115A1 (de) * | 2004-02-06 | 2005-08-25 | Bayer Chemicals Ag | Verfahren zur Herstellung von monodispersen acrylhaltigen Perlpolymerisaten |
| US7736671B2 (en) | 2004-03-02 | 2010-06-15 | Boston Scientific Scimed, Inc. | Embolization |
| NO20041205L (no) * | 2004-03-22 | 2005-09-23 | Polymers Holding As | Lagringsstabile polymer-oligomer partikler og anvendelse av disse i seed polymerisasjon |
| US8173176B2 (en) | 2004-03-30 | 2012-05-08 | Boston Scientific Scimed, Inc. | Embolization |
| US7311861B2 (en) | 2004-06-01 | 2007-12-25 | Boston Scientific Scimed, Inc. | Embolization |
| US8425550B2 (en) | 2004-12-01 | 2013-04-23 | Boston Scientific Scimed, Inc. | Embolic coils |
| US7858183B2 (en) | 2005-03-02 | 2010-12-28 | Boston Scientific Scimed, Inc. | Particles |
| US7727555B2 (en) | 2005-03-02 | 2010-06-01 | Boston Scientific Scimed, Inc. | Particles |
| EP1862478B1 (de) * | 2005-03-03 | 2012-01-25 | Mitsubishi Rayon Co., Ltd. | Polymerteilchen, dieses enthaltende harzzusammensetzung und formkörper |
| KR100751598B1 (ko) * | 2005-04-19 | 2007-08-22 | 최순자 | 무유화 유화중합으로 다양한 크기와 형태를 갖는 비닐계고분자 입자를 제조하는 방법 |
| US7963287B2 (en) | 2005-04-28 | 2011-06-21 | Boston Scientific Scimed, Inc. | Tissue-treatment methods |
| ES2568782T3 (es) | 2005-05-09 | 2016-05-04 | Biosphere Medical, S.A. | Composiciones y métodos de uso de microesferas y agentes de contraste no iónicos |
| US7449505B2 (en) * | 2005-05-20 | 2008-11-11 | Xerox Corporation | Method of making porous microspheres with geometric standard deviation of 1.25 or less |
| KR100673550B1 (ko) * | 2005-06-15 | 2007-01-24 | 주식회사 선진화학 | 폴리메틸메타아크릴레이트 비드의 제조방법 |
| US7638053B2 (en) * | 2005-06-22 | 2009-12-29 | General Electric Company | Poly(meth)acrylate membranes for separation of hydrocarbon mixtures |
| US9463426B2 (en) | 2005-06-24 | 2016-10-11 | Boston Scientific Scimed, Inc. | Methods and systems for coating particles |
| DE102005035616A1 (de) * | 2005-07-29 | 2007-02-08 | Lanxess Deutschland Gmbh | Monodisperse Kationenaustauscher |
| EP2295473B1 (de) * | 2005-09-16 | 2016-12-28 | Rohm and Haas Company | Quellfähige Teilchen |
| US8007509B2 (en) | 2005-10-12 | 2011-08-30 | Boston Scientific Scimed, Inc. | Coil assemblies, components and methods |
| US8101197B2 (en) | 2005-12-19 | 2012-01-24 | Stryker Corporation | Forming coils |
| US8152839B2 (en) | 2005-12-19 | 2012-04-10 | Boston Scientific Scimed, Inc. | Embolic coils |
| US7947368B2 (en) | 2005-12-21 | 2011-05-24 | Boston Scientific Scimed, Inc. | Block copolymer particles |
| EP1986707A2 (de) | 2006-01-30 | 2008-11-05 | Surgica Corporation | Komprimierbare intravaskuläre embolisationsteilchen und relevante verfahren und abgabesysteme |
| WO2007090130A2 (en) * | 2006-01-30 | 2007-08-09 | Surgica Corporation | Porous intravascular embolization particles and related methods |
| KR100752740B1 (ko) * | 2006-03-16 | 2007-08-30 | 한국화학연구원 | 균일한 형태와 크기를 갖는 가교된 고분자비드 |
| KR100789046B1 (ko) | 2006-04-03 | 2007-12-26 | 한화석유화학 주식회사 | 단분산 광확산제 제조방법 |
| US8414927B2 (en) | 2006-11-03 | 2013-04-09 | Boston Scientific Scimed, Inc. | Cross-linked polymer particles |
| EP2088160B1 (de) * | 2006-12-01 | 2012-10-31 | Institute of Process Engineering Chinese Academy of Sciences | Supermakroporöse polymermikrokugel und herstellungsverfahren dafür |
| WO2008118972A1 (en) * | 2007-03-26 | 2008-10-02 | The Purolite Company | Macroporous copolymers with large pores |
| CA2625522A1 (en) | 2007-04-20 | 2008-10-20 | Rohm And Haas Company | Method for removing phosphate from aqueous solutions |
| CN101186661B (zh) * | 2007-12-14 | 2012-09-19 | 深圳市纳微科技有限公司 | 一种聚合物颗粒的制备方法 |
| KR100960621B1 (ko) | 2007-12-21 | 2010-06-07 | 제일모직주식회사 | 단분산 고분자 입자의 제조방법 |
| WO2009142119A1 (ja) | 2008-05-21 | 2009-11-26 | 住友精化株式会社 | 表面に多数のくぼみを有する樹脂粒子 |
| US9240583B2 (en) * | 2008-11-26 | 2016-01-19 | Nippon Paper Industries Co., Ltd. | Carboxymethylcellulose or salt thereof for electrodes of nonaqueous electrolyte secondary battery and aqueous solution thereof |
| GB0907372D0 (en) * | 2009-04-29 | 2009-06-10 | Invitrogen Dynal As | Particles |
| JP5474745B2 (ja) * | 2009-12-30 | 2014-04-16 | ローム アンド ハース カンパニー | 均一なオリゴマー液滴を製造する方法 |
| JP5483451B2 (ja) | 2009-12-30 | 2014-05-07 | ローム アンド ハース カンパニー | 均一なポリマービーズを製造する方法 |
| KR101452207B1 (ko) * | 2010-09-28 | 2014-10-22 | 세키스이가세이힝코교가부시키가이샤 | 수지 입자 및 그 제조 방법, 및 방현 필름, 광확산성 수지 조성물, 및 외용제 |
| EP3016924A1 (de) | 2013-04-26 | 2016-05-11 | Silicon Fire AG | Verfahren und reaktoranlage zur synthese von methanol mit kreisgas- und purgegasrückführung |
| US9238294B2 (en) * | 2014-06-18 | 2016-01-19 | Nexplanar Corporation | Polishing pad having porogens with liquid filler |
| CN104788709A (zh) * | 2015-04-17 | 2015-07-22 | 张家港市山牧新材料技术开发有限公司 | 一种超大粒径复合橡胶改性聚苯乙烯树脂的制备方法 |
| WO2019094192A1 (en) * | 2017-11-10 | 2019-05-16 | Dow Global Technologies Llc | Component addition polymerization |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB801399A (en) * | 1954-11-12 | 1958-09-10 | Dow Chemical Co | Method of enlarging solid cross-linked polymer bodies |
| US4382124B1 (en) * | 1958-07-18 | 1994-10-04 | Rohm & Haas | Process for preparing macroreticular resins, copolymers and products of said process |
| GB1292226A (en) * | 1970-03-17 | 1972-10-11 | Permutit Co Ltd | Production of copolymers |
| US4091054A (en) * | 1973-07-23 | 1978-05-23 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Process of preparing styrenic polymer particles |
| US4085169A (en) * | 1973-07-23 | 1978-04-18 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Process for preparing styrenic polymer particles |
| FR2255314A1 (en) * | 1973-12-20 | 1975-07-18 | Sekisui Plastics | Expandable polyethylene particles prodn. - by polymn. of mixture contg. major proportion of styrene monomers |
| NO141367C (no) * | 1976-11-22 | 1980-02-27 | Sintef | Framgangsmaate for framstilling av findelte emulsjoner av et litt vannloeselig materiale |
| AU530410B2 (en) * | 1978-02-21 | 1983-07-14 | Sintef | Preparing aqueous emulsions |
| US4333969A (en) * | 1980-12-23 | 1982-06-08 | Atlantic Richfield Company | Process for producing styrenic polymer beads of preferred bead size |
| NO149108C (no) * | 1981-10-21 | 1984-02-15 | Sintef | Fremgangsmaate for fremstilling av vandige dispersjoner av organisk materiale og eventuelt videre omdannelse til en polymerdispersjon naar det organiske materiale er en polymeriserbar monomer |
| US4419245A (en) * | 1982-06-30 | 1983-12-06 | Rohm And Haas Company | Copolymer process and product therefrom consisting of crosslinked seed bead swollen by styrene monomer |
| US4518724A (en) * | 1982-10-04 | 1985-05-21 | Nippon Paint Co., Ltd. | Aqueous coating composition |
| DE3362712D1 (en) * | 1982-10-30 | 1986-04-30 | Kanegafuchi Chemical Ind | Process for preparing modified polyolefin particles and foamed article made from the particles |
| US4582859A (en) * | 1983-12-02 | 1986-04-15 | Rohm And Haas Company | Process for producing an expanded seed copolymer and product therefrom |
| JPS6195016A (ja) * | 1984-10-16 | 1986-05-13 | Japan Synthetic Rubber Co Ltd | スペ−サ |
| NO860171L (no) * | 1985-01-30 | 1986-07-31 | Japan Synthetic Rubber Co Ltd | Fremgangsmaate for fremstilling av store polymerpartikler. |
| US4935469A (en) * | 1987-02-04 | 1990-06-19 | Fuji Xerox Co., Ltd. | Process for producing monodispersed vinyl polymer fine particles |
-
1991
- 1991-03-01 US US07/662,872 patent/US5147937A/en not_active Expired - Lifetime
- 1991-03-18 CA CA002038502A patent/CA2038502C/en not_active Expired - Lifetime
- 1991-03-19 NZ NZ237483A patent/NZ237483A/en unknown
- 1991-03-19 NO NO91911076A patent/NO911076L/no unknown
- 1991-03-19 MX MX024976A patent/MX173510B/es unknown
- 1991-03-20 DE DE69119633T patent/DE69119633T2/de not_active Expired - Lifetime
- 1991-03-20 AT AT91302453T patent/ATE138400T1/de not_active IP Right Cessation
- 1991-03-20 IL IL9761091A patent/IL97610A/en not_active IP Right Cessation
- 1991-03-20 EP EP91302453A patent/EP0448391B1/de not_active Expired - Lifetime
- 1991-03-21 BR BR919101115A patent/BR9101115A/pt not_active IP Right Cessation
- 1991-03-21 PT PT97102A patent/PT97102A/pt not_active Application Discontinuation
- 1991-03-21 FI FI911386A patent/FI911386A/fi not_active Application Discontinuation
- 1991-03-21 CN CN91101758A patent/CN1038756C/zh not_active Expired - Lifetime
- 1991-03-21 IE IE094791A patent/IE910947A1/en unknown
- 1991-03-21 PL PL28952891A patent/PL289528A1/xx unknown
- 1991-03-21 AU AU73614/91A patent/AU648293B2/en not_active Expired
- 1991-03-22 KR KR1019910004516A patent/KR0171604B1/ko not_active IP Right Cessation
- 1991-03-22 HU HU91973A patent/HUT61781A/hu unknown
- 1991-03-22 CZ CS91778A patent/CZ280984B6/cs not_active IP Right Cessation
- 1991-03-22 JP JP3058840A patent/JP3055071B2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0448391B1 (de) | 1996-05-22 |
| PL289528A1 (en) | 1991-12-16 |
| JPH0593075A (ja) | 1993-04-16 |
| BR9101115A (pt) | 1991-11-05 |
| EP0448391A3 (en) | 1992-03-18 |
| CN1038756C (zh) | 1998-06-17 |
| NO911076L (no) | 1991-09-23 |
| CZ280984B6 (cs) | 1996-05-15 |
| CA2038502A1 (en) | 1991-09-23 |
| EP0448391A2 (de) | 1991-09-25 |
| NO911076D0 (no) | 1991-03-19 |
| AU648293B2 (en) | 1994-04-21 |
| JP3055071B2 (ja) | 2000-06-19 |
| CA2038502C (en) | 2003-05-20 |
| ATE138400T1 (de) | 1996-06-15 |
| KR0171604B1 (ko) | 1999-03-30 |
| KR910016823A (ko) | 1991-11-05 |
| AU7361491A (en) | 1991-10-03 |
| US5147937A (en) | 1992-09-15 |
| IL97610A (en) | 1995-05-26 |
| PT97102A (pt) | 1991-11-29 |
| NZ237483A (en) | 1993-07-27 |
| HUT61781A (en) | 1993-03-01 |
| IE910947A1 (en) | 1991-09-25 |
| DE69119633T2 (de) | 1997-01-23 |
| FI911386A0 (fi) | 1991-03-21 |
| HU910973D0 (en) | 1991-10-28 |
| IL97610A0 (en) | 1992-06-21 |
| MX173510B (es) | 1994-03-10 |
| CN1059913A (zh) | 1992-04-01 |
| FI911386A (fi) | 1991-09-23 |
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