FR1600355A - - Google Patents
Info
- Publication number
- FR1600355A FR1600355A FR1600355DA FR1600355A FR 1600355 A FR1600355 A FR 1600355A FR 1600355D A FR1600355D A FR 1600355DA FR 1600355 A FR1600355 A FR 1600355A
- Authority
- FR
- France
- Prior art keywords
- polymer
- polymers
- groups
- fluorine
- end groups
- 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
Links
- 229920000642 polymer Polymers 0.000 abstract 5
- 229910052731 fluorine Inorganic materials 0.000 abstract 4
- 239000011737 fluorine Substances 0.000 abstract 4
- 229920002313 fluoropolymer Polymers 0.000 abstract 3
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 abstract 2
- 239000007787 solid Substances 0.000 abstract 2
- 239000002904 solvent Substances 0.000 abstract 2
- KHXKESCWFMPTFT-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptafluoro-3-(1,2,2-trifluoroethenoxy)propane Chemical compound FC(F)=C(F)OC(F)(F)C(F)(F)C(F)(F)F KHXKESCWFMPTFT-UHFFFAOYSA-N 0.000 abstract 1
- QARLOMBMXGVKNV-UHFFFAOYSA-N 1,2,2-trifluoroethenesulfonyl fluoride Chemical compound FC(F)=C(F)S(F)(=O)=O QARLOMBMXGVKNV-UHFFFAOYSA-N 0.000 abstract 1
- NHJFHUKLZMQIHN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanoyl 2,2,3,3,3-pentafluoropropaneperoxoate Chemical compound FC(F)(F)C(F)(F)C(=O)OOC(=O)C(F)(F)C(F)(F)F NHJFHUKLZMQIHN-UHFFFAOYSA-N 0.000 abstract 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 abstract 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 abstract 1
- 239000004160 Ammonium persulphate Substances 0.000 abstract 1
- 239000004215 Carbon black (E152) Substances 0.000 abstract 1
- -1 NgO Substances 0.000 abstract 1
- 235000012501 ammonium carbonate Nutrition 0.000 abstract 1
- 239000001099 ammonium carbonate Substances 0.000 abstract 1
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 abstract 1
- 235000019395 ammonium persulphate Nutrition 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 229910052799 carbon Inorganic materials 0.000 abstract 1
- 125000004432 carbon atom Chemical group C* 0.000 abstract 1
- 150000004292 cyclic ethers Chemical class 0.000 abstract 1
- 239000007789 gas Substances 0.000 abstract 1
- HCDGVLDPFQMKDK-UHFFFAOYSA-N hexafluoropropylene Chemical group FC(F)=C(F)C(F)(F)F HCDGVLDPFQMKDK-UHFFFAOYSA-N 0.000 abstract 1
- 229930195733 hydrocarbon Natural products 0.000 abstract 1
- 150000002430 hydrocarbons Chemical class 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000012188 paraffin wax Substances 0.000 abstract 1
- SNGREZUHAYWORS-UHFFFAOYSA-N perfluorooctanoic acid Chemical compound OC(=O)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)C(F)(F)F SNGREZUHAYWORS-UHFFFAOYSA-N 0.000 abstract 1
- 238000006116 polymerization reaction Methods 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 125000001424 substituent group Chemical group 0.000 abstract 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
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
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/20—Manufacture of shaped structures of ion-exchange resins
- C08J5/22—Films, membranes or diaphragms
- C08J5/2287—After-treatment
- C08J5/2293—After-treatment of fluorine-containing membranes
-
- 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
- C08F8/00—Chemical modification by after-treatment
- C08F8/18—Introducing halogen atoms or halogen-containing groups
- C08F8/20—Halogenation
- C08F8/22—Halogenation by reaction with free halogens
-
- 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
- C08J2327/00—Characterised by the use 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; Derivatives of such polymers
- C08J2327/02—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment
- C08J2327/12—Characterised by the use 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; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
- C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US69873168A | 1968-01-18 | 1968-01-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR1600355A true FR1600355A (OSRAM) | 1970-07-20 |
Family
ID=24806441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR1600355D Expired FR1600355A (OSRAM) | 1968-01-18 | 1968-12-31 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPS4623245B1 (OSRAM) |
| DE (1) | DE1901872B2 (OSRAM) |
| FR (1) | FR1600355A (OSRAM) |
| GB (1) | GB1210794A (OSRAM) |
| NL (1) | NL6900832A (OSRAM) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0037745A1 (en) * | 1980-04-09 | 1981-10-14 | E.I. Du Pont De Nemours And Company | Waterproof protective covers comprising a film of highly fluorinated ion exchange polymer |
| EP0037744A1 (en) * | 1980-04-09 | 1981-10-14 | E.I. Du Pont De Nemours And Company | Protective clothing for confining toxic compounds using film of highly fluorinated ion exchange polymer |
Families Citing this family (73)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4599386A (en) * | 1984-10-18 | 1986-07-08 | E. I. Du Pont De Nemours And Company | Heat stable tetrafluoroethylene-perfluoro(alkyl vinyl ether) copolymers |
| US4743658A (en) * | 1985-10-21 | 1988-05-10 | E. I. Du Pont De Nemours And Company | Stable tetrafluoroethylene copolymers |
| US4675380A (en) * | 1985-10-25 | 1987-06-23 | E. I. Du Pont De Nemours And Company | Melt-processible tetrafluoroethylene/perfluoroolefin copolymer granules and processes for preparing them |
| US4742122A (en) * | 1985-10-25 | 1988-05-03 | E. I. Du Pont De Nemours And Company | Melt-processible tetrafluoroethylene/perfluoroolefin copolymers and processes for preparing them |
| DE3585092D1 (de) * | 1985-11-08 | 1992-02-13 | Du Pont | Schmelzverarbeitbare copolymere von tetrafluoraethylen und perfluorolefinen und verfahren zu ihrer herstellung. |
| DE3585160D1 (de) * | 1985-11-08 | 1992-02-20 | Du Pont | Verfahren zur behandlung von schmelzverarbeitbaren copolymeren von tetrafluoraethylen und perfluoralkylvinylaether. |
| DE3887435T2 (de) * | 1987-10-16 | 1994-06-30 | Du Pont | Leitfähige Fluorpolymere. |
| US5045605A (en) * | 1988-05-27 | 1991-09-03 | E. I. Du Pont De Nemours And Company | Process for the stabilization of fluoropolymers |
| US4946902A (en) * | 1988-05-27 | 1990-08-07 | E. I. Du Pont De Nemours And Company | Process for the setabilization of fluoropolymers |
| US5281680A (en) * | 1993-01-14 | 1994-01-25 | E. I. Du Pont De Nemours And Company | Polymerization of fluorinated copolymers |
| US5726214A (en) * | 1996-12-26 | 1998-03-10 | E. I. Du Pont De Nemours And Company | Self-foaming fluoropolymer composition |
| DE19805832A1 (de) * | 1998-02-13 | 1999-08-19 | Dyneon Gmbh | Mischungen aus thermoplastischen Fluorpolymeren |
| US6541588B1 (en) * | 1999-01-29 | 2003-04-01 | 3M Innovative Properties Company | Tetrafluoroethylene/hexafluoropropylene copolymers with higher drawability |
| DE19964006A1 (de) * | 1999-12-30 | 2001-07-12 | Dyneon Gmbh | Tetrafluorethylen-Copolymere |
| EP1244713B1 (en) | 2000-06-01 | 2006-05-03 | 3M Innovative Properties Company | Methods for the production of high purity fluoropolymers |
| DE10033514A1 (de) | 2000-07-11 | 2002-02-07 | Dyneon Gmbh | FEP mit erhöhter Wechselbiegefestigkeit und geringen Düsenablagerungen |
| US6583226B1 (en) | 2001-06-28 | 2003-06-24 | 3M Innovative Properties Company | FEP with increased flexural fatigue strength and a low level of die deposits |
| US7060772B2 (en) | 2001-09-20 | 2006-06-13 | 3M Innovative Properties Company | Fluoropolymers from tetrafluoroethylene and perfluoro(alkoxyalkyl vinyl) ether |
| US6703464B2 (en) | 2002-01-17 | 2004-03-09 | Daikin America, Inc. | Flourine-containing copolymer |
| US6743508B2 (en) | 2002-01-17 | 2004-06-01 | Daikin America, Inc. | Fep pellet |
| US6838545B2 (en) | 2002-11-08 | 2005-01-04 | E. I. Du Pont De Nemours And Company | Reaction of fluoropolymer melts |
| EP1596453B1 (en) | 2003-01-20 | 2010-09-08 | Asahi Glass Company Ltd. | Process for production of electrolyte material for solid polymer fuel cells and membrane electrode assembly for solid polymer fuel cells |
| JP4871591B2 (ja) * | 2003-05-13 | 2012-02-08 | 旭硝子株式会社 | 固体高分子型燃料電池用電解質ポリマー、その製造方法及び膜・電極接合体 |
| US7122609B2 (en) | 2003-05-14 | 2006-10-17 | E. I. Du Pont De Nemours And Company | High melt flow fluoropolymer |
| WO2005028522A1 (ja) | 2003-09-10 | 2005-03-31 | Asahi Kasei Chemicals Corporation | 安定化フルオロポリマー及びその製造方法 |
| WO2005049661A1 (ja) | 2003-11-20 | 2005-06-02 | Daikin Industries, Ltd. | 含フッ素重合体製造方法及び含フッ素重合体物 |
| CA2549676C (en) * | 2003-12-17 | 2010-03-30 | Daikin Industries, Ltd. | Fluoropolymer, process for producing fluoropolymer, electrolyte film, object having immobilized active substance, and solid polymer electrolyte type fuel cell |
| JP5168903B2 (ja) | 2004-08-18 | 2013-03-27 | 旭硝子株式会社 | 燃料電池用電解質ポリマー、その製造方法、電解質膜、及び膜・電極接合体 |
| US7342081B2 (en) | 2004-12-28 | 2008-03-11 | 3M Innovative Properties Company | Fluoropolymer compositions, coated articles, and method of making the same |
| JP4916668B2 (ja) * | 2005-03-01 | 2012-04-18 | 旭化成イーマテリアルズ株式会社 | 高安定性フッ素化スルホン酸ポリマー |
| US7214740B2 (en) * | 2005-05-03 | 2007-05-08 | 3M Innovative Properties Company | Fluorinated ionomers with reduced amounts of carbonyl end groups |
| US20080292935A1 (en) * | 2005-12-22 | 2008-11-27 | Mark Gerrit Roelofs | Methods to Prepare Chemically Stabilized Ionomers Containing Inorganic Fillers |
| EP1972024B1 (en) | 2005-12-22 | 2012-12-19 | E.I. Du Pont De Nemours And Company | Chemically stabilized ionomers containing inorganic fillers |
| WO2007089017A1 (ja) | 2006-02-03 | 2007-08-09 | Daikin Industries, Ltd. | －ｓｏ３ｈ基含有フルオロポリマー製造方法及び－ｓｏ３ｈ基含有フルオロポリマー |
| ATE451432T1 (de) | 2006-10-03 | 2009-12-15 | 3M Innovative Properties Co | Mehrschichtige artikel und verfahren zur erhöhung ihrer ablöselebensdauer |
| EP1914251A1 (en) | 2006-10-17 | 2008-04-23 | Solvay Solexis S.p.A. | Process for stabilizing fluoropolymer having ion exchange groups |
| WO2008047906A1 (en) * | 2006-10-20 | 2008-04-24 | Daikin Industries, Ltd. | Fluorinated copolymer, electric wire, and method for production of the electric wire |
| US7989513B2 (en) | 2006-12-20 | 2011-08-02 | E.I. Du Pont De Nemours And Company | Process for producing dispersions of highly fluorinated polymers |
| US7973091B2 (en) | 2006-12-20 | 2011-07-05 | E. I. Du Pont De Nemours And Company | Process for producing re-dispersable particles of highly fluorinated polymer |
| US20110217621A1 (en) | 2008-12-23 | 2011-09-08 | E. I. Du Pont De Nemours And Company | Process to produce catalyst coated membranes for fuel cell applications |
| US9133316B2 (en) | 2009-09-18 | 2015-09-15 | Asahi Kasei E-Materials Corporation | Electrolyte emulsion and process for producing same |
| EP2656425B1 (en) | 2010-12-20 | 2014-12-10 | E.I. Du Pont De Nemours And Company | Ionomers and ionically conductive compositions for use as one or more electrode of a fuel cell |
| JP2014502776A (ja) | 2010-12-20 | 2014-02-03 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 燃料電池の１種以上の電極として使用するための高分子量アイオノマーおよびイオン伝導性組成物 |
| WO2012088166A1 (en) | 2010-12-20 | 2012-06-28 | E. I. Du Pont De Nemours And Company | Ionomers and ionically conductive compositions |
| JP2014525115A (ja) | 2011-06-17 | 2014-09-25 | イー・アイ・デュポン・ドウ・ヌムール・アンド・カンパニー | 改善された複合ポリマー電解質膜 |
| US9228031B2 (en) | 2011-11-30 | 2016-01-05 | Solvay Specialty Polymers Italy S.P.A. | Process for reducing unstable end-groups in fluorinated polymers |
| US9175110B2 (en) | 2012-05-09 | 2015-11-03 | The Chemours Company Fc, Llc | Fluoropolymer resin treatment employing melt extrusion and exposure to oxygen source to reduce discoloration |
| US8785560B2 (en) | 2012-05-09 | 2014-07-22 | E I Du Pont De Nemours And Company | Employing pretreatment and fluorination of fluoropolymer resin to reduce discoloration |
| US9175115B2 (en) | 2012-05-09 | 2015-11-03 | The Chemours Company Fc, Llc | Fluoropolymer resin treatment employing heating and oxygen source to reduce discoloration |
| US20130303708A1 (en) * | 2012-05-09 | 2013-11-14 | E I Du Pont De Nemours And Company | Fluoropolymer Dispersion Treatment Employing Hypochlorite Salts or Nitrite Salts to Reduce Fluoropolymer Resin Discoloration |
| US8785516B2 (en) | 2012-05-09 | 2014-07-22 | E I Du Pont De Nemours And Company | Fluoropolymer dispersion treatment employing ultraviolet light and oxygen source to reduce fluoropolymer resin discoloration |
| US9175112B2 (en) | 2012-05-09 | 2015-11-03 | The Chemours Company Fc, Llc | Drying wet fluoropolymer resin and exposing to oxygen source to reduce discoloration |
| US20130303710A1 (en) * | 2012-05-09 | 2013-11-14 | E I Du Pont De Nemours And Company | Fluoropolymer Dispersion Treatment Employing Hydrogen Peroxide to Reduce Fluoropolymer Resin Discoloration |
| US20130303717A1 (en) * | 2012-05-09 | 2013-11-14 | E I Du Pont De Nemours And Company | Fluoropolymer Dispersion Treatment Employing Oxidizing Agent to Reduce Fluoropolymer Resin Discoloration |
| US9574027B2 (en) | 2013-03-11 | 2017-02-21 | The Chemours Company Fc, Llc | Fluoropolymer resin treatment employing sorbent to reduce fluoropolymer resin discoloration |
| US10730980B2 (en) | 2015-02-12 | 2020-08-04 | 3M Innovative Properties Company | Tetrafluoroethylene/hexafluoropropylene copolymers including perfluoroalkoxyalkyl pendant groups |
| EP3256502B1 (en) | 2015-02-12 | 2019-08-14 | 3M Innovative Properties Company | Tetrafluoroethylene/hexafluoropropylene copolymers having pendant sulfonyl groups |
| CN107223139B (zh) | 2015-02-12 | 2020-06-30 | 3M创新有限公司 | 包含全氟烷氧基烷基侧基的四氟乙烯/六氟丙烯共聚物及其制备和使用方法 |
| CN109563206A (zh) | 2016-08-17 | 2019-04-02 | 3M创新有限公司 | 四氟乙烯和全氟化烯丙基醚共聚物 |
| US11014999B2 (en) * | 2018-04-24 | 2021-05-25 | Inhance Technologies, LLC | Systems and methods for processing fluoropolymer materials and related workpieces |
| JP6614385B2 (ja) | 2018-04-26 | 2019-12-04 | ダイキン工業株式会社 | 精製フルオロポリマーの製造方法 |
| KR20220035938A (ko) | 2019-08-26 | 2022-03-22 | 다이킨 고교 가부시키가이샤 | 비수 전해액 전지용 부재 |
| EP4023409A4 (en) | 2019-08-26 | 2023-08-30 | Daikin Industries, Ltd. | INJECTION MOLDING |
| WO2021214664A1 (en) | 2020-04-21 | 2021-10-28 | 3M Innovative Properties Company | Particles including polytetrafluoroethylene and process for making a three-dimensional article |
| KR20230129191A (ko) | 2021-02-26 | 2023-09-06 | 다이킨 고교 가부시키가이샤 | 사출 성형체 및 그 제조 방법 |
| CN116981874A (zh) | 2021-02-26 | 2023-10-31 | 大金工业株式会社 | 管接头和管接头的制造方法 |
| JP7137111B2 (ja) | 2021-02-26 | 2022-09-14 | ダイキン工業株式会社 | 射出成形体およびその製造方法 |
| KR20230131268A (ko) | 2021-02-26 | 2023-09-12 | 다이킨 고교 가부시키가이샤 | 사출 성형체 및 그 제조 방법 |
| EP4299608A4 (en) * | 2021-02-26 | 2025-02-19 | Daikin Industries, Ltd. | INJECTION-MOLDED BODY AND MANUFACTURING METHOD THEREFOR |
| EP4365211A4 (en) * | 2021-06-30 | 2025-07-16 | Daikin Ind Ltd | METHOD FOR PRODUCING A COMPOSITION CONTAINING A HIGH-PURITY FLUOROPOLYMER, AND COMPOSITION CONTAINING A HIGH-PURITY FLUOROPOLYMER |
| WO2023282188A1 (ja) * | 2021-07-07 | 2023-01-12 | Ａｇｃ株式会社 | ペルフルオロ化合物の製造方法および含フッ素ポリマーの製造方法 |
| CN116640254B (zh) * | 2023-07-04 | 2024-09-13 | 四川红华实业有限公司 | 含氟热塑性聚合物不稳定端基的氟化处理方法及氟化系统 |
| CN116731226B (zh) * | 2023-07-04 | 2024-02-23 | 四川红华实业有限公司 | 一种含氟热塑性聚合物不稳定端基的氟化处理方法及应用 |
-
1968
- 1968-12-31 FR FR1600355D patent/FR1600355A/fr not_active Expired
-
1969
- 1969-01-15 DE DE19691901872 patent/DE1901872B2/de active Pending
- 1969-01-16 JP JP268569A patent/JPS4623245B1/ja active Pending
- 1969-01-16 GB GB272269A patent/GB1210794A/en not_active Expired
- 1969-01-17 NL NL6900832A patent/NL6900832A/xx unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0037745A1 (en) * | 1980-04-09 | 1981-10-14 | E.I. Du Pont De Nemours And Company | Waterproof protective covers comprising a film of highly fluorinated ion exchange polymer |
| EP0037744A1 (en) * | 1980-04-09 | 1981-10-14 | E.I. Du Pont De Nemours And Company | Protective clothing for confining toxic compounds using film of highly fluorinated ion exchange polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| NL6900832A (OSRAM) | 1969-07-22 |
| GB1210794A (en) | 1970-10-28 |
| DE1901872B2 (de) | 1971-04-08 |
| DE1901872A1 (de) | 1970-02-19 |
| JPS4623245B1 (OSRAM) | 1971-07-02 |
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