WO2007145313A1 - シリコーンゴム組成物 - Google Patents
シリコーンゴム組成物 Download PDFInfo
- Publication number
- WO2007145313A1 WO2007145313A1 PCT/JP2007/062099 JP2007062099W WO2007145313A1 WO 2007145313 A1 WO2007145313 A1 WO 2007145313A1 JP 2007062099 W JP2007062099 W JP 2007062099W WO 2007145313 A1 WO2007145313 A1 WO 2007145313A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- silicone rubber
- weight
- rubber composition
- high pressure
- sealing material
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/102—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by material
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/80—Siloxanes having aromatic substituents, e.g. phenyl side groups
Definitions
- the present invention relates to a silicone rubber composition. More particularly, the present invention relates to a silicone rubber composition suitably used as a vulcanized molding material of a high pressure gas, particularly a high pressure hydrogen gas sealing material.
- Fuel cells have a problem in storage of hydrogen, which is a system that generates electricity by reacting hydrogen and oxygen.
- methods of storing hydrogen under high pressure methods of storing hydrogen adsorbed on metal, methods of reforming hydrocarbon to extract hydrogen, etc. are proposed.
- When storing hydrogen under high pressure Will be stored in a tank.
- a tank having a hydrogen gas storage pressure of about 35 MPa is generally used, but when a fuel cell is used in a car, a sufficient travel distance can not be obtained. Storage at high pressure is being considered.
- hydrogen gas is stored in the tank, a seal is required, and metal seals and rubber seals with EPDM are currently used! However, metal seals are less maintainable, and EPDM rubber seals are less reliable. It is in a state of ⁇ and U ⁇ .
- high pressure gas seals are required to have the function of not breaking by pressurization (pressure does not generate decompression) (does not generate a pristar), and rubber elasticity even if the temperature is extremely low due to adiabatic expansion by rapid pressure reduction. It is necessary to keep it.
- CNG compressed natural gas; about 20 MPa
- high-pressure fuel gas it is known that adiabatic expansion at the time of rapid pressure reduction reduces the temperature to about -60 ° C.
- hydrogen gas is stored at a pressure higher than CNG, so it seems to be required to maintain rubber elasticity even at -60 ° C or less.
- EPDM which is mainly used at present, has rubber elasticity only up to about -50.degree. C., so the low temperature characteristics are not sufficient.
- sealing material of a sealing structure that can withstand the sealing of high pressure gas such as high pressure hydrogen gas, butyl
- high pressure gas such as high pressure hydrogen gas
- butyl Although it is described in the following Patent Documents 1 and 2 that rubber, fluororubber, hydrogenated-tolyl rubber, tetrafluoroethylene-perfluoro (alkyl vinyl ether) copolymer and the like are used, these sealing materials are formed. Rubber materials are not preferable because the sealability at low temperatures is impaired. In addition, at least in the case of butyl rubber, fluoro rubber and hydrogenated-tolyl rubber, the occurrence of blistering at the time of rapid pressure reduction becomes a problem.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-28302
- Patent Document 2 Japanese Patent Application Laid-Open No. 2004-76870
- Silicone rubber is known as a rubber excellent in low temperature properties, but it is the most representative silicone rubber of which low temperature resistance of polydimethyl siloxane containing bule group as a small amount of crosslinkable group The properties are up to about -55 ° C and the low temperature properties are not sufficient, and the low temperature resistance of methyl fluoroalkyl silicone rubber is effective up to about -70 ° C. Sometimes there is a problem of blistering.
- the object of the present invention is to provide a rubber composition which is excellent in low temperature properties and blister resistance, and is therefore suitably used as a vulcanizing molding material such as a sealing material of a storage tank for storage high pressure hydrogen gas of 70 MPa, for example. It is to do.
- a compelling object of the present invention is a bule group-introduced methyl vinyl compound system having a dimethylsiloxane copolymerized unit as a main component and copolymerized 3 to 30 mol% of methyl phenyl siloxane copolymerized unit thereto.
- This is achieved by a silicone rubber composition containing 0.2 to 8 parts by weight of organic peroxide per 100 parts by weight of silicone rubber.
- Introduction of Bulle groups into the silicone rubber used herein is generally from 0.1 to 5 mole 0/0 Mechirubi - performed Koyori Rukoto ⁇ by copolymerizing Le siloxane.
- silica is used as the filler, it is preferable to use a surfactant for silica and water in combination.
- the copolymer weight is It is known that an increase in the content of phenyl groups up to a certain amount in relation to the content of phenyl groups and brittle temperature in coalescence improves the cold resistance.
- Silicone rubber composition of the present invention by specifying the copolymerization amount of methylphenylsiloxane copolymerization units in silicone rubber containing dimethylsiloxane copolymer units as the main component, resistance to the low temperature environment which occurs during rapid pressure reduction of high pressure gas is imparted. In this case, blisters generated by gas remaining in the seal member can be reduced, and in particular, the generation reduction effect of Plister is remarkably exhibited.
- V the one that is easy to generate Plister at the time of rapid decompression, can not avoid the phenomenon.
- materials with high gas diffusibility such as silicone rubber are used in the present invention, and the tightness of the gas seal under static pressure is strictly higher than that of other rubber materials as described above.
- inferior surfaces are observed, the sealing performance can be maintained as a result, as compared with the case where the seal member is damaged by the blister found in other rubber materials.
- silica is used in combination as a filler
- simultaneous use of a surfactant for silica and water, which is preferable to be used simultaneously has the effect of further reducing the occurrence of blisters.
- the silicone rubber composition according to the present invention is excellent in low temperature properties and blister resistance, and for example, a sealing material of a storage tank for high pressure hydrogen gas with a storage pressure of 70 MPa, specifically 0 ring, packing. It can also be suitably used as a vulcanized molding material such as gaskets, oil seals and valves.
- a storage high pressure gas not only hydrogen gas but also oxygen gas, nitrogen gas, helium gas and the like can be suitably used in the same manner.
- the pressure resistance is intended for use with a high pressure gas of I MPa or more, and in particular, excellent pressure resistance sealability even under use conditions of 35 MPa or more according to the description of storage tank specifications, for example 70 MPa as described above. Is demonstrated.
- the methylphenyl-based silicone rubber is mainly composed of dimethylsiloxane copolymerized units. And copolymerized with methyl phenyl siloxane copolymer units (3 to 30 mols / 0 , preferably 10 to 25 mol% in 100 mol% of the total copolymerized units), and further to this methyl belsiloxioxane (CH ⁇ CH) (CH 2) SiO ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ (100% by mole of all copolymerization units
- crosslinkable group of about 0.1 to 5 mole%, preferably about 0.5 to 3 mole%, and in each of the following Examples and Comparative Examples, the difference of about 1 mole% was used.
- a silicone rubber containing a vinyl group of When the copolymerization amount of the methyl phenyl siloxane copolymer unit is within this range, the glass transition temperature of the methyl phenyl silicone rubber is ⁇ 80 to ⁇ 90 ° C., and the use at a very low temperature is Possible and no blistering occurred even under sudden pressure reduction. On the other hand, if the copolymerization amount of the methylphenylsiloxane copolymerized unit is out of this range, sufficient low temperature characteristics can not be obtained.
- Shin-Etsu Silicone product KE138Y-U, Dow coating product DY32-379U, etc. which are commercially available products, can be used as they are.
- a powerful methylphenyl-based silicone rubber is vulcanized (crosslinked) by an organic peroxide.
- Any organic peroxide can be used without particular limitation as long as it is generally usable for rubber, and examples thereof include benzoyl peroxide, P-chlorobenzyl peroxide, and 2,4-dichloromethane.
- Benzyl peroxide di-tert-butyl peroxide, tert-butylcumyl peroxide, di-cumyl peroxide, 1,1-di (tert-butylperoxy) -3,3,5-trimethylcyclohexane, 2,5 -Dimethyl-2,5-di (tert-butylperoxy) hexane, 2,5-dimethyl-2,5-di (tert-butylperoxy) hexyne-3,1,3-di (tert-butylperoxyisopropyl) benzene , 2,5-Dimethyl-2,5-di (benzoxyl) hexane, tert-butyl peroxybenzoate, tert-butyl peroxyisopropyl carbonate, n-butyl-4,4-di 3 butyl peroxide) valerate etc. It is needed.
- organic peroxides are used in a proportion of 0.2 to 8 parts by weight, preferably 1 to 5 parts by weight, per 100 parts by weight of silicone rubber. If it is used below this ratio, a sufficient crosslinking density can not be obtained, while if it is used at a ratio higher than this, it will not foam to form a vulcanized molded product, or if it is obtained, its rubber elasticity and elongation will decrease. You will come to
- silicone rubber composition in addition to the above essential components, carbon black generally used as a compounding agent for rubber, a reinforcing agent such as silica, talc, clay, graphite, Fillers such as calcium silicate, processing aids such as stearic acid, palmitic acid and paraffin wax, acid acceptors such as zinc oxide and magnesium oxide, antioxidants, plasticizers, etc. are added as needed. Used.
- silica as a reinforcing agent is compounded
- the silica is used in a proportion of not more than 120 parts by weight, preferably about 50 to 120 parts by weight, per 100 parts by weight of methyl fluoride silicone rubber.
- silica is blended, it is desirable to use a surfactant such as hexamethyldisilazane in an amount of about 12 parts by weight or less, preferably about 2 to 8 parts by weight, per 100 parts by weight of silica.
- simultaneous use of water at a ratio of about 50% by weight or less, preferably about 10 to 30% by weight, based on the weight of the surfactant further reduces blistering.
- Preparation of the composition is carried out by kneading using an intermixer, kneader such as kneader or Banbury mixer, or open roll, and vulcanization molding thereof is carried out using an injection molding machine, a compression molding machine, an addition molding machine, etc.
- Oven heating is generally carried out by heating at about 150 to 200 ° C. for about 3 to 60 minutes using a vulcanizing press etc., and if necessary, heating at about 150 to 250 ° C. for about 1 to 24 hours. Next vulcanization) is performed.
- Blister test Immersed in hydrogen gas or helium gas at 70MPa for 5 hours at 25 ° C, decompressed to normal pressure within 5 seconds and visually check whether blistering occurred or not
- Example 1 Te Contact, Mechirufue as silicone rubber - le siloxane copolymer copolymerization amount of polymerized units of 19 mol 0/0 Mechirufue - Rubi - Le-based silicone rubber was used the same amount.
- Te Mechirufue as silicone rubber - copolymerization amount of Le siloxane copolymer units of 1.5 mole 0/0 Mechirufue - ruby - Le-based silicone rubber has been ⁇ for the same amount.
- Example 1 Te Contact, Mechirufue as silicone rubber - Mechirufue the copolymerization amount of Le siloxane copolymer units 35 mole 0/0 - Rubi - Le-based silicone rubber was used the same amount.
- Example 1 the amount of organic peroxide was changed to 0.1 parts by weight, but it was foamed at the stage of the prepared composition (unvulcanized state) and could not be molded.
- Example 1 Although the amount of organic peroxide was changed to 10 parts by weight and used, the vulcanized sheet was foamed and could not be molded.
- Example 1 as the silicone rubber, the same amount of methyl vinyl-based silicone rubber (Shin-Etsu Silicone product KE971-U) was used, and the amount of silica was changed to 95 parts by weight.
- Example 1 the same amount of methyl fluoroalkyl rubber (Shin-Etsu silicone product FE 271-U) was used as the silicone rubber, and the amount of silica was changed to 40 parts by weight.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Macromonomer-Based Addition Polymer (AREA)
- Gasket Seals (AREA)
- Sealing Material Composition (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP07745354.6A EP2031022B1 (en) | 2006-06-16 | 2007-06-15 | Silicone rubber composition |
US12/308,424 US8404791B2 (en) | 2006-06-16 | 2007-06-15 | Silicone rubber composition |
JP2008521266A JP5223672B2 (ja) | 2006-06-16 | 2007-06-15 | シリコーンゴム組成物 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2006-167223 | 2006-06-16 | ||
JP2006167223 | 2006-06-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007145313A1 true WO2007145313A1 (ja) | 2007-12-21 |
Family
ID=38831826
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2007/062099 WO2007145313A1 (ja) | 2006-06-16 | 2007-06-15 | シリコーンゴム組成物 |
Country Status (5)
Country | Link |
---|---|
US (1) | US8404791B2 (ja) |
EP (2) | EP2031022B1 (ja) |
JP (1) | JP5223672B2 (ja) |
CN (1) | CN101472997A (ja) |
WO (1) | WO2007145313A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019181722A1 (ja) * | 2018-03-20 | 2019-09-26 | Nok株式会社 | ガスシール用シリコーンゴム組成物 |
WO2020195696A1 (ja) | 2019-03-26 | 2020-10-01 | 株式会社バルカー | シール材用ゴム組成物およびこれを用いたシール材 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103421327B (zh) * | 2013-08-16 | 2015-12-02 | 卢儒 | 一种用于有机硅玻纤套管的混炼胶组合物及其合成工艺 |
US10717850B2 (en) * | 2015-06-26 | 2020-07-21 | Zeon Corporation | Composition for gas seal member and gas seal member |
TWI626267B (zh) * | 2016-06-13 | 2018-06-11 | 矽橡膠黏土及其製作方法 | |
CN110951264A (zh) * | 2019-12-12 | 2020-04-03 | 西安中科贝昂环保科技有限公司 | 冰箱用环保橡胶材料及其制备方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0517688A (ja) * | 1991-07-15 | 1993-01-26 | Toshiba Silicone Co Ltd | 低温パツキング用シリコーンゴム組成物 |
JPH06287304A (ja) * | 1993-03-31 | 1994-10-11 | Agency Of Ind Science & Technol | 低温安定性エラストマー及びその製造方法 |
JP2003028302A (ja) | 2001-07-16 | 2003-01-29 | Nok Corp | 密封装置 |
JP2004076870A (ja) | 2002-08-20 | 2004-03-11 | Mitsubishi Cable Ind Ltd | 高圧水素ガス密封構造及びシール |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
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GB821395A (en) * | 1956-11-01 | 1959-10-07 | Gen Electric | Improvements in alkyl aryl vinyl silicone elastomers |
DE1113568B (de) * | 1960-02-25 | 1961-09-07 | Wacker Chemie Gmbh | Zu Elastomeren haertbare Massen auf Organopolysiloxan-Grundlage |
US3341490A (en) * | 1964-08-13 | 1967-09-12 | Dow Corning | Blends of two polysiloxane copolymers with silica |
US4158617A (en) * | 1976-03-08 | 1979-06-19 | General Motors Corporation | Radiation cured and monomer modified silicon elastomers |
US4418165A (en) * | 1980-06-03 | 1983-11-29 | Dow Corning Corporation | Optically clear silicone compositions curable to elastomers |
JP2635064B2 (ja) * | 1987-12-14 | 1997-07-30 | 株式会社金陽社 | 定着器用ロール |
JPH07258548A (ja) * | 1994-03-22 | 1995-10-09 | Toshiba Silicone Co Ltd | 導電性シリコーンゴム組成物 |
JP3378125B2 (ja) * | 1995-08-28 | 2003-02-17 | ジーイー東芝シリコーン株式会社 | 導電性シリコーンゴム組成物 |
JP3694080B2 (ja) * | 1995-11-30 | 2005-09-14 | 東レ・ダウコーニング株式会社 | ジオルガノポリシロキサン・微粉状シリカ混合物の製造方法 |
US5861448A (en) * | 1997-01-31 | 1999-01-19 | Dow Corning Corporation | Organohydrogensiloxane resin crosslinker curable organosiloxane composition with improved hysteresis characteristics |
JP2001056017A (ja) * | 1999-08-12 | 2001-02-27 | Shin Etsu Polymer Co Ltd | 半導電性ロールとこれを備えた現像装置 |
-
2007
- 2007-06-15 CN CNA2007800225681A patent/CN101472997A/zh active Pending
- 2007-06-15 JP JP2008521266A patent/JP5223672B2/ja active Active
- 2007-06-15 WO PCT/JP2007/062099 patent/WO2007145313A1/ja active Application Filing
- 2007-06-15 US US12/308,424 patent/US8404791B2/en not_active Expired - Fee Related
- 2007-06-15 EP EP07745354.6A patent/EP2031022B1/en not_active Expired - Fee Related
- 2007-06-15 EP EP10193965A patent/EP2319889B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0517688A (ja) * | 1991-07-15 | 1993-01-26 | Toshiba Silicone Co Ltd | 低温パツキング用シリコーンゴム組成物 |
JPH06287304A (ja) * | 1993-03-31 | 1994-10-11 | Agency Of Ind Science & Technol | 低温安定性エラストマー及びその製造方法 |
JP2003028302A (ja) | 2001-07-16 | 2003-01-29 | Nok Corp | 密封装置 |
JP2004076870A (ja) | 2002-08-20 | 2004-03-11 | Mitsubishi Cable Ind Ltd | 高圧水素ガス密封構造及びシール |
Non-Patent Citations (4)
Title |
---|
"DY32-379U", DOW CORNING CO., LTD. |
"FE271-U", SHIN-ETSU SILICONE CO., LTD. |
"KE138 Y-U", SHIN-ETSU SILICONE CO., LTD. |
See also references of EP2031022A4 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019181722A1 (ja) * | 2018-03-20 | 2019-09-26 | Nok株式会社 | ガスシール用シリコーンゴム組成物 |
JPWO2019181722A1 (ja) * | 2018-03-20 | 2020-04-30 | Nok株式会社 | ガスシール用シリコーンゴム組成物 |
WO2020195696A1 (ja) | 2019-03-26 | 2020-10-01 | 株式会社バルカー | シール材用ゴム組成物およびこれを用いたシール材 |
KR20210140748A (ko) | 2019-03-26 | 2021-11-23 | 주식회사 발카 | 시일재용 고무 조성물 및 이것을 사용한 시일재 |
Also Published As
Publication number | Publication date |
---|---|
EP2319889B1 (en) | 2012-09-19 |
CN101472997A (zh) | 2009-07-01 |
JP5223672B2 (ja) | 2013-06-26 |
EP2031022A4 (en) | 2010-04-28 |
EP2319889A1 (en) | 2011-05-11 |
EP2031022A1 (en) | 2009-03-04 |
EP2031022B1 (en) | 2013-09-04 |
US20100240828A1 (en) | 2010-09-23 |
JPWO2007145313A1 (ja) | 2009-11-12 |
US8404791B2 (en) | 2013-03-26 |
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