WO1994024175A1 - Fluorocopolymer, process for producing the same, and fluoroelastomer - Google Patents
Fluorocopolymer, process for producing the same, and fluoroelastomer Download PDFInfo
- Publication number
- WO1994024175A1 WO1994024175A1 PCT/JP1994/000634 JP9400634W WO9424175A1 WO 1994024175 A1 WO1994024175 A1 WO 1994024175A1 JP 9400634 W JP9400634 W JP 9400634W WO 9424175 A1 WO9424175 A1 WO 9424175A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- polymerization
- mol
- fluorine
- hexafluoropropylene
- ethylene
- Prior art date
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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
- C08F210/02—Ethene
Definitions
- Fluorinated copolymer method for producing the same, and fluorinated elastomer
- the present invention relates to a fluorine-based copolymer, a method for producing the same, and a fluorine-containing elastomer, and more particularly, to a fluorine-based copolymer obtained by copolymerizing ethylene with hexafluoropropylene and tetrafluoroethylene, a method for producing the same, And a fluorine-based elastomer obtained by vulcanizing the fluorine-based copolymer.
- Ethylene and hexafluoropropylene copolymers are elastic, exhibit the same general mechanical properties as fluorine elastomers, and have similar heat resistance, oil resistance, and chemical resistance. Is shown. In particular, it has excellent properties such as excellent methanol resistance and alkali resistance, high insulation properties, low dielectric loss tangent, and low frequency dependence.
- Binary copolymerization of ethylene and hexafluoropropylene has very low polymerizability, making it difficult to carry out copolymerization under mild conditions. Therefore, polymerization is carried out under high pressure of several hundreds to tens of thousands of kgf / cm 2 and high temperature of 100 ° C or more, or under severe conditions such as irradiation.
- Tatsukami et al. Have a pressure of 650 to: L 3 85 kgf / cm 2 when the copolymerization is a batch type and a temperature of 115 to 150 ° C. and a pressure of 1,600 to 2,000 Okgf / when a continuous type. cm 2. It is reported that the process is performed at a temperature of 160 to 200 ° C (Journal of the Chemical Society of Japan, vol. 1, p. 112 (1980)).
- Japanese Patent Application Laid-Open No. 49-83738 discloses that the production of a copolymer of ethylenehexafluoropropylene in the case where the hexafluoropropylene content is 10 to 50 mol% is carried out under a pressure of 40 to 4%. , 00 Okgf / cm 2. Temperature 40-30 It is disclosed to be performed at 0 ° C.
- Japanese Patent Application Laid-Open No. 49-83789 discloses a continuous method of ethylene-hexafluoropropylene copolymer having a hexafluoropropylene content of 7.5 to 8.0 mol%.
- the manufacturing method is disclosed, the pressure is 800 ⁇ 4,000 kgf / cm, preferably 1,000 ⁇ 3,000 kgf / cm ⁇
- the temperature is 90 ⁇ 300. C, preferably 150-250 ° C.
- An object of the present invention is to provide a novel fluorine-based copolymer containing ethylene and hexafluoropropylene.
- the first gist of the present invention is that 60 to 80 mol% of ethylene, 20 to It is a fluorine-based copolymer containing 40 mol% of hexafluoropropylene and 0.1 to 15 mol% of tetrafluoroethylene.
- the second gist of the present invention is that 60 to 80 mol% of ethylene and 20 to 40 mol% of hexafluoropropylene, based on the monomer mixture, are combined with 0.1 to 15 mol% of comonomer.
- a method for producing a fluorine-based copolymer characterized by copolymerizing by radical polymerization at a polymerization pressure of 10 to 4 Okgf / cm 2 in the presence of tetrafluoroethylene.
- a third aspect of the present invention is a fluorine-based elastomer obtained by vulcanizing a copolymer produced by the above method.
- the present invention will be described in detail.
- the copolymers according to the invention comprise, based on the monomer mixture, from 60 to 80 mol% of ethylene, from 20 to 40 mol% of hexafluoropropylene and from 0.1 to 15 mol% of tetrafluoroethylene as a comonomer. In addition, it is obtained by copolymerization.
- the addition of tetrafluoroethylene within this range not only promotes the copolymerization of ethylene and hexafluoropropylene described above, but also provides the fluorinated elastomer obtained from the resulting copolymer with an amine resistance of at least one. Such properties are improved.
- the polymerization is carried out by radical polymerization using a radical polymerization initiator.
- a radical polymerization initiator can be used.
- Known polymerization methods such as solution polymerization, suspension polymerization, and emulsion polymerization can be employed.
- a solvent that dissolves the above monomers for example, R-113 (1,1,2-trichloro-1,2,2-trifluoroethane), R-114 (1,2-dichloro-1,1,2) , 2-tetrafluoroethane), perfluorohexane, C-318 (perfluorocyclobutane), CF 2 C1CFC1CF 2 CF 3 , CF 3 CF C1C F C1C F 3 , perfluorobenzene, C 4 F 6 C1 4
- the monomer is suspended or emulsified in water to carry out the polymerization.
- the reaction can be accelerated by adding a solvent that is insoluble in water and dissolves the monomer to cause polymerization.
- Emulsion polymerization is preferred industrially.
- a water-soluble radical polymerization initiator is used as the polymerization initiator.
- Preferred radical polymerization initiators include potassium persulfate, ammonium persulfate, sodium persulfate-sodium hydrogencarbonate, sodium persulfate ammonium hydrogencarbonate, sodium persulfate-iron sulfate, ammonium sulfate persulfate, and iron sulfate Sodium persulfate, ammonium persulfate, sodium persulfate, sodium persulfate, ammonium persulfate, ammonium persulfate and the like are particularly preferred, and ammonium persulfate is particularly preferred.
- initiator 0.1 to 4.0 g per liter of water.
- the amount of initiator used in a normal emulsification polymerization is usually on the order of mg per liter of water, so that a relatively large amount is used.
- ammonium perfluorooctanoic acid is particularly preferred.
- the emulsifier is used in an amount of 1 to 10% by weight based on pure water. In normal emulsion polymerization One feature is that the amount of emulsifier used is 0.1-1% by weight, which means that it will be used in considerably larger amounts. It the number of particles in the resulting Emarujiyon that by above the critical micelle concentration Emarujon 1 ml per at least 10 14 or more, of that preferably increase the molecular weight of the polymerization reaction rate and polymer produced by the 10 15 or more Based on discovery.
- fluorine-containing systems for example, R- 113, R- 114, C one 318, S- 316 (C 4 F 6 C1 4), CF 2 C1CFC1CF 2 CF 3, CF 3 CFC1CFC1 CF 3 and the like may be added.
- “having no radical activity” means that these solvents do not act as polymerization inhibitors or inhibitors in the polymerization system.
- the addition amount is 5 to 20% by volume based on pure water, and it is within the range where the emulsified state can be maintained.
- the present inventors have found that the addition of R-113 has an unexpected effect of increasing the polymerization rate. It is considered that these solvents act as an emulsification accelerator.
- the polymerization temperature is 40-100 ° C, and the polymerization pressure is 10-4 OkgfZcm 2 .
- polymerization at lower temperature and lower pressure is possible.
- the process of the present invention it is not impossible to add all the monomers to a polymerization vessel containing a medium, for example, an autoclave at a time, but it is necessary to add hexafluoropropylene having a relatively high boiling point in advance among the monomers used.
- the preferred method is to add ethylene and tetrafluoroethylene, which have low boiling points, little by little and to carry out the polymerization while replenishing an amount corresponding to the monomer consumed by the polymerization.
- vulcanizing agent known vulcanizing agents such as peroxyside compounds, polyamine compounds and polyhydroxy compounds can be used.
- peroxyside compounds such as 4-butylperoxybenzoate, 1,1-bis (t-butylperoxy) -3,5,5-trimethylcyclohexane, and 2,5-dimethylhexane.
- 1,2,5-dihydroxyperoxide di-t-butylperoxide, t-butylcumylperoxide, dicumylbaroxide, hi, a-bis (t-butylperoxy) -p-diisopropylbenzene, 2, 5-dimethyl-2,5-di (t-butylperoxy) hexane, 2,5-dimethyl-2,5-di (t-butylperoxy) hexine-13, benzoyl peroxide, t-butylperoxybenzene, 2,5 —Examples include dimethyl 2,5-di (benzoyl peroxy) hexane, t-butyl benzomaleic acid, t-butyl benzoyl isopropyl carbonate, etc. You can do it.
- the amount of the vulcanizing agent is 0.1 to 10 parts by weight, preferably 0.5 to 5 parts by weight, based on 100 parts by weight of the composition.
- the vulcanization aid or co-vulcanization agent is basically effective as long as it has a reaction activity for peroxy radicals and polymer radicals, and the type thereof is not particularly limited.
- Preferred are triaryl cyanurate, triaryl isocyanurate, triacryl formal, triaryl trimellitate, N, N'-m-phenylenebismaleide, dipropargyl terephthalate, diaryl phthalate, tetraaryl And terephthalamide.
- the amount to be used is 0.:! ⁇ 10 parts by weight, preferably 0.5 to 5 parts by weight.
- the fluorine-based copolymer of the present invention may be vulcanized by adding ordinary rubber compounding chemicals such as reinforcing agents, fillers, plasticizers, release agents, softeners, stabilizers, and extenders. .
- the vulcanization of the fluororubber composition of the present invention can be performed under vulcanization conditions of ordinary fluororubber. For example, after kneading a roll of a fluororubber composition, put it in a mold,
- Press vulcanization is performed by holding at 20 to 100 kg / cm2 for 5 to 180 minutes at 100 to 200 ° C, and then oven-curing by holding in a furnace at 150 to 300 ° C for 0 to 40 hours. By vulcanizing, a vulcanized rubber is obtained.
- the fluoroelastomer of the present invention is excellent in amine resistance, it can be used for oil seals for automobiles, valve stem seals, bearing seals, etc., and various sealing materials for chemical plants and the like which require aluminum resistance. it can.
- a transparent dispersion was obtained from inside the tank.
- the solids concentration in the waste puryon was 16.6% by weight.
- the dispersion was broken by freezing.
- the polymer was sufficiently washed with pure water to remove the emulsifier attached to the polymer obtained by coagulation.
- the washed polymer was dried under reduced pressure at 100 ° C to remove water and residual emulsifier.
- the glass transition temperature (Tg) (measured by DSC), decomposition temperature (Td) (measured by DTGA), Mooney viscosity at 140 ° C, and specific gravity at 25 ° C of the obtained polymer were measured (Table 1). .
- Example 1 the molar ratio of the mixed gas of ethylene (E) and tetrafluoroethylene (TFE) was 95: 5 (Example 2), 90:10 (Example 3), and 80:20 (Example 4). Polymerization and treatment were carried out in the same manner as in Example 1 except that 70:30 (Example 5) and 100: 0 (Comparative Example 1) were obtained to obtain a polymer. The yield and Tg, Td, Mooney viscosity, specific gravity, and composition of the obtained polymer were measured in the same manner as in Example 1. These results are shown in Table 1 together with the results obtained with the polymer of Example 1. E / HFP / TFE copolymerization results
- Example 1 98/2 6.0 5.6 36 16.6 338 66/33/1-5 282 59 1.57
- Example 2 95/5 2.5 4,8 36 13.6 257 66/30/4 -2 333 93 1.55
- Example 3.90 / 10 2.5 5.3 36 15.3 308 64/30/7 2 338 120 1.56
- Example 4 80/20 2.5 8.3 31 15.4 268 61/27/11 11 349
- Example 5 70/30 2.5 9.1 31 16.5 323 26 346 95 1.67
- Comparative example 1 100/0 5.0 3.8 36 16.6 335 66/34/0--10 316 43 1.55
- Example 2 the emulsifier C 7 F! 5 C 0 0 to changing the amount of NH 4, except that the contact and the polymerization temperature to 6 5, polymerized in the same manner as in Example 2 having conducted.
- the emulsifier concentration is low, the yield is low even if a large amount of initiator is added.
- the number of particles per ml in the obtained emulsion was determined by the dynamic light scattering method at room temperature using a laser particle size analysis system LPA-3000 / 310 from Otsuka Electronics Co., Ltd. It was calculated from the average particle diameter of the emulsion obtained by the above.
- Example 2 The emulsion was treated in the same manner as in Example 1 to obtain a polymer.
- the yield of the polymer, the composition of the formed polymer, Tg, Td, Muney viscosity and surface tension (room temperature) were measured in the same manner as in Example 1. Table 2 summarizes these results.
- the solids concentration in the waste puryon was 17.2% by weight.
- the dispurgeon was coagulated by freezing.
- the polymer was sufficiently washed with pure water to remove the emulsifier attached to the polymer obtained by the stiffening.
- the washed polymer was dried under reduced pressure at 100 ° C to remove water and residual emulsifier.
- composition, glass transition temperature (Tg), decomposition temperature (Tg :), and molecular weight (by GPC) of the obtained polymer were measured in the same manner as in Example 1.
- Table 3 shows the results.
- the blend was kneaded at room temperature using an open roll.
- This composition had good adhesion to the roll and was easy to knead.
- the obtained dough is put in a mold, press-cured by holding at 160 ° C and 7 lkgfZcni 2 G for 20 minutes, and then oven-cured by holding in a furnace at 200 ° C for 24 hours.
- the 100% tensile stress (M 100 ), tensile strength (T B :), elongation (E B ) and hardness (Hs) of the elastomer obtained by vulcanization in this manner were measured at 25 at JIS K6301. did.
- T B1 and T B2 are the measured T B values before and after immersion, respectively.
- Hs residual value Hs 2 -Hs
- Example 1 1.64 67 160 199 70
- Example 2 1.65 75 187 205 73
- Example 3 1.66 81 223 224 71
- Example 4 1.68 153 303 184
- Comparative example 1 1.64 51 147 200
- Commercial product B 1.87 32 237 358
- Commercially available C 1.87 34 219 314
- Commercially available D 1.64 40 179 258 68 Table 5
- the above elastomer of the present invention was immersed in ethylenediamine at room temperature for 1 hour, but no surface change was observed. In contrast, cracks occurred in Daiel G902.
- copolymerization of ethylene and hexafluoropropylene can be performed under mild conditions, and a novel fluorine-based copolymer can be obtained. Further, an elastomer obtained by vulcanizing the obtained copolymer cannot have amine resistance.
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP94912689A EP0702036B1 (en) | 1993-04-16 | 1994-04-18 | Fluorocopolymer, process for producing the same, and fluoroelastomer |
DE69419417T DE69419417T2 (de) | 1993-04-16 | 1994-04-18 | Fluorcopolymer, verfahren zu dessen herstellung sowie fluorelastomer |
US08/535,046 US5650472A (en) | 1993-04-16 | 1994-04-18 | Fluorine-containing copolymer, process for preparing the same and fluorine-containing elastomer |
JP52298594A JP3521430B2 (ja) | 1993-04-16 | 1994-04-18 | フッ素系共重合体,その製造方法およびフッ素系エラストマー |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP8994093 | 1993-04-16 | ||
JP5/89940 | 1993-04-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1994024175A1 true WO1994024175A1 (en) | 1994-10-27 |
Family
ID=13984706
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1994/000634 WO1994024175A1 (en) | 1993-04-16 | 1994-04-18 | Fluorocopolymer, process for producing the same, and fluoroelastomer |
Country Status (5)
Country | Link |
---|---|
US (1) | US5650472A (ja) |
EP (1) | EP0702036B1 (ja) |
JP (1) | JP3521430B2 (ja) |
DE (1) | DE69419417T2 (ja) |
WO (1) | WO1994024175A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001062807A1 (fr) * | 2000-02-22 | 2001-08-30 | Daikin Industries, Ltd. | Elastomere fluore presentant des proprietes de vulcanisation ameliorees, et moulage par vulcanisation |
EP3524637A1 (en) | 2018-02-09 | 2019-08-14 | Daikin Industries, Ltd. | Fluoroelastomer composition and molded article thereof |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1840142B1 (en) * | 1998-03-25 | 2009-12-02 | Daikin Industries, Ltd. | Method of reducing metal content in fluorine-containing polymer |
JP2002179737A (ja) * | 2000-10-06 | 2002-06-26 | Daikin Ind Ltd | エチレン−ヘキサフルオロプロピレン系共重合体エラストマー |
WO2005028547A1 (ja) * | 2003-09-24 | 2005-03-31 | Daikin Industries, Ltd. | パーフルオロエラストマーシール材 |
CN110467698B (zh) * | 2018-05-10 | 2020-10-09 | 中昊晨光化工研究院有限公司 | 一种乙烯改性聚全氟乙丙烯树脂及其制备方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS4998488A (ja) * | 1972-11-20 | 1974-09-18 | ||
JPS5024343A (ja) * | 1973-06-25 | 1975-03-15 | ||
JPS5067888A (ja) * | 1973-10-15 | 1975-06-06 | ||
JPS60248710A (ja) * | 1984-05-22 | 1985-12-09 | Daikin Ind Ltd | 新規エチレン/テトラフルオロエチレン系共重合体 |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3528954A (en) * | 1967-10-30 | 1970-09-15 | Du Pont | Process for homopolymerization of tetrafluoroethylene and copolymerization of same with fluoro co-monomers in the solvent 1,1,2 - trichloro - 1,2,2 - trifluoroethane |
JPS535354B1 (ja) * | 1971-07-06 | 1978-02-25 | ||
DE2519964C3 (de) * | 1974-05-15 | 1978-12-07 | Daikin Kogyo Co., Ltd. | Wärmehärtbare Kautschukmasse |
JPS5325000A (en) * | 1976-08-20 | 1978-03-08 | Japan Atom Energy Res Inst | Parts for u enriching equipment |
US4123603A (en) * | 1977-05-31 | 1978-10-31 | E. I. Du Pont De Nemours And Company | Fluoroelastomer composition |
JPS5525412A (en) * | 1978-08-11 | 1980-02-23 | Asahi Glass Co Ltd | Preparation of fluorine-containing copolymer |
US4510301A (en) * | 1982-06-01 | 1985-04-09 | E. I. Du Pont De Nemours And Company | Fluorocarbon copolymer films |
CN85100468B (zh) * | 1985-04-01 | 1985-09-10 | 中国科学院上海有机化学研究所 | 四氟乙烯、乙烯三元共聚物的生产方法 |
EP0226116B1 (en) * | 1985-12-18 | 1991-03-06 | Asahi Glass Company Ltd. | Flame-retardant resin |
IT1242304B (it) * | 1990-03-09 | 1994-03-04 | Ausimont Srl | Fluoroelastomeri a base di fluoruro di vinilidene, esafluoropropene e tetrafluoroetilene |
JP3006049B2 (ja) * | 1990-07-26 | 2000-02-07 | ダイキン工業株式会社 | 溶融加工可能なテトラフルオロエチレン共重合体の低分子量体除去方法 |
US5264509A (en) * | 1991-05-15 | 1993-11-23 | Ausimont S.P.A. | Fluoroelastomers based on vinylidene fluoride exhibiting superior resistance to organic bases |
-
1994
- 1994-04-18 EP EP94912689A patent/EP0702036B1/en not_active Expired - Lifetime
- 1994-04-18 US US08/535,046 patent/US5650472A/en not_active Expired - Fee Related
- 1994-04-18 WO PCT/JP1994/000634 patent/WO1994024175A1/ja active IP Right Grant
- 1994-04-18 JP JP52298594A patent/JP3521430B2/ja not_active Expired - Fee Related
- 1994-04-18 DE DE69419417T patent/DE69419417T2/de not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4998488A (ja) * | 1972-11-20 | 1974-09-18 | ||
JPS5024343A (ja) * | 1973-06-25 | 1975-03-15 | ||
JPS5067888A (ja) * | 1973-10-15 | 1975-06-06 | ||
JPS60248710A (ja) * | 1984-05-22 | 1985-12-09 | Daikin Ind Ltd | 新規エチレン/テトラフルオロエチレン系共重合体 |
Non-Patent Citations (1)
Title |
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See also references of EP0702036A4 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001062807A1 (fr) * | 2000-02-22 | 2001-08-30 | Daikin Industries, Ltd. | Elastomere fluore presentant des proprietes de vulcanisation ameliorees, et moulage par vulcanisation |
EP3524637A1 (en) | 2018-02-09 | 2019-08-14 | Daikin Industries, Ltd. | Fluoroelastomer composition and molded article thereof |
US11117992B2 (en) | 2018-02-09 | 2021-09-14 | Daikin Industries, Ltd. | Fluoroelastomer composition and molded article thereof |
Also Published As
Publication number | Publication date |
---|---|
EP0702036B1 (en) | 1999-07-07 |
US5650472A (en) | 1997-07-22 |
EP0702036A4 (en) | 1996-12-18 |
JP3521430B2 (ja) | 2004-04-19 |
EP0702036A1 (en) | 1996-03-20 |
DE69419417T2 (de) | 1999-11-25 |
DE69419417D1 (de) | 1999-08-12 |
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