Patents by Inventor Masayasu Tomoda
Masayasu Tomoda has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5891941Abstract: A fluororubber composition comprising a fluororubber, a vulcanizing agent and 0.1 to 5 wt. parts of a fatty acid monoamide per 100 wt. parts of said fluororubber. This fluororubber composition is excellent in mold releasability, and a molded article obtained by vulcanizing and molding the composition suffers less deterioration of mechanical properties caused by the addition of an internal mold release agent.Type: GrantFiled: June 28, 1996Date of Patent: April 6, 1999Assignee: Daikin Industries Ltd.Inventors: Hiroyuki Tanaka, Koji Matsumoto, Yutaka Ueta, Masayasu Tomoda
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Patent number: 5470917Abstract: A vulcanizable rubber composition which contains an iodine- or bromine-containing rubber and an organic peroxide of the formula. ##STR1## wherein R.sup.1 is a hydrogen atom, a chlorine atom or methyl group, R.sup.2 is a linear or branched alkyl group having 2 to 5 carbon atoms, and n is an integer of 1 to 3, generates only a small amount of methyl iodide or methyl bromide during the vulcanization.Type: GrantFiled: January 4, 1994Date of Patent: November 28, 1995Assignee: Daikin Industries LimitedInventors: Shuji Suyama, Hideyo Ishigaki, Masayasu Tomoda, Yoshihiro Shirai, Hiroyuki Tanaka, Masaharu Komai
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Patent number: 5430103Abstract: The present invention provides a crosslinkable composition which comprises an internally crosslinked acrylic elastomer which is crosslinkable with a peroxide, a fluoroelastomer and a crosslinking agent for at least one of the elastomers.A crosslinkable composition of the present invention can afford a molding which are excellent in physical properties such as mechanical strength and compression set, heat resistance and workability.Type: GrantFiled: December 7, 1993Date of Patent: July 4, 1995Assignees: Daikin Industries, Ltd., Nissin Chemical Industry Co., Ltd.Inventors: Hiroyuki Ohata, Satoshi Terasaki, Etsuo Minamino, Masayasu Tomoda, Yoshihiro Shirai, Tsuyoshi Noguchi, Kazuhisa Matsumoto
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Patent number: 5296549Abstract: A vulcanizable rubber composition which contains an iodine- or bromine-containing rubber and an organic peroxide of the formula: ##STR1## wherein R.sup.1 is a hydrogen atom, a chlorine atoms or methyl group, R.sup.2 is a linear or branched alkyl group having 2 to 5 carbon atoms, and n is an integer of 1 to 3, generates only a small amount of methyl iodide or methyl bromide during the vulcanization.Type: GrantFiled: March 27, 1992Date of Patent: March 22, 1994Assignee: Daikin Industries Ltd.Inventors: Shuji Suyama, Hideyo Ishigaki, Masayasu Tomoda, Yoshihiro Shirai, Hiroyuki Tanaka, Masaharu Komai
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Patent number: 5214097Abstract: A fluororubber composition comprising 100 parts by weight of a rubber mixture which comprises 5 to 70% by weight of at least one rubber selected from the group consisting of diene rubbers and polyolefin rubbers and 95 to 30 by weight of a fluororubber and 1 to 20 parts by weight of a block copolymer which comprises a vinyl monomer and a fluorovinyl monomer, which has good compatibility between the rubber components and gives a cured material having improved chemical resistance, heat resistance, oil resistance, and the like.Type: GrantFiled: May 15, 1991Date of Patent: May 25, 1993Assignee: Daikin Industries Ltd.Inventors: Masayasu Tomoda, Shigeru Morita, Etsuo Minamino, Eisuke Yamada, Hiroshi Okamoto, Shinji Inagaki, Junji Furukawa
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Patent number: 5001278Abstract: A fluorovinyl ether of the formula:XCH.sub.2 CF.sub.2 CF.sub.2 --(OCH.sub.2 CF.sub.2 CF.sub.2).sub.m --(OCFYCF.sub.2).sub.n --OCF.dbd.CF.sub.2 (I)wherein X is a hydrogen atom or a halogen atom (e.g. fluorine, chlorine, bromine and iodine); Y is a fluorine atom or a trifluoromethyl group; m is an integer of 0 to 5; and n is 0, 1 or 2, which can modify a polymer of at least one ethylenically unsaturated compound.Type: GrantFiled: March 24, 1988Date of Patent: March 19, 1991Assignee: Daikin Industries, Ltd.Inventors: Masahiko Oka, Yuji Yutani, Masayasu Tomoda, Mitsuru Kishine, Tetsuo Shimizu
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Patent number: 4931511Abstract: A cross-linkable coating composition comprising a fluorine-containing elastomeric copolymer which comprises (a) 50 to 95% by mole of repeating units derived from a fluoroolefin of the formula:CF.sub.2 .dbd.CXY (I)wherein X and Y are the same or different and a fluorine atom or a chlorine atom, (b) 50 to 5% by mole of repeating units derived from a perfluorovinyl ether of the formula:R.sub.f --[OCFZCF.sub.2 (CF.sub.2).sub.m ].sub.n --OCF.dbd.CF.sub.2 (II)wherein R.sub.f is a C.sub.1 -C.sub.6 perfluoroalkyl group, Z is a fluorine atom or a trifluoromethyl group, n is an integer of 0 to 5 and m is 0 to 1 provided that when m is 1 (one), X is not a trifluoromethyl group and a cross-linking agent for the copolymer, the copolymer and the cross-linking agent being dissolved or dispersed in a fluorosolvent is provided.Type: GrantFiled: September 16, 1988Date of Patent: June 5, 1990Assignee: Daikin Industries, Ltd.Inventors: Shoji Kawachi, Masayasu Tomoda, Masahiko Oka, Yasuyoshi Furukawa, Hiroyuki Tanaka
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Patent number: 4766190Abstract: An elastomeric fluoropolymer comprising 12 to 50% by mole of repeating units derived from a perfluorovinyl ether of the formula:CF.sub.2 .dbd.CFO--(CF.sub.2 CFXO).sub.m --R.sub.f (I)wherein R.sub.f is a C.sub.1 -C.sub.6 perfluoroalkyl group, X is a fluorine atom or a trifluoromethyl group and m is an integer of 1 to 5, 50 to 88% by mole of repeating units derived from tetrafluoroethylene and 0.1 to 5% by mole of repeating units of hexafluoropropylene having improved strength and compression set.Type: GrantFiled: October 10, 1986Date of Patent: August 23, 1988Assignee: Daikin Industries Ltd.Inventors: Shigeru Morita, Kazuhiko Kuwahara, Masayasu Tomoda, Masahiko Oka
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Patent number: 4696989Abstract: A copolymer comprising repeating units derived from tetrafluoroethylene, vinylidene fluoride and hexafluoropropylene in a molar ratio within an area defined on a tetrafluoroethylene, vinylidene fluoride and hexafluoropropylene ternary composition diagram by a hexagon with its first vertex A at 34.0% by weight of tetrafluoroethylene, 8.5% by weight of vinylidene fluoride and 57.5% by weight of hexafluoropropylene; its second vertex B at 26.5% by weight of tetrafluoroethylene, 14.5% by weight of vinylidene fluoride and 59.0% by weight of hexafluoropropylene; its third vertex C at 31.0% by weight of tetrafluoroethylene, 24.0% by weight of vinylidene fluoride and 45.0% by weight of hexafluoropropylene; its fourth vertex D at 49.0% by weight of tetrafluoroethylene, 26.5% by weight of vinylidene fluoride and 24.5% by weight of hexafluoropropylene; its fifth vertex E at 49.0% by weight of tetrafluoroethylene, 11.0% by weight of vinylidene fluoride and 40.Type: GrantFiled: April 9, 1986Date of Patent: September 29, 1987Assignee: Daikin Industries, Ltd.Inventors: Masahiko Oka, Yutaka Ueta, Hideo Kano, Masayasu Tomoda, Shoji Kawachi
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Patent number: 4670328Abstract: An impregnated material comprising an organic or inorganic material selected from the group consisting of a woven fabric, a non-woven fabric and an open cell porous material which is impregnated with a copolymer which comprises 50 to 95% by mole of repeating units derived from tetrafluoroethylene and 5 to 50% by mole of repeating units derived from perfluoroalkyl vinyl ether of the formula:CF.sub.2 .dbd.CFOR.sub.f (I)wherein R.sub.f is a C.sub.1 -C.sub.6 perfluoroalkyl group or a group of the formula:--(CF.sub.2 CFXO).sub.n --R.sub.f (II)wherein R.sub.f is the same as defined above, X is a fluorine atom or a trifluoromethyl group and n is an integer of 1 to 10, which has good chemical, corrosion, solvent and oil resistance as well as water- and oil-repellence.Type: GrantFiled: February 28, 1986Date of Patent: June 2, 1987Assignee: Daikin Industries, Ltd.Inventors: Shoji Kawachi, Masayasu Tomoda, Yutaka Ueta, Masahiko Oka
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Patent number: 4603175Abstract: A thermoplastic fluoroelastomer composition comprising a thermoplastic fluoroelastomer, a liquid fluoroelastomer and optionally a cross-linking agent, which is easily ejection molded and cross-linked at a room temperature to afford a cross-linked material having excellent heat resistance, oil resistance and corrosion resistance.Type: GrantFiled: July 25, 1984Date of Patent: July 29, 1986Assignee: Daikin Industries, Inc.Inventors: Shoji Kawachi, Masayasu Tomoda, Hiroyuki Tanaka, Mitsuru Kishine
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Patent number: 4530972Abstract: A fluorine-containing polymer substantially comprising (A) at least one fluorine-containing olefin of the formula:CF.sub.2 =CXYwherein X is a hydrogen atom or a fluorine atom and Y is a hydrogen atom, a chlorine atom, a fluorine atom, a trifluoromethyl group, a difluoromethyl group, a C.sub.1 -C.sub.3 perfluoroalkoxy group or a group of the formula:--(CF.sub.2).sub.m COOMwherein m is an integer of 0 to 3 and M is a hydrogen atom, a C.sub.1 -C.sub.4 alkyl group, a sodium atom or a potassium atom but when X is a hydrogen atom, Y is always a hydrogen atom, (B) one or more C.sub.4 -C.sub.8 fluorine-containing dienes, (C) at least one iodine atom and (D) at least one saturated or unsaturated fluoro or chlorofluorohydrocarbon group, the molar ratio of the diene (B) and the olefin (A) being from 1.times.10.sup.-4 to 5.times.10.sup.-2, the iodine atom(s) (C) being from 0.001 to 10% by weight based on the weight of the polymer and the molar ratio of the group (D) and the olefin (A) being from 1.times.10.sup.-5 to 5.Type: GrantFiled: September 30, 1982Date of Patent: July 23, 1985Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayoshi Tatemoto, Yasuyoshi Furukawa, Masayasu Tomoda, Masahiko Oka, Shigeru Morita
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Patent number: 4501869Abstract: An easily cross linkable fluorine-containing polymer comprising: (1) a polymeric chain comprising one or more polymer segments, at least one polymer segment of which consists of units of at least one fluorine-containing ethylenically unsaturated compound having 2 to 8 carbon atoms, or units of said fluorine-containing ethylenically unsaturated compound and at least one other monomer selected from the group consisting a fluorine-free ethylenically unsaturated compound having 2 to 4 carbon atoms and a fluorine-containing diene having 4 to 8 carbon atoms, (2) at least one bromine atom liberated from a brominated compound of the formula: RBr.sub.x (wherein R is a saturated hydrocarbon residue and x is a number corresponding to the bonding valency of the residue R) in an amount of 0.Type: GrantFiled: July 26, 1983Date of Patent: February 26, 1985Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayoshi Tatemoto, Masahiko Oka, Hideo Kano, Masayasu Tomoda, Yutaka Ueta
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Patent number: 4491536Abstract: A fluoroelastomer composition comprising a cross-linkable fluoroelastomer and/or a thermoplastic fluoroelastomer and carbon fiber having a low volume resistivity of 10.sup.-1 to 10.sup.13 ohm.cm.Type: GrantFiled: September 29, 1983Date of Patent: January 1, 1985Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayasu Tomoda, Shoji Kawachi, Hiroyuki Tanaka
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Patent number: 4339565Abstract: An adhesive composition for fluorinated rubbers which comprises a fluorine-containing epoxy compound and a silane compound having an organic functional group.Type: GrantFiled: November 28, 1980Date of Patent: July 13, 1982Assignee: Daikin Kogyo Co., Ltd.Inventor: Masayasu Tomoda
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Patent number: 4260698Abstract: A co-crosslinkable blend composition which comprises (1) an iodine-containing fluoroelastomer, (2) at least one of silicone oligomers, silicone elastomers, fluorosilicone elastomers, phosphonitrilic fluoroelastomers, tetrafluoroethylene/propylene copolymers and hexafluoropropylene/ethylene copolymers and (3) an organic peroxide.Type: GrantFiled: October 4, 1979Date of Patent: April 7, 1981Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayoshi Tatemoto, Masayasu Tomoda, Yutaka Ueta
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Patent number: 4251399Abstract: A co-crosslinkable blend composition which comprises an iodine-containing fluoroelastomer, an elastomer crosslinkable in the presence of a peroxy radical and an organic peroxide.Type: GrantFiled: October 5, 1979Date of Patent: February 17, 1981Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayasu Tomoda, Yutaka Ueta
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Patent number: 4250278Abstract: A vulcanizable fluorinated rubber composition comprising a fluorinated rubber containing --CH.sub.2 --CF.sub.2 -- units in the polymeric chain, a vulcanizing agent and a vulcanization accelerator as the essential components, characterized in that the vulcanizing agent is a fluorine-containing polyhydroxy aliphatic compound.Type: GrantFiled: May 1, 1979Date of Patent: February 10, 1981Assignee: Daikin Kogyo Co., Ltd.Inventors: Takeshi Suzuki, Yasuyoshi Furukawa, Masayasu Tomoda, Yutaka Ueta, Akira Ohmori
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Patent number: 4243770Abstract: An easily cross linkable fluorine-containing polymer substantially comprising: (1) a polymeric chain comprising one or more polymer segments, of which at least one polymer segment consisting of units of vinylidene fluoride alone or of units of vinylidene fluoride and one or more of other fluoroolefins, and (2) at least one iodine atom liberated from an iodinated compound of the formula: RI.sub.x (wherein R is a saturated or unsaturated fluorohydrocarbon or chlorofluorohydrocarbon residue having 1 to 8 carbon atoms and x is an integer of 1 or 2 corresponding to the bonding valency of the residue R) in an amount of 0.Type: GrantFiled: April 7, 1978Date of Patent: January 6, 1981Assignee: Daikin Kogyo Co., Ltd.Inventors: Masayoshi Tatemoto, Takeshi Suzuki, Masayasu Tomoda, Yasuyoshi Furukawa, Yutaka Ueta
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Patent number: 4196255Abstract: A crosslinkable elastomeric composition which comprises an epichlorohydrin elastomer, a divalent metal oxide or hydroxide, a fluorine-containing polyhydroxy compound and a basic compound having a nitrogen or phosphorus atom in the molecule.Type: GrantFiled: March 9, 1979Date of Patent: April 1, 1980Assignee: Daikin Kogyo Co., Ltd.Inventors: Takeshi Suzuki, Yasuyoshi Furukawa, Masayasu Tomoda, Yutaka Ueta