Patents by Inventor Yuichi Funahashi
Yuichi Funahashi 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: 5250615Abstract: A polyorganosiloxane series thermoplastic resin comprising a graft copolymer obtained from a vinyl monomer and a modified polyorganosiloxane, and a thermoplastic resin composition containing the same. The resin and the composition thereof have excellent slidability, abrasion resistance, weather resistance, cold resistance and impact resistance, and can be applied to new fields such as sliding parts, parts for cold district, outdoor parts, etc.Type: GrantFiled: June 10, 1992Date of Patent: October 5, 1993Assignees: Japan Synthetic Rubber Co., Ltd., Toshiba Silicone Co., Ltd.Inventors: Yuji Yamamoto, Takashi Kurata, Kazuyoshi Nakazawa, Yusuke Tsuda, Junichiro Watanabe, Makoto Matsumoto, Akitsugu Kurita, Yuichi Funahashi
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Patent number: 5171787Abstract: A silicone-based composite rubber composition having good processability on rolls which is obtained by compounding a rubber-forming polymer (A) comprising a polyorganosiloxane and an organic rubber, a silicon compound (B) having at least two hydrolyzable groups per molecule which are able to undergo hydrolysis and condensation reactions with silanols, and a heavy metal compound, amine, or quaternary ammonium salt (C) which catalyzes the hydrolysis and condensation reactions, and allowing the resulting formulation to undergo hydrolysis and condensation reactions while the formulation is kept being deformed by shearing; a crosslinkable, silicone-based composite rubber composition comprising the silicone-based composite rubber composition having blended therewith an organic rubber-crosslinking agent; and an oil seal and a rubber hose both obtained from the crosslinkable, silicone-based composite rubber composition.Type: GrantFiled: June 26, 1990Date of Patent: December 15, 1992Assignees: Japan Synthetic Rubber Co., Ltd., Toshiba Silicone Co., Ltd.Inventors: Yoshiaki Zama, Itsuki Umeda, Seizo Katayama, Yuichi Funahashi, Junichiro Watanabe, Kiyoshi Takeda, Hirofumi Yoshida
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Patent number: 5147947Abstract: A polyorganosiloxane series thermoplastic resin comprising a graft copolymer obtained from a vinyl monomer and a modified polyorganosiloxane, and a thermoplastic resin composition containing the same. The resin and the composition thereof have excellent slidability, abrasion resistance, weather resistance, cold resistance and impact resistance, and can be applied to new fields such as sliding parts, parts for cold district, outdoor parts, etc.Type: GrantFiled: October 31, 1989Date of Patent: September 15, 1992Assignees: Japan Synthetic Rubber Co., Ltd., Toshiba Silicone Co., Ltd.Inventors: Yuji Yamamoto, Takashi Kurata, Kazuyoshi Nakazawa, Yusuke Tsuda, Junichiro Watanabe, Makoto Matsumoto, Akitsugu Kurita, Yuichi Funahashi
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Patent number: 5032643Abstract: There is disclosed a process for producing polyorganosiloxanes, comprising that an organosiloxane having a structural unit represented by the following general formula: ##STR1## (in which R.sup.1 represents a substituted or unsubstituted monovalent organic group; and n represents an integer of 0 tp 3) is subjected to emulsion polymerization in an aqueous medium in the presence of an organic sulfonic acid and a trihalogenated acetic acid.Type: GrantFiled: November 8, 1989Date of Patent: July 16, 1991Assignee: Toshiba Silicone Co., Ltd.Inventors: Makoto Matsumoto, Junichiro Watanabe, Akitsugu Kurita, Yuichi Funahashi
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Patent number: 4876363Abstract: Epoxy group-containing organic silicon compounds represented by general formula (I): ##STR1## wherein R, which may be the same or different, each represents a monovalent hydrocarbon group free from an aliphatic unsaturated bond; a represents 1 or 2; and n represents an integer of 2 to 6. The epoxy-containing organic silicon compounds contain no hydrolyzable group therein and are suited for use in coupling of organic compounds and modification or crosslinking of polymers.Type: GrantFiled: August 30, 1988Date of Patent: October 24, 1989Assignee: Toshiba Silicone Co., Ltd.Inventors: Yuichi Funahashi, Junichiro Watanabe, Kiyoshi Takeda, Makaoto Matsumoto
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Patent number: 4814475Abstract: A vinylsilane compound represented by general formula (I):R.sup.1 CH.sub.2 CH.sub.2 SiR.sub.a.sup.2 (CH.dbd.CH.sub.2)3-a (I)wherein R.sup.1 represents a monovalent alicyclic unsaturated hydrocarbon group selected from the group consisting of a cyclohexenyl group and a bicycloheptenyl group; R.sup.2 represents a monovalent hydrocarbon group free from an aliphatic unsaturated bond; and a represents 1 or 2, is herein disclosed.Type: GrantFiled: September 8, 1988Date of Patent: March 21, 1989Assignee: Toshiba Silicone Co., Ltd.Inventors: Yuichi Funahashi, Junichiro Watanabe, Kiyoshi Takeda, Makaoto Matsumoto
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Patent number: 4728687Abstract: A vulcanizable silicone elastomer composition which has novel crosslinking points comprises (A) 100 parts by weight of a polyorganosiloxane having a polymerization degree of at least 100, wherein the organic groups are selected from monovalent substituted and unsubstituted hydrocarbon groups and are attached to silicon atoms at a rate, on average, in the range of 1.98 to 2.02 per silicon atom and at least two of the organic groups are monovalent hydrocarbon groups possessing at least five carbon atoms and a carbon-carbon double bond issuing from a silicon atom through at least one carbon atom, (B) 5 to 200 parts by weight of an inorganic filler having a specific surface area of at least 50 m.sup.2 /g, and (C) 0.05 to 15 parts by weight of an organic peroxide.Type: GrantFiled: January 29, 1987Date of Patent: March 1, 1988Assignee: Toshiba Silicone Co., Ltd.Inventors: Junichiro Watanabe, Yuichi Funahashi, Kazuo Sugiura, Hironori Matsumoto
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Patent number: 4714734Abstract: Rubber compounds comprising a specific type of polyorganosiloxane of the following formula ##STR1## in which R and R' independently represent a hydrocarbon substituent and n is an integer of not smaller than 3 provided that at least 6 mole % of the substituents R and R' consists of a hydrocarbon group having Small's molecular attraction constant not smaller than 350. Carbon black is added to the polyorganosiloxane whereby various physical properties are improved including breaking strength, water and hot water resistances. The rubber compound may further comprise at least one organic rubber other than the above polyorganosiloxane.Type: GrantFiled: February 25, 1986Date of Patent: December 22, 1987Assignees: Bridgestone Corp., Toshiba Silicone Co., Ltd., Japan Synthetic Rubber Co., Ltd.Inventors: Takatsugu Hashimoto, Akihiro Maehara, Seisuke Tomita, Yuichi Funahashi, Junichiro Watanabe, Kazuo Sugiura, Hironori Matsumoto
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Patent number: 4657965Abstract: A silicone elastomer composition which has novel crosslinking points comprises (A) 100 parts by weight of a polyorganosiloxane of a polymerization degree of at least 20, wherein the organic groups are selected from monovalent substituted and unsubstituted hydrocarbon groups and are attached to silicon atom, and at least two of the organic groups are monovalent hydrocarbon groups possessing at least five carbon astoms and a carbon-carbon double bond bonded to a silicon atom via at least one carbon atom, (B) 5 to 200 parts by weight of an inorganic filler having a specific surface area of at least 50 m.sup.2 /g, and (C) 0.1 to 25 parts by weight of a vulcanizer selected from the group consisting of sulfur, sulfur donor, substituted or unsubstituted alkylphenol resins, and quinoids.Type: GrantFiled: October 21, 1985Date of Patent: April 14, 1987Assignees: Toshiba Silicone Co., Ltd., Japan Synthetic Rubber Co., Ltd.Inventors: Junichiro Watanabe, Yuichi Funahashi, Kazuo Sugiura, Hironori Matsumoto
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Patent number: 4640968Abstract: A polysiloxane containing an ethylidene norbornyl group possesses a terminal group represented by the formula: ##STR1## wherein R.sup.1 stands for a monovalent hydrocarbon group, a hydroxyl group, an alkoxy group, or at least one of the hydrocarbon groups represented by Y, and each R.sup.2 stands for the same or different groups selected from the class consisting of hydrogen, monovalent hydrocarbon groups, and a group represented by R.sup.1 wherein R.sup.1 has the same meaning as defined above, and being substantially in the form of a straight chain, 0 to 100 mol %, providing that 100 mol % is excluded where neither of the R.sup.1 's in the terminal groups is a hydrocarbon group represented by Y of the component units being represented by the formula: ##STR2## wherein each R.sup.3 's stand for the same or different groups selected from the class consisting of hydrogen and monovalent hydrocarbon groups and 100 to 0 mol %, providing that 0 mol % is excluded where neither of the R.sup.Type: GrantFiled: October 15, 1985Date of Patent: February 3, 1987Assignee: Toshiba Silicone Co., Ltd.Inventors: Junichiro Watanabe, Yuichi Funahashi, Kazuo Sugiura, Hironori Matsumoto
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Patent number: 4623739Abstract: A nitrogen-containing organosilicon compound represented by the general formula:(Y.sub.a R.sup.1.sub.3-a Si)bNHR.sup.2.sub.2-bwherein R.sup.1 stands for a saturated or unsaturated monovalent hydrocarbon group of 1 to 8 carbon atoms, R.sup.2 for a saturated or unsaturated monovalent hydrocarbon group of 1 to 6 carbon atoms, Y for ##STR1## a for an integer of the value of 1 to 3, and b for an integer of the value of 1 to 2.Type: GrantFiled: January 24, 1986Date of Patent: November 18, 1986Assignee: Toshiba Silicone Co., Ltd.Inventors: Junichiro Watanabe, Yuichi Funahashi
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Patent number: 4623741Abstract: An ethylidenenorbornyl group-containing chlorosilanes compound represented by the general formula:Y.sub.a (R.sup.1).sub.b Si(Cl).sub.4-a-bwherein R.sup.1 stands for a saturated or unsaturated monovalent hydrocarbon group of 1 to 8 carbon atoms, Y for ##STR1## a for an integer of the value of 1 to 3, b for an integer of the value of 0 to 2, and a+b for an integer of the value of 1 to 3.Type: GrantFiled: January 24, 1986Date of Patent: November 18, 1986Assignee: Toshiba Silicone Co., Ltd.Inventors: Junichiro Watanabe, Yuichi Funahashi
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Patent number: 4599440Abstract: Disclosed is an organocyclosiloxane which comprises a compound having the following formula: ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, represent a hydrogen atom or a monovalent hydrocarbon group having 1 to 8 carbon atoms; Y represents ##STR2## m is an integer of 3 to 5 and n is an integer of 1 to m.Type: GrantFiled: August 30, 1985Date of Patent: July 8, 1986Assignee: Toshiba Silicone Co., Ltd.Inventors: Junichiro Watanabe, Yuichi Funahashi