Patents by Inventor Fumito Yatsuyanagi
Fumito Yatsuyanagi 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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Publication number: 20030195302Abstract: A rubber composition comprising a vulcanizable rubber, a reinforcing filler, a softening agent, and other reagents for rubber to which is added in a specific amount of a sulfur compound having the formula (I):Type: ApplicationFiled: December 23, 2002Publication date: October 16, 2003Applicant: The Yokohama Rubber Co., LtdInventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Shuichi Fukutani
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Publication number: 20030125474Abstract: A rubber composition of (i) 100 parts by weight of a starting rubber of (A) 40 to 120 parts of SBR and carbon black (CB) having an N2SA of at least 70 m2/g, (B) 40 to 120 parts by weight of an NR-CB rubber composition of NR and CB having an N2SA of at least 70 m2/g, and (C) BR and/or SBR having a Tg higher by at least 10° C. than that of the SBR in the SBR-CB rubber composition (A), wherein the rubber composition has a ratio of the average value FMB of the concentration of CB to the amount of rubber in the CB-containing rubber compositions (A) and (B) and the concentration FCOM of CB to the amount of rubber in the rubber composition of 1.2 to 3.0. In addition a rubber composition containing a CB-containing natural rubber master batch obtained by mixing a natural rubber (NR) starting latex and carbon black (CB) in a water-based medium and coagulating and drying it, an additional starting rubber having a glass transition temperature (Tg) of −50° C. to −20° C.Type: ApplicationFiled: June 19, 2002Publication date: July 3, 2003Inventor: Fumito Yatsuyanagi
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Publication number: 20030114577Abstract: A rubber composition (COM) obtained by dissolving solution polymerized BR or SBR having a Tg of −100° C. to −40° C. in an organic solvent to form a starting rubber solution, by adding and mixing thereto silica or a mixture of carbon black and silica, silane coupling agent, and softening agent, followed by drying to obtain a master batch (MB) of the silica or carbon black/silica with rubber, adding thereto BR or SBR (R) having a Tg of at least 10° C. higher than the Tg of the starting rubber in the MB, and mixing in an internal mixer, wherein the ratio FMB/FCOM of the concentration FMB of the silica or the mixture of carbon black and silica based upon the rubber in the MB and the concentration FCOM of the silica or the mixture of carbon black and silica based upon the COM is 1.2 to 3.0.Type: ApplicationFiled: September 24, 2002Publication date: June 19, 2003Inventors: Fumito Yatsuyanagi, Makoto Ashiura
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Patent number: 6525110Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000: ≡Si—OR1 (I) ≡Si—OCOR2 (II) wherein, R1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.Type: GrantFiled: November 16, 2000Date of Patent: February 25, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Yoshiaki Hashimura, Tetsuji Kawazura, Hiroyuki Kaido
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Patent number: 6518367Abstract: A rubber composition comprising a vulcanizable rubber, a reinforcing filler, a softening agent, and other reagents for rubber to which is added in a specific amount of a sulfur compound having the formula (I): —(SxR1)n— (I) wherein R1 represents an organic group, x is a number of 3 to 5 on average, and n is an integer of 1 to 100, or a specific sulfur compound (1) and sulfur (2), and optionally a thiazole base, sulfenamide base, thiuram base, and/or diothio acid base vulcanization accelerator (3).Type: GrantFiled: February 15, 2000Date of Patent: February 11, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Shuichi Fukutani
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Patent number: 6465579Abstract: A silica-polymer composite, featuring a low viscosity and excellent processability when being kneaded with a rubber and superior in dispersibility and tensile strength, comprising a polymer having a polar group containing a hetero atom and a benzene ring or a polymer having a carboxylic acid reacted with silica in a solution.Type: GrantFiled: February 14, 2000Date of Patent: October 15, 2002Assignee: The Yokohama Rubber Co., Ltd.Inventors: Keisuke Chino, Fumito Yatsuyanagi, Hidekazu Onoi
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Patent number: 6433066Abstract: A rubber composition superior in dispersion and abrasion resistance, containing precipitated silica having an aluminum content of 0.01 to 0.24 wt %.Type: GrantFiled: April 10, 2001Date of Patent: August 13, 2002Assignee: The Yokohama Rubber Co., Ltd.Inventors: Yoshiaki Kirino, Fumito Yatsuyanagi
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Patent number: 6337361Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000: ≡Si—OR1 (I) ≡Si—OCOR2 (II) wherein, R1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms. The polysiloxane is impregnated in an inert powder.Type: GrantFiled: March 16, 2000Date of Patent: January 8, 2002Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Yoshiaki Hashimura, Tetsuji Kawazura, Hiroyuki Kaido
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Patent number: 6329460Abstract: A polysiloxane composition comprising (i) an alkoxysilyl group-containing polysiloxane containing at least six siloxane structures having the following formula (I) in a molecule wherein R1 represents a methyl group, ethyl group or phenyl group, and R2 represents a group selected from the group consisting of hydrocarbon group and ether bond-containing hydrocarbon groups having 1 to 6 carbon atoms; and (ii) an alcohol having the formula R4(OR5)p—OH wherein R4 represents a C1-C18 alkyl group, a phenyl group or a benzyl group, R5 represents C1-C6 alkylene group and p is an integer of 0-20.Type: GrantFiled: April 11, 2000Date of Patent: December 11, 2001Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kazunori Ishikawa, Fumito Yatsuyanagi, Hiroyuki Kaido, Naoya Adachi
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Publication number: 20010041765Abstract: A rubber composition superior in dispersion and abrasion resistance, containing precipitated silica having an aluminum content of 0.01 to 0.24 wt %.Type: ApplicationFiled: April 10, 2001Publication date: November 15, 2001Applicant: THE YOKOHAMA RUBBER CO., LTD.Inventors: Yoshiaki Kirino, Fumito Yatsuyanagi
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Patent number: 6310158Abstract: A butyl rubber having at least one repeating unit of the formulae (I) and (II): wherein R independently represents a hydrogen atom or at least one group selected from the group consisting of methyl, ethyl, propyl, isopropyl and butyl groups.Type: GrantFiled: June 25, 1999Date of Patent: October 30, 2001Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kazunori Ishikawa, Fumito Yatsuyanagi
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Patent number: 6191247Abstract: A polysiloxane composition comprising (A) a polysiloxane having a group represented by the formula (I): ≡Si—OR (I) wherein, R is a C1 to C18 substituted or unsubstituted monovalent hydrocarbon group or ether bond containing an organic group; and (B) at least 1 ppm of (a) a compound having an N, P, S, Sn, or As component or (b) an acetylene alcohol and a rubber composition containing the same. Specific polysiloxanes (A) contain both formula (I): ≡Si—OR as well as Si—H.Type: GrantFiled: April 4, 1997Date of Patent: February 20, 2001Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kazunori Ishikawa, Fumito Yatsuyanagi, Tetsuji Kawazura
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Patent number: 6177505Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000: ≡Si—OR1 (I) ≡Si—OCOR2 (II) wherein, R1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.Type: GrantFiled: August 30, 1996Date of Patent: January 23, 2001Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Yoshiaki Hashimura, Tetsuji Kawazura, Hiroyuki Kaido
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Patent number: 6147659Abstract: The present invention relates to a reliable transponder 3 for a tire and a reliable transponder-provided tire which are not broken while the tire runs or the tire is formed or cured, by using various metallic component members used in the tire as an antenna directly connected to the transponder 3 and thereby, further decreasing the transponder 3 in size. For example, by electrically directly connecting the transponder 3 with a conductive wire 131 or bead wire 161 in a jointless belt 13A set to the inner and outer peripheries of the tire, the wire 131 or bead wire 161 is used as the receiving and transmitting antenna of the transponder 3. Thereby, it is possible to decrease the transponder 3 in size and to increase the communication distance between an interrogator and the transponder 3 without increasing the transmission power of the interrogator.Type: GrantFiled: June 8, 1998Date of Patent: November 14, 2000Assignee: Yokohama Rubber Co., Ltd.Inventors: Osamu Takahashi, Kazuhiro Shimura, Fumito Yatsuyanagi
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Patent number: 6140450Abstract: A polysiloxane having a siloxane structure of the following formulas (1) and (2): ##STR1## wherein, R.sup.1 is a C.sub.1 to C.sub.6 alkyl group or C.sub.1 to C.sub.21 acyl group, a is 1 to 200, b is 1 to 200, t is 2 or 3 and r is 1 to 100, and a rubber composition containing the same.Type: GrantFiled: August 26, 1998Date of Patent: October 31, 2000Assignee: The Yokohama Rubber Co., Ltd.Inventors: Kazunori Ishikawa, Fumito Yatsuyanagi
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Patent number: 6121347Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a compounding agent consisting of a silane coupling agent and a carbon black, calcium carbonate or stearic acid powder impregnated with a polysiloxane having the following alkoxysilyl group (I) and/or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000:.tbd.Si--OR.sup.1 (I).tbd.Si--OCOR.sup.2 (II)wherein, R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R.sup.2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.Type: GrantFiled: November 10, 1998Date of Patent: September 19, 2000Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Yoshiaki Hashimura, Tetsuji Kawazura, Hiroyuki Kaido
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Patent number: 6103811Abstract: A rubber composition for a tire comprising:100 parts by weight of a starting rubber;10 to 150 parts by weight of a carbon black;0.1 to 20 parts by weight of a sulfur; and40 parts by weight or less of a polysiloxanehaving the following alkoxysilyl group (I) or acyloxysilyl group (II) and having an average degree of polymerization of 3 to 10,000:.tbd.Si--OR.sup.1 (I).tbd.Si--OCOR.sup.2 (II)wherein R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group or an organic group containing an ether bond and having 1 to 18 carbon atoms and R.sup.2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms.Type: GrantFiled: May 8, 1998Date of Patent: August 15, 2000Assignee: The Yokohama Rubber Co., Ltd.Inventors: Shingo Midorikawa, Fumito Yatsuyanagi, Kazunori Ishikawa
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Patent number: 6084015Abstract: A rubber composition comprising a diene rubber, a reinforcing agent and a compound containing radicals capable of being stably present at room temperature in the presence of oxygen in the molecule thereof, selected from the group consisting of nitroxide radicals, hydrazyl radicals, allyloxyl radicals, and trityl radicals and the analogues thereof or a compound having at least one substituent group selected from amino groups, isocyanate groups, hydroxyl groups, carboxyl groups, oxirane groups, and thiirane groups.Type: GrantFiled: June 24, 1998Date of Patent: July 4, 2000Assignee: The Yokohama Rubber Co., Ltd.Inventors: Keisuke Chino, Fumito Yatsuyanagi, Hiroyuki Kaido, Masahiro Ikawa, Masayoshi Ito
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Patent number: 6077899Abstract: (i) A starting rubber (A) comprising a terminal-modified and/or coupled diene rubber and having an average glass transition temperature TgA (.degree. C.) is mixed with a specific amount of the reinforcing agent are mixed at a temperature of at least 135.degree. C., followed by adding a starting rubber (B) comprising a terminal unmodified diene rubber and having a specific average glass transition temperature TgB (.degree. C.), and the remaining reinforcing agent and a softening agent; (ii) a starting diene rubber (A') having a specific weight average molecular weight Mw(A') and average glass transition temperature TgA' (.degree. C.) is contacted with a reinforcing agent, followed by adding a starting diene rubber (B') having a specific weight average molecular weight Mw(B) and average glass transition temperature TgB' (.degree. C.Type: GrantFiled: November 19, 1997Date of Patent: June 20, 2000Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Hiroyuki Kaido, Tetsuji Kawazura
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Patent number: 6033597Abstract: A rubber composition having improved properties containing a starting rubber (e.g., diene rubber) and a compounding agent comprising a mixture of a polysiloxane having the following alkoxysilyl group (I) and having an average degree of polymerization of 3 to 10,000:.tbd.Si--OR.sup.1 (I).tbd.Si--OCOR.sup.2 (II)wherein, R.sup.1 is a substituted or unsubstituted monovalent hydrocarbon group having 1 to 18 carbon atoms or an organic group containing an ether bond and R.sup.2 is hydrogen or a hydrocarbon group having 1 to 21 carbon atoms, and a sulfur containing silane.Type: GrantFiled: November 10, 1998Date of Patent: March 7, 2000Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Yoshiaki Hashimura, Tetsuji Kawazura, Hiroyuki Kaido