Patents by Inventor Takafumi Sakamoto

Takafumi Sakamoto 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).

  • Publication number: 20210127452
    Abstract: According to one embodiment, an electronic apparatus includes a transmitter and a processor. The transmitter transmits a signal to a first electronic apparatus with one of patterns including at least a first pattern which is a first order and which uses first to n-th frequency bands in first to n-th periods and a second pattern which is a second order different from the first order and which uses the first to n-th frequency bands in the first to n-th periods, where n is an integer greater than or equal to two. The processor switches a pattern to be used among the patterns in accordance with a communication situation.
    Type: Application
    Filed: September 8, 2020
    Publication date: April 29, 2021
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Daisuke UCHIDA, Koji AKITA, Takafumi SAKAMOTO
  • Publication number: 20210070912
    Abstract: An ultraviolet curable organopolysiloxane composition which contains: (A) a linear or branched organopolysiloxane which contains, as monovalent substituents bonded to a silicon atom at an end of the molecular chain, at least three groups represented by formula (1) and/or formula (2) in each molecule, while having the main chain composed of repeated diorganosiloxane units (in the formulae, a represents a number of 1-3; and the broken line represents a bonding hand); (B) a linear or branched organopolysiloxane which contains at least two groups represented by formula (3) in each molecule, while having the main chain composed of repeated diorganosiloxane units R1bR23-bSi??(3) (in the formula, R1 represents an alkenyl group; R2 represents a monovalent hydrocarbon group; and b represents a number of 1-3); and (C) a photoinitiator.
    Type: Application
    Filed: November 28, 2018
    Publication date: March 11, 2021
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tsuyoshi MATSUDA, Takafumi SAKAMOTO
  • Publication number: 20210054200
    Abstract: Provided is a silicone gel composition containing, as essential components: (A) an organopolysiloxane containing an alkenyl group bonded to two or more silicon atoms in one molecule, the organopolysiloxane comprising (a-1) a branched organopolysiloxane having an alkenyl group bonded to three or more silicon atoms only at an end of a molecular chain in one predetermined molecule, and (a-2) a linear organopolysiloxane having an alkenyl group bonded to two or more silicon atoms only at both ends of a molecular chain in one predetermined molecule; (B) a linear organohydrogenpolysiloxane containing hydrogen atoms bonded to two or more silicon atoms in one predetermined molecule; and (C) a platinum-based curing catalyst. Curing the silicone gel can provide a silicone gel cured product which has a degree of penetration of 40-100 as defined according to JIS K2220, has a free oil content of 15 mass % or less, has a low modulus and low stress, and does not exhibit oil bleeding over time.
    Type: Application
    Filed: February 26, 2019
    Publication date: February 25, 2021
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tsuyoshi MATSUDA, Takafumi SAKAMOTO
  • Publication number: 20200392339
    Abstract: Provided are: a room-temperature-curable organopolysiloxane composition, the degree of cure of which can be visually recognized on the basis of a change in color; a structure obtained from the composition; and a method for assessing the cured state of the composition. The room-temperature-curable organopolysiloxane composition, which changes in color with the progress of curing from the uncured state, comprises the following ingredients: (A) 100 parts by mass of one or more organopolysiloxanes represented by formula (1) HO(SiR2O)nH??(1) (wherein R is an unsubstituted or halogen-substituted C1-10 monovalent hydrocarbon group and n is an integer of 10 or larger) and/or formula (2) (wherein R and n are the same as above, X is an oxygen atom or a C2-5 alkylene group, and m is independently 0 or 1); (B) 0.
    Type: Application
    Filed: December 27, 2018
    Publication date: December 17, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira UTA, Takafumi SAKAMOTO
  • Patent number: 10858518
    Abstract: Provided is a curable organopolysiloxane composition from which highly heat-resistant cured products can be obtained, the curable organopolysiloxane composition comprising: (A) 100 parts by mass of a novel organopolysiloxane represented by formula (1) (R1 is an alkyl group or an alkoxy substituted alkyl group having 1 to 6 carbon atoms, R2 is a group selected from an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and a group in which a portion of the hydrogen atoms of those groups is substituted with a halogen atom, Ar is an arylene group having 6 carbon atoms or more, a is 1 to 1,000, b is 1 to 5,000, and n is 1 to 3, the total of n in an unsubstituted or substituted alkoxysilyl group on both ends of the molecular chain being 3 or more); and (B) 0.01 to 10 parts by mass of a curing catalyst. Also provided are electrical and electronic components, a vehicle oil seal, a building sealant, etc. which use the cured product of the composition.
    Type: Grant
    Filed: November 6, 2017
    Date of Patent: December 8, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tomoki Akiba, Tadashi Araki, Takafumi Sakamoto
  • Publication number: 20200317919
    Abstract: Through the present invention, by undergoing a step in which a straight-chain diorganopolysiloxane having silanol groups at both terminal ends of the molecular chain thereof, a hydrolyzable silane and/or a partial hydrolysis condensate thereof having a hydrolyzable group capable of detaching a lactic acid ester, and an amino-group-containing hydrolyzable organosilane and/or a partial hydrolysis condensate thereof are pre-mixed/reacted in advance and silanol groups at both terminal ends of the molecular chain of a main agent (base polymer) are blocked by specific hydrolyzable silyl groups, it is possible to manufacture a lactic-acid-ester-type room-temperature-curable organopolysiloxane composition excellent in all characteristics including curability, adhesive properties, workability, and the like that were not attainable by the conventional lactic-acid-ester-type room-temperature curable (RTV) silicone rubber composition.
    Type: Application
    Filed: September 21, 2018
    Publication date: October 8, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akitsugu FUJIWARA, Takafumi SAKAMOTO
  • Patent number: 10626132
    Abstract: The present invention provides: a novel organic titanium compound having an effect as an adhesion promoter by itself; a production method of such organic titanium compound; and a room temperature-curable resin composition containing such organic titanium compound both as a curing catalyst and as an adhesion promoter. Provided are an organic titanium compound represented by an average composition formula (I): Ti(OR1)4-a(Y3Si-A-O—CO—CH?C(O)R)a (wherein R1 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms, R represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms, A represents a divalent hydrocarbon group having 3 to 6 carbon atoms, Y represents a hydrolyzable group, and a represents a number satisfying 0<a<4); a production method of such organic titanium compound; and a room temperature-curable resin composition that contains a room temperature-curable resin.
    Type: Grant
    Filed: July 16, 2018
    Date of Patent: April 21, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Taiki Katayama, Takafumi Sakamoto
  • Patent number: 10590286
    Abstract: Provided is a room temperature-curable organopolysiloxane composition for preventing aquatic organisms from adhering to and growing on an underwater structure. The composition comprises: (A) an organopolysiloxane represented by the following general formula (1) wherein R1 represents either a hydrogen atom or a monovalent hydrocarbon group that may have a substituent group, and n represents an integer of not smaller than 1; (B) a hydrolyzable organosilicon compound and/or a partial hydrolysis condensate thereof, represented by the following general formula (2) wherein R1 represents either a hydrogen atom or a monovalent hydrocarbon group that may have a substituent group, R2 represents either an alkyl group that may have a substituent group or a cycloalkyl group, and a represents an integer of 1 to 3; (C) a curing catalyst; and (G) a bleed oil.
    Type: Grant
    Filed: April 6, 2017
    Date of Patent: March 17, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takafumi Sakamoto, Akitsugu Fujiwara, Takahiro Yamaguchi
  • Patent number: 10590322
    Abstract: Provided is a heat dissipation material comprising a mesogen/silicon compound (co)polymer having a number average molecular weight of 1,000-500,000, represented by general formula (1). (Ar is a mesogen group selected from the structure represented by the following formulas. a represents a positive number from 0.5 to 1, b represents a number from 0 to 0.5 (with the caveat that a and b each represent the ratio of each number of repeating units in molecules, and a+b=1). R1 is independently a monovalent hydrocarbon group which does not independently include a C1-8 aliphatic unsaturated bond. R2 is independently a hydrogen atom, —Si(CH3)3, —Si(CH3)2(OH), —Si(CH3)2(CH?CH) or —Si(CH3)2(CH2—CH?CH2)). This heat dissipation material has excellent thermal conductivity, and further shows good thermoplastic properties and has excellent moldability, and hence can be suitably used as a resin material for heat dissipation materials and semiconductor devices and electronic parts in particular.
    Type: Grant
    Filed: May 25, 2016
    Date of Patent: March 17, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira Uta, Masayuki Ikeno, Nobuaki Matsumoto, Kohei Masuda, Takafumi Sakamoto
  • Patent number: 10544170
    Abstract: Provided are an organosilicon compound capable of improving the storage stability of a composition (curability after long-term storage); and a method for producing the same. The organosilicon compound has, in one molecule, at least one carboxylic acid ester group represented by the following general formula (1) and at least one hydrolyzable silyl group represented by the following general formula (2): —OC(?O)CH2R1??(1) wherein R1 represents a hydrogen atom or a methyl group; —SiR23-nYn??(2) wherein R2 represents a substituted or unsubstituted monovalent hydrocarbon group having 1 to 12 carbon atoms, Y represents a hydrolyzable group, and n represents an integer satisfying 1?n?3.
    Type: Grant
    Filed: March 8, 2017
    Date of Patent: January 28, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Taiki Katayama, Isao Iwasaki, Takafumi Sakamoto
  • Patent number: 10484947
    Abstract: According to an embodiment, a wireless communication device includes a determiner, and an executor. The determiner is configured to determine whether the wireless communication device can continue operation by a stored electric power in which remaining capacity changes according to operation of the wireless communication device for a predetermined period, based on information including an operation timing associated with a cycle in which a management server. The executor is configured to execute an operation in which the data is transmitted and received between the other wireless communication device and the management server via the wireless communication device when the wireless communication device is able to continue the operation, and otherwise, cause the wireless communication device to move into intermittent operation and causes the other communication device to transmit the data to the management server not via the wireless communication device.
    Type: Grant
    Filed: February 22, 2016
    Date of Patent: November 19, 2019
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yasuyuki Nishibayashi, Yusuke Doi, Takafumi Sakamoto
  • Patent number: 10477479
    Abstract: According to one embodiment, a wireless communication device includes: a wireless communicator configured to transmit and receive a signal; and controlling circuitry configured to detect a first wireless communication device through the wireless communicator. The wireless communicator is configured to transmit a control signal preset between the wireless communication device and the first wireless communication device to activate the first wireless communication device when the controlling circuitry has not detected the first wireless communication device.
    Type: Grant
    Filed: September 14, 2017
    Date of Patent: November 12, 2019
    Assignee: KABUSHIKI KAISHA TOSHIBA
    Inventors: Tomoko Adachi, Takafumi Sakamoto
  • Publication number: 20190338126
    Abstract: Provided is a curable organopolysiloxane composition from which highly heat-resistant cured products can be obtained, the curable organopolysiloxane composition comprising: (A) 100 parts by mass of a novel organopolysiloxane represented by formula (1) (R1 is an alkyl group or an alkoxy substituted alkyl group having 1 to 6 carbon atoms, R2 is a group selected from an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 20 carbon atoms, and a group in which a portion of the hydrogen atoms of those groups is substituted with a halogen atom, Ar is an arylene group having 6 carbon atoms or more, a is 1 to 1,000, b is 1 to 5,000, and n is 1 to 3, the total of n in an unsubstituted or substituted alkoxysilyl group on both ends of the molecular chain being 3 or more); and (B) 0.01 to 10 parts by mass of a curing catalyst. Also provided are electrical and electronic components, a vehicle oil seal, a building sealant, etc. which use the cured product of the composition.
    Type: Application
    Filed: November 6, 2017
    Publication date: November 7, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tomoki AKIBA, Tadashi ARAKI, Takafumi SAKAMOTO
  • Patent number: 10442896
    Abstract: Provided is a room temperature-curable organopolysiloxane composition that is superior in fast curably, can form a cured product superior in storage stability and durability, and can further be produced in an industrially advantageous manner using more highly versatile materials. The room temperature-curable organopolysiloxane composition contains: (A) an organopolysiloxane represented by the following general formula (1) wherein R1 represents a hydrogen atom or a monovalent hydrocarbon group, and n represents an integer of not smaller than 1; (B) a hydrolyzable organic silicon compound and/or a partial hydrolysis condensate thereof represented by the following general formula (2) wherein R1 represents a hydrogen atom or a monovalent hydrocarbon group, R2 represents an alkyl group or a cycloalkyl group, and a represents an integer of 1 to 3; and (C) a curing catalyst.
    Type: Grant
    Filed: January 21, 2016
    Date of Patent: October 15, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takahiro Yamaguchi, Takafumi Sakamoto
  • Patent number: 10428183
    Abstract: Provided is a room temperature-curable resin composition containing an aluminum chelate compound. This aluminum chelate compound is an aluminum chelate compound having a ?-dicarbonyl compound represented by the following general formula (1): wherein each of R1 to R3 represents a monovalent hydrocarbon group or a halogen atom; R4 represents a hydrogen atom or a monovalent hydrocarbon group; and A is a group selected from a group represented by the following formula (2) and a group represented by —OR8: wherein each of R5 to R7 represents a monovalent hydrocarbon group or a halogen atom; and R8 represents a monovalent hydrocarbon group.
    Type: Grant
    Filed: February 5, 2019
    Date of Patent: October 1, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Taiki Katayama, Takahiro Yamaguchi, Takafumi Sakamoto
  • Publication number: 20190177542
    Abstract: This dealcoholization room-temperature curable organopolysiloxane composition contains (A) a diorganopolysiloxane having a silicon atom-bonded hydroxy group and/or a hydrolyzable silyl group at both ends of the molecular chain, and has a coefficient of viscosity of 20-1,000,000 mPa·s, (B) an organopolysiloxane which is a partial (co-)hydrolysis-condensation product of a hydrolyzable organosilane compound having one or more silicon atom-bonded alkenyl groups and 1-3 silicon atom-bonded alkoxy groups, per molecule, (C) a hydrolyzable organosilane compound having one or more phenylene backbones and two or more amino groups, per molecule, and/or a partial hydrolysis-condensation product thereof.
    Type: Application
    Filed: June 16, 2017
    Publication date: June 13, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akira UTA, Takafumi SAKAMOTO
  • Publication number: 20190169466
    Abstract: Provided are a primer composition that can adhere well to a variety of adherends and ensures a long workable time together with excellent durability, and a curtain wall unit. A primer composition comprising: (A) 100 parts by mass of an organosiloxane polymer having a three-dimensional network structure comprising R3SiO1/2 units (R independently represents a C1-6 substituted or unsubstituted monovalent hydrocarbon group) and SiO4/2 units, the molar ratio of R3SiO1/2 units to SiO4/2 units being 0.6-1.2; (B) 300-1,000 parts by mass of a mixture of organo-oxy-group-containing titanium compounds containing 75 mol % or more of an organo-oxy-group-containing titanium compound represented by formula (1) Ti(OR1)3(R2CH2COCH2COOCH2R2)1 ??(1) (R1 may be the same or different and are substituted or unsubstituted monovalent hydrocarbon groups, R2 may be the same or different and are hydrogen atoms and/or substituted or unsubstituted monovalent hydrocarbon groups); and (C) 1,000-8,000 parts by mass of a solvent.
    Type: Application
    Filed: July 18, 2017
    Publication date: June 6, 2019
    Applicants: SHIN-ETSU CHEMICAL CO., LTD., SHIN-ETSU SILICONE KOREA CO., LTD.
    Inventors: Isao IWASAKI, Takafumi SAKAMOTO, Jaryong PARK, Sungwoo KIM
  • Publication number: 20190169373
    Abstract: Provided is a room temperature-curable resin composition containing an aluminum chelate compound. This aluminum chelate compound is an aluminum chelate compound having a ?-dicarbonyl compound represented by the following general formula (1): wherein each of R1 to R3 represents a monovalent hydrocarbon group or a halogen atom; R4 represents a hydrogen atom or a monovalent hydrocarbon group; and A is a group selected from a group represented by the following formula (2) and a group represented by —OR8: wherein each of R5 to R7 represents a monovalent hydrocarbon group or a halogen atom; and R8 represents a monovalent hydrocarbon group.
    Type: Application
    Filed: February 5, 2019
    Publication date: June 6, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Taiki KATAYAMA, Takahiro YAMAGUCHI, Takafumi SAKAMOTO
  • Publication number: 20190135978
    Abstract: Provided is a novel polyoxyalkylene compound which contains, at a molecular chain terminal, at least one reactive silicon-containing group represented by formula (1) per molecule and which has a main chain that is a polyoxyalkylene polymer. Also provided are: a process for producing the novel polyoxyalkylene compound; a room-temperature-curable composition which includes the compound as a main component and can contain any of various crosslinking agents; a sealing material; and an article. (In formula (1), R1 and R2 are each a monovalent hydrocarbon group, a hydrogen atom, or a triorganosiloxy group; n is 2 or larger; m is 1 or larger; and the broken line is a linking bond.
    Type: Application
    Filed: February 28, 2017
    Publication date: May 9, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Takahiro YAMAGUCHI, Masayuki IKENO, Isao IWASAKI, Takafumi SAKAMOTO
  • Publication number: 20190127593
    Abstract: Provided is a room temperature-curable organopolysiloxane composition for preventing aquatic organisms from adhering to and growing on an underwater structure. The composition comprises: (A) an organopolysiloxane represented by the following general formula (1) wherein R1 represents either a hydrogen atom or a monovalent hydrocarbon group that may have a substituent group, and n represents an integer of not smaller than 1; (B) a hydrolyzable organosilicon compound and/or a partial hydrolysis condensate thereof, represented by the following general formula (2) wherein R1 represents either a hydrogen atom or a monovalent hydrocarbon group that may have a substituent group, R2 represents either an alkyl group that may have a substituent group or a cycloalkyl group, and a represents an integer of 1 to 3; (C) a curing catalyst; and (G) a bleed oil.
    Type: Application
    Filed: April 6, 2017
    Publication date: May 2, 2019
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Takafumi SAKAMOTO, Akitsugu FUJIWARA, Takahiro YAMAGUCHI