Patents by Inventor Munenao Hirokami

Munenao Hirokami 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: 20200032103
    Abstract: The present invention pertains to a room-temperature-curable organopolysiloxane composition containing (A) an organopolysiloxane having the hydrolyzable silyl-group-containing monovalent organic group represented by formula (1) (R1 represents a substituted or unsubstituted C1-10 alkyl group or a substituted or unsubstituted C6-10 aryl group, R2 represents a substituted or unsubstituted C1-10 alkyl group or a substituted or unsubstituted C6-10 aryl group, and R3 represents a substituted or unsubstituted C1-20 alkyl group or a hydrogen atom; M is an integer from 1 to 3, and n is an integer of 2 or more; and the broken line represents atomic bonding), (B) a hydrolyzable organosilane compound and/or a partially hydrolyzed condensate thereof, (C) a curing catalyst, and (F) a bleed oil.
    Type: Application
    Filed: March 20, 2018
    Publication date: January 30, 2020
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Akitsugu FUJIWARA, Tetsuro YAMADA, Munenao HIROKAMI
  • Patent number: 10544281
    Abstract: Provided is an addition-curable silicone rubber composition containing (A) an alkenyl group-containing organopolysiloxane having alkenyl groups bonded to at least two silicon atoms per molecule, (B) an organohydrogenpolysiloxane containing hydrogen atoms bonded to at least two silicon atoms per molecule, (C) a platinum catalyst, and (D) a benzotriazole derivative represented by general formula (I) (in the formula, R1 is a hydrogen atom or monovalent hydrocarbon group, R2 is a monovalent organic group) that makes it possible to provide silicone rubber that can lower the compression set without harming the curing rate and suppress discoloration after a heat resistance test.
    Type: Grant
    Filed: June 7, 2016
    Date of Patent: January 28, 2020
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Nobu Kato, Munenao Hirokami
  • Publication number: 20190375769
    Abstract: Provided is an organosilicon compound characterized by containing at least one group represented by structural formula (1) in one molecule and having a main chain comprising a silicon-containing organic group. This organosilicon compound exhibits satisfactorily fast curability, and excellent yellowing resistance, heat resistance, storage stability, and safety. (In the formula, each R1 independently represents an unsubstituted or substituted C1-10 alkyl group, or an unsubstituted or substituted C6-10 aryl group, each R2 independently represents an unsubstituted or substituted C1-10 alkyl group, or an unsubstituted or substituted C6-10 aryl group, and each R3 independently represents a hydrogen atom or an unsubstituted or substituted C1-10 alkyl group. m is a number from 1-3, and n is an integer of 2 or greater. A dashed line represents a bond.
    Type: Application
    Filed: May 16, 2017
    Publication date: December 12, 2019
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Tetsuro YAMADA, Munenao HIROKAMI, Taiki KATAYAMA
  • Patent number: 10479880
    Abstract: Provided are a rubber composition for tires which achieves both abrasion resistance and processability while maintaining fuel economy, and a pneumatic tire including the rubber composition. A rubber composition for tires, containing an organosilicon compound represented by the average compositional formula (I) below having a ratio of the number of sulfur atoms to the number of silicon atoms of 1.0 to 1.5, wherein x represents the average number of sulfur atoms; m represents an integer of 6 to 12; and R1 to R6 are the same or different and each represent a C1-C6 alkyl or alkoxy group, at least one of R1 to R3 and at least one of R4 to R6 are the alkoxy groups, and two or more of the alkyl or alkoxy groups for R1 to R6 may be joined to form a ring.
    Type: Grant
    Filed: September 21, 2017
    Date of Patent: November 19, 2019
    Assignees: SUMITOMO RUBBER INDUSTRIES, LTD., SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Ryuichi Tokimune, Tsuyoshi Tsuchida, Ryota Kitago, Soh Ishino, Hiroyuki Kishimoto, Munenao Hirokami, Tetsuro Yamada
  • Patent number: 10442822
    Abstract: An organosilicon compound represented by general formula (1). The present invention is able to provide an organosilicon compound which has excellent adhesion during processing and high bonding strength, while exhibiting antirust corrosion resistance at high levels, and which is useful as a metal surface treatment agent. (In the formula, R represents a hydrolyzable group; R? represents an alkyl group; A represents an alkylene group; R1 and R2, R2 and R3, or R3 and R4 among the R1, R2, R3 and R4 moieties may combine together to form an aliphatic or aromatic ring skeleton, and in cases where a ring skeleton is not formed, each one of the R1, R2, R3 and R4 moieties independently represents a hydrogen atom or an alkyl group; and m represents a number of 1-3.
    Type: Grant
    Filed: October 13, 2015
    Date of Patent: October 15, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Munenao Hirokami
  • Publication number: 20190309206
    Abstract: This thermally-conductive silicone composition comprises: (A) an organopolysiloxane having two or more alkenyl groups per molecule, and having a kinetic viscosity of 10-100,000 mm2/s at 25° C., (B) a hydrolyzable methyl polysiloxane which is represented by formula (1) (R1 represents an alkyl group, and a is 5-100) and of which one end is trifunctional, (C) a thermally-conductive filler having a thermal conductivity of 10 W/m·° C. or more, (D) an organohydrogen polysiloxane having two or more Si—H groups per molecule, (E) a catalyst selected from the group consisting of platinum and platinum compounds, and (F) a benzotriazole derivative represented by formula (2) (R2 represents H or a monovalent hydrocarbon group, and R3 represents a monovalent organic group). The composition can inhibit the decrease of the curing speed.
    Type: Application
    Filed: October 13, 2017
    Publication date: October 10, 2019
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Kenichi TSUJI, Nobu KATO, Munenao HIROKAMI
  • Publication number: 20190309184
    Abstract: An epoxy resin composition comprising an epoxy resin, a curing agent, (A) a carboxyl-containing benzotriazole derivative, and (B) an alkoxysilyl-containing aminoalkylsilane derivative is suited for encapsulating semiconductor devices. The sum of (A)+(B) is 0.5-5.0 pbw per 100 pbw of the sum of the epoxy resin and the curing agent, and a molar ratio (A)/(B) is 0.5-1.5. The composition is free of sulfur and highly adhesive to metal substrates.
    Type: Application
    Filed: April 8, 2019
    Publication date: October 10, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Hiroki Oishi, Shoichi Osada, Ryuhei Yokota, Munenao Hirokami
  • Patent number: 10323048
    Abstract: An organosilicon compound represented by formula (1), which has, per alkoxysilyl group, a plurality of epoxy groups each capable of reacting with an organic resin moiety to form a bond and which hence is useful as a primer, a resin modifier, etc. (In the formula, the R1 moieties each independently represent an (un)substituted C1-10 alkyl group, etc.; the R2 moieties each independently represent an (un)substituted C1-10 alkyl group, etc.; the R3 moieties each independently represent a hydrogen atom or a methyl group; A1 represents a single bond, O, S, NH, or a divalent linking group containing a heteroatom; A2 represents a single bond or an (un)substituted C1-20 divalent hydrocarbon group optionally containing a heteroatom; a and c are each independently a number greater than 0; b, d, e, and f are each independently a number of 0 or greater; and m is an integer of 1 to 3. The repeating units may have been linked in any order.
    Type: Grant
    Filed: January 30, 2017
    Date of Patent: June 18, 2019
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuro Yamada, Munenao Hirokami
  • Publication number: 20190031690
    Abstract: An organosilicon compound represented by formula (1), which has, per alkoxysilyl group, a plurality of epoxy groups each capable of reacting with an organic resin moiety to form a bond and which hence is useful as a primer, a resin modifier, etc. (In the formula, the R1 moieties each independently represent an (un)substituted C1-10 alkyl group, etc.; the R2 moieties each independently represent an (un)substituted C1-10 alkyl group, etc.; the R3 moieties each independently represent a hydrogen atom or a methyl group; A1 represents a single bond, O, S, NH, or a divalent linking group containing a heteroatom; A2 represents a single bond or an (un)substituted C1-20 divalent hydrocarbon group optionally containing a heteroatom; a and c are each independently a number greater than 0; b, d, e, and f are each independently a number of 0 or greater; and m is an integer of 1 to 3. The repeating units may have been linked in any order.
    Type: Application
    Filed: January 30, 2017
    Publication date: January 31, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Tetsuro YAMADA, Munenao HIROKAMI
  • Publication number: 20190016876
    Abstract: An organic silicon compound represented by formula (1) makes it possible to significantly lower the hysteresis loss of a cured product when added to a rubber composition and also imparts a rubber composition with which it is possible to realize a desired low-fuel-consumption tire. (In the formula, R1 independently represent a C1-10 alkyl group or C6-10 aryl group, R2 independently represent a C1-10 alkyl group or C6-10 aryl group, f represents a number of 0 or higher, e and g independently represent a number greater than 0, and m represents an integer of 1-3. However, the order of each of the repeating units is arbitrary.
    Type: Application
    Filed: August 18, 2016
    Publication date: January 17, 2019
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Munenao HIROKAMI
  • Publication number: 20180361721
    Abstract: A laminate which comprises a base, a primer coat layer that is formed on at least one surface of the base, and a top coat layer that is formed on the primer coat layer, and wherein: the primer coat layer is formed from a primer composition that contains an acid-modified polyolefin; the top coat layer is formed from a cured product of a top coat composition that contains a condensation-curable silicone composition; and one or both of the primer composition and the top coat composition contain an amino group-containing silane coupling agent. This laminate exhibits good adhesion even in cases where a base that is formed from a slightly adhesive material is used therefor.
    Type: Application
    Filed: November 2, 2016
    Publication date: December 20, 2018
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Munenao HIROKAMI
  • Patent number: 10047229
    Abstract: A powder coating composition comprising a specific organosilicon compound forms a coating which exhibits satisfactory water-loading resistant performance.
    Type: Grant
    Filed: July 5, 2016
    Date of Patent: August 14, 2018
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Munenao Hirokami
  • Publication number: 20180134871
    Abstract: Provided is an addition-curable silicone rubber composition containing (A) an alkenyl group-containing organopolysiloxane having alkenyl groups bonded to at least two silicon atoms per molecule, (B) an organohydrogenpolysiloxane containing hydrogen atoms bonded to at least two silicon atoms per molecule, (C) a platinum catalyst, and (D) a benzotriazole derivative represented by general formula (I) (in the formula, R1 is a hydrogen atom or monovalent hydrocarbon group, R2 is a monovalent organic group) that makes it possible to provide silicone rubber that can lower the compression set without harming the curing rate and suppress discoloration after a heat resistance test.
    Type: Application
    Filed: June 7, 2016
    Publication date: May 17, 2018
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Nobu KATO, Munenao HIROKAMI
  • Publication number: 20180112065
    Abstract: Provided are a rubber composition for tires which achieves both abrasion resistance and processability while maintaining fuel economy, and a pneumatic tire including the rubber composition. A rubber composition for tires, containing an organosilicon compound represented by the average compositional formula (I) below having a ratio of the number of sulfur atoms to the number of silicon atoms of 1.0 to 1.5, wherein x represents the average number of sulfur atoms; m represents an integer of 6 to 12; and R1 to R6 are the same or different and each represent a C1-C6 alkyl or alkoxy group, at least one of R1 to R3 and at least one of R4 to R6 are the alkoxy groups, and two or more of the alkyl or alkoxy groups for R1 to R6 may be joined to form a ring.
    Type: Application
    Filed: September 21, 2017
    Publication date: April 26, 2018
    Applicants: SUMITOMO RUBBER INDUSTRIES, LTD., SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Ryuichi TOKIMUNE, Tsuyoshi TSUCHIDA, Ryota KITAGO, Soh ISHINO, Hiroyuki KISHIMOTO, Munenao HIROKAMI, Tetsuro YAMADA
  • Publication number: 20180066085
    Abstract: A silane-modified polymer having a polyisoprene skeleton and a hydrolyzable silyl group is useful as a rubber compounding ingredient. When added to a rubber composition, it is effective for improving the wet grip and substantially reducing the hysteresis loss of the cured rubber composition. Low fuel consumption tires may be manufactured from the rubber composition.
    Type: Application
    Filed: August 30, 2017
    Publication date: March 8, 2018
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Munenao Hirokami
  • Publication number: 20180066093
    Abstract: A silane-modified copolymer comprising constituent units of butadiene, constituent units having a hydrolyzable silyl group, and constituent units having acid anhydride functionality is low volatile because of its molecular weight. It may be synthesized from relatively inexpensive reactants.
    Type: Application
    Filed: August 30, 2017
    Publication date: March 8, 2018
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventor: Munenao HIROKAMI
  • Publication number: 20180022876
    Abstract: Provided are: an organopolysiloxane capable of achieving intended low fuel consumption properties and significantly reducing hysteresis loss in the cured product of a rubber composition during tire production; a rubber compounding agent comprising said organopolysiloxane; a rubber composition obtained by blending said rubber compounding agent; and a tire formed using said rubber composition. The organopolysiloxane, which is represented by average compositional formula (1), is characterized in: containing an organic group with a sulfide group; and the sulfide equivalents being 1,000 g/mol or less. (A)a(B)b(C)c(R1)dSiO(4-2a-b-c-d)/2 ??(1) (In the formula, A is a sulfide group-containing divalent organic group, B is a C5 to C10 monovalent hydrocarbon group, C is a hydrolyzable group and/or a hydroxyl group, R1 is a C1 to C4 monovalent hydrocarbon group, and for a, b, c and d, 0<2a<1, 0<b<1, 0<c<3, 0?d<2, and 0<2a+b+c+d<4.
    Type: Application
    Filed: October 22, 2015
    Publication date: January 25, 2018
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventors: Munenao HIROKAMI, Kazuhiro TSUCHIDA
  • Publication number: 20180016475
    Abstract: Provided is a room temperature-curable organopolysiloxane composition capable of yielding, through curing, a silicone rubber cured product exhibiting a favorable adhesiveness and water-immersion adhesiveness to general purpose resins and metals. The composition contains (A) a diorganopolysiloxane having silicon atom-bonded hydroxyl groups and/or hydrolyzable groups at both terminals of a molecular chain, and exhibiting a viscosity of 20 to 1,000,000 mPa·s at 25° C.
    Type: Application
    Filed: November 4, 2015
    Publication date: January 18, 2018
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Akira UTA, Takafumi SAKAMOTO, Munenao HIROKAMI
  • Patent number: 9828297
    Abstract: An anticorrosion agent comprising (A) an organosilicon compound of formula (1) R1—Si—(OR2)3??(1) and (B) an amine compound of formula (2) and/or an amine compound of formula (3) is applied to steel-reinforced concrete to prevent corrosion of the steel reinforcement.
    Type: Grant
    Filed: March 15, 2016
    Date of Patent: November 28, 2017
    Assignee: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Munenao Hirokami
  • Publication number: 20170226136
    Abstract: An organosilicon compound represented by general formula (1). The present invention is able to provide an organosilicon compound which has excellent adhesion during processing and high bonding strength, while exhibiting antirust corrosion resistance at high levels, and which is useful as a metal surface treatment agent. (In the formula, R represents a hydrolyzable group; R? represents an alkyl group; A represents an alkylene group; R1 and R2, R2 and R3, or R3 and R4 among the R1, R2, R3 and R4 moieties may combine together to form an aliphatic or aromatic ring skeleton, and in cases where a ring skeleton is not formed, each one of the R1, R2, R3 and R4 moieties independently represents a hydrogen atom or an alkyl group; and m represents a number of 1-3.
    Type: Application
    Filed: October 13, 2015
    Publication date: August 10, 2017
    Applicant: SHIN-ETSU CHEMICAL CO., LTD.
    Inventor: Munenao HIROKAMI