Patents by Inventor Yoichi Tonomura

Yoichi Tonomura 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).

  • Silyl (meth)acrylates having bulky substituent group and preparation thereof
    Publication number: 20020128503
    Abstract: Silyl (meth)acrylate compounds each having attached to a silicon atom one very bulky tertiary hydrocarbon group and two branched hydrocarbon groups each having a hydrocarbon group at &agr;- or &bgr;-position or two cyclic hydrocarbon groups are very stable to hydrolysis and are useful raw materials from which hydrolyzable, self-erodible polymers for ship bottom paints are prepared.
    Type: Application
    Filed: March 5, 2002
    Publication date: September 12, 2002
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoichi Tonomura, Tohru Kubota, Yasufumi Kubota
  • Preparation of bissilylnorbornane compounds
    Patent number: 6426427
    Abstract: A bissilylnorbornane compound is prepared by reacting 2,5-norbornadiene with a hydrogenchlorosilane in the presence of a mixture of a palladium compound and a phosphite or a palladium complex having a phosphate ligand as a catalyst. The bissilylnorbornane compound can be produced in high yields while suppressing formation of by-product nortricyclene.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: July 30, 2002
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoichi Tonomura, Tohru Kubota, Mikio Endo
  • Thexylchlorosilanes and making process
    Publication number: 20020055647
    Abstract: Chlorosilane compounds having a thexyl group which is a bulky substituent group are novel. The compounds are useful silylating agents because stable silylated products are obtained due to the bulky substituent group.
    Type: Application
    Filed: November 5, 2001
    Publication date: May 9, 2002
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoichi Tonomura, Tohru Kubota, Yasufumi Kubota
  • PREPARATION OF BISSILYLNORBORNANE COMPOUNDS
    Publication number: 20020035286
    Abstract: A bissilylnorbornane compound is prepared by reacting 2,5-norbornadiene with a hydrogenchlorosilane in the presence of a mixture of a palladium compound and a phosphite or a palladium complex having a phosphite ligand as a catalyst. The bissilylnorbornane compound can be produced in high yields while suppressing formation of by-product nortricyclene.
    Type: Application
    Filed: August 24, 2001
    Publication date: March 21, 2002
    Applicant: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoichi Tonomura, Tohru Kubota, Mikio Endo
  • Preparation of halopropyldimethylchlorosilanes
    Patent number: 6359161
    Abstract: A halopropyldimethylchlorosilane is prepared by reacting dimethylchlorosilane with an allyl halide in the presence of an iridium catalyst. The reaction is effected in the presence of an internal olefin compound, typically 1,5-cyclooctadiene. The internal olefin compound suppresses deactivation of the iridium catalyst during reaction. Using a smaller amount of the iridium catalyst, the process produces the halopropyldimethylchlorosilane in high yields.
    Type: Grant
    Filed: May 11, 2001
    Date of Patent: March 19, 2002
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoichi Tonomura, Tohru Kubota, Mikio Endo
  • Preparation of halopropyldimethylchlorosilanes
    Publication number: 20010053861
    Abstract: A halopropyldimethylchlorosilane is prepared by reacting dimethylchlorosilane with an allyl halide in the presence of an iridium catalyst. The reaction is effected in the presence of an internal olefin compound, typically 1,5-cyclooctadiene. The internal olefin compound suppresses deactivation of the iridium catalyst during reaction. Using a smaller amount of the iridium catalyst, the process produces the halopropyldimethylchlorosilane in high yields.
    Type: Application
    Filed: May 11, 2001
    Publication date: December 20, 2001
    Inventors: Yoichi Tonomura, Tohru Kubota, Mikio Endo
  • Hydrosilylation of 4-vinyl-1-cyclohexene
    Patent number: 6245925
    Abstract: By reacting 4-vinyl-1-cyclohexene with a hydrogenchlorosilane compound in the presence of a platinum catalyst to give a reaction solution containing a monosilyl compound, removing the residual 4-vinyl-1-cyclohexene and isomers thereof from the reaction solution, and reacting the monosilyl compound again with the hydrogenchlorosilane compound, an organic silicon compound in which the two double bonds in 4-vinyl-1-cyclohexene have been hydrosilylated is produced in high yields.
    Type: Grant
    Filed: July 27, 2000
    Date of Patent: June 12, 2001
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoichi Tonomura, Tohru Kubota, Mikio Endo