Patents by Inventor Toshio Saruyama

Toshio Saruyama 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).

  • Patent number: 5789334
    Abstract: A microparticle catalyst for hydrosilylation reactions which contains microparticles of an average particle diameter of 0.1 to 20 .mu.m made of a metallic catalyst for hydrosilylation reactions; a disiloxane having the general formula (R.sup.1 R.sup.2 ArSi).sub.2 O, wherein, R.sup.1 is an alkenyl group, R.sup.2 is a monovalent hydrocarbon group and Ar is an aryl group; and a resin having a glass transition temperature of 40.degree. to 200.degree. C. and thermosetting silicone composition containing the microparticle catalyst.
    Type: Grant
    Filed: August 30, 1996
    Date of Patent: August 4, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Junji Nakanishi, Toshio Saruyama, Atsushi Togashi
  • Patent number: 5780543
    Abstract: One-package room-temperature-curable silicone elastomer compositions that do not slump prior to their cure, that provide a suitable processing or working time, that do not crack or fissure during their cure even when deformed by an external force, and that do not yellow during storage or after curing are prepared by mixing (A) the reaction mixture of(a) hydroxyl-terminated diorganopolysiloxane and(b) alkyl-containing oximosilaneor optionally (b) alonewith (B) the reaction mixture of(a) hydroxy-terminated diorganopolysiloxane and(c) vinyl-functional oximosilaneand by thereafter mixing in(C) inorganic filler.
    Type: Grant
    Filed: March 27, 1996
    Date of Patent: July 14, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroshi Adachi, Toshio Saruyama
  • Patent number: 5639823
    Abstract: A non-yellowing one-package, RTV, silicone elastomer composition is prepared and has properties such that prior to its cure, it is highly workable and that during its cure does not crack or fissure even when deformed by external force. These one-package, room-temperature-vulcanizable, silicone elastomer compositions comprise (A) diorganopolysiloxane endblocked by oxime group-containing organic radicals where at least 50 mole of the end groups contain alkenyl radicals, (B) oxime group-containing organosilane where no more than 50 mole % of the silane molecules contain alkenyl, and (C) inorganic filler.
    Type: Grant
    Filed: September 28, 1995
    Date of Patent: June 17, 1997
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroshi Adachi, Toshio Saruyama
  • Patent number: 5633302
    Abstract: A method for the preparation of a non-yellowing one-package room-temperature-curable silicone elastomer composition that prior to its cure is highly workable and that during its cure does not crack or fissure even when deformed by an outside force. The method comprises as step one mixing of silanol-containing polydiorganosiloxane and inorganic filler; as step two admixing vinyltrioximosilane into the mixture of step one; and as step three admixing an alkyltrioximosilane into the mixture of step two.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: May 27, 1997
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroshi Adachi, Toshio Saruyama
  • Patent number: 5620787
    Abstract: The present invention relates to an organopolysiloxane emulsion composition comprising a hydroxy or alkoxy-endblocked diorganopolysiloxane, an alkoxy-group containing organosilicon compound, surfactant, and water. The compositions of this invention are characterized by a lack of offensive odor, high productivity and good storage stability. The organopolysiloxane emulsions of this invention are useful as fiber treatment agents. The fibers treated with the organopolysiloxane emulsion of this invention exhibit good feel.
    Type: Grant
    Filed: January 29, 1996
    Date of Patent: April 15, 1997
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Isao Ona, Masaru Ozaki, Toshio Saruyama, Masahiko Suzuki
  • Patent number: 5521238
    Abstract: The present invention relates to an organopolysiloxane emulsion composition comprising a hydroxy or alkoxy-endblocked diorganopolysiloxane, an alkoxy-group containing organosilicon compound, surfactant, and water. The compositions of this invention are characterized by a lack of offensive odor, high productivity and good storage stability. The organopolysiloxane emulsions of this invention are useful as fiber treatment agents. The fibers treated with the organopolysiloxane emulsion of this invention exhibit good feel.
    Type: Grant
    Filed: December 22, 1994
    Date of Patent: May 28, 1996
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Isao Ona, Masaru Ozaki, Toshio Saruyama, Masahiko Suzuki
  • Patent number: 5516858
    Abstract: There is disclosed a curable resin composition that has an excellent fluidity prior to curing and that cures to form a molding resin that is flexible, highly moisture resistant, and strongly resistant to heat shock, said composition comprising(A) 100 weight parts of a curable resin; and(B) 0.1 to 500 weight parts of an epoxy group-containing silicone resin that has the general formula(R.sup.1 SiO.sub.3/2).sub.a (R.sup.2 R.sup.3 SiO.sub.2/2).sub.b (SiO.sub.4/2).sub.cwherein R.sup.1, R.sup.2 and R.sup.3 each represents a group selected from the group consisting of an epoxy group-containing organic group and a monovalent hydrocarbon group with the proviso that said epoxy group-containing organic groups comprise 0.1 to 40 mole percent of the total silicon-bonded organic groups in said silicone resin (B), a is a positive number, b is zero or a positive number, c is zero or a positive number, b/a has a value of zero to 10, c/(a+b+c) has a value of zero to 0.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: May 14, 1996
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Yoshitsugu Morita, Junji Nakanishi, Ken Tanaka, Toshio Saruyama
  • Patent number: 5514765
    Abstract: A room temperature-curing silicone elastomer composition which has excellent workability before curing and forms a silicone elastomer after curing which exhibits low modulus and high elongation. This composition contains a hydroxyl-capped polydiorganosiloxane, a siloxane chain extender of the formulaR.sup.1 (R.sup.2.sub.n R.sup.3.sub.(3-n) SiO)Si(OR.sup.4).sub.2in which R.sup.1, R.sup.2, and R.sup.3 are aliphatic monovalent hydrocarbon groups, R.sup.4 is a hydrocarbon group having from 1 to 8 carbon atoms per group, and n is 0 or 1, an alkoxysilane crosslinker, and a curing catalyst.
    Type: Grant
    Filed: July 19, 1995
    Date of Patent: May 7, 1996
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Seiji Hori, Hidekatsu Hatanaka, Toshio Saruyama
  • Patent number: 5470934
    Abstract: Vinyl- and alkoxy-functional organosilicon compounds with the general formula ##STR1## in which R denotes C.sub.1 and C.sub.4 alkyl and a is 1, 2, or 3, b is 0 or 1, and a+b is 2 or 3 are made by an exchange reaction between sym-divinyltetramethyldisiloxane and vinyltrialkoxysilane or tetraalkoxysilane. These novel vinyl- and alkoxy-functional organosilicon compounds exhibit a high condensation reactivity with the silanol group.
    Type: Grant
    Filed: September 15, 1994
    Date of Patent: November 28, 1995
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Toshio Saruyama, Masahiko Suzuki
  • Patent number: 5300607
    Abstract: Silicone resins containing monorganosiloxane and diorganosiloxane units and exhibiting reproducible values of molecular weight and dispersity are prepared by condensing a mixture of hydrolyzed silanes, adjusting the solids content of the condensed resin and then subjecting the resultant product to a re-equilibration reaction in the presence of an alkali metal compound.
    Type: Grant
    Filed: September 11, 1992
    Date of Patent: April 5, 1994
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Junji Nakanishi, Toshio Saruyama, Atsushi Togashi
  • Patent number: 5300610
    Abstract: The invention provides a method for manufacturing an alkoxy radical-containing silicone resin wherein the molecular weight, viscosity, thermal transition point, and alkoxy radical content can be easily controlled. The method of the instant invention comprises combining under anhydrous conditions, (A) an alkoxysilane represented by the formula R.sup.4.sub.a Si(OR.sup.5).sub.4-a or its partial hydrolysis product wherein R.sup.4 is selected consisting of a monovalent hydrocarbon radical and a monovalent halogenated hydrocarbon radical, R.sup.5 is selected from the group consisting of an alkyl radical containing 1 to 6 carbon atoms, and a has a value of 0 to 3; and (B) an organopolysiloxane or a mixture of organopolysiloxanes selected from the group consisting of organopolysiloxanes that are made of siloxane units selected from the group consisting of R.sup.1 SiO3.sub./2 and R.sup.2 R.sup.3 SiO and mixtures thereof wherein R.sup.1, R.sup.2 and R.sup.
    Type: Grant
    Filed: February 5, 1993
    Date of Patent: April 5, 1994
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Junji Nakanishi, Toshio Saruyama
  • Patent number: 5300612
    Abstract: A room-temperature-curable silicone elastomer composition that is highly workable prior to its cure and that cures to give a silicone elastomer having a desirable stiffness is made from a silanol-terminated polydiorganosiloxane, a dialkoxysiloxane of the formula ##STR1## where R.sup.1 represents monovalent hydrocarbon groups and R.sup.2 represents monovalent hydrocarbon groups having 1 to 8 carbon atoms, a tri- or tetra-alkoxysilane, and a curing catalyst.
    Type: Grant
    Filed: June 17, 1993
    Date of Patent: April 5, 1994
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventor: Toshio Saruyama
  • Patent number: 5204384
    Abstract: The curable organosiloxane compositions of the present invention contain a hydrosilylation catalyst that is microencapsulated within a layer of silicone resin or polysilane resin. These compositions are characterized by the presence of carbon black or a member from a specified group of metal compounds that prevents coagulation in cured materials of the resin portion of the microencapsulated catalyst.
    Type: Grant
    Filed: January 23, 1991
    Date of Patent: April 20, 1993
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Takao Matsushita, Toshio Saruyama
  • Patent number: 5153160
    Abstract: Microparticles of a hydrosilylation catalyst encapsulated in a thermoplastic resin are prepared by forming a solution containing the hydrosilylation catalyst and a thermoplastic resin with a glass-transition temperature or softening point of 40.degree. to 200.degree. C. dissolved in a solvent, and then spraying this solution as droplets into a hot gas current in order to volatilize the solvent while solidifying said thermoplastic resin during entrainment of the droplets in the gas current.
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: October 6, 1992
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventors: Toshio Saruyama, Teruyuki Nakagawa, Toyohiko Yamadera, Atsushi Togashi
  • Patent number: 5098980
    Abstract: A platinum catalyst composition having improved thermal stability, and all of the utilities of platinum catalyst compositions of the art, is provided by mixing certain organosiloxanes which contain aryl and alkenyl groups, such as 1,3-divinyl-1,3-diphenyldimethyldisiloxane, in a quantity of at least 2 moles, with a platinum complex having as a ligand an organosiloxane which contains alkyl and alkenyl groups, such as 1,3-divinyltetramethyldisiloxane (or a mixture of said platinum complex and said organosiloxane), in a quantity of 1 mole of platinum atoms. In a preferred embodiment the mixture is distilled in vacuo to remove part or all of the organosiloxane which contains alkyl and alkenyl groups, and most preferably to remove at least a portion of the complexed organosiloxane which contains alkyl and alkenyl groups.
    Type: Grant
    Filed: May 3, 1991
    Date of Patent: March 24, 1992
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventors: Toshio Saruyama, Hideko Takeda, Atshushi Togashi
  • Patent number: 5057476
    Abstract: A platinum catalyst composition having improved thermal stability, and all of the utilities of platinum catalyst compositions of trhe art, is provided by mixing certain organosiloxanes which contain aryl and alkenyl groups, such as 1,3-divinyl-1,3-diphenyldimethyldisiloxane, in a quantity of at least 2 moles, with a platinum complex having as a ligand an organosiloxane which contains alkyl and alkenyl groups, such as 1,3-divinyltetramethyldisiloxane (or a mixture of said platinum complex and said organosiloxane), in a quantity of 1 mole of platinum atoms. In a preferred embodiment the mixture is distilled in vacuo to remove part or all of the organosiloxane which contains alkyl and alkenyl groups, and most preferably to remove at least a portion of the complexed organosiloxane which contains alkyl and alkenyl groups.
    Type: Grant
    Filed: August 22, 1990
    Date of Patent: October 15, 1991
    Assignee: Dow Corning Toray Silicone Company, Ltd.
    Inventors: Toshio Saruyama, Hideko Takeda, Atshushi Togashi
  • Patent number: 5017654
    Abstract: The combination of a microencapsulated hydrosilylation catalyst selected from the group consisting of metals from the platinum group of the periodic table and compounds of these metals and a known inhibitor for this type of catalyst impart excellent storage stability to organosiloxane compositions that cure by a hydrosilation reaction while enabling these compositions to rapidly cure at temperatures above the softening temperature of the thermoplastic resin used to encapsulate the hydrosilylation catalyst. The curing rate of the composition is faster relative to compositions containing the microencapsulated catalyst without the catalyst inhibitor.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: May 21, 1991
    Assignee: Toray Silicone Company, Limited
    Inventors: Atsushi Togashi, Toshio Saruyama
  • Patent number: 5015716
    Abstract: This invention provides particulate catalyst compositions comprising a platinum-containing hydrosilation reaction catalyst and a polydiorganosilane exhibiting a softening point of from 50.degree. to 200.degree. C. The average particle size of the particulate does not exceed 100 micrometers, and the surface layer of the particulate is substantially free of said catalyst. Curable organopolysiloxane compositions containing the present catalyst compositions exhibit excellent storage stability.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: May 14, 1991
    Assignee: Toray Silicone Company, Limited
    Inventors: Atsushi Togashi, Toshio Saruyama
  • Patent number: 4847228
    Abstract: The storage stability of catalyst compositions comprising a platinum-alkenylsiloxane complex, an organopolysiloxane, and a microparticulate hydrophilic silica is substantially increased when the pK.sub.a of a dispersion containing specified amounts of said complex and said silica in a non-polar solvent is at least 2.0. The silica is treated with an alkaline material to achieve said pH.sub.a value.
    Type: Grant
    Filed: October 12, 1988
    Date of Patent: July 11, 1989
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Toshio Saruyama
  • Patent number: 4806592
    Abstract: The liquid silicone rubber compositions of this invention comprise an organopolysiloxane having silicon-bonded alkenyl radicals, a reinforcing silica filler and, as the curing catalyst, a platinum-alkenylsiloxane complex wherein the pK.sub.a value of the catalyst when measured under a specifed set of conditions is from 2.0 to 9.0, inclusive. The compositions have an excellent storage stability as one part of a two-package liquid silicone rubber composition that cures by a platinum catalyzed hydrosilation reaction.
    Type: Grant
    Filed: August 31, 1987
    Date of Patent: February 21, 1989
    Assignee: Toray Silicone Co., Ltd.
    Inventor: Toshio Saruyama