Patents Assigned to Dow Corning Toray Silicone Co., Ltd.
  • Patent number: 5902042
    Abstract: A continuous mixer for liquids comprises a casing having a conical interior surface and a discharge outlet at the apex of the cone formed by the conical interior surface, a rotor that rotates at its center on the axis of the cone and has a conical exterior surface whose vertical angle is approximately equal to the vertical angle of the conical interior surface, a pressure-transport device that has one or more feed lines which communicate with a gap between the interior surface of the casing and the exterior surface of the rotor a position removed from the discharge outlet and that delivers one or more liquid inputs under pressure through the feed lines, and a gap-adjustment device capable of axially adjusting the rotor within the casing to adjust the gap. The internal pressure and temperature or the mixer can be controlled or adjusted while the rotor is rotating by changing the gap width along the axial direction.
    Type: Grant
    Filed: July 14, 1997
    Date of Patent: May 11, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Toru Imaizumi, Koichi Ishida, Tsugio Nozoe
  • Patent number: 5902870
    Abstract: A method for making (meth)acryloxy-functional organosilicon compounds comprising conducting an addition reaction between(A) an acrylate ester or methacrylate ester of an aliphatically unsaturated alcohol and(B) a SiH-functional organosilicon compound in the presence of(C) a hydrosilylation-reaction catalyst and(D) a compound described by general formula ##STR1## where A is a (N,N-dialkylamino)alkyl and R is a monovalent hydrocarbon group or a hydrogen atom. The presence of component (D) in the present method inhibits the generation of reaction by-products and prevents gelation during the addition reaction and very efficiently produces high-purity (meth)acryloxy-functional organosilicon compounds in high yields.
    Type: Grant
    Filed: November 24, 1997
    Date of Patent: May 11, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Kazuhiro Isoyama, Yokichi Yamamoto
  • Patent number: 5891969
    Abstract: A curable epoxy resin composition comprising (A) a curable epoxy resin and (B) an organopolysiloxane prepared by equilibrium polymerization and having the average unit formula(R.sup.1 SiO.sub.3/2).sub.a (R.sup.2.sub.2 SiO.sub.2/2).sub.b (R.sup.2.sub.3 SiO.sub.1/2).sub.c (R.sup.3 O.sub.1/2).sub.din which R.sup.1 is an epoxy-functional monovalent organic group, R.sup.2 is a monovalent hydrocarbon group, R.sup.3 is a hydrogen atom or an alkyl group having no more than 4 carbon atoms, a>0, b>0, d>0 and c.gtoreq.0.
    Type: Grant
    Filed: February 5, 1997
    Date of Patent: April 6, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Katsutoshi Mine, Takae Takeuchi, Kimio Yamakawa
  • Patent number: 5885741
    Abstract: A coating agent for a carrier for electrostatic latent image development comprised of (A) an organopolysiloxane having the formula (R.sub.3 SiO.sub.1/2).sub.a (R.sub.2 SiO.sub.2/2).sub.b (RSiO.sub.3/2).sub.c, wherein R is a monovalent hydrocarbon group or an epoxy-functional monovalent organic group, provided that the content of epoxy-functional monovalent organic groups relative to total R groups is 0.1 to 100 mol %, a is 0 or a positive number, b is a positive number, c is a positive number and a+b+c is 1; and (B) a curing agent.A carrier for electrostatic latent image development comprised of an inorganic powder coated with the coating agent described above.
    Type: Grant
    Filed: October 23, 1997
    Date of Patent: March 23, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Shoji Akamastu, Takao Amemiya
  • Patent number: 5883171
    Abstract: A heat-curable silicone rubber composition whose cure provides silicone rubber with excellent high-voltage electrical insulating properties. The heat-curable silicone rubber composition comprises:(A) polyorganosiloxane gum described by average compositional formulaR.sub.a SiO.sub.(4-a)/2,where R represents substituted and unsubstituted monovalent hydrocarbon groups and a is a number from 1.95 to 2.05 and that contains at least 2 silicon-bonded alkenyl groups in each molecule,(B) microparticulate silica,(C) zinc carbonate powder or basic zinc carbonate powder, and(D) organoperoxide.
    Type: Grant
    Filed: August 13, 1997
    Date of Patent: March 16, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Takao Matsushita, Osamu Takuman
  • Patent number: 5880227
    Abstract: A moisture-curable silicone composition is prepared from (A) an organopolysiloxane resin having hydrolyzable groups associated therewith, (B) a fluorosilicone resin having residual silanol groups associated therewith, (C) a hydrolyzable organosilane and (D) a cure accelerating catalyst. The cured composition of the invention in prepared by reacting the aforementioned components (A) through (D) in the presence of moisture and results in a material exhibiting superior oil- and water-repellent properties.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: March 9, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hideki Kobayashi, Toru Masatomi
  • Patent number: 5880199
    Abstract: A liquid silicone rubber composition that prior to its cure has a suitable fluidity and excellent moldability and that cures into a highly flame retardant silicone rubber molding with excellent electrical properties. The liquid silicone rubber composition comprises(A) polyorganosiloxane,(B) microparticulate silica,(C) aluminum hydroxide powder,(D) zinc carbonate powder,(E) polyorganohydrogensiloxane,(F) benzotriazole,(G) the reaction mixture of(a) a platinum compound and(b) 3,5-dimethyl-1-hexyn-3-ol, and(H) hydrosilylation reaction catalyst.
    Type: Grant
    Filed: May 22, 1997
    Date of Patent: March 9, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Takao Matsushita, Yasumichi Shigehisa, Yuichi Tsuji
  • Patent number: 5877256
    Abstract: The instant invention pertains to a liquid silicone rubber coating composition for application to air bags that is comprised of (A) a diorganopolysiloxane having at least 2 alkenyl groups in each molecule, (B) an organopolysiloxane resin, (C) an inorganic filler, (D) an organohydrogenpolysiloxane having at least 2 silicon-bonded hydrogen atoms in each molecule, (E) a platinum group metal catalyst, and (F) an epoxy group-containing organosilicon compound. The liquid silicone rubber coating composition of the instant invention is capable of coating synthetic air bag fabrics without the use of a diluting solvent and at the same time that has an excellent adhesion to and infiltrability into synthetic air bag fabrics.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: March 2, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Akito Nakamura, Yuichi Tsuji
  • Patent number: 5877237
    Abstract: The thermosetting silicone composition of the instant invention is comprised of (a) a diorganopolysiloxane containing alkenyl groups, (b) an organohydrogenpolysiloxane, (c) a platinum catalyst-containing silicone resin fine particle catalyst comprised of (i) a thermoplastic silicone resin containing 5 to 90 mole % PhSiO.sub.3/2 siloxane units and 5 to 20 mole % MeViSiO.sub.2/2 siloxane units, wherein Ph denotes phenyl, Me denotes methyl and Vi denotes vinyl; said resin having a glass transition point of 40.degree. to 70.degree. C. and (ii) 0.05 to 2 wt % as platinum atoms of a platinum catalyst; and (d) a hydrosilation reaction inhibiting compound. The thermosetting silicone compositions have excellent storage stability at about room temperature, and cure at a fast rate when heated.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: March 2, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Junji Nakanishi, Toshio Saruyama, Atsushi Togashi
  • Patent number: 5877228
    Abstract: Method for curing UV-curable silicone compositions, characterized by the formation of cured silicone, having a low-tack surface that is harder than the interior, by exposing an ultraviolet-curable silicone composition to ultraviolet radiation at a ratio of the exposure dose for wavelengths of 200 to 280 nm (excluding 280 nm) to the exposure dose for wavelengths of 280 to 400 nm of 0.5 to 10.0.
    Type: Grant
    Filed: September 9, 1997
    Date of Patent: March 2, 1999
    Assignee: Dow Corning Toray Silicone Co., LTD.
    Inventors: Katsutoshi Mine, Hiroyoshi Naito, Kimio Yamakawa
  • Patent number: 5874602
    Abstract: A process for preparing a compound having the formula ##STR1## is disclosed, said process comprising hydrolyzing an organosilicon compound of the formula ##STR2## wherein X is a radically polymerizable group-functional organic group, R.sup.1 is independently selected from monovalent hydrocarbon groups that are free of aliphatic unsaturation, R.sup.2 is independently selected from the group consisting of hydrogen and a monovalent hydrocarbon group and m is an integer having a value of 1 to 3.
    Type: Grant
    Filed: March 27, 1998
    Date of Patent: February 23, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Ryuko Manzouji, Tadashi Okawa
  • Patent number: 5872194
    Abstract: A curable composition containing a curable liquid-form organopolysiloxane composition and a curable liquid-form organic resin composition. The organic resin composition is contained as liquid particles in the organopolysiloxane composition. A cured product formed by curing the abovementioned curable liquid composition such that the cured product contains fine particles of a cured organic resin in a cured organopolysiloxane matrix. An electronic part which is covered by the cured product of the abovementioned curable liquid-form composition.
    Type: Grant
    Filed: July 8, 1997
    Date of Patent: February 16, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Minoru Isshiki, Katsutoshi Mine, Kimio Yamakawa
  • Patent number: 5866653
    Abstract: A curable silicone rubber composition comprising (A) organopolysiloxane comprising at least 2 silicon atom-bonded alkenyl groups in each molecule described by formula R.sub.a SiO.sub.(4-a)/2, where R represents a substituted or unsubstituted monovalent hydrocarbon group and a is a number from 1.95 to 2.05; (B) fine powdery silica; (C) a reaction mixture of (a) a platinum compound and (b) a compound containing an alkynyl group and an alcoholic hydroxy group in each molecule; and (D) a curing agent. The present invention is also a manufacturing method of curable silicone rubber composition. The curable silicone rubber compositions have an excellent flame-retarding property and good tracking resistance and other electrical properties.
    Type: Grant
    Filed: December 15, 1997
    Date of Patent: February 2, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Takao Matsushita, Osamu Takuman
  • Patent number: 5866640
    Abstract: A silicone rubber composition having improved mold release properties comprising (A) silicone rubber base compound, (B) organopolysiloxane having no aliphatic unsaturated groups, (C) higher fatty acid or higher fatty acid metal salt, (D) water, and (E) curing agent.
    Type: Grant
    Filed: July 25, 1996
    Date of Patent: February 2, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroshi Honma, Takao Matsushita, Kenji Ota
  • Patent number: 5861460
    Abstract: A highly productive, continuous method for the production of room-temperature-curable organopolysiloxane compositions is obtained by continuously feeding 100 parts by weight of a diorganopolysiloxane with a viscosity at 25.degree. C. of 0.1 to 500 Pa.
    Type: Grant
    Filed: March 28, 1996
    Date of Patent: January 19, 1999
    Assignee: Dow Corning Toray Silicone Co., LTD.
    Inventors: Mitsuo Hamada, Tomoo Kinoshita, Hideyuki Mori, Junya Yokoi
  • Patent number: 5861458
    Abstract: What is discussed herein is a silicone water-based emulsion mold release agent characterized by the fact that its principal ingredient is the condensation reaction product of a diorganopolysiloxane having the general formula ##STR1##
    Type: Grant
    Filed: July 1, 1996
    Date of Patent: January 19, 1999
    Assignee: Dow Corning Toray Silicone Co., LTD.
    Inventors: Tsutomu Naganawa, Hiroki Ishikawa, Isao Ona
  • Patent number: 5861449
    Abstract: The introduction of a clay-like organopolysiloxane composition that is highly qualified for application as a clay-like material for manual arts and crafts and handicrafts (children's modelling clay, handicraft clay, etc.) and that does not deteriorate with time, is highly workable, is freely deformable by the application of low stresses, and, once formed, can preserve its shape while in the quiescent state.
    Type: Grant
    Filed: May 12, 1993
    Date of Patent: January 19, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hiroshi Akitomo, Tsugio Nozoe
  • Patent number: 5856545
    Abstract: A process for the production of organopentasiloxane represented by the general formula: ##STR1## wherein R.sup.1 is an acryloyloxy-containing monovalent organic group or a methacryloyloxy-containing monovalent organic group; R.sup.3 is a monovalent hydrocarbon group; X is a hydrolytic group; and the subscript n is 0, 1, or 2; which is characterized subjecting (A) 1-hydroxy-organotetrasiloxane, or an organosiloxane oligomer mixture comprising it as the main component, which is obtained by hydrolyzing 1-acyloxy-organotetrasiloxane or an oganosiloxane oligomer mixture comprising it as the main component; and (B) hydrolytic silane represented by the general formula R.sup.3.sub.n SiX.sub.(4-n) to a condensation reaction.
    Type: Grant
    Filed: December 5, 1997
    Date of Patent: January 5, 1999
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventor: Tadashi Okawa
  • Patent number: 5853896
    Abstract: The present invention relates to a water-repellent composition for a vehicle window glass which does not cause corrosion of metal components such as wipers, said composition being prepare by mixing:(A) 100 parts by weight of an organosilane having the formulaR.sup.1.sub.a SiX.sub.(4-a)wherein R.sup.1 is a monovalent hydrocarbon group having 3 to 20 carbon atoms, X is a hydrolyzable group and a is an integer having a value of 1 to 3; and(B) 10 to 1,000 parts by weight of a diorganopolysiloxane having a viscosity of 0.65 to 500 centistokes at 25.degree. C. and having the formula ##STR1## wherein R.sup.2 is a monovalent hydrocarbon group having 1 to 6 carbon atoms and n is an integer having a value greater than 0, said composition being free of acid having an acid dissociation index (pKa) below 5.0.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: December 29, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Hidetoshi Kondo, Atsushi Sakuma
  • Patent number: 5851431
    Abstract: The invention concerns a microemulsion having a mean particle size of 0.15 microns or less comprising:(A) an organopolysiloxane having at least one epoxy containing group per molecule, wherein said epoxy containing group is selected from the group consisting of: ##STR1## where R.sup.1 and R.sup.2 are divalent hydrocarbon groups,and wherein said organopolysiloxane also has carboxyl containing groups present in the amount of 0.5 to 15 moles of caboxyl containing groups per mole of silicon atoms in said organopolysiloxane, wherein said carboxyl containing groups are expressed by the formula:--R.sup.3 --COOR.sup.4whereR.sup.3 is a divalent hydrocarbon group, andR.sup.4 is selected from the group consisting of hydrogen atoms, monovalent hydrocarbon groups and silyl groups expressed by the formula --SiR.sup.5.sub.3, where R.sup.5 indicates the same or different monovalent hydrocarbon groups; (B) a nonionic surfactant; and (C) water.
    Type: Grant
    Filed: April 30, 1997
    Date of Patent: December 22, 1998
    Assignee: Dow Corning Toray Silicone Co., LTD.
    Inventors: Hiroki Ishikawa, Tsutomu Naganawa, Isao Ona