Wherein One Of Said Silicon Materials Contains Si-h Bond Patents (Class 525/478)
  • Patent number: 5866261
    Abstract: A composition of matter comprising:(a) about 60 to about 99 parts by weight of a curable epoxypolyorganosiloxane;(b) about 1 to about 40 parts by weight of a crosslinkable silicone hydride resin having no epoxy functionality; and(c) about 0.1 to about 5 parts by weight of an curing agent, which, upon exposure to actinic radiation is capable of curing components (a) and (b);wherein the total amount of components (a) and (b) is 100 parts by weight and wherein said composition demonstrates surface release properties when coated and cured onto a substrate is provided. The composition is particularly useful in articles of manufacture where release properties are desired.
    Type: Grant
    Filed: December 20, 1996
    Date of Patent: February 2, 1999
    Assignee: Rhodia Inc.
    Inventors: Stuart R. Kerr, III, Reeshemah Beaty
  • Patent number: 5863969
    Abstract: The present invention provides novel vinyl containing organopolysiloxane elastomers which possess excellent low compression set and heat aging characteristics and which can advantageously be formulated into liquid silicone elastomer moldable compositions.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: January 26, 1999
    Assignee: General Electric Company
    Inventors: Brian J. Ward, Edward M. Jeram, Richard A. Striker
  • Patent number: 5863965
    Abstract: Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50.degree.. The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving impression quality.
    Type: Grant
    Filed: July 13, 1997
    Date of Patent: January 26, 1999
    Assignee: Dentsply Research & Development Corp.
    Inventor: Robert V. Hare
  • Patent number: 5863968
    Abstract: A high-consistency organosiloxane composition comprising fluorinated and non-fluorinated polyorganosiloxanes, which upon the addition of suitable cure components can be cured to form elastomers having improved tear strength and good resistance to hydrocarbon oil weep. The present composition comprises a reinforcing silica filler that has been treated with a tetraalkyldisilazane.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: January 26, 1999
    Assignee: Dow Corning Corporation
    Inventors: Paul Thomas Irish, Myron Timothy Maxson
  • Patent number: 5861457
    Abstract: The present invention relates to organopolysiloxane resin solutions which contain 1-alkenes and are free from aromatic hydrocarbons, processes for their preparation and their use in organopolysiloxane compositions from which it is possible to produce coatings which repel tacky substances.
    Type: Grant
    Filed: August 16, 1996
    Date of Patent: January 19, 1999
    Assignee: Wacker-Chemie GmbH
    Inventors: Richard Weidner, Friedrich Hockemeyer, Volker Frey, Reinhardt Muller, Hartmut Jahn
  • 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: 5859094
    Abstract: A platinum group-metal curing liquid silicone rubber compositions having improved physical properties such as tear and heat-aging, especially at durometers below about 35 and above about 65. The present inventors have unexpectedly discovered that the addition of diorganohydrogensiloxy end-blocked polydiorganosiloxanes and triorganosiloxy end-blocked polydiorganosiloxanes having a viscosity greater than about 10 Pa.cndot.s at 25.degree. C. to liquid silicone rubber compositions can provide for the described improved properties.
    Type: Grant
    Filed: September 3, 1996
    Date of Patent: January 12, 1999
    Assignee: Dow Corning Corporation
    Inventors: Lori Jean Conway, Phillip Joseph Griffith, Jary David Jensen, Peter Lamont
  • Patent number: 5852068
    Abstract: A dental impression composition for use in the preparation of the oral tissue models comprising a dimethicone-based polysiloxane polyester polymer having terminal fluorinated alkoxy substituents such that the fluorine content of the polysiloxane polyester is in the range from about 5% to about 30% by weight, and having the general formula A--?--B--C--!.sub.x --A, wherein x is an integer greater than 1; A is a fluorinated alkoxy group having the formula F.sub.3 C(CF.sub.2).sub.n (CH.sub.2).sub.m O-- wherein n is an integer from 3 to 17 and m is an integer from 2 to 4; B is a diacid; and C is a dimethicone-based polysiloxane copolyol having the formula:Me.sub.3 Si--?--OSiMeR.sup.1 --!--?--OSiMeR.sup.1 --!.sub.o --?--OSiMeR--!.sub.q --OSiMe.sub.3wherein Me is methyl, R is methyl or phenyl, o is an integer in the range from 1 to 19, q is an integer in the range from 0 to 200, and R.sup.1 is a polyoxyalkylene substituent having the formula--(--CH.sub.2).sub.3 --(DO).sub.a (EO).sub.b (FO--).sub.
    Type: Grant
    Filed: December 12, 1996
    Date of Patent: December 22, 1998
    Assignee: Jeneric/Pentron Incorporated
    Inventor: Sivananda S. Jada
  • Patent number: 5840806
    Abstract: Disclosed is a curable resin composition which can be applied for various uses such as top-coating compositions for cars, coating compositions for exterior walls of constructions, heat-resistant coating compositions, adhesives, ink compositions, compositions to be infiltrated into fibers and paper, and surface-treating compositions. The composition comprises (A) a resin obtained by condensation of a polymer having both a hydrolyzable silyl group and a particular functional group except such a hydrolyzable silyl group, and a particular polysiloxane, and (B) a compound capable of reacting with the functional group existing in the resin (A).
    Type: Grant
    Filed: January 7, 1997
    Date of Patent: November 24, 1998
    Assignee: Dainippon Ink and Chemicals, Inc.
    Inventors: Shigeru Komazaki, Shinichi Kudo, Masataka Ooka
  • Patent number: 5837793
    Abstract: There is disclosed a silicone rubber powder prepared from a curable silicone composition, said powder comprising a polyorganosiloxane drain having at least one silicon-bonded polyoxyalkylene group of the formula--R.sup.1 (OR.sup.2).sub.m OR.sup.3wherein R.sup.1 is an alkylene radical, R.sup.2 is an alkylene radical, R.sup.3 is selected from the group consisting of hydrogen and alkyl radicals and m is an integer having a value of 2 to 100. The rubber powder is preferably prepared by curing the above silicone composition to form a cured silicone rubber and then pulverizing the silicone rubber.
    Type: Grant
    Filed: March 17, 1997
    Date of Patent: November 17, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventors: Asao Harashima, Yoshitsugu Morita, Ryuji Tachibana
  • Patent number: 5830950
    Abstract: Novel rubber-modified rigid silicone resins a novel method of making the same are disclosed. The resins are the copolymerized reaction product of (A) an organosilicon composition selected from the group consisting (I) an organosilicone resin, (II) hydrolyzable precursors of (I), and an hydrolyzate of (II) and (B) an silicone rubber. In the method of the invention, the copolymerization step is carried out in an organic solvent, preferably utilizing a relatively weak condensation catalyst. Thereafter, the solution is devolatilized and the composition cured by heating.
    Type: Grant
    Filed: December 31, 1996
    Date of Patent: November 3, 1998
    Assignees: Dow Corning Corporation, Massachusetts Inst. Tech.
    Inventors: Dimitris Elias Katsoulis, John Robert Keryk, Frederick Jerome McGarry, Bizhong Zhu
  • Patent number: 5830951
    Abstract: Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50.degree.. The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving impression quality. A low viscosity impression material is provided and includes a base component and a catalyst component. Both components are siloxane-based materials.
    Type: Grant
    Filed: December 19, 1996
    Date of Patent: November 3, 1998
    Assignee: Dentsply DeTrey G.m.b.H.
    Inventor: Jurgen Hans Fiedler
  • Patent number: 5824760
    Abstract: A thermal transfer image-receiving sheet having a dye-receiving layer, which is excellent in reaction rate of a release agent, coating strength of a release layer and releasability from a thermal transfer sheet. The thermal transfer image-receiving sheet comprises a substrate sheet and a dye-receiving layer provided on at least one surface of the substrate sheet, wherein the dye-receiving layer contains a release agent mixture comprising an addition-polymerizable silicone and a hydrogen-modified silicone or wherein the dye-receiving layer has on its surface a release layer comprising an addition-polymerizable silicone and a hydrogen-modified silicone. The present invention relates also to a process for producing the above thermal transfer image-receiving sheets.
    Type: Grant
    Filed: June 19, 1996
    Date of Patent: October 20, 1998
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Yoshihiko Tamura, Mitsuru Tsuchiya
  • Patent number: 5804616
    Abstract: Epoxy-polysiloxane polymer compositions of this invention are prepared by combining a resin component with a hardener component. The resin component comprises a non-aromatic epoxy resin ingredient and a polysiloxane ingredient. The hardener component comprises an amine and optionally an organotin catalyst. The composition can also include aggregates, pigments, and other additives depending on the particular end use. The composition is prepared using a sufficient amount of water to promote hydrolysis of the polysiloxane and the polycondensation of the silanols produced by such hydrolysis. In its cured form, the epoxy-polysiloxane composition exists as a uniformly dispersed arrangement of linear epoxy chain fragments that are cross-linked with a continuous polysiloxane polymer chain, thereby forming a non-interpenetrating polymer network chemical structure that has substantial advantages over conventional epoxy systems.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: September 8, 1998
    Assignee: Ameron International Corporation
    Inventors: Norman R. Mowrer, Raymond E. Foscante, J. Luis Rojas
  • Patent number: 5795947
    Abstract: Functional mixed polyorganosiloxanes, well suited for formulation into curable release compositions, notably for paper, comprise the same or different recurring structural units of the formula (I):R.sub.a Y.sub.b X.sub.c SiO.sub.(4-a-b-c)/2 (I)in which the radicals R are each an alkyl, vinyl, aryl or aralkyl radical, at least 80% of the radicals R being methyl radicals, the radicals X are each H or a reactive polar functional group devoid of the heteroatoms nitrogen and sulfur, the radicals Y are at least C.sub.4 alkenyl or alkenyloxy radical containing at least one site of ethylenic unsaturation at a polymer chain end or along the polymer chain, a, b and c are equal to 0, 1, 2 or 3, and a+b+c=0, 1, 2 or 3, with the proviso that the number of SiO.sub.
    Type: Grant
    Filed: July 11, 1996
    Date of Patent: August 18, 1998
    Assignee: Rhone-Poulenc Chimie
    Inventors: Jean-Marc Frances, Andre Soldat
  • Patent number: 5792813
    Abstract: A fluorescent polymer having the moiety ##STR1## is disclosed. R.sub.1 and R.sub.2 are H.sub.1 alkyl, or aromatic. R.sub.3, R.sub.4, and R.sub.5 are aromatic. A preferred fluorescent composition may be formed by combining the fluorescent polymer with a second polymer, such as polystyrene or polysilystyrene.
    Type: Grant
    Filed: March 14, 1997
    Date of Patent: August 11, 1998
    Assignee: Wisconsin Alumni Research Foundation
    Inventors: Chien-Hua Yuan, Robert C. West
  • Patent number: 5789495
    Abstract: The present invention is hydrophobic organosilicate-modified silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of an organosilicate-modified silica hydrosol is adjusted with a base to within a range of about pH 3 to pH 7 to facilitate formation of an organosilicate-modified silica hydrogel. In the second step the organosilicate-modified silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the organosilicate-modified silica hydrogel to form a hydrophobic organosilicate-modified silica gel having a surface area within a range of about 100 m.sup.2 /g to 850 m.sup.2 /g in the dry state.
    Type: Grant
    Filed: February 24, 1997
    Date of Patent: August 4, 1998
    Assignee: Dow Corning Corporation
    Inventors: Gary Thomas Burns, Qin Deng, James Richard Hahn, Clifford Carlton Reese
  • Patent number: 5786413
    Abstract: Organopolysiloxane resin powders having a mean particle diameter (median value d.sub.50,3) of from 70 to 300 .mu.m and a proportion of resin particles having a diameter <45 .mu.m of less than 5 percent by weight, based on the total weight of the organopolysiloxane resin powder.
    Type: Grant
    Filed: January 23, 1996
    Date of Patent: July 28, 1998
    Assignee: Wacker-Chemie GmbH
    Inventors: Richard Weidner, Hermann Blank, Volker Frey, Johann Schuster
  • Patent number: 5783311
    Abstract: CVE polyorganosiloxane compositions crosslinkable into silicone elastomeric state, well suited for the protective coating of a wide variety of substrates and supports, notably vehicular airbags, are improvedly adhered thereto by including in said CVE silicone compositions an adhesiveness promoter comprising (1) at least one alkoxylated organosilane containing, per molecule, at least one C.sub.2 -C.sub.6 alkenyl radical, (2) at least one organosilicon compound containing at least one epoxy radical, and (3) at least one chelate of metal M and/or a metal alkoxide having the formula: M(OJ).sub.n, wherein n is the valency of M, J is a linear or branched C.sub.1 -C.sub.8 alkyl radical, and M is selected from among Ti, Zr, Ge, Li, Mn, Fe, Al and Mg.
    Type: Grant
    Filed: January 27, 1997
    Date of Patent: July 21, 1998
    Assignee: Rhone-Poulenc Chimie
    Inventors: Dominique Lorenzetti, Pierre-Michel Peccoux
  • Patent number: 5777047
    Abstract: Organosiloxane compositions curable to silicone elastomers having improved weep properties are described. The compositions include an alkenyl-containing polydiorganosiloxane, an organohydrogensiloxane, a platinum-group metal catalyst and a MQ-type resinous organosiloxane copolymer having at least one fluorine atom-containing group per molecule; and a silicone elastomer prepared from such composition. A method of minimizing the leakage of a hydrocarbon fluid from a container using the silicone elastomer is also described.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: July 7, 1998
    Assignee: Dow Corning Corporation
    Inventors: Kyuha Chung, Stephen Clay Warren
  • Patent number: 5760116
    Abstract: A composition comprising the hydrosilylation addition product of a linear alkenyl functionalized polyorganosiloxane and an M.sup.H Q resin and a low molecular weight silicone when subjected to shearing provides for components in personal care formulations that have improved spreadability and substance.
    Type: Grant
    Filed: September 5, 1996
    Date of Patent: June 2, 1998
    Assignee: General Electric Company
    Inventors: John A. Kilgour, Virginia Van Valkenburgh Powell
  • Patent number: 5760145
    Abstract: Novel crosslinkable compositions are described, comprising (A) organopolysiloxanes containing aliphatically unsaturated hydrocarbon radicals, comprising;(a) at least one unit, per molecule, of the formula ##STR1## in which A is a radical of the formula--(OSiR.sup.1 R.sup.2).sub.z --(OSiR.sub.2).sub.x --Y--SiR.sub.2 O.sub.1/2,R is identical or different and is a monovalent, aliphatically saturated or aromatic hydrocarbon radical having 1 to 12 carbon atoms per radical,R.sup.1 is a radical of the formula --OSiR.sub.2 --Y--SiR.sub.2 O.sub.1/2,R.sup.2 has the meaning of R, R.sup.1 or R', where R' is a monovalent, aliphatically saturated or aromatic hydrocarbon radical having 1 to 12 carbon atoms per radical, which contains one or more heteroatoms chosen from the group consisting of O, S, N, Si and Ti,Y is a divalent hydrocarbon radical of the formula --CH.sub.2 CHR.sup.5 (--R.sup.4).sub.v --, in whichR.sup.
    Type: Grant
    Filed: June 26, 1997
    Date of Patent: June 2, 1998
    Assignee: Wacker-Chemie GmbH
    Inventors: Christian Herzig, David Huettner, Kathy Beekel
  • Patent number: 5756598
    Abstract: Organosiloxane compositions curable to silicone elastomers having improved weep properties are described. The compositions include an alkenyl-containing polydiorganosiloxane, an organohydrogensiloxane, a platinum-group metal catalyst and a MQ-type resinous organosiloxane copolymer; and a silicone elastomer prepared from such composition. A method of a minimizing the leakage of a hydrocarbon fluid from a container using the silicone elastomer is also described.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: May 26, 1998
    Assignee: Dow Corning Corporation
    Inventors: Kyuha Chung, Stephen Clay Warren
  • Patent number: 5750643
    Abstract: Novel methods for the preparation of polymers useful as precursors to ceramic materials by catalytic activation of Si--H bonds are disclosed. The methods comprise reacting, in the presence of a catalyst effective to activate Si--H bonds, Si--N bonds, or both, and/or a reactive solvent, a polymer in the form of a polysilane, polysilazane, polysiloxane or polycarbosilane with a reactant having the structural formula R--X--H, wherein X is NR' or O, R is H, organic, silyl, siloxyl, silazanyl or carbosilyl and may contain at least one additional X--H group, and R' is H, amino, silyl or silazanyl, to produce a modified polymer containing at least one Si--X bond. Polymers produced by these methods are also disclosed.
    Type: Grant
    Filed: May 18, 1993
    Date of Patent: May 12, 1998
    Assignee: SRI International
    Inventors: Yigal Blum, Gregory A. McDermott
  • Patent number: 5750588
    Abstract: A one-part type radiation curable silicone composition capable of curing at an ordinary temperature is provided. The silicone composition comprises an unsaturated group-containing polyorganosiloxane and a polysilane in which at least one at least two silicon atoms are bonded to each other and which has at least one polyorganosiloxane group in a side chain thereof.
    Type: Grant
    Filed: September 27, 1996
    Date of Patent: May 12, 1998
    Assignee: Three Bond Co., Ltd.
    Inventors: Toru Takeoka, Stephen J. Clarson, Barry Goldslager
  • Patent number: 5747625
    Abstract: The present invention provides a novel silicate group-containing polyimide which is excellent in mechanical properties, heat resistance and electrical properties and has an excellent film forming ability. Further, the present invention provides a film-formable heat resistant material having an excellent solvent resistance, elasticity and adhesive property. The silicate group-containing polyimide has a repeated unit represented by the following Formula (1): ##STR1## wherein Ar.sub.1 represents a tetravalent organic group; R.sub.1 and R.sub.2 each are a single bond or represent an alkylene group having 1 to 4 carbon atoms or a phenylene group; R.sub.3 to R.sub.7, R.sub.9 and R.sub.10 each represent a hydrocarbon group having 1 to 6 carbon atoms; R.sub.8 represents an ethylene group or an alkylene group having 3 to 6 carbon atoms; m and n represent independently an integer of 1 to 10; and k represents an integer of 0 to 2.
    Type: Grant
    Filed: November 26, 1996
    Date of Patent: May 5, 1998
    Assignee: Nippon Steel Chemical Co., Ltd.
    Inventors: Nobuyuki Furukawa, Takeshi Fujiyama, Masatoshi Yuasa
  • Patent number: 5739948
    Abstract: A refractive index modulation element made of a refractive index modulation material. The refractive index can be thermally modulated. The refractive index modulation material can be a silicone resin represented by the following formula R.sub.n SiO.sub.(4--n)/2,where the average value of n is 0.5 to 3 and where K is an aliphatic or aromatic group with 1 to 18 carbon atoms or other functional group. The silicone resin has a spectral transmission factor that on average is higher than 80%, within the wavelength range of 350 nm to 1,600 nm, and a refractive index temperature dependence of -0.001/.degree.C. to -0.00005/.degree.C.
    Type: Grant
    Filed: October 8, 1996
    Date of Patent: April 14, 1998
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Nobuo Kushibiki, Fumito Nishida, Takuya Ogawa, Toshio Suzuki
  • Patent number: 5739199
    Abstract: Cross-liked resins exhibiting a high level of optical transparency and little variation of refractive index with temperature are prepared using mixtures of two organosiloxane resins in combination with a reinforcing silica filler. The types and relative concentrations of hydrocarbon radicals in the resins are within specified limits to obtain the required optical properties and each resin contains groups that react with groups on the other resin to form a crosslinked network.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: April 14, 1998
    Assignee: Dow Corning Asia, Ltd.
    Inventors: Katsuya Eguchi, Nobuo Kushibiki, Toshio Suzuki
  • Patent number: 5733978
    Abstract: The introduction of a novel curable resin composition that is characterized by the ability to cure at temperatures at or above its melting-initiation temperature through the rapid, hydrosilylation-based formation of a crosslinked structure. Said curable resin composition comprising(A) an acrylic resin that has at least 2 silicon-bonded alkenyl groups in each molecule and a melting-initiation temperature of at least 40.degree. C.;(B) an acrylic resin that has at least 2 hydrosilyl groups in each molecule and a melting-initiation temperature of at least 40.degree. C., in a quantity that yields a value from 1:0.3 to 1:30 for the molar ratio of silicon-bonded alkenyl groups in component (A) to silicon-bonded hydrogen atoms in component (B); and(C) a hydrosilylation reaction catalyst in sufficient quantity to cure the composition.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: March 31, 1998
    Assignee: Dow Corning Toray Silicone Co., Ltd.
    Inventor: Akihiko Kobayashi
  • Patent number: 5723521
    Abstract: Solventless silicone resins, which exhibit a high degree of reconstitution, are produced in forms such as powders and flakes. The degree of reconstitution is judged by the fact that silicone resin/fluid alloys produced therefrom exhibit only a minor shift in T.sub.g, the glass transition temperature, in comparison to analogous alloys produced from solvent dispersed (virgin) resin. Resin, and preferably virgin resin, is dispersed in a volatile liquid dispersant and blended with a nonvolatile silicone fluid. Thereafter, the volatile liquid dispersant is removed by means such as spray-drying or evaporation, resulting in the solventless resin forms of the invention.
    Type: Grant
    Filed: July 3, 1995
    Date of Patent: March 3, 1998
    Assignee: Dow Corning Corporation
    Inventors: Leon Neal Cook, Richard Allen Hessick, Jr., Hongxi Zhang, Randall Gene Schmidt
  • Patent number: 5708075
    Abstract: The present invention relates to a curable silicone release coating composition comprising (A) an organopolysiloxane having at least two alkenyl groups per molecule, (B) an organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule, (C) a siloxane resin having silicon-bonded hydrogen groups, (D) a platinum group metal-containing catalyst, and optionally (E) an inhibitor. The compositions of this invention are useful as release coatings for pressure sensitive adhesives.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Corporation
    Inventors: Kyuha Chung, Robert Alan Ekeland, Randall Gene Schmidt
  • Patent number: 5708098
    Abstract: Solventless, thermoplastic silicone pellets are prepared blending silicone resins (A) of the MQ-type and with predominantly linear silicone fluids (B), such as polydimethylsiloxane liquids and gums, to substantially homogeneity. The blends are heated to a predetermined compression-forming temperature, compression-formed to a densified mass and shaped into a pellet form. The composition of the pellets is balanced such that the pellets exhibit plastic flow at the predetermined compression-forming temperature and resist agglomeration at temperatures at or below a predetermined maximum storage temperature.
    Type: Grant
    Filed: August 28, 1996
    Date of Patent: January 13, 1998
    Assignee: Dow Corning Corporation
    Inventors: Leon Neal Cook, Richard Allen Hessick, Jr., Kevin Edward Lupton, David Joseph Romenesko, Randall Gene Schmidt, Hongxi Zhang
  • Patent number: 5703190
    Abstract: The present invention relates to crosslinkable compositions are described, containing(1) organosilicon compounds which have radicals containing aliphatic carbon-carbon multiple bonds, and(2) organosilicon compounds having Si-bonded hydrogen atoms, or(3) organosilicon compounds where radicals with aliphatic carbon-carbon multiple bonds and Si-bonded hydrogen atoms are present in the same compound,(4) catalysts which promote the addition of Si-bonded hydrogen onto aliphatic multiple bond, and(5) agents which retard the addition of Si-bonded hydrogen onto aliphatic multiple bond at room temperature, of the formula ##STR1## in which R.sup.1, R.sup.2, R.sup.4, R.sup.5 and R.sup.6 are identical or different and are a hydrogen atom or a monovalent, substituted or unsubstituted hydrocarbon radical having 1 to 12 carbon atoms per radical,R.sup.
    Type: Grant
    Filed: August 23, 1996
    Date of Patent: December 30, 1997
    Assignee: Wacker-Chemie GmbH
    Inventors: Jochen Dauth, Christian Herzig, Bernward Deubzer, Klaus Schnitzer, David Huettner
  • Patent number: 5700870
    Abstract: Aqueous emulsions comprising(1) an organopolysiloxane with SiC-attached vinyl groups in the terminal units,(2) an organopolysiloxane with at least 3 Si-attached hydrogen atoms,(3) a catalyst promoting the addition of Si-attached hydrogen to aliphatic multiple bonds,(4) an organosilicon adhesion promoter,(5) a silicone resin,(6) an emulsifier and(7) water.
    Type: Grant
    Filed: April 9, 1996
    Date of Patent: December 23, 1997
    Assignee: Wacker-Chemie GmbH
    Inventors: Johann Mueller, Ingrid Kern
  • Patent number: 5696211
    Abstract: Release modifier composition useful in release coating compositions comprising a fluorosilicone compound having perfluoroalkyl groups and at least three silicon-bonded hydrogen atoms and a MQ resin having at least one alkenyl group.Release coating compositions comprising the release modifier compositions and a method for modifying the release force of release coating compositions is also claimed.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: December 9, 1997
    Assignee: Dow Corning Corporation
    Inventors: Kyuha Chung, Simon Hurford, Bhukandas Parbhoo
  • Patent number: 5696209
    Abstract: The invention pertains to an dual-cure silicone adhesive composition that is extrudable and flowable at room temperature in the absence of a solvent comprising (A) 40 to 95 parts of an alkenyl functional siloxane resin said resin containing 0.01 to 22 wt% alkenyl functionality; (B) 0.5 to 20 parts of a SiH containing polyorganosiloxane having an average of at least 1.7 silicon-bonded hydrogen atoms per molecule and having a viscosity of 0.8 to 2,000 mm.sup.2 /s; (C) a silane represented by monomers of the formula R.sup.1.sub.4-y Si(OR.sup.2).sub.y or oligomeric reaction products thereof; (D) a hydrosilylation catalyst in sufficient quantity to promote curing of said composition; (E) a moisture curing catalyst to promote the moisture initiated reaction of the alkoxy radicals; (F) optionally, 0.1 to 70 parts of a polydiorganosiloxane having at least two ethylenically or acetylenicaly unsaturated groups per molecule and having a viscosity of 100 to 80,000 mm.sup.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: December 9, 1997
    Assignee: Dow Corning Corporation
    Inventors: Russell Keith King, Chi-Long Lee
  • Patent number: 5696210
    Abstract: This invention pertains to an addition-curable silicone adhesive composition that is extrudable and flowable at room temperature in the absence of a solvent comprising (A) 40 to 95 parts of an alkenyl functional siloxane resin consisting essentially of R.sub.3 SiO.sub.1/2 siloxane units and SiO.sub.4/2 siloxane units, wherein R is a monovalent hydrocarbon radical having 1 to 6 carbon atoms; there being from 0.5 to 1.5 R.sub.3 SiO.sub.1/2 units for every SiO.sub.4/2 units; said resin containing 0.01 to 22 wt % alkenyl functionality; (B) 0.5 to 10 parts of an SiH containing polyorganosiloxane having an average of at least 2 silicon-bonded hydrogen atoms per molecule and having a viscosity of 0.8 to 2,000 mm.sup.2 /s; (C) a hydrosilylation catalyst in sufficient quantity to promote curing of said composition; (D) optionally, up to 70 parts of a polydiorganosiloxane having at least two ethylenically or acetylenically unsaturated groups per molecule and having a viscosity of 100 to 80,000 mm.sup.
    Type: Grant
    Filed: October 9, 1996
    Date of Patent: December 9, 1997
    Assignee: Dow Corning Corporation
    Inventors: Russell Keith King, Chi-Long Lee
  • Patent number: 5691435
    Abstract: The present invention provides crosslinkable compositions comprising(A) an organosilicon compound having radicals containing aliphatic carbon-carbon multiple bonds,(B) an organosilicon compound having Si-bonded hydrogen atoms,(C) a catalyst which promotes the addition of Si-bonded hydrogen onto aliphatic multiple bond, and optionally(D) an agent which retards the addition of Si-bonded hydrogen onto aliphatic multiple bond at room temperatureand to the use of the crosslinkable compositions for producing coatings which repel tacky substances.The present invention also relates to organosilicon compounds having Si-bonded hydrogen atoms, and to a process for their preparation.
    Type: Grant
    Filed: January 14, 1997
    Date of Patent: November 25, 1997
    Assignee: Wacker-Chemie GmbH
    Inventors: Christian Herzig, Bernward Deubzer, Martina Bloechl, Robert Banfic
  • Patent number: 5691434
    Abstract: There is provided a curable organopolysiloxane composition comprising (A) an organopolysiloxane containing, in its molecule, at least two groups represented by the general formula (1):CH.sub.2 .dbd.CH--(CH.sub.2).sub.a --(OC.sub.b H.sub.2b).sub.c --O--(1)wherein a is an integer of 1 to 8, b is an integer of 2 to 4, and c is an integer of 0 to 3; (B) an organohydrogenpolysiloxane containing, in its molecule, at least two hydrogen atoms each bonded to a silicon atom; (C) an addition-reaction retarder; and (D) a platinum family metal catalyst. The composition is fast in curing speed and superior in curing stability.
    Type: Grant
    Filed: December 2, 1996
    Date of Patent: November 25, 1997
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Masahiko Ogawa, Takamasa Toyoda, Kenichi Isobe
  • Patent number: 5686547
    Abstract: Carbonate and hydroxy carbamate functionalized silicones and a process for their preparation are described. Hydroxy carbamate functionalized silicones are useful in personal care and cosmetic compositions.
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: November 11, 1997
    Assignee: General Electric Company
    Inventor: Susan A. Nye
  • Patent number: 5679734
    Abstract: The present invention relates more specifically to silicone compositions which can be crosslinked into an adhesive gel by hydrosilylation at room temperature, as well as to the gels thus obtained. One of the objects of the invention is to produce, easily and rapidly, gels having viscoelastic qualities, low-temperature physical stability and adhesion properties.This objective is achieved by virtue of the compositions comprising:a polyorganosiloxane POS (I) of the SiVi type (Vi=vinyl);a POS (II) of the SiH type;an extender POS (III) of the .alpha.,.omega.-hydrogen, SiH type; and, optionally, a diluent POS (IV) of the polydimethylsiloxane type; where ##EQU1## Application: protection of electronic equipment (potting), adhesives, prostheses.
    Type: Grant
    Filed: April 12, 1996
    Date of Patent: October 21, 1997
    Assignee: Rhone-Poulenc Chimie
    Inventors: Pierre-Michel Peccoux, Christian Pusineri
  • Patent number: 5668205
    Abstract: A silicone rubber composition of the addition curing type containing an organopolysiloxane having at least two aliphatic unsaturated hydrocarbon groups in a molecule, silica, an organohydrogenpolysiloxane, a platinum catalyst, and a liquid organopolysiloxane blocked with a (CH.sub.3).sub.3 SiO.sub.1/2 unit at either end, having a monovalent hydrocarbon group (exclusive of an aliphatic unsaturated hydrocarbon group) attached to a silicon atom, provides a composition heat curable to a silicone rubber having improved weathering and tracking resistance and thus useful for high-voltage electrical insulators. Also, a silicone rubber composition containing an organopolysiloxane, an inorganic filler and an organic peroxide is improved by using as the organopolysiloxane one or more organopolysiloxanes of the formula: R.sup.6.sub.f SiO.sub.(4-f)/2, and blending therein aluminum hydroxide.
    Type: Grant
    Filed: July 3, 1996
    Date of Patent: September 16, 1997
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Takeo Yoshida, Azechi Shuuichi
  • Patent number: 5668225
    Abstract: An oil-bleeding waterproof sealer for a connector comprising a vulcanized and molded article of a composition comprising: (A) 100 parts by weight of a diorganopolysiloxane green rubber containing at least two alkenyl groups bonded to silicon atoms per molecule thereof, (B) from 10 to 100 parts by weight of a reinforcing filler, (C) from 0.1 to 10 parts by weight of an organohydrogenopolysiloxane having at least two hydrogen atoms bonded to silicon atoms per molecule thereof, (D) from 1 to 30 parts by weight of a phenyl-containing diorganopolysiloxane having a viscosity of 1 to 3,000 cSt at 25.degree. C., and (E) a catalytic amount of a catalyst for hydrosilylation having a particle size of 0.01 to 20 .mu.m, which comprises a platinum catalyst and a non-silicone series thermoplastic resin having a glass transition point of 50.degree. to 200.degree. C., with the proportion of metallic platinum in the catalyst for hydrosilylation being 0.01 to 5% by weight.
    Type: Grant
    Filed: December 30, 1996
    Date of Patent: September 16, 1997
    Assignee: Yazaki Corporation
    Inventors: Kiyotaka Okazaki, Sinichi Kogure, Masahiro Kanda, Shiroh Kobayashi
  • Patent number: 5665849
    Abstract: A modified hydrogen silsesquioxane (HSQ) precursor is disclosed, along with methods for depositing such a precursor on a semiconductor substrate and a semiconductor device having a dielectric thin film deposited from such a precursor. The method comprises coating a semiconductor substrate 10, which typically comprises conductors 12, with a film of a modified HSQ film precursor. The HSQ film precursor comprises a hydrogen silsesquioxane resin and a modifying agent, preferably selected from the group consisting of alkyl alkoxysilanes, fluorinated alkyl alkoxysilanes, and combinations thereof. The method further comprises curing film 14, wherein the inclusion of the modifying agent inhibits oxidation and/or water absorption by the film during and/or after curing. It is believed that the modifying agent modifies film surface 16 to produce this effect.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: September 9, 1997
    Assignee: Texas Instruments Incorporated
    Inventor: Chih-Chen Cho
  • Patent number: 5661198
    Abstract: The invention relates to an ablator composition for providing ablation protection. The ablator composition comprises 100 parts by weight of a mixture of vinyl-containing organopolysiloxanes, the mixture containing 50-80 wt. % of a diorganopolysiloxane which contains vinyl groups and 20-50 wt. % of a silicone resin which contains vinyl groups; an organohydrogenpolysiloxane containing in one molecule thereof at least three hydrogen atoms which are directly bonded to silicon atoms thereof; a catalyst which is at least one selected from the group consisting of metallic platinum and platinum compounds; up to 150 parts by weight of silica microballoons; and at least one selected from the group consisting of up to 15 parts by weight of quartz glass fibers and up to 15 parts by weight of carbon fibers. An ablator material prepared by curing the ablator composition has a low surface recession rate even under a condition of a high heating rate such as about 4 MW/m.sup.
    Type: Grant
    Filed: September 27, 1994
    Date of Patent: August 26, 1997
    Assignees: Nissan Motor Co., Ltd., Yoshifumi Inatani, Shin-Etsu Chemical Co., Ltd.
    Inventors: Yoshifumi Inatani, Kazunori Kawasaki, Tadashi Harada, Hironao Fujiki, Mikio Shiono
  • Patent number: 5661210
    Abstract: An optically clear platinum-group metal curable liquid silicone rubber composition having good physical properties. The composition comprises a vinyldimethylsiloxy-terminated polydimethyl(diphenyl)siloxane copolymer comprising about 1 to 20 mole percent diphenylsiloxy units and having a viscosity within a range of about 20,000 mPa.multidot.s to 100,000 mPa.multidot.s at 25.degree. C., vinyldimethylsiloxy-terminated polydimethyl(diphenyl)siloxane copolymer comprising about 1 to 20 mole percent diphenylsiloxy units and having a viscosity within a range of about 50 mPa.multidot.s to 10,000 mPa.multidot.s at 25.degree. C. and optionally comprising up to about 3 mole percent vinyldimethylsiloxy units, a treated reinforcing silica filler, and curing agents.
    Type: Grant
    Filed: September 25, 1996
    Date of Patent: August 26, 1997
    Assignee: Dow Corning Corporation
    Inventors: Gary Thomas Burns, Michael Robert Reiter
  • Patent number: 5661222
    Abstract: Improved two component polymerizable polyorganosiloxane compositions are described, particularly for use in making dental impressions, having improved tear strength and wettability. Improved tear strength results from inclusion of a quadri-functional polysiloxane having a vinyl content of 0.16 to 0.24 m-mole/g. Working time is maintained by including sufficient amounts of a retarder composition that delays onset of the vinyl polymerization. Wettability is improved by including a surfactant resulting in a surface contact angle with water at three minutes of less than 50.degree.. The surfactant chosen has an HLB of 8-11, such that the wetting contact angle is achieved within less than two minutes and remains wetting throughout the working time of the impression taking, substantially improving the impression making process.
    Type: Grant
    Filed: April 13, 1995
    Date of Patent: August 26, 1997
    Assignee: Dentsply Research & Development Corp.
    Inventor: Robert V. Hare
  • Patent number: 5658674
    Abstract: CVE polyorganosiloxane compositions crosslinkable into silicone elastomeric state, well suited for the protective coating of a wide variety of substrates and supports, notably vehicular airbags, are improvedly adhered thereto by including in said CVE silicone compositions an adhesiveness promoter comprising (1) at least one alkoxylated organosilane containing, per molecule, at least one C.sub.2 -C.sub.6 alkenyl radical, (2) at least one organosilicon compound containing at least one epoxy radical, and (3) at least one chelate of metal M and/or a metal alkoxide having the formula: M(OJ).sub.n, wherein n is the valency of M, J is a linear or branched C.sub.1 -C.sub.8 alkyl radical, and M is selected from among Ti, Zr, Ge, Li, Mn, Fe, Al and Mg.
    Type: Grant
    Filed: May 3, 1995
    Date of Patent: August 19, 1997
    Assignee: Rhone-Poulenc Chimie
    Inventors: Dominique Lorenzetti, Pierre-Michel Peccoux
  • Patent number: 5652287
    Abstract: A resin composition which comprises:(A) from about 99.5 to about 70 percent by weight, based on the total weight of components (A) and (B), of a poly(arylene sulfide) having a melt viscosity of from about 300 to about 8,000 poise at 1,200 sec.sup.-1 and 310.degree. C.;(B) from about 0.5 to about 30 percent by weight, based on the total weight of components (A) and (B), of a substantially non-functionalized, emulsion cured silicone rubber which is the condensation product of (i) an organopolysiloxane having at least two active hydrogen functional groups per molecule, and (ii) an organohydrogenpolysiloxane having at least two silicon-bonded hydrogen atoms per molecule, said silicone rubber being melt dispersable with the poly(arylene sulfide); and(C) from about 0.1 to about 2.0 parts by weight, based on 100 parts by weight of components (A), (B) and (C) combined, of an aminosilane, wherein said composition has been prepared by combining components B and C with component A in the absence of a dispersion medium.
    Type: Grant
    Filed: April 10, 1996
    Date of Patent: July 29, 1997
    Assignee: Hoechst Celanese Corporation
    Inventors: Vincent J. Sullivan, Andrew B. Auerbach
  • Patent number: 5648426
    Abstract: A method and composition for improving the impact resistance of thermoplastics is disclosed. An impact resistant thermoplastic is formed by forming a silicone containing thermosetting component, compounding it with a thermoplastic to form a silicone-thermoplastic mixture, disposing a catalyst on the mixture, and activating the catalyst while compounding the mixture with a thermoplastic. The silicone containing thermosetting component includes a first silicone compound containing hydride groups and a second silicone compound containing unsaturated groups. Activating the catalyst, preferably a platinum complex, causes the thermosetting component to cure, creating a silicone-thermoplastic semi-interpenetrating polymer network having higher impact resistance than the unmodified thermoplastic.
    Type: Grant
    Filed: May 5, 1995
    Date of Patent: July 15, 1997
    Assignee: Huls America Inc.
    Inventor: Mikhail Zolotnitsky