Diorgano Siloxane Contains Units Of -((r)si(r)-o-)* Where * Is Subscript Two Or More Patents (Class 524/731)
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Patent number: 5674936Abstract: A room temperature vulcanizable silicone composition having an application rate greater than 150 g/min. and good thixotropy comprises an alkyl alkoxy stopped diorganopolysiloxane, a polyalkoxysilane crosslinking agent, a tetra alkyl titanate condensation cure catalyst, and 1,3,5-tris(alkoxysilylalkyl)isocyanurate.Type: GrantFiled: July 30, 1996Date of Patent: October 7, 1997Assignee: General Electric CompanyInventor: Gary M. Lucas
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Patent number: 5670560Abstract: A process of making a pumpable, stable, polydiorganosiloxane-silica foundation mixture by mixing and heating a polydiorganosiloxane, a reinforcing silica filler, and a diol surface modifying agent at >50.degree. C. to <180.degree. C. using 0.05 to 0.5 parts by weight of the diol per one part by weight of the silica. The foundation mixture can be used to make RTV silicone sealant compositions which are non-sag.Type: GrantFiled: November 29, 1995Date of Patent: September 23, 1997Assignee: Dow Corning CorporationInventors: Loren Dale Lower, Sherwood Spells
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Patent number: 5668212Abstract: An aqueous organosiloxane liquid composition in a homogeneous state is disclosed, which contains (A) aqueous modified organosilicon compound having at least one polyether group as a side chain, (B) liquid organopolysiloxane, (C) a cross-linking agent, (D) a curing catalyst and, optionally, (E) a filler. This composition undergoes uniform curing, when exposed to the atmosphere of a temperature of up to 300.degree. C., to form a siloxane polymer composition in a form of a film, fibers, a composite structure, a composite sheet or a building material. The composition can also be used as a coating composition or varnish.Type: GrantFiled: July 17, 1996Date of Patent: September 16, 1997Assignee: Shizu NaitoInventor: Hiroyuki Naito
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Patent number: 5668225Abstract: 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: GrantFiled: December 30, 1996Date of Patent: September 16, 1997Assignee: Yazaki CorporationInventors: Kiyotaka Okazaki, Sinichi Kogure, Masahiro Kanda, Shiroh Kobayashi
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Patent number: 5665804Abstract: The viscosity of a solvent is modified by thickening the solvent with a silicone latex. A silicone latex having a plurality of crosslinked polysiloxane particles is first prepared by mixing the siloxane polymer, a surfactant, and water; emulsifying the mixture to a gel phase; diluting the emulsion with water; adding a cure package (i.e., a catalyst, a crosslinker, or both, or a self catalytic crosslinker); and then without removing the water from the latex and after the particles of siloxane polymer in the latex have been cured, mixing the latex and solvent to thicken the solvent, forming viscous liquids, gels, and pastes. These latex thickened solvent compositions have beneficial properties such as clarity, shelf stability, and ease of preparation; and therefore have wide areas of application, especially as additives in antiperspirants, deodorants, and other personal care applications.Type: GrantFiled: February 5, 1996Date of Patent: September 9, 1997Assignee: Dow Corning CorporationInventors: Michael Philip Louis Hill, Eric Jude Joffre, Linda Moy Madore
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Patent number: 5654052Abstract: A fuser member having as its outermost layer, a composite material comprising:a) a crosslinked, oxide filled, poly(dimethylsiloxane) which containsb) a non-crosslinked, non-reactive poly(dimethylsiloxane) oil having a viscosity of at least 25,000 CPS.Type: GrantFiled: June 7, 1995Date of Patent: August 5, 1997Assignee: Eastman Kodak CompanyInventors: Susan Ann Visser, Richard John Kosakowski, Jr., William Bernard Vreeland
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Patent number: 5654362Abstract: Silicone gels are made by reacting an .tbd.Si--H containing polysiloxane with an alpha, omega-diene. The reaction is conducted in the presence of a platinum catalyst and in the presence of a low molecular weight silicone oil. The reaction is continued until a gel is formed by crosslinking and addition of .tbd.Si--H across double bonds in the alpha, omega-diene. The silicone gel can then be crumbled into a silicone powder using mechanical force. When additional amounts of low molecular weight silicone oil are added to the gel, and the silicone oil and the gel are subjected to shear force, a silicone paste can be formed.Type: GrantFiled: March 20, 1996Date of Patent: August 5, 1997Assignee: Dow Corning CorporationInventors: William James Schulz, Jr., Shizhong Zhahg
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Patent number: 5633302Abstract: 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: GrantFiled: November 21, 1995Date of Patent: May 27, 1997Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hiroshi Adachi, Toshio Saruyama
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Patent number: 5623029Abstract: Compositions, preferably elastomeric compositions, comprise high refractive index polysiloxane-based cross-linked copolymers and high refractive index polymeric resin components. Such compositions, which have refractive indexes of at least about 1.46, preferably at least about 1.48, are useful in producing foldable intraocular lenses.Type: GrantFiled: June 7, 1995Date of Patent: April 22, 1997Assignee: AllerganInventor: Shih-Liang S. Yang
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Patent number: 5618880Abstract: The present invention provides a sealing component for connector waterproofing having an excellent heat resistance, low-temperature resistance and oil resistance which can be economically produced in a reduced molding time. A novel sealing component for connector waterproofing is provided, which comprises a vulcanized composition comprising at least (a) 100 parts by weight of an organopolysiloxane represented by the following average composition formula (I) containing at least two alkenyl groups per molecule and having a viscosity of at least 100,000 cs, (b) from 0.1 to 20 parts by weight of an organohydrogenpolysiloxane represented by the following average composition formula (II) containing at least two hydrogen atoms directly bonded to silicon atom per molecule, (c) from 5 to 500 parts by weight of a finely divided silica filler, (d) the catalytic amount of a platinum catalyst, (e) from 0.005 to 5 parts by weight of a sulfide compound represented by the following general formula (III), and (f) from 0.Type: GrantFiled: August 1, 1995Date of Patent: April 8, 1997Assignees: Yazaki Corporation, Shin-Etsu Chemical Co., Ltd.Inventors: Kiyotaka Okazaki, Masahiro Kanda
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Patent number: 5612438Abstract: Novel curable siloxane polymers having integral ultra-violet light absorbers are disclosed which are useful in preparing a variety of commercial silicone products requiring excellent resistance to loss of UV protection due to external forces.Type: GrantFiled: October 25, 1995Date of Patent: March 18, 1997Assignee: General Electric CompanyInventors: William J. Raleigh, Raymond J. Thimineur, James A. Campagna
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Patent number: 5607993Abstract: The present invention provides a bouncing putty with low density and other desirable properties. The density is preferably between 0.33 and 0.95 g/cc, preferably between about 0.5 and 0.75 g/cc and particularly preferably about 0.6 g/cc. Borosilicone rubber base is mixed with density-reducing filler, preferably in the form of thermoplastic microspheres. Addition of a thinning agent reduces stiffness and addition of a lubricating oil improves the handling characteristics. A moisture scavenger can be added to maintain the characteristics of the bouncing putty even if some moisture is absorbed during use. A polarity modifier such as glycerine can be added to soften the putty. If desired, a colorant can be added as well.Type: GrantFiled: February 28, 1994Date of Patent: March 4, 1997Assignee: North Coast Medical, Inc.Inventor: Michael Christy
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Patent number: 5605762Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an epoxidized ester (b). The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above. In another aspect of the invention, the invention provides methods of using the claimed compositions as well as the rigid cellular polyurethane SRIM articles resulting from such processes.Type: GrantFiled: May 24, 1995Date of Patent: February 25, 1997Assignee: BASF CorporationInventors: Richard P. Harrison, Bari W. Brown, Richard C. Rossio, Gladys M. Aviles, Edward M. Dexheimer, David Ho
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Patent number: 5605957Abstract: A silicone composition containing: (A) 100 parts by weight of organopolysiloxane; 0.1 to 50 parts by weight of thickening agent (C) 0.01 to 20 parts by weight of fluorine-containing surfactant; and (D) 0.1 to 20 parts by weight of volatile water-soluble solvent.Type: GrantFiled: June 10, 1994Date of Patent: February 25, 1997Assignee: Alps Electric Co., Ltd.Inventor: Yoshiro Yoshida
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Patent number: 5597853Abstract: A silicone rubber composition comprising an organopolysiloxane and a reinforcing silica filler can be improved in crepe hardening and shelf stability by blending a specific compound as a wetter.Type: GrantFiled: November 7, 1994Date of Patent: January 28, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kunio Itoh, Toshio Shinohara, Masaharu Takahashi
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Patent number: 5594061Abstract: A water based coating composition provides a stain resistant layer which adheres well to a substrate and is resistant to chemical attack by common household cleaning solvents such as isopropyl alcohol. The coating composition has a very low volatile organic compound content, thus providing an environmentally desirable alternative to organic solvent based coatings. The low volatile organic compound content of the composition substantially or completely eliminates the problems and expenses associated with solvent recovery for meeting chemical emission standards, and the potential for human exposure to solvent vapor is substantially eliminated or significantly reduced. The coating composition is aqueous based and incorporates a crosslinkable acrylic polymer latex, an amino resin crosslinking agent and a crosslinking catalyst. The polymer, crosslinking agent and catalyst are dispersed and/or solubilized in an aqueous medium.Type: GrantFiled: March 11, 1994Date of Patent: January 14, 1997Assignee: GenCorp Inc.Inventors: Satish C. Sharma, John P. Kovalchin, Raymond J. Weinert
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Patent number: 5594037Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an epoxidized ester (b). The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above. In another aspect of the invention, the invention provides methods of using the claimed compositions as well as the rigid cellular polyurethane SRIM articles resulting from such processes.Type: GrantFiled: May 24, 1995Date of Patent: January 14, 1997Assignee: BASF CorporationInventors: Richard P. Harrison, Bari W. Brown, Richard C. Rossio, Gladys M. Aviles, Edward M. Dexheimer, David Ho
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Patent number: 5594067Abstract: A method of manufacturing a water-based silicone type graft copolymer emulsion in which silicone (a macromonomer) having a radical polymerizable functional group and another vinyl monomer are, under presence of a surface active agent having a radical polymerizable functional group, emulsified and dispersed to a particle size of 0.5 .mu.m or less, and the temperature is raised to copolymerize the emulsified and dispersed material. In the macromonomer, a macromonomer with a silicone structural unit repetition number n of less than 20 is contained in a quantity of 5 to 80 wt %.Type: GrantFiled: May 23, 1994Date of Patent: January 14, 1997Assignee: Showa Highpolymer Co., Ltd.Inventors: Yukio Doi, Wei-Zhong Zhang, Masayoshi Kinugasa
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Patent number: 5587502Abstract: The present invention provides a moisture-curable alkoxysilane functional polyurethane prepared from a hydroxy functional alkoxysilane. The hydroxy functional alkoxysilane is a hydroxyalkylenecarbamoylalkylene-alkoxysilanes referred to as a "hydroxycarbamoylsilane". The alkoxysilane functional polyurethanes may be used in a variety of applications to provide, for example, moisture-curable adhesives, sealants, putties and the like.Type: GrantFiled: June 2, 1995Date of Patent: December 24, 1996Assignee: Minnesota Mining & Manufacturing CompanyInventors: Dean M. Moren, Ian R. Owen
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Patent number: 5585186Abstract: A coating composition which imparts anti-reflective and anti-fog properties to substrates coated therewith. The coating composition utilizes an inorganic metal oxide in combination with silane or a siloxane oligomer. The coating compositions are particularly useful in the manufacture of disposable surgical masks and face shields.Type: GrantFiled: December 12, 1994Date of Patent: December 17, 1996Assignee: Minnesota Mining and Manufacturing CompanyInventors: Matthew T. Scholz, George V. Tiers
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Patent number: 5583197Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an epoxidized ester (b). The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above. In another aspect of the invention, the invention provides methods of using the claimed compositions as well as the rigid cellular polyurethane SRIM articles resulting from such processes.Type: GrantFiled: May 24, 1995Date of Patent: December 10, 1996Assignee: BASF CorporationInventors: Richard P. Harrison, Bari W. Brown, Richard C. Rossio, Gladys M. Aviles, Edward M. Dexheimer, David Ho
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Patent number: 5580921Abstract: The present invention relates to storage-stable polysiloxane compositions which give permanently water-wettable elastomers. The polysiloxane compositions of the present invention which vulcanize to yield elastomers are useful as dental impression compositions.Type: GrantFiled: February 10, 1994Date of Patent: December 3, 1996Assignee: Wacker-Chemie GmbHInventors: Michael Stepp, Heinz Hefner, deceased, Peter Huber, Johann Mueller, Richard Schmidlkofer, Arnold Garhammer
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Patent number: 5569750Abstract: A room temperature vulcanizable silicone rubber composition with crack resistant properties with improvement during cure, comprising a silanol end-stopped diorganopolysiloxane polymer; a methyl tris-(methyl ethyl ketoximino)silane crosslinker, an aminohydrocarbyl substituted ketoximinosilane adhesion promoter; a reinforcing or non-reinforcing filler or filler mixture, and an optional catalyst and plasticizer. These compositions cure to elastic materials useful as caulking materials, adhesives, coatings and encapsulating materials for the construction and other industries.Type: GrantFiled: May 24, 1994Date of Patent: October 29, 1996Assignee: AlliedSignal Inc.Inventors: Jeffrey A. Knepper, Dale R. Flackett, Edward T. Asirvatham
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Patent number: 5567752Abstract: Silicon- and nitrogen-containing compositions prepared by the reaction of an aminoalkylsilane such as 3-aminopropyl- or 3-methylaminopropyltrimethoxysilane with a glycidoxyalkylsilane such as 3-glycidoxypropyltrimethoxysilane are useful as adhesion promoters in addition curable polyorganosiloxane compositions. The latter are illustrated by mixtures of vinyl-substituted polyorganosiloxanes and hydride polyorganosiloxanes, also containing at least one platinum group metal compound as a hydrosilylation catalyst.Type: GrantFiled: November 22, 1995Date of Patent: October 22, 1996Assignee: General Electric CompanyInventors: Judith Stein, Jeffrey H. Wengrovius, Paul R. Willey
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Patent number: 5563211Abstract: A composition curable to a silicone elastomer is prepared by mixing a triorganosiloxy endblocked polydimethylsiloxane fluid where the triorganosiloxy is dimethylvinylsiloxy or methylphenylvinylsiloxy, a reinforcing silica having a surface treated with organosiloxane groups which contain 0.05 to 0.32 percent by weight vinyl, a hydroxy end-terminated polydiethylsiloxane fluid, an organohydrogensiloxane fluid, a platinum catalyst, and optionally a platinum catalyst inhibitor. The triorganosiloxy endblocked polydimethylsiloxane fluid has a major peak molecular weight of 68,000 to 135,000, a dispersity index greater than 3.8, the lowest molecular weight species between 854 and 3146 and the highest molecular weight species between 174,000 and 370,000. These compositions are readily extrudable under low pressure, have improved pot-life, cure to high strength elastomers with a high durometer, and have improved mold release.Type: GrantFiled: October 16, 1995Date of Patent: October 8, 1996Assignee: Dow Corning CorporationInventors: Diane M. Kosal, Melanie J. Van der Veen
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Patent number: 5563210Abstract: Organosiloxane oligomers wherein at least a portion of the siloxane units contain a silicon-bonded phenyl or phenylalkyl radical are suitable diluents for organosiloxane/oxyalkylene copolymers when these copolymers are used as thixotropic agents in the crosslinking agent portion of multi-part moisture curable organosiloxane compositions.Type: GrantFiled: September 18, 1995Date of Patent: October 8, 1996Assignee: Dow Corning CorporationInventors: Joan M. Donatelli, Daniel F. McMahon, David R. Salverson
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Patent number: 5563197Abstract: A stable dispersion of a finely divided solid such as a pigment in an organosiloxane composition can be prepared as a homogeneous thixotropic liquid, paste or gel by blending the solid with a finely divided, partially treated silica, a specified class of liquid diorganosiloxane/oxyalkylene copolymers and, as a diluent, at least one liquid organosiloxane oligomer having a density lower than the density of the dispersed solid. The gels and pastes convert to flowable liquids when subjected to shearing forces.Type: GrantFiled: August 2, 1995Date of Patent: October 8, 1996Assignee: Dow Corning CorporationInventors: Joan M. Donatelli, Daniel F. McMahon
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Patent number: 5561176Abstract: A process for treating fillers, preferably precipitated silica, to improve the physical property profile of heat curable and room temperature vulcanizable silicone rubbers and a composition for room temperature vulcanizable rubbers comprising the silica filler treated by the process of the invention.Type: GrantFiled: September 7, 1995Date of Patent: October 1, 1996Assignee: General Electric CompanyInventors: Theresa A. Garafalo, Robert A. Smith
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Patent number: 5561184Abstract: A room temperature curable silicone composition, comprising (A) 100 parts by weight of an organopolysiloxane each of both ends of which has one hydroxyl group, (B) 0.2 to 40 parts by weight of at least one compound selected from the group consisting of hydrolyzable silanes having 2 to 4 hydrolyzable groups and their partial hydrolysis-condensation products, (C) 1 to 100 parts by weight of a modified diorganopolysiloxane of which both ends have at least one group selected from the group consisting of a hydrogen atom, a substituted monovalent hydrocarbon group and alkoxy group having 1 to 10 carbon atoms, an unsubstituted hydrocarbon group and alkoxy group having 1 to 10 carbon atoms, and a hydroxyl group and that has a silicon-bonded modifying group made up of a substituted or unsubstituted monovalent organic group with 6 or more carbon atoms, and (D) a filler and a cured product thereof. A cured product good in peeling properties can be obtained.Type: GrantFiled: May 20, 1994Date of Patent: October 1, 1996Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kei Miyoshi, Yoshifumi Harada
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Patent number: 5561191Abstract: Method for the production of a thermostable crosslinked PVC copolymer where the crosslinking is carried out in the presence of humidity and after processing of the polymer. The copolymer is a copolymer of vinyl chloride and 0.05-10 weight % of a vinyl containing alkoxysilane compound. Preferably methacryloxy-propyltrimethoxy-silane or methacryloxy-propyltriethoxysilane is used as comonomer. The crosslinking can be carried out independent of the type of stabilizer. A condensation catalyst and also an inhibitor can be used to prevent too early crosslinking.Type: GrantFiled: March 6, 1995Date of Patent: October 1, 1996Assignee: Norsk Hydro A.SInventors: Morten Lundquist, Jan O. Laundal
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Patent number: 5556914Abstract: This application is concerned with room temperature vulcanizing compositions useful as mould making materials which are formed by mixing an alpha, omega dihydroxy polysiloxane, a condensation polydimethylsiloxane, catalyst and a crosslinking agent which comprises a tri- or tetra-alkoxy silane or siloxane in which the alkoxy groups contain more than two carbon atoms. Moulds made with these materials on epoxy masters show improved usage; the improvement is related to the size of the alkoxy "leaving group" and the proportion of crosslinker and condensation catalyst.Type: GrantFiled: March 23, 1995Date of Patent: September 17, 1996Assignee: Dow Corning GmbHInventors: Andr e R. L. Colas, Edward A. Joseph
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Patent number: 5547608Abstract: The invention provides polyurethane components and compositions capable of providing internal mold release properties in SRIM applications. The polyol composition of the invention has an isocyanate reactive polyol (A) having a number average molecular weight from 100 to about 10,000 and an effective amount of internal mold release composition (B) having a silicon-containing polymer (a) and an epoxidized ester (b). The invention further provides an SRIM polyurethane composition useful in the preparation of molded polyurethane articles having internal mold release properties, the composition comprising an isocyanate component (I) and the isocyanate reactive polyol composition (component (II)) disclosed above. In another aspect of the invention, the invention provides methods of using the claimed compositions as well as the rigid cellular polyurethane SRIM articles resulting from such processes.Type: GrantFiled: September 9, 1994Date of Patent: August 20, 1996Assignee: BASF CorporationInventors: Richard P. Harrison, Bari W. Brown, Richard C. Rossio, Gladys M. Aviles, Edward M. Dexheimer, David Ho
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Patent number: 5545831Abstract: The present invention relates to a silicone composition comprising (A) a silicone release coating composition and (B) an organosilicon compound having the general formula ##STR1## where R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is an alkylene group, R.sup.3 is a hydrogen atom, an alkenyl group, or a hydroxyl group, m has a value of zero or greater, and n has a value of greater than zero which cures to form a release coating. The silicone release coating compositions of this invention give a cured release coating which exhibits optimal release values against lucky substances and which does not impair the residual adhesion of tacky substances.Type: GrantFiled: October 19, 1994Date of Patent: August 13, 1996Assignee: Dow Corning Toray Silicone Co., LTD.Inventors: Nobuo Kaiya, Hideki Kobayashi, Wataru Nishiumi
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Patent number: 5525660Abstract: An organopolysiloxane composition contains (A) a both end hydroxyl-blocked diorganopolysiloxane, (B) an inert diorganopolysiloxane, (C) a silane or siloxane having at least three hydrolyzable functional groups, (D) an organosilane having at least two alkoxy groups each attached to a silicon atom and one mercapto group separated from a silicon atom by an alkylene group or a partial hydrolyzate thereof, (E) an organosilane having at least two alkoxy groups each attached to a silicon atom and one amino group separated from a silicon atom by an alkylene group or a partial hydrolyzate thereof, (F) a condensation catalyst, and (G) a fine powder, typically of polycarbonate, having a mean particle size of 0.1-50 .mu.m. The composition is useful as a surface treating agent for cured rubber moldings for imparting non-tackiness, water repellency and lubricity to the rubber surface and forming a long-lasting abrasion resistant coating.Type: GrantFiled: December 6, 1994Date of Patent: June 11, 1996Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Mikio Shiono, Kazumi Okada
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Patent number: 5519104Abstract: A room temperature vulcanizing alkoxy curing silicone composition cured by a dual catalyst system comprising either (C.sub.4 H.sub.9)Sn(O.sub.2 CCH.sub.3)(O.sub.2 C(CH.sub.2).sub.10 CH.sub.3) or an approximately equimolar mixture of dibutyltin diacetate and dibutyltin dilaurate or mixtures thereof whereby tooling time is increased without deleterious effects upon cured performance properties.Type: GrantFiled: March 31, 1995Date of Patent: May 21, 1996Assignee: General Electric CompanyInventor: Gary M. Lucas
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Patent number: 5516823Abstract: Adhesion-promoting additives for use in curable organosiloxane compositions comprise 1) at least one organosiloxane comprising a) silicon bonded hydrogen atoms and/or ethylenically unsaturated substituents bonded to silicon through carbon and b) at least one silicon atom containing three hydrolyzable groups, and 2) at least one silane containing four alkoxy or enoloxy groups or three of these groups and a hydrocarbon radical containing an epoxy or ethylenically unsaturated group as a substituent.Type: GrantFiled: May 10, 1994Date of Patent: May 14, 1996Assignee: Dow Corning CorporationInventors: Theresa E. Gentle, Michael A. Lutz
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Patent number: 5516838Abstract: To a silicone composition comprising (A) an organopolysiloxane having at least two alkenyl groups in a molecule, (B) an organohydrogenpolysiloxane having at least two hydrogen atoms each directly attached to a silicon atom in a molecule, and (C) a platinum catalyst, (D) a compound having a phenyl group and a secondary or tertiary amino group directly attached thereto is added to render the composition flame retardant. The composition cures into a transparent product having improved flame retardancy meeting the UL standard and is suitable for use in the protection of electronic parts like ICs and hybrid ICs.Type: GrantFiled: August 17, 1995Date of Patent: May 14, 1996Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hironao Fujiki, Masayuki Ikeno, Hiroyasu Hara, Kazuyasu Satoh
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Patent number: 5516812Abstract: A radiation and moisture curable silicone conformal coating composition comprises a silicone fluid of a monovalent ethylenically unsaturated functional group endcapped silicone and at least one (meth)acryl-functionalized silicone; and a photoinitiator effective for radiation curing of the silicone composition. The encapped silicone is the product of a reaction between a silanol terminated silicone and a silane cross linker having joined directly to a silicon atom thereof a monovalent ethylenically unsaturated functional group and at least 2 hydrolyzable groups.Type: GrantFiled: August 1, 1994Date of Patent: May 14, 1996Assignee: Loctite CorporationInventors: Hsien K. Chu, Robert P. Cross, Lester D. Bennington
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Patent number: 5512376Abstract: A reactive component, which is curable to form a nonpolar polymer containing silicon and carbon atoms, and having a glass transition temperature of at least 20.degree. C., is mixed with an antiplasticizer. The resulting mixture, a curable composition, is cured to form a composition having an increased modulus. The reactive component preferably comprises a polyene having at least two hydrosilation reactive carbon-carbon double bonds (e.g., dicyclopentadiene), and a silicon compound having at least two hydrosilation reactive .ident.SiH groups. Preferably the silicon compound comprising at least one member selected from the group consisting of cyclic polysiloxanes, tetrahedral siloxysilanes, and linear polysiloxanes. Preferably the resulting cured composition is crosslinked, due to at least one member selected from the group consisting of the polyene and the silicon compound having more than two hydrosilation reactive sites. Preferably the curable composition further comprises a hydrosilation catalyst.Type: GrantFiled: June 20, 1994Date of Patent: April 30, 1996Assignee: Hercules IncorporatedInventors: Richard L. Brady, Samuel A. Thompson
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Patent number: 5506302Abstract: An organopolysiloxane composition contains (A) a both end hydroxyl-blocked diorganopoly-siloxane, (B) a hydroxyl-free diorganopoly-siloxane having a degree of polymerization equal to or greater than that of (A), (C) an organo-hydrogenpolysiloxane having at least three hydrogen atoms in a molecule, (D) an organosilane containing at least two alkoxy groups and an amino group attached to a silicon atom through an alkylene group in a molecule and/or a partial hydrolyzate thereof, (E) a fatty acid metal salt, (F) polycarbonate powder having a mean particle size of up to 50 .mu.m, and optionally (G) an organo-silane containing at least two alkoxy groups and a mercapto group attached to a silicon atom through an alkylene group in a molecule and/or a partial hydrolyzate thereof. It is applied to a rubber substrate to form a wear resistance coating thereon.Type: GrantFiled: June 21, 1995Date of Patent: April 9, 1996Assignee: Shin-Etsu Chemical Co., Inc.Inventors: Mikio Shiono, Kazumi Okada, Hironao Fujiki
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Patent number: 5486565Abstract: The present invention relates to organosiloxane compositions that are reaction products of 1) a silane containing at least 3 hydrolyzable groups per molecule, 2) a monohydric or polyhydric alcohol containing at least one organofunctional group and 3) a polyhydric alcohol containing no organofunctional groups or ethylenic unsaturation, wherein said reaction products contain at least two silicon atoms. The organosiloxane compositions are particularly useful as adhesion promoting additives for curable organosiloxane compositions, particularly those that cure by a platinum group metal-catalyzed hydrosilation reaction.Type: GrantFiled: December 2, 1994Date of Patent: January 23, 1996Assignee: Dow Corning CorporationInventors: Theresa E. Gentle, Michael A. Lutz
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Patent number: 5486566Abstract: A gel suitable for use in various personal care applications is provided. The improved gel contains an amide-free gelator; a siloxane polyether for strengthening the gel, and increasing its firmness, rigidity, and adhesion to substrates; and a volatile methyl siloxane. Preferably, the gel includes 1 to 98.9 percent by weight of the siloxane polyether; 0.1 to 20 percent by weight of 12-hydroxystearic acid or metal salts of 12-hydroxystearic acid; and 1 to 98.9 percent by weight of a volatile methyl siloxane having a boiling point less than two hundred-fifty degrees Centigrade and a viscosity of 0.65 to about 5.0 centistoke (mm.sup.2 /s).Type: GrantFiled: September 23, 1994Date of Patent: January 23, 1996Assignee: Dow Corning CorporationInventor: Dimitris E. Katsoulis
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Patent number: 5475076Abstract: The invention relates to organo(poly)siloxane compositions which have long shelf life in the absence of water, but can be crosslinked in the presence of water, even at room temperature, to give elastomers with elimination of alcohols, and to a process for the preparation of such compositions.Type: GrantFiled: July 29, 1994Date of Patent: December 12, 1995Assignee: Wacker-Chemie GmbHInventors: Rudolf Braun, Petra Absmaier
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Patent number: 5468794Abstract: Room temperature vulcanizable platinum group metal catalyzed silicone compositions are provided which utilize an N-heterocyclic adhesion promoter, such as 2,6 bis(trimethoxysilyltrimethyleneoxy)pyridine. Cohesive bonding is effected on various substrates.Type: GrantFiled: September 13, 1994Date of Patent: November 21, 1995Assignee: General Electric CompanyInventors: Judith Stein, Mark W. Davis
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Patent number: 5468805Abstract: The introduction of a room-temperature-curable organopolysiloxane composition that exhibits tack during the course of its cure and that forms a cured product strongly adherent to a variety of substrates when cured while in contact with substrate. Also, the introduction of a method for the preparation of this room-temperature-curable organopolysiloxane composition.Type: GrantFiled: April 21, 1994Date of Patent: November 21, 1995Assignee: Dow Corning Toray Silicon Co., Ltd.Inventor: Masayuki Onishi
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Patent number: 5457148Abstract: A one part room temperature vulcanizable silicone rubber composition and process for the manufacture thereof having a good application rate and good thixotropy comprises a polyalkoxy terminated polydimethylsiloxane and a low viscosity silanol stopped polydimethylsiloxane.Type: GrantFiled: April 15, 1994Date of Patent: October 10, 1995Assignee: General Electric CompanyInventor: Gary M. Lucas
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Patent number: 5451633Abstract: The heterogeneous polymerization of water-insoluble polymer in CO.sub.2 is disclosed. The method comprises providing a heterogeneous reaction mixture comprising CO.sub.2, a monomer, and a surfactant, then polymerizing the monomer to form a water-insoluble polymer.Type: GrantFiled: September 1, 1994Date of Patent: September 19, 1995Assignee: The University of North Carolina at Chapel HillInventors: Joseph M. DeSimone, Elise E. Maury, James R. Combes, Yusuf Z. Menceloglu
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Patent number: 5447987Abstract: Organopolysiloxane compositions of the present invention are the curable compositions of the addition curable type, which comprise (A) an organopolysiloxane having aliphatic unsaturated groups, (B) an organohydrogen polysiloxane having SiH groups, (C) a fluorine containing organopolysiloxane expressed by the following general chemical formula (1): ##STR1## wherein R.sup.1, R.sup.2, R.sup.4 through R.sup.6, and R.sup.8 are monovalent hydrocarbon groups such as alkyl groups, R.sup.3 and R.sup.7 are bivalent hydrocarbon groups, such as alkylene groups, Rf is either a perfluoroalkyl group or a perfluoroalkyl ether group, subscripts k, p, and m are integers of at least 1, and the subscript n is an integer of at least 0, and (D) a platinum group metallic catalyst. The cured products obtained from the compositions of the present invention exhibit a superior adhesiveness towards substances to be adhered, such as glass, aluminum, iron and epoxy resins.Type: GrantFiled: December 23, 1994Date of Patent: September 5, 1995Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Shinichi Sato, Takashi Matsuda, Kenichi Fukuda, Tomofumi Sutou
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Patent number: 5432218Abstract: The introduction of a room-temperature-curable organopolysiloxane composition that cures at room temperature to give a rubber whose surface is easily coated with paint and from which the resulting paint film does not delaminate readily and that after curing is free from staining of the surface of the rubber and any substrates in contact with the rubber.Type: GrantFiled: May 20, 1994Date of Patent: July 11, 1995Assignee: Dow Corning Toray Silicon Co., Ltd.Inventors: Ryuzo Mikami, Hisataka Nakashima, Tadashi Okawa, Shigeki Sugiyama
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Patent number: 5428092Abstract: The release agent compositions of the present invention comprise mixtures of amino-functional and amine-free polydimethylsiloxanes wherein the viscosity, amine equivalent and content of dimethylsiloxane oligomers containing up to 20 silicon atoms are within specified limits. The compositions do not evolve oily volatiles or silicon dioxide powder even during exposure to elevated temperatures.Type: GrantFiled: February 14, 1994Date of Patent: June 27, 1995Assignee: Dow Corning Toray Silicon Co., Ltd.Inventors: Hiroki Ishikawa, Tsutomu Naganawa, Isao Ona