Poly (di Organo Siloxane) Reactant Has At Least One Sio Other Than As Si-o Si, E.g., Si-o-c, Or Sioh Group, Etc. Patents (Class 524/863)
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Patent number: 5213899Abstract: Room temperature vulcanizable, scavenger-reduced, organopolysiloxane compositions having improved application rate amd thixotropy properties are provided, comprising a mixture comprising (A) the reaction product of a polyalkoxy-terminated organopolysiloxane, silica filler, and a cyano-functional polyalkoxy silane; (B) a tin condensation catalyst; and (C) a scavenger for hydroxy groups. In preferred embodiments, the RTV composition further comprises a crosslinking polyalkoxy silane and an adhesion promoting polyalkoxysilane.Type: GrantFiled: December 17, 1990Date of Patent: May 25, 1993Assignee: General Electric CompanyInventor: Gary M. Lucas
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Patent number: 5210131Abstract: A method of making organopolysiloxanes comprises contacting organosilicon compounds having at least one unit ##EQU1## wherein R.degree. is hydrogen, hydroxyl, a C.sub.1-18 hydrocarbon, substituted hydrocarbon or hydrocarbonoxy group and a has a value of from 0 to 4 with a phosphonitrile halide AB, wherein A is a phosphonitrile halide cation [X(PX.sub.2 .dbd.N).sub.n PX.sub.3 ].sup.+, wherein X is halide and n is from 1 to 8 and B is an anion derived from a Lewis acid not containing a P atom, e.g. [MX.sub.(v-t+1) R.sup.2 .sub.t ].sup.-. The method is particularly useful for condensation of silanol end-blocked siloxanes.Type: GrantFiled: February 6, 1992Date of Patent: May 11, 1993Assignee: Dow Corning S.A.Inventors: Jean-Marc Gilson, Jean de la Croi Habimana
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Patent number: 5200440Abstract: An organosilicone-treated silica obtained by treating(A) a silica powder having a specific surface area of at least 50 m.sup.2 /g with(B) a triorgano(1-alkoxyvinyloxy)silane having the formula (I): ##STR1## wherein R.sup.1 is a monovalent hydrocarbon group or an ether linkage-containing organic group, and R.sup.2 are each a substituted or unsubstituted monovalent hydrocarbon group or an ether linkage-containing organic group. The invention also discloses an organopolysiloxane composition containing the organosilicone-treated silica and a process preparing the composition. The organosilicone-treated silica is of high quality, containing no substance with disagreeable smell or corrosiveness which has been by-produced heretofore. Hence, the composition containing the silica is free from pseudocrosslinking such as structuring or crepe hardening.Type: GrantFiled: October 31, 1990Date of Patent: April 6, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Toshio Takago, Hiroshi Inomata, Shinichi Sato, Hitoshi Kinami
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Patent number: 5196477Abstract: Silicone compositions comprising an organopolysiloxane composition and an organic compound capable of coordination with metals are described. Since the organic compound is preferentially adsorbed on a metal surface, the composition is particularly suitable for use in electric or electronic parts to prevent contact failure. A more specific embodiment comprises a diorganopolysiloxane of the average unit formula, R.sub.a SiO.sub.(4-a)/2, wherein each R independently represents an unsubstituted or substituted monovalent hydrocarbon group, and a is a value of from 1.90 to 2.05, a filler, an alkoxysilane or its hydrolyzate, a silylation catalyst made of an organic silicon compound having at least one specific type of group, an organic tin compound, another organosilicon compound capable of reaction with an alcohol in order to stabilize the composition, and an organic compound capable of coordination with metals.Type: GrantFiled: July 24, 1990Date of Patent: March 23, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masatoshi Arai, Yoshifumi Inoue, Kei Miyoshi
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Patent number: 5179159Abstract: A silicone rubber composition comprises, as the base component thereof, a diorganopolysiloxane having the following general formula: ##STR1## wherein Rf is a perfluoroalkyl group or a perfluoroalkyl ether group, X is hydrogen, (CH.sub.3).sub.3 Si--, or (CH.sub.2 .dbd.CH)(CH.sub.3).sub.2 Si--, l and m are each an integer of 1 or above, and n is an integer of 0 or above. The silicone rubber composition has excellent resistance not only to nonpolar solvents such as benzene but also to polar solvents such as ketones, esters, etc.Type: GrantFiled: May 21, 1991Date of Patent: January 12, 1993Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hirofumi Kishita, Shinichi Sato, Noriyuki Koike
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Patent number: 5176960Abstract: A hydrophobic silica is prepared by mixing and heating a mixture of (a) 100 weight parts wet-method silica and (b) 1 to 100 weight parts organopolysiloxane represented by the following average unit formula R.sup.1.sub.a R.sup.2.sub.b SiO.sub.(4-a-b)/2, wherein R.sup.1 is a monovalent hydrocarbon group, R.sup.2 is the hydrogen atom, a is from 1 to 3 inclusive, and b is from zero to 1 inclusive, with the provisos that a+b is from 1.90 to 2.10 inclusive and b/(a+b) is from zero to 0.45 inclusive. This hydrophobic silica is used to prepare a high-strength silicone rubber particulate by mixing with a curable dioranopolysiloxane and curing the mixture in the form of particulates. A preferred manner of making the particulates is by emulsifying the mixture of hydrophobic silica and curable diorganopolysiloxane in water, then spraying the emulsion into a hot gas to cure the silicone rubber composition and remove the water, giving microparticles of high-strength silicone rubber.Type: GrantFiled: October 25, 1991Date of Patent: January 5, 1993Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Koji Shimizu, Keiji Yoshida
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Patent number: 5162429Abstract: An improved aqueous silicone emulsion which cures to a reinforced elastomer upon removal of water is obtained through the use of an anionic, stable dispersion of fumed silica in water as the source of reinforcing silica. The fumed silica dispersion is combined with an aqueous, anionic emulsion of crosslinkable polydiorganosiloxane and a crosslinking system.Type: GrantFiled: April 5, 1991Date of Patent: November 10, 1992Assignee: Dow Corning CorporationInventors: Stephanie A. Burns, Donald T. Liles, Christine J. Schoenherr
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Patent number: 5126072Abstract: An emulsion where water is a continuous phase and having a discontinuous oil phase comprising:(a) silicon hydrides containing units of the formula:R.sub.a H.sub.b SiO.sub.(4-a-b)/2where a may be 0, 1, or 2; b may be 1 or 2; a+b may be 1, 2, or 3; R is a substituted or unsubstituted hydrocarbon radical of 1 to 12 carbon atoms; and(b) hydroxy substituted silicone containing units of the formula:R.sub.c (OH).sub.d SiO.sub.(4-c-d)/2wherein c is 1, 2, or 3; d is 1 or 2; c+d may be 2, 3, or 4; and R is a substituted or unsubstituted hydrocarbon radical of from 1 to 12 carbon atoms.Type: GrantFiled: August 24, 1989Date of Patent: June 30, 1992Assignee: General Electric CompanyInventor: Frank J. Traver
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Patent number: 5118738Abstract: The specification describes and claims filled compositions, e.g. moisture curable sealant compositions which comprise 100 parts by weight of polymeric material comprising a mixture and/or a reaction product of a polydiorganosiloxane having silicon-bonded hydroxyl groups with a compound containing silicon-bonded alkoxy or alkoxyalkoxy groups, 50 to 200 parts by weight of finely divided filler and an additive which is a reaction product of an organic amine, an oxide, hydroxide, carbonate, bicarbonate or a mixture thereof with a sulphonic acid of the formula RSO.sub.3 H in which R represents a hydrocarbon group which may be halogenated. The additive is preferably a reaction product of the sulphonic acid and an oxide, hydroxide, carbonate or bicarbonate of magnesium, or calcium and the acid is preferably one in which R represents a group R'C.sub.6 H.sub.4 wherein R' represents an alkyl group having 6 to 18 carbon atoms, for example dodecylbenzenesulphonic acid.Type: GrantFiled: April 20, 1990Date of Patent: June 2, 1992Assignee: Dow Corning S.A.Inventors: Michelle M. N. C. Berthet, Brian R. Trego, Hans-Juergen Wessely
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Patent number: 5089537Abstract: A silicone emulsion is prepared by emulsion polymerizing a hydroxyl endblocked polydiorganosiloxane oligomer with a combination of a siloxane or siloxane precursor containing unsaturated hydrocarbon groups and a functional silicone selected from the group consisting of organosilicon hydrides and mercaptoalkylsilanes or siloxanes, or with an acryl or methacryl functional siloxane. When the emulsion of the copolymer produced is combined with a photoinitiator, the copolymer can be crosslinked by exposure to ultraviolet radiation. When the water is removed, an elastomer results. The emulsion can be used to produce coatings and sealants.Type: GrantFiled: May 22, 1989Date of Patent: February 18, 1992Assignee: Dow Corning CorporationInventor: Donald T. Liles
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Patent number: 5087684Abstract: Novel organopolysiloxane compositions that are storage-stable in the absence of moisture, but curable into elastomeric state in the presence of moisture, nonetheless devoid of any organometallic curing catalyst, include (A) an .alpha.,.omega.-dihydroxydiorganopolysiloxane oil, (B) a ketiminoxysilane crosslinking agent, (C) inorganic filler material, (D) an organofunctional silane and (E) a substituted hydroxylamine; the crosslinked elastomers produced from these organopolysiloxane compositions are well adopted for such applications as foodstuff packaging, medical bandaging and antifouling/antisoiling coatings.Type: GrantFiled: February 27, 1991Date of Patent: February 11, 1992Assignee: Rhone-Poulenc ChimieInventor: Patrice Perrin
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Patent number: 5073586Abstract: The specification discloses a curable composition comprising 100 parts by weight of polysiloxane, 50 to 200 parts by weight of finely divided filler having an average particle size greater than 0.05 micron and not less than 0.5 parts by weight per 100 parts by weight of the filler of an additive which is a reaction product of an organic amine, or an oxide, hydroxide, carbonate, or bicarbonate or a mixture thereof with a sulphonic acid of the formula RSO.sub.3 H in which R represents a hydrocarbon group which may have halogen or amino substituents and which contains not less than six carbon atoms. Preferred additives are reaction products of the sulphonic acid and an oxide, hydroxide, carbonate or bicarbonate of sodium, magnesium, zinc, calcium, barium, aluminium or a mixture thereof. The group R of the sulphonic acid may be R'C.sub.6 H.sub.4 where R' represents an alkyl group having 6 to 18 carbon atoms and a preferred acid is dodecylbenzenesulphonic acid.Type: GrantFiled: April 20, 1990Date of Patent: December 17, 1991Assignee: Dow Corning S.A.Inventors: Michelle M. N. C. Berthet, Brian R. Trego, Hans-Juergen Wessely
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Patent number: 5061739Abstract: A room temperature curing composition comprising:(A) a silanol-terminated polydiorganosiloxane;(B) a hydrolyzable silyl-terminated polymer obtained by reacting:(a) an epoxy-terminated polyether;(b)(i) an heterocyclic compound containing imino groups, and/or;(ii) an aromatic compound or a heterocyclic compound containing mercapto groups; and,(c) an organosilicon compound containing an epoxy group and a hydrolyzable group;(C) an inorganic filler; and,(D) a curing catalyst.Type: GrantFiled: November 13, 1989Date of Patent: October 29, 1991Assignee: Toshiba Silicone Co., Ltd.Inventor: Chiyuki Shimizu
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Patent number: 5034455Abstract: Curable silicone caulk compositions are provided using a nonionically stabilized silanol-terminated polydiorganosiloxane, water, a silane cross-linker, a tin condensation catalyst, and calcium carbonate.Type: GrantFiled: October 3, 1989Date of Patent: July 23, 1991Assignee: General Electric CompanyInventors: Judith Stein, Tracey M. Leonard
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Patent number: 5013781Abstract: A gasket and packing material which exhibits excellent adhesiveness to substrates and resistances to degradation of properties when exposed to hot hydrocarbon oils and coolants such as used in an automobile radiator are made by curing a composition which contains polydimethylsiloxane, an organopolysiloxane having R'.sub.3 SiO.sub.0.5 and SiO.sub.2 units or R'.sub.3 SiO.sub.0.5, R'.sub.2 SiO, and SiO.sub.2 units, an inorganic filler, an alkoxysilane adhesion promoter, and a ketoxime silicon compound crosslinker.Type: GrantFiled: August 13, 1987Date of Patent: May 7, 1991Assignee: Dow Corning Toray Silicone Company, Ltd.Inventors: Taro Koshii, Tetsuo Amemiya
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Patent number: 4973623Abstract: A room temperature curing composition which cures fast and has good reversion resistance and good package stability is a mixture of 66.75 to 89.4 weight percent of a hydroxyl endblocked polydiorganosiloxane; 5.5 to 10 weight percent of a tetrafunctional ethoxy-ketoximo silane mixture having 6 to 27 weight perent tetraketoximosilane, 9 to 39 weight percent of monoethoxytriketoximosilane, 38 to 60 weight percent of diethoxydiketoximosilane, and 5.5 to 25 weight percent triethoxymonoketoximosilane; 0.1 to 0.25 weight percent of a tin catalyst, 0 to 3 weight percent of an adhesion promoter, and 5 to 20 weight percent of reinforcing silica. These compositions cure to elastomeric materials useful as caulking materials, adhesives, coatings and encapsulating materials for construction and automotive industries.Type: GrantFiled: May 26, 1989Date of Patent: November 27, 1990Assignee: Dow Corning CorporationInventors: Michael H. Haugsby, Loren D. Lower
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Patent number: 4956436Abstract: Organopolysiloxane compositions curable into elastomeric state, whether in single- or two-component form, comprise an .alpha.,.omega.-dihydroxypolydiorganopolysiloxane oil, a crosslinking agent therefor, optionally, inorganic fillers and an adhesion promoter, and a catalytically effective amount of a pentacoordinated tin monochelate produced by reacting a .beta.-dicarbonyl compound with an organotin salt.Type: GrantFiled: June 27, 1988Date of Patent: September 11, 1990Assignee: Rhone-Poulenc ChimieInventors: Michel Letoffe, Claude Millet, Serge Serafini
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Patent number: 4929702Abstract: Organopolysiloxane compositions curable into elastomeric state, whether in single- or two-component form, comprise an .alpha., .omega.-dihydroxypolydiorganopolysiloxane oil, a crosslinking agent therefor, optionally, inorganic fillers and an adhesion promoter, and a catalytically effective amount of a pentacoordinated tin monochelate produced by reacting a tin bischelate with an organic carboxylic acid.Type: GrantFiled: June 27, 1988Date of Patent: May 29, 1990Assignee: Rhone-Poulenc ChimieInventors: Jacques Cavezzan, Jean-Marc Frances, Pierre Lancelin
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Patent number: 4925895Abstract: A silicone composition curable to a heat stabilized silicone elastomer comprising at least one polyorganosiloxane having the formula: ##STR1## where R is hydrogen or substituted or unsubstituted alkyl, alkenyl or aryl having less than 19 carbon atoms, each of A and D may be any of methyl, hydroxy or vinyl groups,0<m/n.ltoreq.1 and m+n>350,a complex comprising a transition metal salt of at least one polydentate chelating ligand having the formula: ##STR2## where each R.sub.1 may be an alkyl biradical having 1 to 6 carbon atoms or an aryl biradical having less than 19 carbon atoms R.sub.1, is an X' substituted R.sub.1, each of Z and E may be any of carboxy thiocarboxy, dithiocarboxy, or --N(R.sub.2).sub.2, --As(R.sub.2).sub.2, --S(R.sub.2) where each R.sub.2 may be any of hydrogen or an alkyl radical having 1 to 6 carbon atoms or any aryl radical having less than 19 carbon atoms, X' may be any of hydrogen, carboxy, thiocarboxy, dithiocarboxy, --N(R.sub.2).sub.2, --A.sub.s (R.sub.2).sub.2, or --S(R.sub.Type: GrantFiled: May 12, 1988Date of Patent: May 15, 1990Assignee: Xerox CorporationInventors: George J. Heeks, Arnold W. Henry, Edward L. Schlueter, Jr.
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Patent number: 4900778Abstract: The invention relates to a coating liquid composition useful to form a hard and transparent coating film on plastics. The novel liquid composition comprises a partial polycondensation product of a trialkoxysilane R.sup.1 Si(OR.sup.2).sub.3, wherein R.sup.1 is a C.sub.1 or C.sub.2 alkyl group and R.sup.2 is a C.sub.1 -C.sub.3 alkyl group, a colloidal silica, water, an aliphatic lower alcohol and anhydride of a polybasic carboxylic acid having a cyclic structure. The content of the acid anhydride must be at least 0.005 wt % when pH of the coating liquid composition is adjusted to 6.0-7.0. The primary merit of using such an acid anhydride is improved storage stability of the coating liquid composition.Type: GrantFiled: March 24, 1987Date of Patent: February 13, 1990Assignee: Central Glass Company, LimitedInventor: Toshikazu Nagashima
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Patent number: 4892907Abstract: Room temperature vulcanizing elastomers are provided which comprise 100 parts of an .alpha.,.omega.-bis(hydroxy)dimethylpolysiloxane polymer, 2 to 20 parts of methyl triacetoxysilane and an amount of a hardening accelerator comprising a water-in-oil emulsion of water in a liquid organosilicon polymer stabilized with an organosilicon surfactant such that the water comprises at least 0.01% by weight of the total mixture.Type: GrantFiled: December 8, 1988Date of Patent: January 9, 1990Assignee: General Electric CompanyInventors: Warren R. Lampe, Frank J. Traver
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Patent number: 4891402Abstract: Organic silicon-nitrogen compositions are prepared by the reaction of approximately equimolar amounts of a glycidoxyalkyltrialkoxysilane and a primary amine such as isobutylamine. They are useful as adhesion promoters in room temperature vulcanizable compositions comprising polyalkoxysilyl-terminated polydiorganosiloxanes.Type: GrantFiled: May 9, 1988Date of Patent: January 2, 1990Assignee: General Electric CompanyInventors: Jeffrey H. Wengrovius, Virginia M. VanValkenburgh, Steven J. Valenty
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Patent number: 4888380Abstract: A process for producing a silicone sealant which is stable in the absence of moisture and having a slump of less than 1 inch mixes a polydiorganosiloxane polymer having hydroxyl or alkoxysilethylene endblocking, an alkoxysilane crosslinker, and a titanium catalyst; then adds a reinforcing filler.Type: GrantFiled: September 26, 1988Date of Patent: December 19, 1989Assignee: Dow Corning CorporationInventors: Russell P. Kamis, Jerome M. Klosowski, Loren D. Lower
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Patent number: 4888382Abstract: Curable silicon caulking compositions are provided having improved shelf stability as a result of the use of a neopentyl orthosilicate.Type: GrantFiled: May 31, 1988Date of Patent: December 19, 1989Assignee: General Electric CompanyInventors: Judith Stein, Tracey M. Leonard
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Patent number: 4880861Abstract: A coating composition comprising:(A) 100 parts by weight of a vinyl polymer having on the main polymer chain end or a side chain thereof at least one silyl group containing a silicon atom to which a hydrolyzable group is linked, per one polymer molecule, the main chain of the vinyl polymer consisting essentially of a polymer of a vinyl monomer,(B) 0 to 10 parts by weight of a curing catalyst,(C) 0 to 10 parts by weight of a hydrolyzable ester compound, and(D) 0.5 to 100 parts by weight of a dialkyl ester of dibasic acid having the formula (1): ##STR1## The coating composition of the present invention has excellent adhesion to under coats, and therefore it is suitable for use of automotive refinishing paints and industrial coatings.Type: GrantFiled: March 8, 1989Date of Patent: November 14, 1989Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Shoichi Matsumura, Toshiro Nanbu, Hisao Furukawa
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Patent number: 4877828Abstract: Certain bissilyl ureas have been found useful as adhesion promoters for silicone latex compositions. Self-bonding silicone elastomers are provided which exhibit enhanced adhesion to a variety of substrates.Type: GrantFiled: May 31, 1988Date of Patent: October 31, 1989Assignee: General Electric CompanyInventors: Judith Stein, Tracey M. Leonard
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Patent number: 4857582Abstract: Colloidal suspensions of organopolysiloxanes are prepared by mixing an organosilicon compound selected from the group consisting of mixtures of alkoxysilanes and/or partial hydrolysates thereof and an organo(poly)siloxane which is optionally free of alkoxy groups and contains a maximum of 8 siloxane units, which is mixed with at least one alkoxysilane and/or a partial hydrolysate thereof, with water in the presence of an emulsifier, at a maximum rate of 5 moles of organosilicon compound per hour per liter of water, in which the organosilicon compound and the water is fed continuously, but separately from one another, into a reactor, in which at least one of the two substances contains an emulsifier, while the alkanol is being continuously removed by distillation from the aqueous suspension continuously emerging from the reactor. The aqueous suspension from which the alkanol has been removed by distillation is, if desired, recycled back into the reactor.Type: GrantFiled: May 18, 1988Date of Patent: August 15, 1989Assignee: Wacker-Chemie GmbHInventors: Matthias Wolfgruber, Bernward Deubzer, Volker Frey
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Patent number: 4826904Abstract: A coating composition comprising:(A) 100 parts by weight of a vinyl polymer having on the main polymer chain end or a side chain thereof at least one silyl group containing a silicon atom to which a hydrolyzable group is linked, per one polymer molecule, the main chain of the vinyl polymer consisting essentially of a polymer of a vinyl monomer,(B) 0 to 10 parts by weight of a curing catalyst,(C) 0 to 10 parts by weight of a hydrolyzable ester compound, and(D) 0.5 to 100 parts by weight of a dialkyl ester of dibasic acid having the formula (1): ##STR1## The coating composition of the present invention has excellent adhesion to under coats, and therefore it is suitable for use as automotive refinishing paints and industrial coatings.Type: GrantFiled: November 23, 1987Date of Patent: May 2, 1989Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Shoichi Matsumura, Toshiro Nanbu, Hisao Furukawa
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Patent number: 4769412Abstract: A room temperature-curable silicone rubber composition having improved heat-resistance is disclosed. The composition is formulated without any siliceous fillers as a reinforcing inorganic filler conventionally used in silicone compositions and, instead, comprises carbon black as a reinforcing filler. Namely, the composition comrises a major amount of a hydroxy-containing organopolysiloxane admixed with a minor amount of an organosilicon compound having at least two hydrolyzable groups per molecule, a curing catalyst, carbon black and iron oxide.Type: GrantFiled: November 12, 1986Date of Patent: September 6, 1988Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshio Inoue, Masatoshi Arai, Kazuyuki Suzuki
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Patent number: 4749740Abstract: Foam control compositions are prepared by reacting a mixture of components which include a polyorganosiloxane fluid bearing one or more hydroxyl and/or hydrocarbonoxy groups, a resinous siloxane or a silicone resin-producing silicon compound, a finely divided filler material and a catalyst to promote the reaction of the listed components. The compositions can optionally contain a polyorganosiloxane fluid which is substantially free of reactive groups and/or a polyorganosiloxane fluid bearing two or more hydroxyl and/or hydrocarbonoxy groups.Type: GrantFiled: November 14, 1986Date of Patent: June 7, 1988Assignee: Dow Corning Kabushiki KaishaInventors: Koichi Aizawa, Shingo Sewa, Hideki Nakahara
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Patent number: 4719251Abstract: An aqueous silicone emulsion useful in forming a fire barrier consists essentially of a mixture of anionically stabilized silicone emulsion, expanded vermiculite, and fiber selected from the group consisting of ceramic fiber and aramid fiber. The trowelable composition is applied to fill cracks or openings in fire walls to seal the wall and then allowed to dry. The dried material seals the opening it occupies. Upon exposure to fire, the dried material forms a char on its surface which protects the material under the surface and maintains a seal in the wall.Type: GrantFiled: August 19, 1985Date of Patent: January 12, 1988Assignee: Dow Corning CorporationInventors: John E. Dietlein, Jack R. Harper
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Patent number: 4695603Abstract: The room temperature curable silicone rubber composition of the invention is outstandingly free from the problem of surface stain when a cured elastomer thereof used, for example, in building works is prolongedly exposed to the atmosphere with very durable stain-preventing effect by the formulation of a surface active agent having at least one fluorine atom in a molecule and a specific organosilicon compound of the formula R.sup.1 --CO--NR.sup.2 --CH.sub.2).sub.b SiR.sup.3.sub.a O.sub.(3-a)/2, in which R.sup.1 and R.sup.2 are each a hydrogen atom or a monovalent hydrocarbon group, R.sup.3 is a hydrogen atom, or monovalent hydrocarbon group, a is 0-3 and b is a positive integer not larger than 10, in addition to the usual components of conventional room temperature curable silicone rubber compositions.Type: GrantFiled: May 30, 1985Date of Patent: September 22, 1987Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yoshio Inoue, Masatoshi Arai, Takeo Inoue
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Patent number: 4639489Abstract: Foam control compositions are prepared by reacting a mixture of components which include a polyorganosiloxane fluid bearing one or more hydroxyl and/or hydrocarbonoxy groups, a resinous siloxane or a silicone resin-producing silicon compound, a finely divided filler material and a catalyst to promote the reaction of the listed components. The compositions can optionally contain a polyorganosiloxane fluid which is substantially free of reactive groups and/or a polyorganosiloxane fluid bearing two or more hydroxyl and/or hydrocarbonoxy groups.Type: GrantFiled: May 29, 1985Date of Patent: January 27, 1987Assignee: Dow Corning Kabushiki KaishaInventors: Koichi Aizawa, Shingo Sewa, Hideki Nakahara
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Patent number: 4609486Abstract: The shelf life of an aqueous, anionic silicone emulsion, which contains an organic tin compound and which forms an elastomer upon removal of the water, is improved by the addition of an additive. The additive is selected from the group consisting of alkyl mercaptan, 8-quinolinol, thioglycolic acid, and salts of thioglycolic acid. Elastomers produced by removing the water from these emulsions, once shelf aged, have more consistent physical properties than do elastomers produced from similar emulsions not containing the additives.Type: GrantFiled: February 25, 1985Date of Patent: September 2, 1986Assignee: Dow Corning CorporationInventors: Alan L. Freiberg, Daniel Graiver, Thomas F. Lim, Antony P. Wright
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Patent number: 4602060Abstract: A two-stage system can provide a water-soluble releasing interface which permits a plurality of cycles of the mold between applications with such reaction-injection molding materials as reinforced urethane. The two-coat release system provides on the mold surface a base coat, including a polymer release agent with groups capable of bonding to the mold surface (e.g., a carboxy-terminated silicone) and a bonding or cross-linking agent (e.g., tetraisopropyltitanate), which reacts with and cross links the polymer and provides bonding with the mold surface and for soap-like materials, and a top coat, which is a water-soluble soap-like material (e.g., a water-soluble metallic salt of long-chain fatty acid). Such a system can be particularly adapted for use with urethane RIM materials.Type: GrantFiled: April 25, 1983Date of Patent: July 22, 1986Assignee: Frekote, Inc.Inventors: Sheldon L. Clark, Frank P. Pajaujis
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Patent number: 4595610Abstract: There is disclosed a room temperature curing silicone for protecting polyurethane foam. The silicone coating provides protection from ultraviolet light, water penetration, and mechanical damage. The silicone coating comprises a particular organosilicon resin, an hydroxy-ended silicone polymer, fillers, and an organotin catalyst.Type: GrantFiled: July 2, 1984Date of Patent: June 17, 1986Assignee: Dow Corning CorporationInventors: Kenneth C. Fey, Harold V. Lefler, III
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Patent number: 4588770Abstract: A silicone composition which is stable in the absence of moisture but which in the presence of water will cure at room temperature to an elastomer, comprising a polyorganosiloxane having reactive end groups, a polyester and a thickening filler.Type: GrantFiled: June 21, 1984Date of Patent: May 13, 1986Assignee: Bayer AktiengesellschaftInventors: Thomas Wurminghausen, Franz Saykowski, Hans Sattlegger
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Patent number: 4585821Abstract: A composition which is curable in the presence of moisture to an elastomer having improved adhesion to certain substrates, especially concrete. The composition comprises the product obtained by mixing together (A) a polydiorganosiloxane having terminal silanol groups, (B) an alkoxysilane R.sub.a Si(OR').sub.4-a wherein R represents a monovalent hydrocarbon or halogenated hydrocarbon group having 1-6 carbon atoms, R' is a C.sub.1 to C.sub.4 alkyl group and a is 0 or 1, (C) an organic titanium catalyst, (D) a reinforcing or semi-reinforcing filler and (E) a polydiorganosiloxane gum having a plasticity number (ASTM Test D-926) in the range from 100 to 200.The compositions are particularly suitable for use as sealants for building structures.Type: GrantFiled: May 20, 1985Date of Patent: April 29, 1986Assignees: Dow Corning Ltd., Dow Corning S.A.Inventors: Eric R. Progneaux, Brian R. Trego
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Patent number: 4578417Abstract: A moisture curable composition having an improved storage stability comprising a hydrolyzable silyl group-containing vinyl polymer and an orthoacetic acid ester as a stabilizer. The storage stability of the composition containing the hydrolyzable silyl group-containing vinyl polymer, which is curable in the presence of moisture at low temperatures, can be remarkably improved by the presence of the orthoacetic acid ester.Type: GrantFiled: October 2, 1984Date of Patent: March 25, 1986Assignee: Kanegafuchi Kagaku Kogyo Kabushiki KaishaInventors: Hisao Furukawa, Keiko Okada, Joe Kawamura, Yasushi Kato
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Patent number: 4571365Abstract: There is disclosed transparent, abrasion resistant coating compositions comprising a colloidal dispersion of a water insoluble dispersant in a water-alcohol solution of the partial condensate of silanol wherein the dispersant comprises metals, alloys, salts, oxides and hydroxides thereof.Type: GrantFiled: April 1, 1982Date of Patent: February 18, 1986Assignee: Swedlow, Inc.Inventors: Lysander T. Ashlock, Harold Mukamal, William H. White
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Patent number: 4535109Abstract: Described is a method of producing silicone aqueous emulsion compositions which cure at room temperature by the removal of water to form elastomeric coatings or films with superior surface gloss, good adhesion to substrates, and rustproofness. The method prepares an emulsion of polydiorganosiloxane having at least two hydroxyl groups per molecule, colloidal silica or alkali metal silicate, curing catalyst, emulsifier, and water, the emulsion having a pH of from 9 to 12. After a period of ripening for a period of time, so that an elastomeric material will be formed when water is removed at room temperature, an amino-functional silane or its partial hydrolyzate is added to give the emulsion its improved properties.Type: GrantFiled: September 24, 1984Date of Patent: August 13, 1985Assignee: Toray Silicone Company, Ltd.Inventors: Hidetoshi Kondo, Taro Koshii
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Patent number: 4534928Abstract: An improved molding process is provided which comprises treating a mold surface with certain curable silicone compositions to improve the release of molded articles from the mold. The silicone mold release composition is obtained by mixing predominately hydroxyl terminated polydimethylsiloxane, an alkoxysilane such as methyltrimethoxysilane, a metal alkoxide such as tetraalkyltitanate and a non-reactive, volatile solvent. The composition is stable if stored in containers that exclude moisture, but cures when exposed to moisture. Molds with surfaces coated by these compositions provide easy release of many successively molded articles such as high resiliency polyurethane foam cushions for automobiles.Type: GrantFiled: December 19, 1983Date of Patent: August 13, 1985Assignee: Dow Corning CorporationInventor: David L. Martin
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Patent number: 4529749Abstract: Microorganism-resistant, storage-stable, single-component room temperature vulcanizable organopolysiloxane compositions, especially adapted as sealants, are comprised of:(A) 100 parts of an .alpha.,.omega.-dihydroxydiorganopolysiloxane polymer;(B) 2 to 25 parts of an organosilane;(C) 5 to 200 parts of inorganic filler material;(D) 0.0003 to 15 parts of a hardening catalyst; and(E) 0.01 to 1.2% by weight, based upon the total weight of the composition, of at least one fungicidal tetraalkylthiuram disulfide.Type: GrantFiled: August 8, 1984Date of Patent: July 16, 1985Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Georges Favre, Patrice Perrin
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Patent number: 4528324Abstract: In accordance with the present invention, there is provided a one-component alkoxy-functional RTV silicone rubber composition in which all the ingredients are continuously mixed in, generally, a devolatilizing extruder. In a more preferred embodiment, the polyalkoxy diorganopolysiloxane polymer is first formed in a static mixer and then this polymer along with the other ingredients are continuously mixed in a devolatilizing extruder to continuously form a preferred alkoxy-functional one component RTV composition of the instant case.Type: GrantFiled: June 12, 1984Date of Patent: July 9, 1985Assignee: General Electric CompanyInventors: Rack H. Chung, Gary M. Lucas, August O. Liermann
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Patent number: 4525565Abstract: Provided are single component organopolysiloxane compositions which are hardenable at ambient temperatures and contain as the cross-linking agent silanes with hydrocarbonoyloxy (acyloxy) or ketoniminoxy groups. The compositions further comprise a cross-linking catalyst which is an organic derivative of titanium, e.g., a titanium ester, polytitanoxane, alkanolamine titanate, etc., or an organic derivative of zirconium, e.g., a zirconate, polyzirconate, etc. After cross-linking, the present compositions provide organopolysiloxane elastomers exhibiting good properties.The organopolysiloxane compositions are referred to as "single component" to contrast them with the two-component organopolysiloxane compositions which are not storage stable and must therefore be handled in two separate packages, which problem is overcome by the present compositions.Type: GrantFiled: July 29, 1983Date of Patent: June 25, 1985Assignee: Rhone-Poulenc Specialites ChimiquesInventors: Bernard Laisney, Michel Letoffe, Patrice Perrin, Jean Ulrich
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Patent number: 4505955Abstract: A uniform mixture consisting essentially of an aqueous silicone elastomeric emulsion and mineral particles having an average particle diameter of greater than 150 micrometers is described. The emulsion comprises an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, colloidal silica, and an alkyl tin salt. The uniform mixture can be applied to building surfaces such as structural foam insulation or wooden walls to provide a protective covering. The cured coating can provide protection from weathering, physical damage, and fire.Type: GrantFiled: July 30, 1981Date of Patent: March 19, 1985Assignee: Dow Corning CorporationInventor: Michael D. Meddaugh
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Patent number: 4504621Abstract: A silicone elastomer obtained by drying an aqueous silicone elastomeric emulsion containing an anionically stabilized hydroxyl endblocked polydiorganosiloxane, colloidal silica, alkyl tin salt, and clay exhibits weight loss and embrittlement on exposure to elevated temperature. It has been found that the rate of weight loss can be reduced by the addition of greater than 2 parts by weight of finely divided zinc oxide per 100 parts of polydiorganosiloxane by weight to the emulsion.Type: GrantFiled: December 28, 1983Date of Patent: March 12, 1985Assignee: Dow Corning CorporationInventor: Harold V. Lefler, III
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Patent number: 4500669Abstract: There is disclosed transparent, abrasion resistant coating compositions comprising a colloidal dispersion of a water insoluble dispersant in a water-alcohol solution of the partial condensate of silanol wherein the dispersant comprises metals, alloys and salts thereof.Type: GrantFiled: April 3, 1980Date of Patent: February 19, 1985Assignee: Swedlow, Inc.Inventors: L. T. Ashlock, Harold Mukamal, William H. White
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Patent number: 4499229Abstract: Stable, substantially acid-free, one-package moisture curable alkoxy terminated organopolysiloxane compositions are provided. These room temperature vulcanizable alkoxy terminated organopolysiloxane compositions use a condensation catalyst, a stabilizer, or scavenger for materials having chemically combined hydroxy radicals and diorganosulfoxide, such as dimethylsulfoxide which functions as a cure rate accelerator.Type: GrantFiled: April 1, 1983Date of Patent: February 12, 1985Assignee: General Electric CompanyInventor: Thomas P. Lockhart
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Patent number: 4489191Abstract: There is provided a one package silicone RTV composition which is convertible to a tack-free elastomer, comprising:(A) a polydiorganosiloxane base polymer,(B) an effective amount of condensation catalyst,(C) a stabilizing amount of scavenger for hydroxy functional groups wherein said scavenger contains at least one silicon-bonded hydrogen;(D) optionally, a crosslinking silane;(E) optionally, a cure accelerator; and(F) optionally, a scavenger for hydrogen gas.Type: GrantFiled: August 31, 1983Date of Patent: December 18, 1984Assignee: General Electric CompanyInventor: Rack H. Chung, deceased