Material Is A Metal-containing Material Patents (Class 528/14)
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Patent number: 5877232Abstract: The invention relates to a self-curing, photochemically or thermally curable resinous dental composition based on polymerisable polysiloxanes, to a process for its preparation and to its use for the preparation of pasty, self-curing, photochemically or thermally curable dental materials. Said composition is obtainable by hydrolytic condensation of one or more hydrolytically condensable silicon compounds, 1 to 100 mol %, based on monomeric compounds, of silanes of the general formula: Y.sub.n- SiX.sub.m R.sub.4-(n+m) and/or {X.sub.n R.sub.k Si?R.sup.2 (A).sub.l !.sub.4-(n+k) }.sub.x B being selected. The radicals A, X, Y, R.sup.2, R' and R are identical or different and have the following meaning: A=O, S, PR', POR', NHC(O)O or NHC(O)ONR', B=a straight-chain or branched organic radical which is derived from a compound B' having at least one (for l=1 and A=NHC(O)O or NHC(O)NR') or at least two C.dbd.C double bonds and 5 to 50 carbon atoms, R=alkyl, alkenyl, aryl, alkylaryl or arylalkyl, R'=H, alkyl or aryl, R.Type: GrantFiled: September 13, 1996Date of Patent: March 2, 1999Assignee: The Procter & Gamble CompanyInventors: Werner Storch, Herbert Wolter
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Patent number: 5861468Abstract: A curable polysiloxane of formulaA.sub.a B.sub.b (R.sub.3 SiO.sub.0.5).sub.c (R.sub.2 SiO).sub.d (RSiO.sub.1.5).sub.e (SiO.sub.2).sub.fwhere A and B are silacyclobutane, disilacyclobutane or benzosilacyclobutene functional groups. A composition of matter comprising this polysiloxane and a copper, silver or gold containing catalyst. A method of curing this polysiloxane.Type: GrantFiled: December 1, 1995Date of Patent: January 19, 1999Assignee: Dow Corning Asia, Ltd.Inventors: Brian Robert Harkness, Mamoru Tachikawa, Kasumi Takeuchi
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Patent number: 5861467Abstract: The present invention relates to radiation curable silicone vinyl ethers and methods for preparing silicone vinyl ethers. More particularly, the present invention relates compositions containing vinyl ether functional silicones and to the preparation and use of silicone vinyl ethers which are curable by addition of photocleavable acids and exposure to ultraviolet or electron beam radiation.Type: GrantFiled: May 18, 1993Date of Patent: January 19, 1999Assignee: Dow Corning CorporationInventors: Valerie Joy Bujanowski, Shedric Oneal Glover, Susan Victoria Perz, Maris Jazeps Ziemelis, Gary Rex Homan, Michael Ward Skinner
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Patent number: 5858599Abstract: An anti-offsetting oil including an organopolysiloxane having the formula (1) below and containing low molecular weight organopolysiloxanes having a molecular weight of 3,000 or less in a content of 50 ppm or less. ##STR1## wherein R.sub.f 's represent a perfluoroalkyl which may contain at least one ether linkage; R's represent a monovalent hydrocarbon group; Y's represent a divalent organic group having 2 to 5 carbon atoms; a represents an integer of 1 or more and b represents an integer of 0 or more, provided that a and b satisfy 3a+3b+2=15 to 4,000; and c and d are an integer of 0 to 3. This fluid has a good wettability to silicone rubber or fluorine forming the surfaces of fixing rolls of electrophotographic copying machines, and hence can effectively prevent offset. Since it contains no low-molecular weight organopolysiloxanes, the electric-contact failure may hardly occur.Type: GrantFiled: November 6, 1997Date of Patent: January 12, 1999Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Hiromasa Yamaguchi, Hirofumi Kishita
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Patent number: 5852137Abstract: In one aspect, this invention is a polyurethane sealant composition comprising (1) a urethane prepolymer having an isocyanate functionality of at least about 2.0 and a weight average molecular weight of at least about 2,000; and (2) a catalytic amount of (a) a substantially active hydrogen free glycol acid salt of a tertiary amine and an organo metallic compound, (b) a mixture of a substantially active hydrogen free glycol acid salt of a tertiary amine and an organo metallic compound and a second organometallic compound, or (c) a mixture of an organometallic compound with dimorpholinodialkyl ether or an dialkylmorpholinodialkyl ether.Type: GrantFiled: January 29, 1997Date of Patent: December 22, 1998Assignee: Essex Specialty ProductsInventors: Harry W. Hsieh, Syed Z. Mahdi
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Patent number: 5852153Abstract: A novel cyclotrisiloxane having the following general formula (1) and a novel copolymer synthesized using the cyclotrisiloxane are provided. The copolymer is excellent in low-temperature characteristics, heat resistance, temperature-viscosity characteristics, and compatibility with various fluids and is particularly useful as a starting material for use in cosmetics and greases. ##STR1## wherein R.sup.2 is a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, a halogenated alkyl group, an alkenyl group, an acryloyloxypropyl group or a methacryloyloxypropyl group, and R.sup.3 is a methyl group or a phenyl group.Type: GrantFiled: September 4, 1997Date of Patent: December 22, 1998Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Michihiro Sugo, Hisashi Aoki
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Patent number: 5852129Abstract: A method for producing a hydroxyl-terminated (meth) acrylic polymer which comprises converting a halogen atom in a terminal structure of the general formula (1)--CH.sub.2 --C(R.sup.1)(CO.sub.2 R.sup.2)(X) (1)wherein R.sup.1 is hydrogen or methyl, R.sup.2 is alkyl containing 1 to 20 carbon atoms, aryl containing 6 to 20 carbon atoms or aralkyl containing 7 to 20 carbon atoms, and X is chlorine, bromine or iodine, of a (meth)acrylic polymer obtained by polymerizing a (meth)acrylic monomer using an organic halide or a halogenated sulfonyl compound as an initiator and, as a catalyst, a metal complex with a central metal selected from the elements belonging to the groups 8, 9, 10 and 11 in the periodic table, into a hydroxyl-containing substituent.The present invention can provide, in an easy and simple manner, a (meth)acrylic polymer which is hydroxyl-terminated at both ends in a high proportion and which has been difficult to produce in the prior art. It can give a cured product with good curing characteristics.Type: GrantFiled: November 28, 1997Date of Patent: December 22, 1998Assignee: Kaneka CorporationInventors: Masato Kusakabe, Kenichi Kitano, Yoshiki Nakagawa
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Patent number: 5808126Abstract: A method for preparing an .alpha.,.omega.-silyl terminated branched polyalkenylenes and polyolefins is provided. The method involves:(I) reacting a mixture comprising(A) at least one branched acyclic diene, and(B) at least one alkenylsilane in the presence of an acid free metathesis catalyst system to produce an .alpha.,.omega.-silyl terminated branched polyalkenylene; or(I) reacting a mixture of(A) at least one cycloolefin, and(B) at least one alkenylsilane in the presence of an acid free metathesis catalyst system to produce an .alpha.,.omega.-silyl terminated branched polyalkenylene. The .alpha.,.omega.-silyl terminated branched polyalkenylene produced by these methods may be hydrogenated to produce an .alpha.,.omega.-silyl terminated branched polyolefin.Type: GrantFiled: September 3, 1997Date of Patent: September 15, 1998Assignees: Dow Corning Corporation, The University of FloridaInventors: Krystyna Regina Brzezinska, Gary Thomas Burns, Russell Keith King, Kenneth Boone Wagener
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Patent number: 5798428Abstract: There is disclosed a method of making polysilanes by polymerization of a silane in the presence of a catalyst comprising a phosphine-stabilized polyhydride of an early transition metal of Groups 4 to 7 of the Periodic Table and the resultant polysilanes which have a molecular weight higher than 1,000 and a polydispersity below about 2.Type: GrantFiled: September 20, 1996Date of Patent: August 25, 1998Assignee: Osaka Gas Co., Ltd.Inventors: Stuart T. Schwab, Partha P. Paul, Ryoichi Nishida
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Patent number: 5789515Abstract: A colorant composition has the structure ABXYZ, whereA is an organic chromophore;B is an electrophilic reactive group covalently bonded to A directly or through a linking group;X is a nucleophilic linking group covalently bonding B and YY is a poly(oxyalkylene)-polysiloxane copolymer; andZ is a terminal group for Y.The colorant composition can be prepared from a reactive dye AB which is reacted with XYZ, a poly(oxyalkylene)-polysiloxane copolymer.Type: GrantFiled: March 13, 1997Date of Patent: August 4, 1998Assignee: Milliken Research CorporationInventor: John D. Bruhnke
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Patent number: 5789517Abstract: A continuous production method of polyorganosiloxane particles by press-introducing an organoalkoxysilane into an aqueous phase such as water through a porous membrane to form a monodisperse O/W type emulsion and adding a catalyst to the emulsion to condensation polymerize the organoalkoxysilane. Non-porous polyorganosiloxane particles having a uniform particle size can be stably and continuously produced with a high efficiency.Type: GrantFiled: September 26, 1996Date of Patent: August 4, 1998Assignee: Toshiba Silicone Co., Ltd.Inventors: Tetsunori Ochiai, Makoto Nishida, Mitsunori Iwasaki
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Patent number: 5777059Abstract: The present invention relates to a silicone composition prepared by reacting a mixture of (i) a polyisobutylene compound, (ii) a polyorganosiloxane, (iii) a silicon compound, and (iv) a catalytic amount of a catalyst. The compositions of this invention are resistant to phase separation and are useful as foam control compositions in foam producing systems.Type: GrantFiled: April 19, 1996Date of Patent: July 7, 1998Assignee: Dow Corning CorporationInventors: Teresa Lynn Datz-Siegel, Kenneth Christopher Fey
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Patent number: 5777051Abstract: Silacyclobutene monomers, and polymers based on silacyclobutene building blocks, exhibit photoluminescence in the blue region of the visible spectrum when excited by ultraviolet light.Type: GrantFiled: June 16, 1997Date of Patent: July 7, 1998Assignee: Dow Corning CorporationInventors: Norbert Auner, Udo C. Pernisz
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Patent number: 5770269Abstract: An article includes a substrate having a thermal control coating formed of 1 part by weight of a silicone polymeric matrix having from about 3 to about 4 parts by weight aluminum-doped zinc oxide pigment particles distributed therein. The article may be either relatively thick or flexibly thin, and the coating may be greater than 0.0015 inches thick so as to have a low solar absorptance. The coating has an absorptance of about 0.2-0.3 and an emittance of about 0.9, and is sufficiently electrically conductive to dissipate electrostatic charges.Type: GrantFiled: September 20, 1996Date of Patent: June 23, 1998Assignee: Hughes Aircraft CompanyInventors: Lynn E. Long, Joan L. Lum
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Patent number: 5747623Abstract: A method for forming dense ceramics, particularly a ceramic coating by a low temperature treatment is provided. The method for forming ceramics according to the invention is characterized in that a polysilazane having a number-average molecular weight of 100 to 50,000 or a modified polysilazane thereof is subjected to a heat treatment, then exposed to an atmosphere containing water vapor or immersed in distilled water containing a catalyst, or both, or is brought into contact with Pd.sup.2+ ions and water, the polysilazane having a skeleton comprising the unit represented by the following general formula (I): ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3 each independently represents a hydrogen atom, an alkyl group, an alkenyl group, a cycloalkyl group, an aryl group, a group other than the above and having a carbon atom directly attached to the silicon atom, an alkylsilyl group, an alkylamino group and an alkoxy group; with the proviso that at least one of R.sub.1, R.sup.2 and R.sup.3 is a hydrogen atom.Type: GrantFiled: October 13, 1995Date of Patent: May 5, 1998Assignee: Tonen CorporationInventors: Hideki Matsuo, Masahiro Kokubo, Takashi Ohbayashi, Yuji Tashiro, Tadashi Suzuki, Masami Kizaki, Haruo Hashimoto, Yasuo Shimizu, Takaaki Sakurai, Hiroyuki Aoki
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Patent number: 5739246Abstract: Polysiloxanes having pendant and/or telechelic carbonyl functionality, i.e., aldehyde functionality .tbd.Si--R--CH.dbd.O or ketone functionality .tbd.Si--R--CR.dbd.O, are manufactured in high yield by ozonolysis of polydiorganosiloxanes containing alkenyl groups, followed by treatment with a reducing agent such as zinc and acetic acid. The process is relatively fast and economical using readily available starting materials such as hexenyl-functional polymers. In particular, aldehyde functionality on the polymer can be used as a polymeric crosslinking agent.Type: GrantFiled: March 6, 1997Date of Patent: April 14, 1998Assignee: Dow Corning CorporationInventors: Daniel Graiver, Aaron Quoc Khieu, Binh Thanh Nguyen
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Patent number: 5726256Abstract: The instant invention pertains to a method of producing silicone pressure sensitive adhesives wherein the method comprises (I) combining together (A) a benzene soluble, hydroxyl containing organopolysiloxane 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 radical selected from the group consisting of hydrocarbon and halogenated hydrocarbon radicals having from 1 to 10 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 and there being 1.0 to 4 wt %, based on FTIR, hydroxyl functionality and (B) a hydroxyl containing polydiorganosiloxane having a viscosity of .gtoreq.100 mPa's and (C) a catalyst selected from the group consisting of a weak organic acid or metal salt thereof; and thereafter (II) heating the mixture of (A), (B) and (C) for a time sufficient to produce the silicone pressure sensitive adhesive.Type: GrantFiled: October 22, 1996Date of Patent: March 10, 1998Assignee: Dow Corning CorporationInventors: Edward Joseph Benson, Joseph Thomas Braun, Joseph Norbert Clark, Peter Lamont
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Patent number: 5710300Abstract: A method for stabilizing a mixture comprising a polydiorganosiloxane and an alkali metal. The method comprises contacting a polydiorganosiloxane and an alkali metal with a siloxy phosphonate described by formula ##STR1## where each R.sup.1, R.sup.2, and R.sup.3 is an independently selected hydrocarbon comprising one to about 12 carbon atoms, n=0 or 1, and x, y, and z are integers, where x=1 to 1000, y=0 to 1000, and z=0 to 1000.Type: GrantFiled: April 11, 1997Date of Patent: January 20, 1998Assignee: Dow Corning CorporationInventors: Daniel Graiver, Arnold Wade Lomas
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Patent number: 5708069Abstract: The present invention is hydrophobic silica gels and a method for their preparation under neutral conditions. The method comprises two steps, where in the first step the pH of a silica hydrosol is adjusted with a base to within a range of about pH 3 to pH 7 to facilitate formation of a silica hydrogel. In the second step the silica hydrogel is contacted with an organosilicon compound in the presence of a catalytic amount of a strong acid to effect hydrophobing of the silica hydrogel. In a preferred method, in a third step the hydrophobic silica gel is contacted with a sufficient quantity of a water-immiscible organic solvent to convert the hydrophobic silica hydrogel into a hydrophobic silica organogel.Type: GrantFiled: February 24, 1997Date of Patent: January 13, 1998Assignee: Dow Corning CorporationInventors: Gary Thomas Burns, Qin Deng, James Richard Hahn, Clifford Carlton Reese
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Patent number: 5705590Abstract: A water soluble water absorption preventing agent mainly comprising an organic silicon compound and/or its partial hydrolytic condensate, represented by the following general formula: ##STR1## wherein R.sup.1 denotes an alkyl group with 1-20 carbon atoms and with a linear chain or branched chain for which a halogen can substitute for part or all of the hydrogen atoms, R.sup.2 denotes a hydrogen atom or an alkyl group with 1-10 carbon atoms and with a linear chain or branched chain, R.sup.3 denotes a hydrogen atom or an alkyl group with 1-8 carbon atoms and with a linear chain or branched chain, m denotes an integer 1-2 and n denotes an integer 1-3 where m+n=3 or 4, p denotes an integer 1-50, and q denotes an integer 0-25.Type: GrantFiled: March 26, 1996Date of Patent: January 6, 1998Assignee: Shin-Etsu Chem. Co., Ltd.Inventors: Tomohisa Suzuki, Kenichi Isobe, Mitsuo Asai, Shoji Ichinohe, Akira Yamamoto
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Patent number: 5700400Abstract: A method for producing a semiconducting material by subjecting a hydrosilane monomer to dehydrogenative condensation followed by thermal decomposition is disclosed. The hydrosilane monomer may be a hydromonosilane, a hydrodisilane or a hydrotrisilane. The dehydrogenative condensation is conducted in the presence of a catalyst that contains at least one metal or metal compound of Groups 3B, 4B and 8 of the Periodic Table. The catalyst may be used in conjunction with a silane compound or a metal hydride. The semiconducting material that is formed may have a silicon content of 70 atomic % or more.Type: GrantFiled: August 14, 1995Date of Patent: December 23, 1997Assignee: Nippon Oil Co., Ltd.Inventors: Keizo Ikai, Masaki Minami, Mitsuo Matsuno
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Patent number: 5698654Abstract: A sequential catalysis of the ring opening polymerization of cyclic organosiloxanes using a base catalyst that can be neutralized by a subsequent redistribution and condensation catalyst such as a Lewis acid catalyst, preferably a phosphonitrilic compound, permits the rapid synthesis of functionalized and poly-functionalized silicone copolymers such as alkenyl hydride copolymers, a new composition of matter.Type: GrantFiled: July 30, 1996Date of Patent: December 16, 1997Assignee: General Electric CompanyInventors: Susan A. Nye, Donna A. Riccio, Brenda S. Wutzer
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Patent number: 5698655Abstract: The present invention relates to a method of preparing an aerosol suppressant composition and to use of the composition to reduce or suppress silicone mist in high speed coating processes and significantly increase the adhesion of the coating to the substrate. More particularly, the present invention relates to a method of preparing an aerosol suppressant composition by reacting an organosilicon compound, an oxyalkylene containing compound, and a catalyst. The composition, when added to curable silicone coatings, reduces the amount of silicone mist in high speed coating processes.Type: GrantFiled: October 25, 1996Date of Patent: December 16, 1997Assignee: Dow Corning CorporationInventors: Kyuha Chung, Gary Rex Homan, Raymond Lee Tabler
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Patent number: 5693735Abstract: A novel cyclotrisiloxane having the following general formula (1) and a novel copolymer synthesized using the cyclotrisiloxane are provided. The copolymer is excellent in low-temperature characteristics, heat resistance, temperature-viscosity characteristics, and compatibility with various fluids and is particularly useful as a starting material for use in cosmetics and greases. ##STR1## wherein R.sup.2 is a hydrogen atom, an alkyl group, an aryl group, an aralkyl group, a halogenated alkyl group, an alkenyl group, an acryloyloxypropyl group or a methacryloyloxypropyl group, and R.sup.3 is a methyl group or a phenyl group.Type: GrantFiled: July 11, 1996Date of Patent: December 2, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Michihiro Sugo, Hisashi Aoki
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Patent number: 5688889Abstract: Process for conditioning textile materials in order to enable them to have, especially, a pleasant handle and a very low or even non-existent yellowing, characterized in that the textile materials are brought into contact with a composition comprising a polyorgano-siloxane having, per mole, at least one unit of general formula: ##EQU1## in which: R can represent a C.sub.1 -C.sub.4 alkyl radical;X can represent a hydrolysable radical;Z represents a residue containing (a) sterically hindered piperidyl group(s) of formulae: ##STR1## in which R.sup.1 is a divalent hydrocarbon radical, R'.sup.1 is a trivalent hydrocarbon radical, U and U' represent --O--, --NH-- or --N(alkyl)-, R.sup.2 can represent a C.sub.1 -C.sub.3 alkyl radical and R.sup.3 is H or R.sup.2,a and b are chosen from 0, 1 and 2,the sum a+b being not greater than 2.Type: GrantFiled: May 6, 1996Date of Patent: November 18, 1997Assignee: Rhone-Poulenc ChimieInventors: Edith Canivenc, Jose-Luis Roca-Ortega, Andrew Van Der Spuy
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Patent number: 5674941Abstract: A coating composition having excellent antifogging property, good abrasion resistance, improved adhesion to the substrate and good water resistance, which comprises an epoxy functional organosilane or the hydrolysate or condensate thereof; an amino functional organosilane or the hydrolysate or condensate thereof; a hydrophilic (meth)acrylate monomer, or a copolymer of two components selected from the hydrophilic (meth)acrylate monomer, another hydrophilic monomer and an organosilane and/or a terpolymer of the three components; a curing catalyst; and, optionally, a multi-functional (meth)acrylate monomer having at least two (meth)acryl groups and a radical polymerization initiator.Type: GrantFiled: April 15, 1994Date of Patent: October 7, 1997Assignee: Lucky LimitedInventors: Yong-Il Cho, Sung-Hoon Jang, Jung-Ok Park
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Patent number: 5674963Abstract: In the reaction of a polysiloxane with an alkoxysilane to produce polysiloxanes with special terminal groups, the improvement which comprises effecting the reaction in the presence of fluoride ions as activator.Type: GrantFiled: August 23, 1996Date of Patent: October 7, 1997Assignee: Bayer AktiengesellschaftInventor: Robert Friebe
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Patent number: 5672671Abstract: A process is disclosed for producing a diorganopolysiloxane by polymerizing a cyclic siloxane expressed by the following general formula (2) ##STR1## wherein R.sup.3 represents methyl group, ethyl group, or phenyl group, and p is an integer of 3 or 4,by an anion living polymerization using a lithium trialkylsilonolate or an alkyl lithium as a polymerization initiator and then terminating the anion living polymerization with an acid or a chlorosilane derivative, the improvement comprising treating a diorganopolysiloxane which is modified with a silanol at both its terminals and included in the cyclic siloxane as impurities, with an acetylating agent.Type: GrantFiled: June 21, 1996Date of Patent: September 30, 1997Assignee: Chisso CorporationInventors: Takaharu Nakano, Katsuyoshi Tsuchiya, Shunji Yoshimatsu, Takeru Fuchigami
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Patent number: 5670597Abstract: A process for the preparation of organopolysiloxanes which contain at least one unit of the formula(R.sup.1 O).sub.3-m R.sub.m SiO.sub.1/2 (I)in whichR is identical or different and is a hydrogen atom or monovalent, optionally substituted hydrocarbon radical,R.sup.1 is identical or different and is a monovalent, optionally substituted hydrocarbon radical having 1 to 8 carbon atoms andm is 0, 1 or 2,which comprises, in a 1st step, reacting organosilicon compounds (1) which contain at least one Si-bonded hydroxyl group with at least one silane (2) of the formula(R.sup.1 O).sub.4-m SiR.sub.m (II)and/or partial hydrolysates thereof, in which R, R.sup.1 and m have the above mentioned meaning, in the presence of a fluoride salt (3), and, optionally, in a 2nd step, when the reaction has ended, adding component (4) which can bond fluoride ions.Type: GrantFiled: January 31, 1995Date of Patent: September 23, 1997Assignee: Wacker-Chemie GmbHInventors: Michael Stepp, Stefan Oberneder
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Patent number: 5670596Abstract: A batch or continuous process for the production of low molecular weight hydrogen siloxanes catalyzed by soluble phosphonitrilic halides or solid acid catalysts such as acid washed clays, zeolites and ion exchange resins.Type: GrantFiled: March 27, 1996Date of Patent: September 23, 1997Assignee: General Electric CompanyInventors: John S. Razzano, Patricia P. Anderson, Robert J. Perry
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Patent number: 5663269Abstract: The present invention relates to a process for preparing an alkoxy silyl-terminated material, which has at least two alkoxy groups on both terminal ends, said process comprising reacting in the presence of a catalytically effective amount of an organo-lithium reagent an alkoxysilyl-terminated first reactant with a second reactant having both ends of its chain terminating in a silanol. The alkoxy silyl-terminated material may have a variety of polymer backbone types such as silicone, polyurethane, polyamide and the like. These materials are intended to cure by either moisture or photo cure or by dual moisture and photo cure mechanisms. The alkoxy silyl-terminated material is preferably an organopoly-siloxane having at least two alkoxy groups at both terminal ends.Type: GrantFiled: June 7, 1995Date of Patent: September 2, 1997Assignee: Loctite CorporationInventors: Hsien-Kun Chu, Robert P. Cross, Patrick J. Courtney, David I. Crossan
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Patent number: 5659056Abstract: The present invention relates to a method of reducing hydrolysis and coupling of substituents of siloxane end capped polymers containing hydrolyzable substituents during contact with water. The Mooney viscosity of siloxane terminated polymers is stabilized during such contact by treating the polymer with a stabilizing amount of stabilizing agent selected from the group consisting of: an acid, an acyl halide, methane sulfonic acid, toluene sulfonic acid, sulfuryl chloride, thionylchloride, phosgene, carbon dioxide, sulfur dioxide, sulfur trioxide, SOCl.sub.2 and SO.sub.2 Cl.sub.2, prior to contacting the siloxane terminated polymer with water.Type: GrantFiled: April 10, 1996Date of Patent: August 19, 1997Assignee: Bridgestone CorporationInventors: William L. Hergenrother, David M. Roggeman, Daniel F. Graves, Mark L. Stayer, Jr.
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Patent number: 5656710Abstract: An impregnation sealant composition comprises a low viscosity vulcanizable silicone. The silicone is selected from the group consisting of (i) a heat curable silicone composition formed as the reaction product in the presence of a platinum catalyst of a first silicon containing material containing at least two SiH functionalities and having a molecular weight less than 2000 with a second silicon containing material containing at least two ethylenically unsaturated functionalities and having a molecular weight less than 2000, said silicone composition having a ratio of SiH to Si-ethylenically unsaturated functionalities of from about 0.8 to about 1.2; and (ii) a room temperature vulcanizing silicone composition formed as the reaction product of a silicone fluid containing at least two SiOH functionalities and having a molecular weight less than 2000 with a silane cross-linker of formula (I):R.sub.n Si(X).sub.Type: GrantFiled: June 7, 1995Date of Patent: August 12, 1997Assignee: Loctite CorporationInventors: Frederick F. Newberth, III, Hsien-Kun Chu, Robert P. Cross, Peter A. Salamon
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Patent number: 5650474Abstract: A process for preparing an organic functional group-containing organopolysiloxane of the following average compositional formula (1)YmR.sup.1 nSi(OR.sup.2)pO.sub.(4-m-n-p)/2 (1)wherein Y represents an organic group having a functional group, R.sup.1 represents at least one monovalent substituted or unsubstituted hydrocarbon group, R.sup.2 represents a hydrogen atom, an alkenyl group and/or an alkenyl group, 0<m.ltoreq.1, 0.ltoreq.n<2, and 0.ltoreq.p.ltoreq.2 provided that 0<m+n+p.ltoreq.3. The organopolysiloxane is obtained by subjecting an organic functional group-containing alkoxysilane, with or without a functional group-free alkoxysilane, siloxane and/or silicone obtained from the group-free alkoxysiloxane and/or siloxane, to hydrolysis and polycondensation in the presence of a substantially neutral fluorine-containing compound. The functional group includes an epoxy group, a (meth)acryloxy group, a mercapto group and the like.Type: GrantFiled: February 16, 1996Date of Patent: July 22, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Masaaki Yamaya, Kazuyuki Matsumura, Yuji Yoshikawa
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Patent number: 5637668Abstract: A process for manufacturing high molecular weight polysiloxane copolymers by interfacial polymerization. The polysiloxanes may contain phenylmethyl siloxane blocks and dimethyl siloxane blocks, alternately polymerized together to form an (A.sub.m B.sub.n).sub.x type copolymer. The interfacial polymerization process is fast, proceeds smoothly at room temperature, and is not reversible, i.e., no cyclic siloxane species are generated. The polysiloxanes can be formed as thermoplastic elastomers suitable for use as sealants, fillers, and films.Type: GrantFiled: April 1, 1996Date of Patent: June 10, 1997Assignees: Dow Corning Corporation, University of South AustraliaInventors: Daniel Graiver, Arnold W. Lomas, Jani G. Matisons, Arthur Provatas
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Patent number: 5635579Abstract: Methyl- and phenyl-containing fluorosilicone terpolymeric fluids over the range of 30 cps to 200,000 cps are effective as additives for various uses. Over the range of 16,000 to 200,000 cps, the fluids are effective as additives in promoting a finger transferable self-bleed of lubricant in fluorosilicone-containing heat-curable rubber compositions, even after a post-bake of the composition. Over the viscosity range of 30 cps to 1000 cps, the fluids are useful in personal care and cosmetic products as water and oil repellency additives. Methods of ring opening polymerization are used to produce the terpolymeric fluids from cyclic reactants.Type: GrantFiled: November 21, 1995Date of Patent: June 3, 1997Assignee: General Electric CompanyInventors: Edwin R. Evans, Gregory H. Slocum
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Patent number: 5633312Abstract: Disclosed is a process for preparing a polyorganosilane which comprises subjecting a disilane compound having at least two substituted or unsubstituted hydrocarbyloxy groups in one molecule to disproportionation reaction in the presence of a catalyst comprising a reaction product of an organic alkali metal compound represented by the formula (I):RM (I)wherein R represents a substituted or unsubstituted monovalent hydrocarbon group; and M represents an alkali metal,represented by the formula (III):MR.sup.3.sub.p M (III)wherein R.sup.3 represents a saturated or unsaturated chain or cyclic divalent hydrocarbon group or a divalent heterocyclic group, two or more R.sup.3 s may be the same or different and an ether oxygen atom may exist between two or more R.sup.3 s; p represents an integer of 1 or more; and M represents an alkali metal atom,and at least one of a disilane compound and a silane compound both of which have a substituted or unsubstituted hydrocarbyloxy group(s).Type: GrantFiled: April 1, 1996Date of Patent: May 27, 1997Assignee: Toshiba Silicone Co., Ltd.Inventors: Keiji Kabeta, Sigeru Wakamatsu, Takafumi Imai
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Patent number: 5633311Abstract: There is provided a method of producing organopolysiloxanes by using organoalkoxysilanes and/or organoalkoxysiloxanes as starting materials and subjecting them to a hydrolytic condensation reaction, wherein at least 50% by weight of said starting materials is constituted of organoalkoxysilanes and/or organoalkoxysiloxanes represented by an average compositional formula (A):R.sup.1 .sub.a SiX .sub.b Y .sub.c O .sub.(4-a-b-c)/2 (A)wherein R.sup.1 groups are the same or different and each of them represents an unsubstituted or substituted alkyl, alkenyl or aryl group, X represents an alkoxy group containing 1 to 10 carbon atoms, Y represents an alkoxy group containing 2 to 10 carbon atoms which is different from the alkoxy group represented by X and has a hydrolysis rate lower than that of X, a is a real number from 0 to 2, b and c are each a real number from 0.1 to 3, provided that a+b+c.ltoreq.4.Type: GrantFiled: July 6, 1995Date of Patent: May 27, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Kenji Yamamoto, Kouichi Tanaka, Yuji Yoshikawa, Masaaki Yamaya
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Patent number: 5629401Abstract: An interfacial polymerization process wherein organosilicon reactants are dissolved in mutually immiscible, nonaqueous solvents, and a condensation product is formed at the interface. This technique has many of the advantages of analogous organic interfacial polymerization, and may be used, for example, to prepare crosslinked films, fibers, particles, or encapsulants. Structures which cannot be prepared by other routes can be made. In particular, a well-defined alternating dimethyl/diphenyl siloxane block copolymer can be prepared by condensing a dihalo organosilicon compound such as diphenyldichlorosilane (C.sub.6 H.sub.5).sub.2 SiCl.sub.2 in diphenyl ether with a dimethyl silanolate in cyclohexane. The advantages are ability to control polymer structure, and there is no rearrangement during polymerization.Type: GrantFiled: April 1, 1996Date of Patent: May 13, 1997Assignee: Dow Corning CorporationInventors: Daniel Graiver, Arnold W. Lomas
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Patent number: 5626968Abstract: A novel photoinitiator which includes an organometallic complex salt grafted onto a polyorganosiloxane skeleton is provided.Type: GrantFiled: January 30, 1995Date of Patent: May 6, 1997Assignee: Rhone-Poulenc ChimieInventor: Christian Priou
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Patent number: 5624680Abstract: A hydrosilyl-terminated polyoxyethylene compound of the general formula (I), a quaternary-salt-terminated polyoxyethylene/polyorganosiloxane block copolymer of the general formula (II) derived from the above compound, and a percutaneous drug absorption promoter comprising the above copolymer (II). The copolymer is usable as a percutaneous absorption promoter having a good drug absorption promoting effect and being effective for various drugs.Type: GrantFiled: January 23, 1996Date of Patent: April 29, 1997Assignee: Sagami Chemical Research CenterInventors: Yu Nagase, Takao Aoyagi, Tomoko Akimoto
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Patent number: 5625023Abstract: The present invention relates to a method of preparing an aerosol suppressant composition and to use of the composition to reduce or suppress silicone mist in high speed coating processes and significantly increase the adhesion of the coating to the substrate. More particularly, the present invention relates to a method of preparing an aerosol suppressant composition by reacting an organosilicon compound, an oxyalkylene containing compound, and a catalyst. The composition, when added to curable silicone coatings, reduces the amount of silicone mist in high speed coating processes.Type: GrantFiled: December 9, 1994Date of Patent: April 29, 1997Assignee: Dow Corning CorporationInventors: Kyuha Chung, Gary R. Homan, Raymond L. Tabler
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Patent number: 5618860Abstract: A sprayable, trowelable epoxy polysiloxane based coating and flooring composition exhibiting excellent weatherability in sunlight and superior chemical, corrosion and impact resistance after curing is made up of: (a) a resin component which includes a non-aromatic epoxy resin having at least two 1,2-epoxy groups per molecule; a polysiloxane and an organooxysilane; (b) an difunctional aminosilane hardener component; (c) an organotin catalyst; and (d) an aggregate or pigment component. Organic solvents and flow modifying agents may be added to facilitate spray application. The resin component, hardener component, aggregate component and desired catalysts are combined in the presence of a sufficient amount of water to promote the hydrolysis of polysiloxane and/or organooxysilane and the polycondensation of the silanols produced by such hydrolysis. The aminosilane and epoxide resin react to form a cured linear epoxy polymer.Type: GrantFiled: November 18, 1994Date of Patent: April 8, 1997Assignee: Ameron International CorporationInventors: Norman R. Mowrer, Raymond E. Foscante, J. Luis Rojas
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Patent number: 5618903Abstract: This invention relates to anionically polymerized block copolymers comprised of at least one block polyethylene and at least one block of a polymerized cyclic siloxane monomer, e.g., polydimethylsiloxane. Block copolymers with multiple "arms" may be formed by coupling these living diblocks with polyfunctional coupling agents. One copolymer for use in wax release coatings has an overall weight average molecular weight of 1500 to 100,000, a polyethylene block weight average molecular weight of less than 4100, and a polyethylene content of less than 55 percent by weight. Another copolymer for use in extruded release coating films prepared by blending the copolymer with a film grade polymer has an overall molecular weight of less than 20,000 and a polyethylene block molecular weight of less than 3700.Type: GrantFiled: April 17, 1996Date of Patent: April 8, 1997Assignee: Shell Oil CompanyInventors: Ronald J. Hoxmeier, Donn A. DuBois, Jeffrey G. Southwick
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Patent number: 5616674Abstract: Polycarbonate-polysiloxane block copolymers are prepared by interfacial polymerization technique in the presence or a phase transfer catalyst.Type: GrantFiled: September 20, 1995Date of Patent: April 1, 1997Assignee: General Electric CompanyInventors: Rodney L. Michel, Paul D. Sybert, Gary C. Davis, William J. Swatos
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Patent number: 5616673Abstract: Use of a certain class of acid washed clays enables a fixed bed process for the production of very low viscosity low silanol content silicone fluids to be produced in a fixed bed single reactor process.Type: GrantFiled: December 13, 1995Date of Patent: April 1, 1997Assignee: General Electric CompanyInventors: Patricia P. Anderson, Dennis P. Thompson
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Patent number: 5614603Abstract: The introduction of a highly spin-coatable silicone resin that does not produce large amounts of volatiles during its cure, and that is a precursor to highly heat-resistant, optically transparent cured products that exhibit an excellent hardness. The silicone resin comprises a silicone polymer of the general formula:(Ph.sub.2 SiO).sub.a (HSiO.sub.3/2).sub.b (R.sup.1 SiO.sub.3/2).sub.cin which R.sup.1 is hydrogen or C.sub.1 to C.sub.8 hydrocarbon group, possibly containing a heteroatom, Ph is a phenyl group and 6.ltoreq.a+b+c.ltoreq.1,000, 0.6>a/(a+b+c).gtoreq.0.4, and 1.0.gtoreq.b/(b+c).gtoreq.0.2.Type: GrantFiled: January 31, 1996Date of Patent: March 25, 1997Assignee: Dow Corning Asia, Ltd.Inventors: Brian R. Harkness, Mamoru Tachikawa, Kasumi Takeuchi
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Patent number: 5612409Abstract: Aqueous solutions or dispersions of organooligosiloxanes or organopolysiloxanes that include one or more nitrogen-containing side chains and in which a radical containing a polyoxyalkylene unit is bonded to the second Si atom of the chain are suitable for treating fiber materials. A pleasantly soft handle is hereby imparted to the fiber materials, in particular textiles. The novel siloxanes can be obtained by reacting dialkoxysilanes containing substituents having amino groups with cyclic trisiloxanes or tetrasiloxanes, followed by reaction with silanes that contain substituents having polyoxyalkylene units.Type: GrantFiled: July 18, 1995Date of Patent: March 18, 1997Assignee: Ciba-Geigy CorporationInventors: Harald Chrobaczek, Ingo Gorlitz, Michael Messner
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Patent number: 5609958Abstract: This invention offers the coating agents in order to manufacture electrophotography carrier particles with a superior endurance. Coating agents for the electrophotography carriers which are characterized by having the organopolysiloxane expressed by the general formula below:R.sub.a.sup.1 Si(OR.sup.2).sub.b (OR.sup.3).sub.c (OR.sup.4).sub.d O.sub.(4-a-b-c-d)/2wherein R.sup.1 is an organic group with 1 to 12 carbon atoms; R.sup.2 is --C.sub.m H.sub.2m+1 as herein m.gtoreq.3; R.sup.3 is --C.sub.n H.sub.2n+1 as herein n is either 1 or 2; R.sup.4 is in each case a hydrogen atom or group expressed by formulae (1) and (2) below; and subscripts a, b, c, and d are numbers which satisfy the following conditions of 0.5<a<2, 0<b.ltoreq.3, 0<c.ltoreq.3, 0<d.ltoreq.0.5 and 0.5<a+b+c+d.ltoreq.4. ##STR1## R.sup.5 in the above formulae (1) and (2) is an organic group with 1 to 6 carbon atoms and x in the formula (1) satisfies 1.ltoreq.x.ltoreq.2.Type: GrantFiled: December 15, 1995Date of Patent: March 11, 1997Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yuji Yoshikawa, Kouichi Tanaka, Kenji Yamamoto, Masaaki Yamaya
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Patent number: 5607729Abstract: A gel-free silica acrylate curable coating composition made from one or more of soluble salts, soaps, amines, nonionic and anion surfactants, acids or mixtures thereof, and a method for producing these compositions.Type: GrantFiled: February 26, 1996Date of Patent: March 4, 1997Assignee: General Electric CompanyInventor: George F. Medford