Patents Represented by Attorney, Agent or Law Firm Alex Weitz
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Patent number: 6303681Abstract: A flame-retardant polyolefin-type resin composition comprising (A) 100 weight parts polyolefin-type resin, (B) 30 to 200 weight parts powder of a hydrated metal compound, and (C) 0.01 to 50 weight parts branched organopolysiloxane with average unit formula RaSiO(4−a)/2 where each R is a selected from the group consisting of monovalent organic groups selected from the group consisting of C1 to C12 alkyl and C6 to C12 aryl and hydroxyl, wherein aryl constitutes from 50 to 100 mole % of the total monovalent organic groups and the hydroxyl content in each molecule is from 1 to 10 weight %, a is a number from 0.75 to 2.5, and the organopolysiloxane contains at least one RSiO3/2 siloxane unit in each molecule, where R is as previously described. The composition is useful as a flame-retardant coating on electrical cables.Type: GrantFiled: September 15, 2000Date of Patent: October 16, 2001Assignee: Dow Corning Toray Silicone Company, Ltd.Inventors: Haruhiko Furukawa, Hidekatsu Hatanaka, Koji Shiromoto, Hiroshi Ueki, Koji Nakanishi, Yoshitsugu Morita
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Patent number: 6281286Abstract: A thermoplastic composition having a high impact strength is disclosed, said composition being prepared by (I) mixing (A) a thermoplastic selected from a polyester resin or a polyamide resin, (B) a silicone component comprising (B′) a diorganopolysiloxane gum having a plasticity of at least 30 and having an average of at least 2 alkenyl radicals in its molecule and (B″) a fumed silica filler, (C) an organohydrido silicon compound which contains an average of at least 2 silicon-bonded hydrogen groups in its molecule, and (D) a hydrosilation catalyst, components (C) and (D) being present in an amount sufficient to cure said diorganopolysiloxane; and (II) dynamically curing said diorganopolysiloxane gum.Type: GrantFiled: September 9, 1999Date of Patent: August 28, 2001Assignee: Dow Corning CorporationInventors: Igor Chorvath, Gerald Alphonse Gornowicz, David Joseph Romenesko, Jeffrey Paul Sage
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Patent number: 6268451Abstract: A method for preparing a moisture-curable, pseudo-telechelic, silyl-functional polyisobutylene terpolymer is disclosed, said method comprising reacting, in the presence of a Lewis acid and a solvent, (A) an isobutylene monomer; (B) a isopropenylphenyl comonomer having the formula (C) a vinylphenyl comonomer of the formula wherein R′ is a divalent non-aromatic hydrocarbon group having 2 to 6 carbon atoms, R″ is independently selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having 6 to 10 carbon atoms, R is a divalent non-aromatic hydrocarbon group having 2 to 6 carbon atoms, X is independently a hydrolyzable group and n is independently 1, 2 or 3, with the proviso that rAC is greater than 1 and rAB is less than 1, wherein rAB is the reactivity ratio of said isobutylene in the presence of said comonomer (B) and said solvent and rAC is the reactivity ratio of said isobutylene in the presence of said comonomer (C) and said solvent.Type: GrantFiled: October 3, 2000Date of Patent: July 31, 2001Assignees: University of Massachusetts Lowell, Dow Corning Corporation LowellInventors: Rudolf Faust, Savvas E. Hadjikyriacou, Toshio Suzuki
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Patent number: 6258878Abstract: There is disclosed a stable, one-part moisture-curable composition containing: (A) 100 parts by weight of a saturated hydrocarbon polymer having on average more than 2 hydrolyzable silyl groups in its molecule; (B) 10 to 300 parts by weight of a silicon-free conduit compound having at least one C6 to C30 hydrocarbon group in its molecule, said compound being selected from the group consisting of (i) esters, (ii) ethers, (iii) epoxy-containing compounds, (iv) anhydrides and (v) ketones; and (C) a sufficient amount of a silanol condensation catalyst to cure said composition upon exposure to moisture.Type: GrantFiled: March 29, 1999Date of Patent: July 10, 2001Assignee: Dow Corning CorporationInventors: Maneesh Bahadur, Toshio Suzuki, Simon Toth
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Patent number: 6235920Abstract: The present invention relates to a method for preparing a functional halosilanes by reacting A) a cyclic silyl ether having the formula wherein each R is independently selected from a hydrocarbyl group or a halogen-substituted hydrocarbyl group having 1 to 20 carbon atoms, each R′ is independently selected from a group consisting of hydrogen and R and b is 3, 4 or 5; and (B) a halogen-functional compound having a formula selected from wherein Q is a monovalent group having 2 to 20 carbon atoms selected from alkenyl groups, aralkenyl groups or a heterocyclic hydrocarbyl group having oxygen, nitrogen or sulfur hetero atoms in its ring, G is an m-valent organic group, m is at least 2, X is halogen, R″ is independently selected from hydrocarbyl groups or halogen-substituted hydrocarbyl groups having 1 to 20 carbon atoms, j is an integer having a value of 1 to 3 and k is an integer having a value of 1 to 3.Type: GrantFiled: July 19, 1999Date of Patent: May 22, 2001Assignee: Dow Corning CorporationInventors: Michael Kang-Jen Lee, Aroop Kumar Roy
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Patent number: 6194597Abstract: There is disclosed a method for preparing a silyl-functional living cationic polymer which can be subsequently coupled to form a moisture-curable telechelic system, said method comprising reacting, in the presence of a Lewis acid, (A) at least one cationically polymerizable monomer with (B) an initiator of the formula wherein R is selected from H or methyl group, R′ is a divalent non-aromatic hydrocarbon group having, 1 to 6 carbon atoms, R″ is selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having, 6 to 10 carbon atoms, X is halogen, Y is halogen and n is 1, 2 or 3.Type: GrantFiled: April 15, 1999Date of Patent: February 27, 2001Assignees: Dow Corning Corporation, University of MassachusettsInventors: Rudolf Faust, Savvas E. Hadjikyriacou, Aroop Kumar Roy, Toshio Suzuki
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Patent number: 6180712Abstract: There is disclosed a silicone water-based emulsion composition suitable for treating fibers to provide a non-yellowing and adherent coating thereupon, said composition comprising: (A) an organopolysiloxane having at least 2 silicon-bonded groups selected from hydroxyl or alkoxy groups in each molecule; (B) a microparticulate silica; (C) a curing catalyst; and (D) a silatrane derivative.Type: GrantFiled: August 27, 1999Date of Patent: January 30, 2001Assignee: Dow Corning Silicone Co., Ltd.Inventors: Hiroki Ishikawa, Tsutomu Naganawa, Isao Ona, Makoto Yoshitake
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Patent number: 6162892Abstract: The invention relates to a gas barrier composition as well as to composite structures having at least one surface of a molded resin coated with the composition, said composition comprising:(A) an alkoxysilyl functional polyamine compound, or a hydrolyzate thereof, said polyamine compound having three or more amine groups, at least one nitrogen atom of said amine groups being bonded to a hydrogen atom and at least one nitrogen of said amine groups being bonded to an alkoxysilyl group expressed by the formula--W--SiR.sup.2.sub.3-f (OR.sup.1).sub.fwherein R.sup.1 is an alkyl group having 1 to 6 carbon atoms, R.sup.Type: GrantFiled: September 28, 1999Date of Patent: December 19, 2000Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Hideki Kobayashi, Masayuki Hayashi
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Patent number: 6153691Abstract: There is disclosed a method for preparing a thermoplastic elastomer, said method comprising:(I) first mixing(A) a thermoplastic resin selected from polyolefins, polyamides, thermoplastic polyurethanes or styrenic block copolymers,(B) at least one silanol-terminated diorganopolysiloxane having a viscosity of at least 10 Pa-s at 25.degree. C.,(C) optionally, up to 300 parts by weight of a filler for each 100 parts by weight of said diorganopolysiloxane, said filler being selected from the group consisting of(i) a reinforcing filler for said diorganopolysiloxane and(ii) a silicone resin,(D) an organohydrido silicon compound which contains an average of at least 2 silicon-bonded hydrogen groups in its molecule and(E) a condensation catalyst, components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane; and(II) dynamically curing said diorganopolysiloxane (B).Type: GrantFiled: October 7, 1998Date of Patent: November 28, 2000Assignee: Dow Corning CorporationInventors: Gerald Alphonse Gornowicz, Hongxi Zhang
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Patent number: 6133394Abstract: A method for preparaing of an organofunctional organopentasiloxane which finds utility as a modifier for organic resins is disclosed, said method comprising:(I) reacting(A) a cyclotrisiloxane and(B) an .alpha.,.omega.-dihydrogendiorganodisiloxane in the presence of an(C) acid catalystto prepare an .alpha.,.omega.-dihydrogendiorganopentasiloxane having the formulaR.sub.2 HSiO(R.sub.2 SiO).sub.3 SiHR.sub.2wherein R independently represents a monovalent group free of aliphatic unsaturation selected from hydrocarbon or halogenated hydrocarbon groups; and(II) running an addition reaction in the presence of (D) a hydrosilylation catalyst between said .alpha.,.omega.-dihydrogendiorganopentasiloxane and (E) an organic compound containing a monovalent group selected from epoxy or phenol groups as well as an unsaturated aliphatic hydrocarbon group. In a variation of the method, the .alpha.,.omega.Type: GrantFiled: January 26, 1999Date of Patent: October 17, 2000Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Haruhiko Furukawa, Tadashi Okawa, Hiroshi Ueki, Yoshitsugu Morita
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Patent number: 6117933Abstract: A silicone rubber particulate composition useful as an additive for cosmetics, rubbers, resins and paints is disclosed, said composition comprising:(A) a silicone rubber particulate having an average particle size of 0.1 to 1,000 .mu.m;(B) a water-absorptive resin particulate having a water-free average particle size of 0.1 to 1,000 .mu.m; and(C) water,wherein said component (B) is present at a level of 0.01 to 5 weight percent measured on a water-free basis relative to component (A) and said water is present at a level of 10 to 10,000 weight parts for each 100 weight parts of component (B).Type: GrantFiled: June 22, 1999Date of Patent: September 12, 2000Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Kouichi Ozaki, Norio Matsuda, Makoto Tanoue, Toyohiko Yamadera, Mitsuo Hamada
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Patent number: 6087461Abstract: A process for making silyl endblocked organic polymers of the formula R.sup.1.sub.3 SiM is disclosed which comprises contacting under anhydrous conditions M' monomers and/or oligomers of M' with a silyl cation R.sup.1.sub.3 Si.sup.+ devoid of any siloxane bonds wherein each R.sup.1 independently denotes an optionally substituted hydrocarbon or hydrocarbonoxy group, hydrogen, a halogen or a monovalent siloxane-free silicon-containing group and M is an organic polymer made by the addition polymerisation of ethylenically unsaturated monomers M' of the formula H(R.sup.3)--C.dbd.C--(R.sup.2).sub.2 wherein each R.sup.2 independently denotes an optionally substituted hydrocarbon, hydrogen or a halogen and R.sup.3 denotes a hydrogen or methyl group. Preferably the monomer M' is an olefin.Type: GrantFiled: June 23, 1998Date of Patent: July 11, 2000Assignee: Dow Corning LimitedInventors: Jean Habimana, Claire Thompson
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Patent number: 6080489Abstract: The present invention therefore relates to a composition comprising:(A) 100 parts by weight of a thermoplastic resin (A); and(B) at least 0.5 part by weight of a siloxane blend (B) consisting essentially of 50-99% by weight of the siloxane blend of a high molecular weight siloxane having a viscosity of greater than 60 Pa.s and 1-50% by weight of the siloxane blend of a low molecular weight siloxane having a viscosity of 10 to 330 Pa.s, wherein said high molecular weight siloxane has a viscosity greater than the viscosity of said low molecular weight siloxane.These compositions exhibit surprisingly improved properties, such as having reduced coefficient of friction, consistent coefficient of friction over time, increased hydrophobicity and improved abrasion resistance.Type: GrantFiled: January 4, 1999Date of Patent: June 27, 2000Assignee: Dow Corning CorporationInventor: Veerag Yagnik Mehta
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Patent number: 6077892Abstract: The adhesion of cured polyolefin compositions to a variety of substrates is improved using as the adhesion promoter the combination of 1) an organic or organosilicon compound containing at least one epoxy group and 2) at least one compound containing a) at least one silanol or carbinol group or a hydrolyzable silanol group precursor, and b) at least one group that reacts during curing of the polyolefin.Type: GrantFiled: September 4, 1998Date of Patent: June 20, 2000Assignee: Dow Corning CorporationInventors: Qian Jane Feng, Kenneth Michael Lee, Michael Andrew Lutz, Michael James Owen, Susan Victoria Perz, Toshio Suzuki
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Patent number: 6072013Abstract: There is disclosed a silicone-grafted vinyl polymer and a method for the preparation thereof, said polymer having grafted silicone side chains of the formula: ##STR1## as well as grafted silicone side chains of the formula: ##STR2## wherein R independently represents a monovalent hydrocarbon group which is free of aliphatic unsaturation, R.sup.1 is a divalent group selected from hydrocarbon groups or alkyleneoxyalkylene groups, a is 0 or 1 and n is an integer having a value of at least 1.Type: GrantFiled: November 24, 1998Date of Patent: June 6, 2000Assignee: Dow Corning Toray Silicone Co., Ltd.Inventors: Ryuko Manzouji, Tadashi Okawa, Ryuzo Mikami
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Patent number: 6060559Abstract: The presence in curable polyolefin compositions of a moisture curable organosilicon compound containing at least one alkenyloxy group bonded to the silicon atoms improves the adhesion to a variety of substrates that is developed during the curing reaction of polyolefin compositions cured by a hydrosilation reaction. The organosilicon compound is preferably a reaction product of ingredients comprising 1) a silane or bis-silylalkane containing at least three silicon-bonded moisture-reactive groups per molecule and 2) an organic compound containing at least one carbinol group and at least one ethylenically unsaturated group.Type: GrantFiled: September 4, 1998Date of Patent: May 9, 2000Assignee: Dow Corning CorporationInventors: Qian Jane Feng, Robert Edward Kalinowski, Kenneth Michael Lee, Michael Andrew Lutz, Michael James Owen, Susan Victoria Perz, Toshio Suzuki
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Patent number: 6051657Abstract: There is disclosed a method for preparing a silyl-functional living cationic polymer which can be subsequently coupled to form a moisture-curable telechelic system, said method comprising reacting, in the presence of a Lewis acid,(A) at least one cationically polymerizable monomer with(B) an initiator of the formula ##STR1## wherein R is selected from alkyl groups having 1 to 10 carbon atoms or aryl groups having 6 to 10 carbon atoms, R' is a divalent aliphatic hydrocarbon group having at least 3 carbon atoms, X is halogen, Y is selected from the group consisting of halogen, alkoxy. acyloxy and hydroxyl groups and a is 1, 2 or 3.Type: GrantFiled: December 3, 1998Date of Patent: April 18, 2000Assignees: Dow Corning Asia, Ltd., University of Massachusetts LowellInventors: Rudolf Faust, Savvas E. Hadjikyriacou, Toshio Suzuki
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Patent number: 6046281Abstract: A method for coupling a living cationic polymer is disclosed, said method comprising reacting the living cationic polymer with an organic compound having at least 2 furan rings in its molecule, said reaction taking place in the presence of a Lewis acid. Preferably, the living cationic polymer is first prepared by polymerizing at least one monomer selected from isobutylene, isoprene or a styrenic monomer using a specific initiator, this reaction also being carried out in the presence of a Lewis acid.Type: GrantFiled: November 6, 1997Date of Patent: April 4, 2000Assignees: University of Massachusetts Lowell, Dow Corning CorporationInventors: Rudolf Faust, Savvas E. Hadjikyriacou, Toshio Suzuki
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Patent number: 6034179Abstract: The present invention provides adhesion promoters for curable polyolefin compositions wherein said adhesion promoters are selected from a specified group of hydrocarbyloxy-substituted organosilicon compounds and condensation products of these compounds. At least one hydrocarbyloxy group on each silicon atom of the adhesion promoter is derived from a polyhydric alcohol containing at least two hydroxyl groups per molecule and substantially no ethylenic unsaturation.Type: GrantFiled: August 28, 1998Date of Patent: March 7, 2000Assignee: Dow Corning CorporationsInventors: Qian Jane Feng, Kenneth Michael Lee, Michael Andrew Lutz, Michael James Owen, Susan Victoria Perz, Toshio Suzuki
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Patent number: 6022623Abstract: In order to effectively stop noises in the interior of a vehicle occurring to relative movements between individual components or a component and associated support part, it is proposed to coat them with a lacquer at the contact points.Type: GrantFiled: August 13, 1997Date of Patent: February 8, 2000Assignees: Dow Coring GmbH, Bayerishe Motoren Werke AktiengesellschaftInventors: Vittorio Clerici, Martin Muller, Klaus Steinberg, Harald Markolwitz, Anton Weber, Franz Hammer, Josef Huber-Hesselberger, Johann Weindl, Franz Wimmer, Gerhard Prechtl