Patents Assigned to Corning Limited
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Patent number: 7754800Abstract: A moisture curable composition capable of cure to an elastomeric body comprising (a) a diluted polymer comprising (i) a silicon containing polymer of the formula X-A-X1 where X and X1 are independently selected from silyl groups which contain one or more condensable substituents per group and A is a polymeric chain having a number average molecular weight (Mn) of at least 132 000; and a degree of polymerisation of at least 1800. (ii) an organic extender and/or plasticiser which diluted polymer is obtained by polymerisation in the presence of the said organic extender and/or plasticiser (b) a suitable cross-linking agent which comprises at least two groups which are reactable with the condensable groups in the diluted polymer, (c) a suitable condensation catalyst and optionally (e) one or more fillers.Type: GrantFiled: April 3, 2006Date of Patent: July 13, 2010Assignees: Dow Corning Europe SA, Dow Corning Limited, Dow Corning CorporationInventors: Isabelle Maton, Guiseppina Lavinaro, Jean Willieme, Tommy Detemmerman, Robert Drake, Jary Jensen
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Publication number: 20090239049Abstract: The invention provides composite components, structures and method for producing composite components. A composite component has a negative effect Poisson's ratio and comprises a first component and a second component. The first component and the second component extend longitudinally relative to an axis, the first component being provided around the second component through one or more turns which are spaced longitudinally relative to the axis. A variation in the tensile load on the first component causes the radial position of the second component relative to the axis to vary.Type: ApplicationFiled: May 18, 2009Publication date: September 24, 2009Applicant: DOW CORNING LIMITEDInventors: Patrick Barry Hook, Kenneth E. Evans, Jonathan Paul Hannington, Claire Hartmann-Thompson, Timothy Rex Bunce
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Patent number: 7429638Abstract: A polysiloxane having a refractive index of about 1.56 measured at light wavelength 633 nm, characterized in that the polysiloxane includes siloxane T units of the formula where A represents an alkylene group having 1 to 4 carbon atoms: n=0 or 1; m is at least 1; and Ar is an aryl group substituted by at least one iodine, bromine or chlorine atom, or is a polynuclear aromatic group. The invention includes chlorosilanes having the formula (Ar) m-(A)nSiCl3, useful in forming high refractive index polysiloxanes.Type: GrantFiled: July 18, 2002Date of Patent: September 30, 2008Assignee: Dow Corning LimitedInventors: Pierre Maurice Chevalier, Duan Li Ou
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Publication number: 20080150261Abstract: The invention concerns a partly cross-linked thermoplastic elastomer polyolefin composition intended to be converted by any plastics processing technique, but by injection in particular, into a moulded part, such as, for example, a cover for housing a vehicle's safety airbag, comprising an olefin polymer of polypropylene type, at least one copolymer of ethylene-?-olefin type, at least one cross-linking agent and a free radicals formation agent characterised in that a) the olefin polymer of polypropylene type is chosen from the group of polypropylene/ethylene or polypropylene/?-olefin copolymers and selected from those having an impact resistance of at least 40 kJ/m2 when measured using the notched Izod impact resistance test at 23° C. in accordance with ISO standard 180. b) at least one copolymer of the ethylene-?-olefin type is selected from the group formed by those having a density at least equal to 0.870 g/cm3 in accordance with ISO standard 1183.Type: ApplicationFiled: December 22, 2005Publication date: June 26, 2008Applicants: MULTIBASE SA, DOW CORNING LIMITEDInventors: Alexis Von Tschammer, Daniel Milesi
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Patent number: 7323429Abstract: A method for pacifying the spent bed material resulting from the synthesis of organohalosilanes and halosilanes by mixing clay with spent bed material. Clay compositions containing at least 10 weight % of clay and spent bed material, as well as ceramic compositions containing spent bed material, are also provided.Type: GrantFiled: December 5, 2001Date of Patent: January 29, 2008Assignee: Dow Corning LimitedInventor: Hagen Demes
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Patent number: 7208619Abstract: A silane or siloxane containing at least one organic group is prepared by a hydrosilylation reaction between a silane or siloxane (A) containing at least one Si—H group and an allyl compound (B) in the presence of a noble metal catalyst. The silane or siloxane (A) and the allyl compound (B) are fed continuously through a reaction zone which is maintained at a temperature in the range 115–200° C. and which is provided with heat exchanger means to dissipate the heat from the exothermic hydrosilylation reaction. The residence time of (A) and (B) in the reaction zone is less than 20 minutes.Type: GrantFiled: July 18, 2002Date of Patent: April 24, 2007Assignee: Dow Corning LimitedInventors: Timothy Rex Bunce, Avril Surgenor, Stephen Westall
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Publication number: 20070031667Abstract: The invention provides composite components, structures and method for producing composite components A composite component has a negative effective Poisson's ratio and comprises a first component and a second component. The first component and the second component extend longitudinally relative to an axis, the first component being provided around the second component through one or more turns which are spaced longitudinally relative to the axis. A variation in the tensile load on the first component causes the radial position of the second component relative to the axis to vary.Type: ApplicationFiled: March 26, 2004Publication date: February 8, 2007Applicant: Dow Corning Limited (GB)Inventors: Patrick Hook, Kenneth Evans, Jonathan Hannington, Claire Hartmann-Thompson, Timothy Bunce
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Publication number: 20070026244Abstract: An organopolysiloxane composition for coating textile fabrics which is curable to an elastomer comprises at least one organopolysiloxane having silicon-bonded aliphatically unsaturaded hydrocarbon groups, an organosilicon crosslinker having at least 3 silicon-bonded hydrogen atoms, a precious metal catalyst and 15 to 30 parts by weight of a filler per 100 parts of the weight of the total composition. The filler has a Moh hardness no greater than 4.5 and a mean particle size no greater than 3.0 ?m.Type: ApplicationFiled: January 30, 2004Publication date: February 1, 2007Applicant: DOW CORNING LIMITEDInventors: Graham Budden, Stephen James
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Patent number: 7019098Abstract: A crosslinked polysiloxane comprises polysiloxane chains substituted by an ester-containing organic moiety joined by crosslinks derived from the reaction of an alpha, omega-diunsaturated hydrocarbon or fluorohydrocarbon with Si—H groups on the polysiloxane chains. The ester-containing organic moiety has the formula -A-COOR where A is an alkylene linkage having 1–18 carbon atoms which is optionally fluoro-substituted and R is an alkyl or fluoroalkyl group. The crosslinked polysiloxane can form an elastomeric gel in a liquid organic or silicone material, which is useful in preparing cosmetics.Type: GrantFiled: May 14, 2002Date of Patent: March 28, 2006Assignee: Dow Corning LimitedInventor: Peter Cheshire Hupfield
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Patent number: 6905996Abstract: This invention provides methods for making ceramic articles with improved density, compression strength and efflorescence properties, in which a pre-ceramic article containing direct process residue gel is heated at an elevated temperature.Type: GrantFiled: December 5, 2001Date of Patent: June 14, 2005Assignee: Dow Corning LimitedInventors: Helmut Fackler, Hagen Demes
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Patent number: 6806339Abstract: A branched siloxane contains at least three aliphatically unsaturated hydrocarbon groups, is terminated by units of the formula RaRb2SiO1/2 and otherwise consists of: i) one or more units of the formula(SiO4/2); and ii) from 15 to 995 units of the formula Rb2SiO2/2 which units (i) and (ii) may be inter-linked in any appropriate combination. The invention includes a method of making the branched siloxane and release coating and release modifier compositions containing the branched siloxane.Type: GrantFiled: November 5, 2001Date of Patent: October 19, 2004Assignee: Dow Corning LimitedInventors: Stephen Edward Cray, John Francis
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Patent number: 6709752Abstract: An elastomer-forming coating composition for textile fabrics comprises a first, second and third organopolysiloxane having aliphatically unsaturated substituents, an organosilicon crosslinker having at least 3 silicon-bonded hydrogen atoms, a catalyst and a reinforcing filler. First and second organopolysiloxanes have only terminal aliphatically unsaturated substituents, first having a viscosity at 25° C. of from 50 to 650 mm2/s, second a viscosity at 25° C. of at least 10,000 mm2/s and third organopolysiloxane has aliphatically unsaturated substituents at terminal siloxane units and on siloxane units in the siloxane polymer chain. Coated textile fabrics and a process for making them is also claimed. Coated fabrics are especially useful in applications where they form a barrier between areas of differing pressures, e.g. airbags. Resulting coatings combine very good tear strength and elongation at break values.Type: GrantFiled: February 13, 2002Date of Patent: March 23, 2004Assignee: Dow Corning LimitedInventors: Stephen James, David Lawson, Melanie Van Der Veen
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Patent number: 6448196Abstract: Siloxanes are polymerized by equilibration, condensation and/or ring-opening polymerization using a phosphazene base catalyst. A linear phosphazene base catalyst of the general formula wherein R denotes a C1-10 hydrocarbon or wherein two R groups on one N atom form with the N atom a heterocyclic group, X denotes an anion and n is from 1 to 10 is prepared by reacting a linear phosphonitrile halide compound with a secondary amine or a salt of a secondary amine or a metal amide thereof to form an aminated phosphazene material, followed by an ion exchange reaction replacing the anion with a nucleophile.Type: GrantFiled: December 9, 1999Date of Patent: September 10, 2002Assignee: Dow Corning LimitedInventors: David Eglin, Jean de la Cro Habimana, Peter Hupfield, Avril Surgenor, Richard Taylor
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Patent number: 6387451Abstract: A curable coating composition which exhibits improved cure and adhesion to various substrates comprises a composition curable by a hydrosilylation reaction and includes a silicone resin, a hydrosilylation reaction inhibitor and an adhesion promoting additive which comprises an organosilicon compound having epoxy and alkoxy functionalities, an alkenylsilanol, an organotitanium compound and a metal chelate compound.Type: GrantFiled: July 11, 1996Date of Patent: May 14, 2002Assignee: Dow Corning LimitedInventors: Alan Collins, Antoon Peeters
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Patent number: 6353075Abstract: A polymerization process comprising mixing a siloxane having silicon-bonded groups R′ and a cyclic or linear siloxane having no silicon-bonded groups R′ with a phosphazene base catalyst in the presence of water and allowing the siloxane having silicon-bonded groups R′ to condense and the cyclic or linear siloxane having no silicon-bonded R′ groups to polymerize by equilibration.Type: GrantFiled: December 9, 1999Date of Patent: March 5, 2002Assignee: Dow Corning LimitedInventors: Peter Hupfield, Avril Surgenor, Richard Taylor
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Patent number: 6350891Abstract: Phosphonitrile halides are prepared employing the use of disilazanes. The resultant products may be further reacted with cyclosiloxanes to form siloxane containing phosphonitrile halides.Type: GrantFiled: December 9, 1999Date of Patent: February 26, 2002Assignee: Dow Corning LimitedInventors: David Eglin, Jean de la Cro Habimana, Sarah Louise O'Hare, Richard Taylor
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Patent number: 6346593Abstract: A polymerization process comprising mixing siloxane polymers with organosilicon compounds having at least one silicon-bonded group RN, which is a substituent comprising at least one amine group, and with a phosphazene base catalyst and allowing the siloxanes and organosilicon compounds to polymerize to form amino-functional polyorganosiloxane polymers is claimed.Type: GrantFiled: December 9, 1999Date of Patent: February 12, 2002Assignee: Dow Corning LimitedInventors: Peter Hupfield, Grainne Moloney, Avril Surgenor, Richard Taylor
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Patent number: 6284859Abstract: A polymerization process comprising mixing siloxanes having silicon-bonded groups R′ with ionic phosphazene base catalysts and allowing condensation via reaction of Si—R′ groups with the formation of a Si—O—Si linkage, R′ denoting a hydroxyl group or a hydrocarbonoxy group having up to 8 carbon atoms is claimed. The catalysts may be of the general formulae: {((R12N)3P═N—)x(R12N)3−xP—N(H)R2}+{A−} or {((R12N)3P═N—)y(R12N)4−yP}+{A}− in which R1 is hydrogen or an optionally substituted hydrocarbon group or in which two R1 groups bonded to the same N atom may be linked to complete a heterocyclic ring, R2 is hydrogen or an optionally substituted hydrocarbon group, x is 1, 2 or 3, y is 1, 2, 3 or 4 and A is an anion.Type: GrantFiled: December 9, 1999Date of Patent: September 4, 2001Assignee: Dow Corning LimitedInventors: Peter Hupfield, Avril Surgenor, Richard Taylor
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Patent number: 6265086Abstract: A method for selective electroless metal deposition on a substrate. The method comprises applying a patterned coating comprising a silyl hydride functional resin onto a substrate. An electroless plating solution comprising a metal ion is then applied onto the silyl hydride functional resin coating to deposit a patterned metal film on the substrate. The process of the invention is especially useful in the electronics industry.Type: GrantFiled: June 8, 1999Date of Patent: July 24, 2001Assignee: Dow Corning LimitedInventor: Brian Harkness
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Patent number: 6221993Abstract: A continuous process for producing a silicone polymer comprises the sequential steps of (i) polymerisation of a linear silanol group containing siloxane by condensation polymerisation, or of a cyclosiloxane by ring opening polymerisation, or of a mixture of said linear and cyclosiloxanes with a phosphazene base in the presence of water and the presence or absence of a filler in an extruder, (ii) neutralising the reaction mixture in an extruder, and (iii) stripping the neutralised reaction mixture to remove volatile materials. Preferably, step (iii) is performed in an extruder, more preferably steps (i), (ii) and (iii) are all performed in the same extruder.Type: GrantFiled: August 26, 1999Date of Patent: April 24, 2001Assignee: Dow Corning LimitedInventors: John Currie, Phillip Griffith, William Herron, Richard Taylor