Patents Assigned to Corning Limited
  • Patent number: 7754800
    Abstract: 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: Grant
    Filed: April 3, 2006
    Date of Patent: July 13, 2010
    Assignees: Dow Corning Europe SA, Dow Corning Limited, Dow Corning Corporation
    Inventors: Isabelle Maton, Guiseppina Lavinaro, Jean Willieme, Tommy Detemmerman, Robert Drake, Jary Jensen
  • Publication number: 20090239049
    Abstract: 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: Application
    Filed: May 18, 2009
    Publication date: September 24, 2009
    Applicant: DOW CORNING LIMITED
    Inventors: Patrick Barry Hook, Kenneth E. Evans, Jonathan Paul Hannington, Claire Hartmann-Thompson, Timothy Rex Bunce
  • Patent number: 7429638
    Abstract: 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: Grant
    Filed: July 18, 2002
    Date of Patent: September 30, 2008
    Assignee: Dow Corning Limited
    Inventors: Pierre Maurice Chevalier, Duan Li Ou
  • Publication number: 20080150261
    Abstract: 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: Application
    Filed: December 22, 2005
    Publication date: June 26, 2008
    Applicants: MULTIBASE SA, DOW CORNING LIMITED
    Inventors: Alexis Von Tschammer, Daniel Milesi
  • Patent number: 7323429
    Abstract: 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: Grant
    Filed: December 5, 2001
    Date of Patent: January 29, 2008
    Assignee: Dow Corning Limited
    Inventor: Hagen Demes
  • Patent number: 7208619
    Abstract: 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: Grant
    Filed: July 18, 2002
    Date of Patent: April 24, 2007
    Assignee: Dow Corning Limited
    Inventors: Timothy Rex Bunce, Avril Surgenor, Stephen Westall
  • Publication number: 20070031667
    Abstract: 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: Application
    Filed: March 26, 2004
    Publication date: February 8, 2007
    Applicant: Dow Corning Limited (GB)
    Inventors: Patrick Hook, Kenneth Evans, Jonathan Hannington, Claire Hartmann-Thompson, Timothy Bunce
  • Publication number: 20070026244
    Abstract: 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: Application
    Filed: January 30, 2004
    Publication date: February 1, 2007
    Applicant: DOW CORNING LIMITED
    Inventors: Graham Budden, Stephen James
  • Patent number: 7019098
    Abstract: 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: Grant
    Filed: May 14, 2002
    Date of Patent: March 28, 2006
    Assignee: Dow Corning Limited
    Inventor: Peter Cheshire Hupfield
  • Patent number: 6905996
    Abstract: 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: Grant
    Filed: December 5, 2001
    Date of Patent: June 14, 2005
    Assignee: Dow Corning Limited
    Inventors: Helmut Fackler, Hagen Demes
  • Patent number: 6806339
    Abstract: 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: Grant
    Filed: November 5, 2001
    Date of Patent: October 19, 2004
    Assignee: Dow Corning Limited
    Inventors: Stephen Edward Cray, John Francis
  • Patent number: 6709752
    Abstract: 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: Grant
    Filed: February 13, 2002
    Date of Patent: March 23, 2004
    Assignee: Dow Corning Limited
    Inventors: Stephen James, David Lawson, Melanie Van Der Veen
  • Patent number: 6448196
    Abstract: 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: Grant
    Filed: December 9, 1999
    Date of Patent: September 10, 2002
    Assignee: Dow Corning Limited
    Inventors: David Eglin, Jean de la Cro Habimana, Peter Hupfield, Avril Surgenor, Richard Taylor
  • Patent number: 6387451
    Abstract: 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: Grant
    Filed: July 11, 1996
    Date of Patent: May 14, 2002
    Assignee: Dow Corning Limited
    Inventors: Alan Collins, Antoon Peeters
  • Patent number: 6353075
    Abstract: 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: Grant
    Filed: December 9, 1999
    Date of Patent: March 5, 2002
    Assignee: Dow Corning Limited
    Inventors: Peter Hupfield, Avril Surgenor, Richard Taylor
  • Patent number: 6350891
    Abstract: 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: Grant
    Filed: December 9, 1999
    Date of Patent: February 26, 2002
    Assignee: Dow Corning Limited
    Inventors: David Eglin, Jean de la Cro Habimana, Sarah Louise O'Hare, Richard Taylor
  • Patent number: 6346593
    Abstract: 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: Grant
    Filed: December 9, 1999
    Date of Patent: February 12, 2002
    Assignee: Dow Corning Limited
    Inventors: Peter Hupfield, Grainne Moloney, Avril Surgenor, Richard Taylor
  • Patent number: 6284859
    Abstract: 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: Grant
    Filed: December 9, 1999
    Date of Patent: September 4, 2001
    Assignee: Dow Corning Limited
    Inventors: Peter Hupfield, Avril Surgenor, Richard Taylor
  • Patent number: 6265086
    Abstract: 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: Grant
    Filed: June 8, 1999
    Date of Patent: July 24, 2001
    Assignee: Dow Corning Limited
    Inventor: Brian Harkness
  • Patent number: 6221993
    Abstract: 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: Grant
    Filed: August 26, 1999
    Date of Patent: April 24, 2001
    Assignee: Dow Corning Limited
    Inventors: John Currie, Phillip Griffith, William Herron, Richard Taylor