Patents Assigned to Dow Corning S.A.
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Patent number: 5807009Abstract: A mechanical coupling comprises an input member, an output member a chamber associated therewith, within the chamber a charge of cured silicone composition in crumb form and a spring biased piston for compressing the charge to an extent sufficient to permit the compressed silicone to convey rotational motion from the input member to the output member.Type: GrantFiled: December 12, 1994Date of Patent: September 15, 1998Assignee: Dow Corning S. A.Inventors: Robert John Michael, Rene Louis Mathieu Andre Paquet
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Patent number: 5767053Abstract: A method of making a particulate foam control agent comprising 0.001 to 30 parts of silicone antifoam, 45 to 99 parts of a zeolite and 0 to 30 parts of a binder, preferably of a polycarboxylate-type, able to release at least some antifoam from the zeolite in the first 10 minutes of a washing cycle comprises depositing from 0.1 to 500% of the silicone antifoam of an organic surfactant onto the zeolite not later than depositing the silicone antifoam, at least 1 part of surfactant being used per 100 parts of the foam control agent. Also covered are detergent compositions and some foam control agents.Type: GrantFiled: December 20, 1995Date of Patent: June 16, 1998Assignee: Dow Corning S. A.Inventors: Pierre Andre Georges Gustave Germain, Bernhard Ernst Gold, Jan Sybren Hoogland, Bertrand Louis Julien Lenoble, Mark Prince
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Patent number: 5767760Abstract: Prior to winding wire in a coil around a foil, the foil is coated on a least one surface side with a tacky silicone composition. A composition on the foil exerts a retaining force on the wires discouraging said wires from sliding away from an original or intended position.Type: GrantFiled: December 19, 1996Date of Patent: June 16, 1998Assignee: Dow Corning S. A.Inventors: Jean-Paul Mollie, Michael Ortner
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Patent number: 5741439Abstract: An emulsion composition is described which comprises (a) an alkenylated silicone resin, (b) an alkenyl polydiorganosiloxane, (c) a silicone resin bearing SiH groups and (d) water. The emulsion composition may be combined with a precious metal catalyst to provide an emulsion release coating composition. The emulsion release coating composition may be applied to a substrate, for example paper, and cured thereon to provide an adhesive coating. Separation of a laminate formed from a substrate coated with said emulsion release coating composition and a adhesive coated article requires a relatively high delamination force.Type: GrantFiled: November 22, 1996Date of Patent: April 21, 1998Assignee: Dow Corning S. A.Inventors: Stephen Armstrong, Andre Detrembleur
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Patent number: 5733996Abstract: The specification describes and claims a composition curable in presence of atmospheric moisture to an elastomeric body, comprising (A) the product formed by mixing a polymeric material having at least two groups bonded to silicon which are hydroxyl or hydrolysable (eg alkoxy) groups and an alkoxysilane curative and (B) a compound according to the general formula M?OR!.sub.x ?OR'!.sub.y where M represents a metal having a valency of 4 selected from Group IVB of the Periodic Table and is preferably titanium, x has a value from 0 to 1, y has a value from 3 to 4 and (x+y)=4, R' represents a monovalent tertiary aliphatic hydrocarbon group and R represents a monovalent linear aliphatic hydrocarbon group having 1 to 6 carbon atoms which is different from R'. Preferred compounds (B) are those in which R' represents C(R.sup.2 R.sup.3 R.sup.4) in which each of R.sup.2, R.sup.3 and R.sup.Type: GrantFiled: June 4, 1996Date of Patent: March 31, 1998Assignee: Dow Corning S.A.Inventors: Francois De Buyl, Patrick Leempoel
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Patent number: 5693256Abstract: A foam control agent comprising 100 parts by weight of a water-insoluble organic liquid, from 0.1 to 20 parts by weight of a first hydrophobic filler with a size of no more than 20 .mu.m, preferably silica, and from 0.1 to 20 parts by weight of a second hydrophobic filler having a size of at least 30 .mu.m, preferably an organopolysiloxane resin, said fillers being insoluble in the organic liquid. The foam control agent is particularly useful as an antifoam in detergent compositions, paper pulp manufacture, textile dyeing or cutting oils.Type: GrantFiled: June 1, 1995Date of Patent: December 2, 1997Assignee: Dow Corning S.A.Inventors: George Christopher Sawicki, Frank Andre Daniel Renauld, Jacqueline L'Hostis
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Patent number: 5668101Abstract: A method of providing a foam control agent with 1 to 30 parts of a silicone antifoam and 70 to 99 parts of a zeolite carrier, with the ability to release some of the antifoam within 10 minutes of being dispersed in an aqueous surfactant solution, by depositing 5 to 70% of the antifoam of an organopolysiloxane polyoxyalkylene copolymer, onto the zeolite carrier not later than depositing the silicone antifoam. Also claimed is the use of the copolymer to achieve that end and compositions where the antifoam is branched or high viscosity. Also claimed is encapsulated agents.Type: GrantFiled: July 18, 1994Date of Patent: September 16, 1997Assignee: Dow Corning S. A.Inventors: Leonidas Kolaitis, Bertrand Louis Julien Lenoble
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Patent number: 5659001Abstract: A moisture curable composition is claimed comprising (a) a condensation product of a polyacid chloride with an alkylene or oxyalkylene polymer having substituent groups condensible therewith with an organosilicon compound having at least one silicon-bonded group --R(NHR.sup.1).sub.m NH.sub.2 e.g. a material of the general formula ##STR1## wherein each R may be the same or different and represent a linking group, each R' represents a group --R(NHR.sup.1).sub.m NH.sub.2, a hydrolysable group R", a group R'" or a group R'Si(OSiR.sup.1.sub.2).sub.s --O-- where R'" is a hydrocarbon group, m is from 0 to 10 and s is from 0 to 1500 and (b) a curative. Preferred materials are amino silanes in which R" is an oximo, alkoxy, alkenyloxy or alkoxyalkoxy group, --R(NHR.sup.1).sub.m NH.sub.2 is aminopropyl and m is 0. The aminosilane is preferably .gamma.-aminopropyltrimethoxysilane or .gamma.-aminopropyltriethoxysilane and the organic polymer is a polyoxyalkylene glycol.Type: GrantFiled: November 30, 1995Date of Patent: August 19, 1997Assignee: Dow Corning S. A.Inventors: Jean de la Croi Habimana, Patrick Leempoel
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Patent number: 5627252Abstract: Polymers are prepared by reaction between a polymer prepared by reaction between (A) an OH terminated reaction product of a polyacid chloride and an organic polymer having substituent groups condensable therewith and (B) a silane or siloxane having a group capable of reaction with substituent groups of the reaction product (A). Reaction product (A) is preferably derived from a polyoxyalkylene glycol and a diacid chloride. Silane or siloxane (B) is preferably an epoxy silane and preferably has at least one silicon- bonded hydrolysable group. Preferred polymers are employed in moisture curable composition, e.g. as sealants.Type: GrantFiled: November 30, 1995Date of Patent: May 6, 1997Assignee: Dow Corning S. A.Inventor: Jean De La Croi Habimana
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Patent number: 5589449Abstract: A particulate foam control agent comprises 1 to 30 parts silicone antifoam, 70 to 99 parts zeolite carrier, 1 to 60% of the antifoam of an organopolysiloxane polyoxyalkylene copolymer, deposited onto the zeolite carrier not later than the antifoam and 1 to 40 parts by weight of a polycarboxylate-type binder or encapsulant. This combination give good release in early stages, storage stability and powder characteristics.Type: GrantFiled: July 22, 1994Date of Patent: December 31, 1996Assignee: Dow Corning S.A.Inventors: Leonidas Kolaitis, Bertrand L. J. Lenoble, Mark A. Prince
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Patent number: 5532606Abstract: A method and apparatus for determining surface characteristics of a layer (e.g. anodised aluminum) by measuring electrical impedance thereof and solving specified equations.Type: GrantFiled: October 17, 1994Date of Patent: July 2, 1996Assignee: Dow Corning S. A.Inventor: Pierre Descamps
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Patent number: 5492992Abstract: A process for making liquid polymers by condensing monomers and/or oligomers, mixing them with a catalyst where required, and dispersing the mixture via an atomizing device to form small droplets suspended in a reaction chamber. The reagents are caused to polymerize in the dispersed state. The process is preferably carried out in a spray dryer using an atomizing device and is particularly useful for polymerizing organosilicon compounds by condensation.Type: GrantFiled: December 5, 1994Date of Patent: February 20, 1996Assignee: Dow Corning S.A.Inventor: Jean M. Gilson
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Patent number: 5486306Abstract: A foam control agent which is free from hydrocarbon oils and comprises (A) an organopolysiloxane with 0 to 60% of units (i) ##EQU1## wherein R denotes a C.sub.8 hydrocarbon group and a is 0-3, and 40 to 100% of units (ii) ##EQU2## wherein R" is --Z.sub.z --R' with R' being an C.sub.9-35 alkyl, Z is a linking group and z is 0 or 1, b 0, 1 or 2, c 1 or 2 and b+c 1, 2 or 3, provided more than 70% by weight of the carbon content of (A) is due to R", (B) a finely divided hydrophobic particulate material and (C) optionally a MQ organosilicon resin. The agents give improved performance and stability e.g. in detergent powders.Type: GrantFiled: June 25, 1993Date of Patent: January 23, 1996Assignee: Dow Corning, S.A.Inventors: Jacqueline L'Hostis, Franck A. D. Renauld, George C. Sawicki
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Patent number: 5456888Abstract: A continuous static polymerization reactor for the production of liquid polymers comprises an elongated hollow reaction chamber (30) which has a porous wall (31) and a jacket means (40) spaced around the reaction chamber (30), which is provided with means (44) for introducing a fluid through the porous wall (31). The reactor is particularly useful for a process for making liquid polymers by condensing monomers and/or oligomers. It comprising the use of a pressurized gas to cause the reaction mixture to reach a foam consistency. This is beneficial in the condensation polymerization. Feeding a fluid through the porous wall into the reaction chamber avoids build up of the polymer on the wall.Type: GrantFiled: November 16, 1993Date of Patent: October 10, 1995Assignee: Dow Corning S.A.Inventors: Jean-Marc Gilson, Denis Sbardella
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Patent number: 5449560Abstract: A liquid curable composition prepared from a polydiorganosiloxane having ethylenically unsaturation, a polyhydrogenorganosiloxane, a catalyst for the addition of silicon-bonded hydrogen to ethylenically unsaturation, a particulate filler wherein the composition cured to an elastomeric state has a loss modulus, E", of at least 100 MPa at -120.degree. C., a loss tangent of at least 0.15 at -120.degree. C., and a tear strength of less than 10 kN/m at 23.degree. C., makes an interlayer for a laminate of glass or other brittle which fails safely when receiving a breaking impact.Type: GrantFiled: December 23, 1993Date of Patent: September 12, 1995Assignee: Dow Corning S.A.Inventors: Nicole Antheunis, Andreas T. F. Wolf
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Patent number: 5447745Abstract: The specification describes and claims a method of bonding a sealant to an anodised aluminium surface the method comprising the steps of (1) measuring the electrical impedance of anodised aluminium substrates, (2) selecting at least one substrate having an electrical phase shift of from 0.4 to 0.5, (3) cleaning the anodised surface of the substrate, (4) applying to the anodised surface a curable silicone sealant composition and (5) bringing about curing of the sealant composition to form a bond between the anodised surface and the sealant.Type: GrantFiled: October 17, 1994Date of Patent: September 5, 1995Assignee: Dow Corning S.A.Inventor: Pierre Descamps
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Patent number: 5429771Abstract: A suds-controlling composition of improved stability in aqueous surfactants, such as detergents, is disclosed comprising a silicon antifoam consisting essentially of a liquid branched polyorganosiloxane and a finely divided filler having a hydrophobic surface; a polyorganosiloxane polyoxyalkylene copolymer; and a cyclic organopolysiloxane. The silicone antifoam and polyorganosiloxane polyoxyalkylene copolymer are combined in a ratio of 1/3 to 3/1.Type: GrantFiled: February 7, 1994Date of Patent: July 4, 1995Assignee: Dow Corning S. A.Inventors: Robert H. M. Fleuren, Jacqueline L'Hostis, Elizabeth F. Mallen, Franck A. D. Renauld
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Patent number: 5425947Abstract: The specification describes and claims a moisture curable composition comprising hydroxypolysiloxane, silane curing agent, finely divided filler (preferably calcium carbonate), catalyst, and as rheological additive, a polymer having on its polymer chain at least one carboxylic acid anhydride group. Preferred rheological additives are polybutadiene polymers treated with e.g. maleic acid anhydride. These products have improved rheology for sealant use.Type: GrantFiled: November 19, 1992Date of Patent: June 20, 1995Assignee: Dow Corning S.A.Inventors: Jean-Paul Hautekeer, Patrick Leempoel
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Patent number: 5389404Abstract: Progress for preparing a catalyst for hydrosilylation reactions which comprises reacting (A) a rhodium complex Rh(R.sub.2 S).sub.3 X.sub.3, in which R represents alkyl and other specified hydrocarbon groups and X represents Cl or Br with (B) an organohydrogen polysiloxane in the presence of (C) an organosiloxane having silicon-bonded vinyl or allyl groups. The ratio of silicon-bonded hydrogen atoms provided by (B) to each Rh atom provided by (B) is in the range from 0.5:1 to 6.0:1.The invention also includes the use of the catalyst for reacting .tbd.SiH with .tbd.Si Alkenyl especially in compositions for the treatment of substrates such as paper and plastics.Type: GrantFiled: August 19, 1993Date of Patent: February 14, 1995Assignee: Dow Corning S.A.Inventor: Stephen Armstrong
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Patent number: 5387364Abstract: Foam in an environment with free surface turbulence is controlled with a foam control agent which comprises (A) 5 to 90 parts by weight of an organopolysiloxane having at least 40% siloxane units with a substituent --Z.sub.z --R' wherein R' is a C.sub.9-35 alkyl group, Z is a linking group with silicon and z is 0 or 1, provided more than 70% by weight of its carbon content is due to the groups --Z.sub.z --R', (B) 0.1 to 30 parts by weight of a finely divided hydrophobic particulate material, (C) 5 to 95 parts by weight of a hydrocarbon oil and (D) 0 to 20 parts by weight of an organosilicon MQ resin.Type: GrantFiled: June 25, 1993Date of Patent: February 7, 1995Assignee: Dow Corning S.A.Inventors: Beatrice Nedelec, Franck A. D. Renauld, George C. Sawicki