Patents by Inventor Fabienne Howe

Fabienne Howe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7572514
    Abstract: A process for production of an assembly including several silicone elements crosslinked by polyaddition of ?Si—H units onto ?Si-alkenyl (preferably ?Si-vinyl) units, the elements adhering to one another without detracting from their mechanical properties. The process includes: (I) forming (1st coating) a silicone element (i) with a liquid silicone preparation (i) containing polyorganosiloxanes (POS) A with ?Si-vinyl units, (POS) B with ?Si—H units, a platinum catalyst C; (II) crosslinking so that (i) has a surface density SD of unreacted, residual vinyl, per nm2, of 0.0100?SD?0.0040; (III) optionally repeating steps (I) and (II) n times to give n elements (i) that adhere to one another; (IV) forming (2nd coating) a silicone element (ii) with a liquid silicone preparation (ii) of the same type as described above; (v) crosslinking to give crosslinked (ii) that adheres to (i).
    Type: Grant
    Filed: June 17, 2003
    Date of Patent: August 11, 2009
    Assignee: Rhodia Chimie
    Inventors: Fabienne Howe, Alain Pouchelon
  • Patent number: 7151149
    Abstract: A non-drip, preferably self-adhesive, silicone elastomer composition crosslinkable by polyaddition, such as those polyorganosilanes (POS) bearing C2?C6?Si-alkenyl units and ?Si—H units but excluding fluorinated POS. The composition includes at least a thixotropic additive containing at least a fluorinated resin, preferably based on polyfluoroethylene (PTFE). The composition may be prepared from a Si—Vi polydimethylsiloxane (PDMS) and a Si—H PDMS crosslinked by platinum catalysis. Polytetrafluorethylene, a filler, particularly one containing silicone, optionally a ternary adherence promoter such as vinyltrimethosilane/glycidoxypropyltrimethoxysilane/butyl orthotitanate, and other typical additives may be added to the composition. The composition (not excluding the fluorinated POS as a possible constituent in the composition) may be used to produce joints in situ and/or as an adhesive, particularly in upholstery.
    Type: Grant
    Filed: April 7, 2000
    Date of Patent: December 19, 2006
    Assignee: Rhodia Chimie
    Inventors: Georges Barrandon, Fabienne Howe, Olivier Loubet, Bernard Moulin, Alain Pouchelon
  • Publication number: 20060046077
    Abstract: A process for production of an assembly including several silicone elements crosslinked by polyaddition of ?Si—H units onto ?Si-alkenyl (preferably ?Si-vinyl) units, the elements adhering to one another without detracting from their mechanical properties. The process includes: (I) forming (1st coating) a silicone element (i) with a liquid silicone preparation (i) containing polyorganosiloxanes (POS) A with ?Si-vinyl units, (POS) B with ?Si—H units, a platinum catalyst C; (II) crosslinking so that (i) has a surface density SD of unreacted, residual vinyl, per nm2, of 0.0100?SD?0.0040; (III) optionally repeating steps (I) and (II) n times to give n elements (i) that adhere to one another; (IV) forming (2nd coating) a silicone element (ii) with a liquid silicone preparation (ii) of the same type as described above; (v) crosslinking to give crosslinked (ii) that adheres to (i).
    Type: Application
    Filed: June 17, 2003
    Publication date: March 2, 2006
    Inventors: Fabienne Howe, Alain Pouchelon
  • Patent number: 6972313
    Abstract: The invention concerns a silicone composition cross-linkable by hydrosilylation into adhesive gel and absorber, characterized in that it comprises: (I) at least a polyorganosiloxane POS (I); (II) at least a polyorganosiloxane POS (II); (III) at least an adhesive promoter (III); (IV) hollow organic microspheres; (V) optionally at least a polyorganosiloxane POS (V) particularly useful as diluent of POS (I); (VI) an effective amount of hydrosilylation catalyst, preferably of the platinous type.
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: December 6, 2005
    Inventors: Fabienne Howe, Christian Pusineri
  • Publication number: 20050171278
    Abstract: The present invention relates to the use, for improving the longevity of moulds made of polycondensation-crosslinking silicone elastomer, of an additive capable of stabilizing the silicone elastomer of which the mould is made with respect to materials to be moulded and especially polyester resins. This stabilizer is based on silica pretreated with a silane. It is preferably a ground quartz treated with an alkyl silane.
    Type: Application
    Filed: February 28, 2003
    Publication date: August 4, 2005
    Inventors: Fabienne Howe, Jens Heilman
  • Patent number: 6762242
    Abstract: Silicone material crosslinkable into silicone elastomer by polyaddition reactions is described. A material is provided offering a compromise between the following characteristics: fluidity (in non-crosslinked state), hydrophilicity (in non-crosslinked or crossliked state) and high mechanical properties (in crosslinked state). The following materials are added to crosslinkable silicone material: (i) a reinforcing siliceous filler in the form of a suspension obtained by subjecting the filler to a treatment in two stages by an agent providing compatibility and by operating in the presence of a polyorganosiloxane with Si-alkenyl functions; and (ii) one or more non-ionic, ionic or amphoteric surfactants. Said silicone material is particularly useful for impressions, for example dental impressions and for making pads used in pad printing techniques.
    Type: Grant
    Filed: February 5, 2002
    Date of Patent: July 13, 2004
    Assignee: Rhodia Services
    Inventors: Marco Del Torto, Fabienne Howe, Alain Pouchelon, Christian Pusineri
  • Publication number: 20030144411
    Abstract: The invention concerns a silicone composition cross-linkable by hydrosilylation into adhesive gel and absorber, characterized in that it comprises: (I) at least a polyorganosiloxane POS (I); (II) at least a polyorganosiloxane POS (II); (III) at least an adhesive promoter (III); (IV) hollow organic microspheres; (V) optionally at least a polyorganosiloxane POS (V) particularly useful as diluent of POS (I); (VI) an effective amount of hydrosilylation catalyst, preferably of the platinous type.
    Type: Application
    Filed: October 4, 2002
    Publication date: July 31, 2003
    Inventors: Fabienne Howe, Christian Pusineri
  • Patent number: 6486237
    Abstract: The invention concerns a silicone composition cross-linkable by hydrosilylation into adhesive gel and absorber, characterized in that it comprises:(I) at least a polyorganosiloxane POS (I); (II) at least a polyorganosiloxane POS (II); (III) at least an adhesive promoter (III); (IV) hollow organic microspheres ; (V) optionally at least a polyorganosiloxane POS (V) particularly useful as diluent of POS (I); (VI) an effective amount of hydrosilylation catalyst, preferably of the platinous type.
    Type: Grant
    Filed: June 21, 2000
    Date of Patent: November 26, 2002
    Assignee: Rhodia Chimie
    Inventors: Fabienne Howe, Christian Pusineri
  • Patent number: 6462104
    Abstract: The invention concerns a method for preparing a silica suspension in a silicone matrix, said suspension capable of being used for producing organopolysiloxanes crosslinkable by polycondensation. The invention aims at seeking a technical compromise between the rheology of said compositions and the mechanical properties of the resulting crosslinked elastomers. As a solution, the invention discloses a method for preparing a silica suspension treated with organosilazane in a silicone material comprising a linear reactive polyorganosiloxane bearing for example at each chain end a hydroxy group.
    Type: Grant
    Filed: August 27, 2001
    Date of Patent: October 8, 2002
    Assignee: Rhodia Chimie
    Inventors: Dominique Canpont, Fabienne Howe, Alain Pouchelon
  • Patent number: 6455617
    Abstract: The invention concerns the use, for increasing the durability of moulds made of silicone elastomer crosslinkable by a poly addition or polycondensation reaction, of additive capable of stabilizing the silicone elastomer constituting the mold with respect to materials to be molded, of an additive selected among: (a) antioxidant additives comprising, in their structure additives containing at least one R—Sq—R′ group in which R and R′ are monovalent hydrocarbon groups with at least 3 carbon atoms or a monovalent hydrocarbon group with an ester bond or R and R′ together form a cycle, q being a whole number between 1 and 3 inclusively, (b) additives inhibitors of free radicals capable, in moulding conditions of generating radicals ═N—O; the invention concerns the synergistic combination of (a)+(b), the synergistic combination of (a) and/or (b) with phosphites (c), except for the use of bis(1-octyloxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate as only additive in a silic
    Type: Grant
    Filed: June 23, 2000
    Date of Patent: September 24, 2002
    Assignee: Rhodia Chimie
    Inventors: Michel Gay, Fabienne Howe, Christian Pusineri, Joëlle Viennet