Patents by Inventor Francis Lafaysse
Francis Lafaysse 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).
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Patent number: 8535478Abstract: The present invention relates to a high-performance silicone elastomer composition that is adhesive and that can be crosslinked at high temperature for the assembly of silicone-based substrates, both by platinum and peroxide catalysis, and that may lend itself to a strip conformation. The composition comprises at least one gum, one catalyst and one adhesion promoter of polyorganohydrogensiloxane type, the nature and the amount of said adhesion promoter having been chosen so that Si—H groups are in excess following the reaction for crosslinking the composition, so as to obtain a potential surface density of covalent Si— bonds with the silicone substrate to be bonded of at least one covalent Si— bond per 60 nm2.Type: GrantFiled: July 30, 2008Date of Patent: September 17, 2013Assignee: Bluestar Silicones France SASInventors: Alain Pouchelon, Francis Lafaysse
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Patent number: 8333867Abstract: The invention relates to a process for the adhesive bonding of fibrous supports using a silicone elastomer which is thermosetted by radical crosslinking using at least one peroxide. The silicone elastomer is inserted between the supports over at least a portion of the region of overlap of the supports, where the supports are held in contact in the region of overlap in an manner that prevents trapping of air at the interface between the supports. The supports containing the silicone elastomer are heated while in intimate contact to allow the adhesive bonding of the supports by crosslinking of the adhesive.Type: GrantFiled: May 5, 2004Date of Patent: December 18, 2012Assignee: Bluestar Silicones France SASInventors: Alain Pouchelon, Maryline Quemin, Laurent Dumont, Francis Lafaysse
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Publication number: 20120183698Abstract: Silicone compositions, particularly for the production of anti-fouling varnishes which may be applied to flexible or bulk supports to provide an anti-fouling silicone varnish for textiles coated with elastomeric silicones which is economical, adhesive, low-slip and glossy; these are crosslinked silicone compositions comprising: A. at least one alkenylsilane, B. at least one catalytic system which comprises: B/1 at least one organometallic condensation catalyst, B/2 at least one metal M chelate and/or one metal alkoxide of general formula M(OJ)n, wherein n=valence of M and J=linear or branched C1-C8 alkyl radical, M being selected from among: Ti, Zr, Ge and Al, C. at least one ultrafine filler, D. optionally, at least one arylsilane other than A. E. optionally, at least one other silane other than A. and other than D., F. optionally, at least one thickening agent and G. optionally, at least one functional additive.Type: ApplicationFiled: January 20, 2012Publication date: July 19, 2012Applicant: Rhodia ChimieInventors: Marilyne QUEMIN, Laurent DUMONT, Francis LAFAYSSE
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Patent number: 8153206Abstract: Silicone compositions, particularly for the production of anti-fouling varnishes which may be applied to flexible or bulk supports to provide an anti-fouling silicone varnish for textiles coated with elastomeric silicones which is economical, adhesive, low-slip and glossy; these are crosslinked silicone compositions comprising: A. at least one alkenylsilane, B. at least one catalytic system which comprises: B/1 at least one organometallic condensation catalyst, B/2 at least one metal M chelate and/or one metal alkoxide of general formula M(OJ)n, wherein n=valence of M and J=linear or branched C1-C8 alkyl radical, M being selected from among: Ti, Zr, Ge and Al, C. at least one ultrafine filler, D. optionally, at least one arylsilane other than A. E. optionally, at least one other silane other than A. and other than D., F. optionally, at least one thickening agent and G. optionally, at least one functional additive.Type: GrantFiled: February 6, 2008Date of Patent: April 10, 2012Assignee: Bluestar Silicones France SASInventors: Marilyne Quemin, Laurent Dumont, Francis Lafaysse
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Patent number: 7935386Abstract: An aqueous polyorganosiloxane (POS) emulsion which can easily be deposited on/applied to a fibrous substrate at high speed and at limited deposition rates, for example less than 40 g/m2. The emulsion contains (A) a POS with ?Si-vinyl units, (B) a POS with ?SiH units, (C) an adhesion promoter, (D) a catalyst, (E) at least one surfactant, (F) optionally a POS resin with ?Si-vinyl units, (G) optionally a crosslinking inhibitor, (H) optionally a pH fixing agent, (I) optionally a formulating additive, (J) optionally a filler, and (K) water. Adhesion promoter (C) is selected from protective hydrocolloids, hydroxylated silanes and/or POS carrying at least one hydroxyl group and at least one salified amino group per molecule, and mixtures thereof, and is present in the range from 0.005 to 10% by weight, based on the silicone phase. Also disclosed is the corresponding coating process and the coated substrate.Type: GrantFiled: February 1, 2008Date of Patent: May 3, 2011Assignee: Rhodia ChimieInventors: Laurent Dumont, Michel Feder, Francis Lafaysse, Sylvie Robelin
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Anti-fouling cationically crosslinkable varnish compositions and support substrates coated therewith
Patent number: 7868056Abstract: Silicone compositions particularly useful for the production of anti-fouling varnishes for application to support substrates, these providing an anti-fouling varnish for textiles covered with silicone elastomers which is economical, adhesive, non-slip and glossy; the subject varnishes comprise a crosslinkable silicone composition containing, per 100 parts by weight: 1, at least 80 parts by weight of: (1.1), 2., 0.1 to 10 parts of weight of: (1.2), 3., 0 to 10 parts by weight of at least one polydimethylisiloxane (PDMS) acrylate or epoxide, 4., 0 to 10 parts by weight of at least one silylated compound which includes at least one ultrafine filler, 7., 0 to 10 parts by weight of at least one thickener, and 8., 0 to 10 parts by weigh of at least one additional functional additive.Type: GrantFiled: January 9, 2009Date of Patent: January 11, 2011Assignee: Bluestar Silicones FranceInventors: Francis Lafaysse, Pierre Luciani, Didier Dhaler, Laurent Dumont, Jean-Marc Frances -
Publication number: 20100282410Abstract: The present invention relates to a high-performance silicone elastomer composition that is adhesive and that can be crosslinked at high temperature for the assembly of silicone-based substrates, both by platinum and peroxide catalysis, and that may lend itself to a strip conformation. The composition comprises at least one gum, one catalyst and one adhesion promoter of polyorganohydrogensiloxane type, the nature and the amount of said adhesion promoter having been chosen so that Si—H groups are in excess following the reaction for crosslinking the composition, so as to obtain a potential surface density of covalent Si— bonds with the silicone substrate to be bonded of at least one covalent Si— bond per 60 nm2.Type: ApplicationFiled: July 30, 2008Publication date: November 11, 2010Applicant: BLUESTAR SILICONES FRANCE SASInventors: Alain Pouchelon, Francis Lafaysse
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Anti-fouling cationically crosslinkable varnish compositions and support substrates coated therewith
Patent number: 7790785Abstract: Silicone compositions particularly useful for the production of anti-fouling varnishes for application to support substrates, these providing an anti-fouling varnish for textiles covered with silicone elastomers which is economical, adhesive, non-slip and glossy; the subject varnishes comprise a crosslinkable silicone composition containing, per 100 parts by weight: 1, at least 80 parts by weight of: (1.1), 2., 0.1 to 10 parts of weight of: (1.2), 3., 0 to 10 parts by weight of at least one polydimethylisiloxane (PDMS) acrylate or epoxide, 4., 0 to 10 parts by weight of at least one silylated compound which includes at least one ultrafine filler, 7., 0 to 10 parts by weight of at least one thickener, and 8., 0 to 10 parts by weigh of at least one additional functional additive.Type: GrantFiled: June 27, 2005Date of Patent: September 7, 2010Assignee: Rhodia ChimieInventors: Francis Lafaysse, Pierre Luciani, Didier Dhaler, Laurent Dumont, Jean-Marc Frances -
Publication number: 20100178517Abstract: A method for obtaining a cross-linked fibrous material/silicone elastomer composite and the composite for textile architecture. The method avoids capillary ascension, preserves cohesion of the coated textile, and limits delamination between different silicone layers. The method comprises, in order: 1) coating one face of the textile substrate with a first liquid, silicone composition cross-linkable into an elastomer with a dynamic viscosity before cross-linking of between 5000 and 200000 mPa·s at 25° C.; 2) cross-linking the first liquid silicone composition; 3) coating the other face with a second liquid, silicone composition cross-linkable into an elastomer, said second silicone composition having a dynamic viscosity before cross-linking lower than or equal to 2000 mPa·s at 25° C.Type: ApplicationFiled: April 3, 2008Publication date: July 15, 2010Applicant: BLUESTAR SILICONES FRANCEInventors: Alain Pouchelon, Francis Lafaysse
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Patent number: 7642331Abstract: A hydrosilylation (polyaddition)-vulcanizing elastomer silicone composition, including (a) a vinylated polyorganosiloxane (POS), (b) at least one hydrogenated POS, (c) a platinum catalyst, (d) optionally a coupling agent, (e) optionally a mineral filler, (f) optionally a crosslinking inhibitor, and optionally a POS resin and functional additives. The composition has a dynamic viscosity between 1,000 and 7,000 mPa·s, at 25° C. before crosslinking and, after overall crosslinking by thermal effect has at least one of the following properties: a Shore A hardness of at least 2, a breaking strength of at least 0.5 N·mm?1, and a breaking elongation of at least 50%. Also disclosed is a composite which is fully impregnated by means of a 100% bicomponent (RTV-2) silicone liquid.Type: GrantFiled: July 16, 2003Date of Patent: January 5, 2010Assignee: Rhodia ChimieInventors: Alain Pouchelon, Maryline Quemin, Francis Lafaysse
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Publication number: 20090298367Abstract: The present invention relates to an article comprising at least one fibrous support surface coated by at least two successive layers of silicone type.Type: ApplicationFiled: December 15, 2006Publication date: December 3, 2009Applicant: RHODIA RECHERCHE ET TECHNOLOGIESInventors: Francis Lafaysse, Laurent Dumont, Bertrand Bordes
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Anti-fouling cationically crosslinkable varnish compositions and support substrates coated therewith
Publication number: 20090186224Abstract: Silicone compositions particularly useful for the production of anti-fouling varnishes for application to support substrates, these providing an anti-fouling varnish for textiles covered with silicone elastomers which is economical, adhesive, non-slip and glossy; the subject varnishes comprise a crosslinkable silicone composition containing, per 100 parts by weight: 1, at least 80 parts by weight of: (1.1), 2., 0.1 to 10 parts of weight of: (1.2), 3., 0 to 10 parts by weight of at least one polydimethylisiloxane (PDMS) acrylate or epoxide, 4., 0 to 10 parts by weight of at least one silylated compound which includes at least one ultrafine filler, 7., 0 to 10 parts by weight of at least one thickener, and 8., 0 to 10 parts by weigh of at least one additional functional additive.Type: ApplicationFiled: January 9, 2009Publication date: July 23, 2009Applicant: RHODIA CHIMIEInventors: Francis Lafaysse, Pierre Luciani, Didier Dhaler, Laurent Dumont, Jean-Marc Frances -
Publication number: 20080311810Abstract: Silicone compositions, particularly for the production of anti-fouling varnishes which may be applied to flexible or bulk supports to provide an anti-fouling silicone varnish for textiles coated with elastomeric silicones which is economical, adhesive, low-slip and glossy; these are crosslinked silicone compositions comprising: A. at least one alkenylsilane, B. at least one catalytic system which comprises: B/1 at least one organometallic condensation catalyst, B/2 at least one metal M chelate and/or one metal alkoxide of general formula M(OJ)n, wherein n=valence of M and J=linear or branched C1-C8 alkyl radical, M being selected from among: Ti, Zr, Ge and Al, C. at least one ultrafine filler, D. optionally, at least one arylsilane other than A. E. optionally, at least one other silane other than A. and other than D., F. optionally, at least one thickening agent and G. optionally, at least one functional additive.Type: ApplicationFiled: February 6, 2008Publication date: December 18, 2008Applicant: RHODIA CHIMIEInventors: Marilyne Quemin, Laurent Dumont, Francis Lafaysse
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Publication number: 20080207827Abstract: An aqueous polyorganosiloxane (POS) emulsion which can easily be deposited on/applied to a fibrous substrate at high speed and at limited deposition rates, for example less than 40 g/m2. The emulsion contains (A) a POS with ?Si-vinyl units, (B) a POS with ?SiH units, (C) an adhesion promoter, (D) a catalyst, (E) at least one surfactant, (F) optionally a POS resin with ?Si-vinyl units, (G) optionally a crosslinking inhibitor, (H) optionally a pH fixing agent, (I) optionally a formulating additive, (J) optionally a filler, and (K) water. Adhesion promoter (C) is selected from protective hydrocolloids, hydroxylated silanes and/or POS carrying at least one hydroxyl group and at least one salified amino group per molecule, and mixtures thereof, and is present in the range from 0.005 to 10% by weight, based on the silicone phase. Also disclosed is the corresponding coating process and the coated substrate.Type: ApplicationFiled: February 1, 2008Publication date: August 28, 2008Inventors: Laurent Dumont, Michel Feder, Francis Lafaysse, Sylvie Robelin
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Publication number: 20070261790Abstract: The invention relates to the adhesive bonding of fibrous materials, in particular of flexible supports, such as woven supports or nonwoven supports, comprising at least one silicone coating obtained by the application of a coat or by impregnation. The aim of the invention is to provide an improved process for combining together fiber/silicone composite parts using a silicone elastomer, which process has to be economical and not very expensive to carry out. This aim is achieved by the invention, which relates to a process for the adhesive bonding of fibrous supports, this process being of the type of those consisting in causing the supports to be adhesively bonded to overlap one another, a silicone-based adhesive thermosetting by radical crosslinking using at least one peroxide being inserted between the supports over at least a portion of the region of overlap.Type: ApplicationFiled: May 5, 2004Publication date: November 15, 2007Applicant: RHODIA CHIMIEInventors: Alain Pouchelon, Maryline Quemin, Laurent Dumont, Francis Lafaysse
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Publication number: 20060142523Abstract: A hydrosilylation (polyaddition)-vulcanizing elastomer silicone composition, including (a) a vinylated polyorganosiloxane (POS), (b) at least one hydrogenated POS, (c) a platinum catalyst, (d) optionally a coupling agent, (e) optionally a mineral filler, (f) optionally a crosslinking inhibitor, and optionally a POS resin and functional additives. The composition has a dynamic viscosity between 1,000 and 7,000 mPa·s, at 25° C. before crosslinking and, after overall crosslinking by thermal effect has at least one of the following properties: a Shore A hardness of at least 2, a breaking strength of at least 0.5 N·mm?1, and a breaking elongation of at least 50%. Also disclosed is a composite which is fully impregnated by means of a 100% bicomponent (RTV-2) silicone liquid.Type: ApplicationFiled: July 16, 2003Publication date: June 29, 2006Inventors: Alain Pouchelon, Maryline Quemin, Francis Lafaysse
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Anti-fouling cationically crosslinkable varnish compositions and support substrates coated therewith
Publication number: 20060039889Abstract: Silicone compositions particularly useful for the production of anti-fouling varnishes for application to support substrates, these providing an anti-fouling varnish for textiles covered with silicone elastomers which is economical, adhesive, non-slip and glossy; the subject varnishes comprise a crosslinkable silicone composition containing, per 100 parts by weight: 1, at least 80 parts by weight of: (1.1), 2., 0.1 to 10 parts of weight of: (1.2), 3., 0 to 10 parts by weight of at least one polydimethylisiloxane (PDMS) acrylate or epoxide, 4., 0 to 10 parts by weight of at least one silylated compound which includes at least one ultrafine filler, 7., 0 to 10 parts by weight of at least one thickener, and 8., 0 to 10 parts by weigh of at least one additional functional additive.Type: ApplicationFiled: June 27, 2005Publication date: February 23, 2006Applicant: RHODIA CHIMIEInventors: Francis Lafaysse, Pierre Luciani, Didier Dhaler, Laurent Dumont, Jean-Marc Frances -
Publication number: 20060019106Abstract: Silicone compositions, particularly for the production of anti-fouling varnishes which may be applied to flexible or bulk supports to provide an anti-fouling silicone varnish for textiles coated with elastomeric silicones which is economical, adhesive, low-slip and glossy; these are crosslinked silicone compositions comprising: A. at least one alkenylsilane, B. at least one catalytic system which comprises: B/1 at least one organometallic condensation catalyst, B/2 at least one metal M chelate and/or one metal alkoxide of general formula M(OJ)n, wherein n=valence of M and J=linear or branched C1-C8 alkyl radical, M being selected from among: Ti, Zr, Ge and Al, C. at least one ultrafine filler, D. optionally, at least one arylsilane other than A. E. optionally, at least one other silane other than A. and other than D., F. optionally, at least one thickening agent and G. optionally, at least one functional additive.Type: ApplicationFiled: June 27, 2005Publication date: January 26, 2006Applicant: RHODIA CHIMIEInventors: Marilyne Quemin, Laurent Dumont, Francis Lafaysse