Patents by Inventor Laurent Dumont
Laurent Dumont 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: 8828551Abstract: The general field of the invention is that of airbags. The invention relates to a process for improving the tear strength and the combing strength of coated fabrics intended for uses in the field of inflatable bags, using a silicone composition comprising an additive consisting of a polyorganosiloxane resin (V) and a calcium carbonate. After coating the composition onto the fabric supports and curing, the coated supports not only have optimum adhesion and crease resistance properties, but also have good properties in terms of combing strength and tear strength.Type: GrantFiled: July 25, 2012Date of Patent: September 9, 2014Assignee: Bluestar Silicones France SASInventors: Laurent Dumont, Alain Pouchelon
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Patent number: 8440311Abstract: The general field of the invention is that of airbags. The invention relates to a process for improving the tear strength and the combing strength of coated fabrics intended for uses in the field of inflatable bags using a silicone composition comprising an additive containing a polyorganosiloxane resin (V) and a calcium carbonate. After coating the composition onto the fabric supports and curing, the coated supports not only have optimum adhesion and crease resistance properties, but also have good properties in terms of combing strength and tear strength.Type: GrantFiled: October 2, 2008Date of Patent: May 14, 2013Assignee: Bluestar Silicones France SASInventors: Laurent Dumont, Alain Pouchelon
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Patent number: 8431647Abstract: The present invention relates to a cross-linkable adhesive silicone composition, having a very short cross-linking time and capable of providing an adhesive having mechanical properties sufficient so that it can be used as an adhesive joint and provide waterproofing of a seam joining two substrates. Such a composition comprises: (A) at least a polyorganosiloxane (POSA) having, for each molecule, at least two alkenyl groups, preferably, C2-C6 linked to silicon; (B) at least one polyorganosiloxane cross-linking agent having, for each molecule, at least two hydrogen atoms linked to silicon; (C) a catalytically efficient amount of at least one catalyst containing at least one metallic compound, preferably platinum; (D) a reinforcing mineral filler; and is characterized in that it also comprises at least one polyorganosiloxane (POS A?) gum having a weight content of alkenyl(s) group(s), preferably vinyl(s), between 0.001% and 0.2%, and having a consistency of between 300 and 1200 at 25° C.Type: GrantFiled: May 27, 2010Date of Patent: April 30, 2013Assignee: Bluestar Silicones France SASInventors: Laurent Dumont, Bertrand Bordes
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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: 20120289111Abstract: The general field of the invention is that of airbags. The invention relates to a process for improving the tear strength and the combing strength of coated fabrics intended for uses in the field of inflatable bags, using a silicone composition comprising an additive consisting of a polyorganosiloxane resin (V) and a calcium carbonate. After coating the composition onto the fabric supports and curing, the coated supports not only have optimum adhesion and crease resistance properties, but also have good properties in terms of combing strength and tear strength.Type: ApplicationFiled: July 25, 2012Publication date: November 15, 2012Applicant: Bluestar Silicones FranceInventors: Laurent DUMONT, Alain POUCHELON
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Patent number: 8257797Abstract: The general field of the invention is that of airbags. The invention relates to a process for improving the tear strength and the combing strength of coated fabrics intended for uses in the field of inflatable bags using a silicone composition comprising an additive containing a polyorganosiloxane resin (V) and a calcium carbonate. After coating the composition onto the fabric supports and curing, the coated supports not only have optimum adhesion and crease resistance properties, but also have good properties in terms of combing strength and tear strength.Type: GrantFiled: November 2, 2004Date of Patent: September 4, 2012Assignee: Bluestar Silicones FranceInventors: Laurent Dumont, Alain Pouchelon
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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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Publication number: 20110018235Abstract: The present invention relates to a cross-linkable adhesive silicone composition, having a very short cross-linking time and capable of providing an adhesive having mechanical properties sufficient so that it can be used as an adhesive joint and provide waterproofing of a seam joining two substrates. Such a composition comprises: (A) at least a polyorganosiloxane (POSA) having, for each molecule, at least two alkenyl groups, preferably, C2-C6 linked to silicon; (B) at least one polyorganosiloxane cross-linking agent having, for each molecule, at least two hydrogen atoms linked to silicon; (C) a catalytically efficient amount of at least one catalyst containing at least one metallic compound, preferably platinum; (D) a reinforcing mineral filler; and is characterized in that it also comprises at least one polyorganosiloxane (POS A?) gum having a weight content of alkenyl(s) group(s), preferably vinyl(s), between 0.001% and 0.2%, and having a consistency of between 300 and 1200 at 25° C.Type: ApplicationFiled: May 27, 2010Publication date: January 27, 2011Applicant: BLUESTAR SILICONES FRANCEInventors: Laurent DUMONT, Bertrand BORDES
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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 -
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: 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: 20090026745Abstract: The general field of the invention is that of airbags. The invention relates to a process for improving the tear strength and the combing strength of coated fabrics intended for uses in the field of inflatable bags using a silicone composition comprising an additive containing a polyorganosiloxane resin (V) and a calcium carbonate. After coating the composition onto the fabric supports and curing, the coated supports not only have optimum adhesion and crease resistance properties, but also have good properties in terms of combing strength and tear strength.Type: ApplicationFiled: October 2, 2008Publication date: January 29, 2009Applicant: RHODIA CHEMIEInventors: Laurent Dumont, Alain Pouchelon
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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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Patent number: 7423234Abstract: A process for increasing the surface tension (“wettability”) of a silicone element crosslinked by polyaddition from a liquid composition containing one or more ?,?-dimethylvinylpolydimethylsiloxanes (PDMS), one or more poly(dimethyl)(methylhydrogenosiloxy)-?,?-dimethylhydrogenosiloxanes, and a platinum crosslinking catalyst. The silicone surface is treated with a homogeneous atmospheric plasma using a plasma spraying apparatus having a rotating head with one or more plasma nozzles that are offset relative to the axis of rotation, each one being capable of generating a plasma jet whose axis is parallel to said axis of rotation. The articles to which the invention relate include composites of flexible substrate (e.g. textile)/silicone coating. Application: adhesive bonding of silicone surfaces crosslinked by ?Si—H/?Si-vinyl polyaddition.Type: GrantFiled: June 17, 2003Date of Patent: September 9, 2008Assignee: Rhodia ChimieInventors: Laurent Dumont, Alain Pouchelon
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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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Patent number: 7198854Abstract: A silicone composition useful especially for the production of varnishes applicable to substrates whose coefficient of friction it is sought to reduce. The object is to provide an anti-friction silicone varnish for textiles coated with silicone elastomers which is economic and adhesive, provides the desired slip, resists soiling and is shiny. This object is achieved by a crosslinkable silicone composition containing two silicones A and B which react with one another in the presence of a catalyst C to allow crosslinking, and a particulate component D selected from the group comprising powdered (co)polyamides—preferably (co)polyamides 6, 12 and 6/12. The (co)polyamide particles are of substantially rounded shape and the mean particle diameter ?md is between 0.1 and 200 ?m, preferably between 5 and 100 ?m and particularly preferably between 10 and 50 ?m. Also disclosed is a varnishing process and a composite containing the varnished substrate.Type: GrantFiled: June 17, 2003Date of Patent: April 3, 2007Assignee: Rhodia ChimieInventors: Laurent Dumont, Alain Pouchelon, Marilyne Quemin