Patents by Inventor Robert Alan Ekeland
Robert Alan Ekeland 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: 9175198Abstract: Silicone pressure sensitive adhesive (PSA) compositions and methods for their preparation are provided. In one embodiment, PSAs are formed from a silicone polymer mixture by condensation polymerization of low viscosity polyorganosiloxanes in inert solvents and/or silicone fluids, and optionally adding a silicone resin (MQ) during polymerization. The silicone polymer mixture formed may also be mixed with a silicone resin (MQ) and bodying catalyst, and bodying is allowed to continue until the desired reaction product is formed.Type: GrantFiled: December 20, 2013Date of Patent: November 3, 2015Assignee: DOW CORNING CORPORATIONInventors: Stephen Edward Cray, Delphine Davio, Robert Alan Ekeland, Andreas Stammer
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Patent number: 9051428Abstract: The invention relates to branched organopolysiloxanes and to their preparation and use. A branched organopolysiloxane is prepared by the reaction of an alkoxysilane with a substantially linear organopolysiloxane containing at least one hydroxyl or hydrolysable group bonded to silicon, in the presence of a phosphazene catalyst. The branched organopolysiloxanes obtained can be suitable for use in a moisture curable sealant composition capable of curing to a high modulus seal, with less tendency to gel than when using other siloxane polycondensation catalysts. Phosphazene catalysts also have the advantage that the content of undesired low molecular weight cyclic silicones in the polymerization product is low.Type: GrantFiled: March 30, 2010Date of Patent: June 9, 2015Assignee: Dow Corning CorporationInventors: Delphine Davio, Robert Alan Ekeland, Andreas Stammer, Giada Tonet
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Publication number: 20140114029Abstract: Silicone pressure sensitive adhesive (PSA) compositions and methods for their preparation are provided. In one embodiment, PSAs are formed from a silicone polymer mixture by condensation polymerization of low viscosity polyorganosiloxanes in inert solvents and/or silicone fluids, and optionally adding a silicone resin (MQ) during polymerization. The silicone polymer mixture formed may also be mixed with a silicone resin (MQ) and bodying catalyst, and bodying is allowed to continue until the desired reaction product is formed.Type: ApplicationFiled: December 20, 2013Publication date: April 24, 2014Inventors: Stephen Edward Cray, Delphine Davio, Robert Alan Ekeland, Andreas Stammer
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Patent number: 8618234Abstract: Silicone-based pressure-sensitive adhesive composition comprising 100 parts (A) a branched organopolysiloxane having on molecular terminals at least two alkenyl groups and represented by (R3SiO1/2)4-p(R1R2SiO1/2)p(R2SiO)m(RR1SiO)n(SiO4/2), to 400 parts (B) an organopolysiloxane composed of R3R22SiO1/2 units and SiO4/2 units, (C) an organohydrogenpolysiloxane, and a catalytic quantity of (D) a platinum-type catalyst. Pressure-sensitive adhesive tape or sheet having an adhesive layer in the form of a cured layer of the aforementioned composition.Type: GrantFiled: August 22, 2008Date of Patent: December 31, 2013Assignees: Dow Corning Corporation, Dow Corning Toray Company, Ltd.Inventors: Haruna Mizuno, Robert Alan Ekeland, Seiji Hori, Takateru Yamada
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Patent number: 8372497Abstract: Air bags which are used for safety purposes to protect occupants of vehicles such as automobiles are described together with a process for coating air bags and air bag fabrics with silicone rubber compositions.Type: GrantFiled: December 27, 2010Date of Patent: February 12, 2013Assignee: Dow Corning CorporationInventors: William Blackwood, Robert Alan Ekeland, Randall Paul Sweet
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Publication number: 20120301644Abstract: Air bags which are used for safety purposes to protect occupants of vehicles such as automobiles are described together with a process for coating air bags and air bag fabrics with silicone rubber compositions.Type: ApplicationFiled: December 27, 2010Publication date: November 29, 2012Inventors: William Blackwood, Robert Alan Ekeland, Randall Paul Sweet
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Publication number: 20120172543Abstract: Silicone pressure sensitive adhesive (PSA) compositions and methods for their preparation are provided. In one embodiment, PSAs are formed from a silicone polymer mixture by condensation polymerization of low viscosity polyorganosiloxanes in inert solvents and/or silicone fluids, and optionally adding a silicone resin (MQ) during polymerization. The silicone polymer mixture formed may also be mixed with a silicone resin (MQ) and bodying catalyst, and bodying is allowed to continue until the desired reaction product is formed.Type: ApplicationFiled: August 24, 2010Publication date: July 5, 2012Inventors: Stephen Edward Cray, Delphine Davio, Robert Alan Ekeland, Andreas Stammer
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Publication number: 20120022210Abstract: The invention relates to branched organopolysiloxanes and to their preparation and use. A branched organopolysiloxane is prepared by the reaction of an alkoxysilane with a substantially linear organopolysiloxane containing at least one hydroxyl or hydrolysable group bonded to silicon, in the presence of a phosphazene catalyst. The branched organopolysiloxanes obtained can be suitable for use in a moisture curable sealant composition capable of curing to a high modulus seal, with less tendency to gel than when using other siloxane polycondensation catalysts. Phosphazene catalysts also have the advantage that the content of undesired low molecular weight cyclic silicones in the polymerisation product is low.Type: ApplicationFiled: March 30, 2010Publication date: January 26, 2012Inventors: Delphine Davio, Robert Alan ` Ekeland, Andreas Stammer, Giada Tonet
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Publication number: 20110287267Abstract: A solventless cured release coating-forming organopolysiloxane composition having a viscosity at 25° C. of 50 to 2,000 mPa·s comprising (A) 100 weight parts of an alkenyl-functional diorganopolysiloxane that has a viscosity of 25 to 1,000 mPa·s; (B) 0.5 to 15 weight parts of a diorganopolysiloxane that has a viscosity of at least 10,000 mPa·s and that has an aliphatically unsaturated group content of no more than 0.1 mole %; (C) 0.5 to 5 weight parts of a branched organopolysiloxane that has more than one SiO4/2 unit and that is a polymer product provided by an equilibration polymerization between a branched organosiloxane oligomer represented by the average siloxane unit formula (1) (SiO4/2)(RaRb2SiO1/2)x(1) and a diorganosiloxane oligomer; (D) a specific amount of an organohydrogenpolysiloxane that has a viscosity of 1 to 1,000 mPa·s; and (E) a hydrosilylation reaction catalyst in a catalytic quantity.Type: ApplicationFiled: November 26, 2009Publication date: November 24, 2011Inventors: Seiji Hori, Takateru Yamada, Robert Alan Ekeland
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Publication number: 20110097579Abstract: Silicone-based pressure-sensitive adhesive composition comprising 100 parts (A) a branched organopolysiloxane having on molecular terminals at least two alkenyl groups and represented by (R3SiO1/2)4-p(R1R2SiO1/2)p(R2,SiO)m(RR1SiO)n(SiO4/2), to 400 parts (B) an organopolysiloxane composed of R3R2SiO1/2 units and SiO4/2 units, (C) an organohydrogenpolysiloxane, and a catalytic quantity of (D) a platinum-type catalyst. Pressure-sensitive adhesive tape or sheet having an adhesive layer in the form of a cured layer of the aforementioned composition.Type: ApplicationFiled: August 22, 2008Publication date: April 28, 2011Inventors: Haruna Mizuno, Robert Alan Ekeland, Seiji Hori, Takateru Yamada
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Patent number: 7592412Abstract: A release coating composition according to the present invention comprises an alkenyl functional polysiloxane (1), a silicon hydride functional polysiloxane (11) and a catalyst (111) comprising a platinum group metal. The alkenyl functional polysiloxane (1) is an alkenylterminated polysiloxane prepared by siloxane polycondensation and/or equilibration using a phosphazene base catalyst followed by neutralisation with an acidic neutralising agent. The level of catalyst (III) in the composition can be as low as 2-40 parts per million platinum group metal by weight.Type: GrantFiled: July 2, 2004Date of Patent: September 22, 2009Assignee: Dow Corning CorporationInventors: Stephen Edward Cray, Robert Alan Ekeland, Peter Cheshire Hupfield, Sarah O'Hare, David A. Rich, Marc Thibaut
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Publication number: 20080300358Abstract: A composition for preparing a pressure sensitive adhesive contains (A) a hydroxyl-functional polydiorganosiloxane polymer, (B) a hydroxyl-functional polyorganosiloxane resin, and (C) a solvent. A continuous method for producing the silicone pressure sensitive adhesive is performed by mixing the composition while heating the composition at a temperature above the vaporization point of the solvent and removing essentially all volatile species in an apparatus with a residence time sufficient for bodying ingredients (A) and (B). A devolatilizing twin-screw extruder is useful in the method.Type: ApplicationFiled: November 17, 2006Publication date: December 4, 2008Inventors: Leon Neal Cook, Loren Dean Durfee, Robert Alan Ekeland, Tricia A. Hubbard, Loren Dale Lower, Jeff Alan Walkowiak
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Patent number: 6805914Abstract: This invention relates to silicone coating composition comprising a solventless silicone coating composition and a liquid silicone mist suppressant composition obtained by a method comprising reacting a large excess of at least one organohydrogensilicon compound containing at least three silicon-bonded hydrogen groups with at least one compound containing at least two alkenyl groups in the presence of a platinum group metal-containing catalyst.Type: GrantFiled: November 26, 2002Date of Patent: October 19, 2004Assignee: Dow Corning CorporationInventors: Joseph Norbert Clark, Robert Alan Ekeland, Michael Sean Owens, Paul Cornelius Van Dort
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Publication number: 20030120000Abstract: This invention relates to silicone coating composition comprising a solventless silicone coating composition and a liquid silicone mist suppressant composition obtained by a method comprising reacting a large excess of at least one organohydrogensilicon compound containing at least three silicon-bonded hydrogen groups with at least one compound containing at least two alkenyl groups in the presence of a platinum group metal-containing catalyst.Type: ApplicationFiled: November 26, 2002Publication date: June 26, 2003Inventors: Joseph Norbert Clark, Robert Alan Ekeland, Michael Sean Owens, Paul Cornelius Van Dort
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Patent number: 6489407Abstract: This invention relates to silicone coating composition comprising a solventless silicone coating composition and a liquid silicone mist suppressant composition obtained by a method comprising reacting a large excess of at least one organohydrogensilicon compound containing at least three silicon-bonded hydrogen groups with at least one compound containing at least two alkenyl groups in the presence of a platinum group metal-containing catalyst.Type: GrantFiled: June 22, 2000Date of Patent: December 3, 2002Assignee: Dow Corning CorporationInventors: Joseph Norbert Clark, Robert Alan Ekeland, Michael Sean Owens, Paul Cornelius Van Dort
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Patent number: 5958448Abstract: A method of entrapping a water-soluble substance in vesicles formed from a surface active siloxane is carried out by dissolving the substance to be entrapped in water, adding the surface active siloxane, mildly agitating the mixture, and removing excess water and substance. Water-insoluble substances are entrapped in the vesicles by dissolving the substance to be entrapped in the surface active siloxane, and mildly agitating the substance and the siloxane. The surface active siloxanes consist essentially of tetravalent SiO.sub.2 units, and monovalent R.sub.3 SiO.sub.1/2 and R'R.sub.2 SiO.sub.1/2 units. The ratio of monovalent units to tetravalent units is from 0.4/1 to 2/1, and from 40 to 90% of all monovalent units are R'R.sub.2 SiO.sub.1/2 units. R is a monovalent hydrocarbon group with up to eight carbon atoms, and R' is a polyoxyalkylene group.Type: GrantFiled: January 13, 1995Date of Patent: September 28, 1999Assignee: Dow Corning CorporationInventors: Robert Alan Ekeland, Randal Myron Hill
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Patent number: 5708075Abstract: The present invention relates to a curable silicone release coating composition comprising (A) an organopolysiloxane having at least two alkenyl groups per molecule, (B) an organohydrogensiloxane having at least two silicon-bonded hydrogen atoms per molecule, (C) a siloxane resin having silicon-bonded hydrogen groups, (D) a platinum group metal-containing catalyst, and optionally (E) an inhibitor. The compositions of this invention are useful as release coatings for pressure sensitive adhesives.Type: GrantFiled: December 30, 1996Date of Patent: January 13, 1998Assignee: Dow Corning CorporationInventors: Kyuha Chung, Robert Alan Ekeland, Randall Gene Schmidt