Cellulosic Base Patents (Class 427/303)
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Patent number: 11198230Abstract: The present disclosure relates to use of an aqueous dispersion of siloxane for reducing grain puffing of a wood substrate and an article comprising an anti grain puffing coating. The article comprises (a) a wood substrate having at least one major surface; (b) an anti grain puffing coating directly applied on the major surface of the wood substrate, formed from an aqueous dispersion of siloxane; and (c) one or more coatings applied on the anti grain puffing coating, formed from an aqueous coating composition, wherein the siloxane contains one or more hydrophobic group and one or more hydrophilic group chemically bonded to its molecule skeleton; and wherein the siloxane has a particle size in the range of 5 to 100 nm.Type: GrantFiled: January 11, 2018Date of Patent: December 14, 2021Assignee: SWIMC LLCInventors: Gang Duan, Shigang Fan
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Publication number: 20150020985Abstract: A process for improving the wet strength of paper or paperboard is disclosed, and compositions, methods, and products related to improved wet strength paper or paperboard are provided. The process includes, for example, contacting at least one side of the paper or paperboard with water or an aqueous composition to wet the paper or paperboard, contacting the wet paper or paperboard with a wet strength resin composition followed by drying the paper or paperboard. The resulted treated or coated paper or paperboard has comparable wet strength properties to that of paper or paperboard containing wet strength resin from a conventional wet end application.Type: ApplicationFiled: July 9, 2014Publication date: January 22, 2015Inventors: Gregg A. Reed, William J. Haskins, Lakeisha D. Talbert
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Patent number: 8852688Abstract: The invention concerns a method for producing removable surface protection by the application of a curable, liquid coating composition (liquid film), in which the surface is treated using water, or an aqueous solution of surface-active agents, and the coating composition is subsequently applied. Preferably, the surface is the topcoat of a motor vehicle. The invention further relates to the use of water or aqueous solutions of surface-active agents in such a method. Finally, the invention also relates to a removable surface protection coating of this nature. According to the invention, the flow of the coating composition into a uniform film is improved.Type: GrantFiled: October 1, 2007Date of Patent: October 7, 2014Assignee: Mankiewicz Gebr. & Co., (GmbH & Co. KG)Inventor: Michael Grau
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Patent number: 8273435Abstract: Disclosed herein is an environmentally safe, grease and/or adhesion resistant article comprising an absorbent substrate, a cross-linking agent, and a polymer; wherein the substrate is first coated with the cross-linking agent and is then coated with the polymer.Type: GrantFiled: August 20, 2010Date of Patent: September 25, 2012Assignee: Polymer Ventures, Inc.Inventors: Christopher B. Murphy, Jon O. Fabri, Robert P. Mahoney
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Patent number: 8197948Abstract: A furan polymer impregnated wood which is uniform in color and density throughout the treated zone. In order to obtain the polymer impregnated wood, a parent wood has been impregnated with a mixture containing polymerizable organic compounds of at least furfuryl alcohol and one further compound. The invention also relates to a method for preparing a furan polymer impregnated wood and uses thereof.Type: GrantFiled: March 2, 2010Date of Patent: June 12, 2012Assignee: Kebony ABInventor: Marc H. Schneider
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Publication number: 20120121887Abstract: The invention relates to a method for preparing a foam composite element, including the steps of preparing a top layer, applying an adhesion promoter layer to the top layer, wherein the adhesion promoter layer includes a modified isocyanate, and applying a foam layer including polyurethane and/or polyisocyanurate to the adhesion promoter layer. On application, the modified isocyanate in the adhesion promoter layer has a content of free isocyanate groups of from ?10% to ?29%. The invention further relates to the use of a modified isocyanate having a content of free isocyanate groups of ?10% to ?29% as an adhesion promoter in the preparation of foam composite elements and foam composite elements obtained by the method according to the invention.Type: ApplicationFiled: May 14, 2010Publication date: May 17, 2012Applicant: Bayer MaterialScience AGInventors: Johannes Van De Braak, Rene Abels, Rolf Roers, Peter Haas
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Publication number: 20110008619Abstract: Disclosed herein is an environmentally safe, grease and/or adhesion resistant article comprising an absorbent substrate, a cross-linking agent, and a polymer; wherein the substrate is first coated with the cross-linking agent and is then coated with the polymer.Type: ApplicationFiled: August 20, 2010Publication date: January 13, 2011Applicant: POLYMER VENTURES, INC.Inventors: Christopher B. Murphy, Jon O. Fabri, Robert P. Mahoney
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Publication number: 20100215858Abstract: A polyglycolic acid resin-based multilayer sheet is formed by laminating a biological polymer substrate sheet and a polyglycolic acid resin with each other via an aqueous adhesive layer. The multilayer sheet is formed of biodegradable materials as a whole and allows recovery of paper, etc. alone, as desired, by preferential decomposition of the resin, thus being suitable as a packaging material stock for food container, etc.Type: ApplicationFiled: April 21, 2010Publication date: August 26, 2010Applicant: KUREHA CORPORATIONInventors: Kazuyuki YAMANE, Yukichika Kawakami, Yuki Hokari
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Patent number: 7691444Abstract: The present invention relates to a method of using triadimefon and/or triadimenol as a preservative for the protection of glued wood-based products against attack and destruction of microorganisms, especially where the triadimefon and/or triadimenol is applied during the manufacturing process of the glued wood-based products. The invention further relates to a preservative composition for the protection of glued wood-based products including triadimefon and/or triadimenol and articles having such compositions as a part the article.Type: GrantFiled: December 17, 2003Date of Patent: April 6, 2010Assignee: LANXESS Deutschland GmbHInventors: Peter James Hayward, George William Mason, Thomas Jaetsch
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Publication number: 20090191344Abstract: Wood and wood products are rendered water repellant by treating the wood or wood product with a combination of compounds containing at least three amino groups at least one being a primary amino group, and a low surface tension ?-ketocarbonyl-functional siloxane polymer.Type: ApplicationFiled: August 6, 2007Publication date: July 30, 2009Inventor: Christian Herzig
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Patent number: 7056557Abstract: The present invention relates to a wood-polymer composite, particularly wood which has been impregnated with a mixture containing polymerizable organic compounds, and more particularly to a method for preparing a wood-polymer-composite by impregnating wood material and/or wood-based material with a mixture containing polymerizable organic compounds, and most particularly uses thereof.Type: GrantFiled: November 5, 2003Date of Patent: June 6, 2006Assignee: Wood Polymer Technologies ASAInventor: Marc H. Schneider
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Patent number: 6936083Abstract: A treated backing comprises a fabric and a composition that comprises epoxy resin preparable by reaction of epichlorohydrin with at least one of bisphenol A or bisphenol F, polyfunctional (meth)acrylate, dicyandiamide, and photoinitiator.Type: GrantFiled: December 10, 2004Date of Patent: August 30, 2005Assignee: 3M Innovative Properties CompanyInventors: Ernest L. Thurber, Don H. Kincaid
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Patent number: 6673395Abstract: The present invention relates to a wood-polymer composite, particularly wood which has been impregnated with a mixture containing polymerizable organic compounds, and more particularly to a method for preparing a wood-polymer-composite by impregnating wood material and/or wood-based material with a mixture containing polymerizable organic compounds, and most particularly uses thereof.Type: GrantFiled: January 18, 2001Date of Patent: January 6, 2004Assignee: Wood Polymer Technologies AsaInventor: Marc H. Schneider
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Patent number: 6645256Abstract: A solution for forming a graft substrate containing a graft initiator, a catalyst for activating the graft initiator, a polymerizable silicon softener, and at least one additional prepolymer, each of the softener and the prepolymer which includes a functional group for reaction with an activated site on the substrate for grafting thereto and water. The treated fiber exhibits excellent crockfastness, color fastness, and abrasion resistance, and has a soft hand.Type: GrantFiled: April 4, 2001Date of Patent: November 11, 2003Assignee: Healthtex Apparel Corp.Inventors: Mohan L. Sanduja, Carl Horowitz, Izabella Zilbert, Paul Thottathil, Gerald L. Williamson
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Patent number: 6645255Abstract: A solution for forming a graft substrate containing a graft initiator, a catalyst for activating the graft initiator, a polymerizable silicon softener, and at least one additional prepolymer, each of the softener and the prepolymer which includes a functional group for reaction with an activated site on the substrate for grafting thereto and water. The treated fiber exhibits excellent crockfastness, color fastness, and abrasion resistance, strength, and has a soft hand.Type: GrantFiled: April 4, 2001Date of Patent: November 11, 2003Assignee: Healthtex Apparel Corp.Inventors: Mohan L. Sanduja, Carl Horowitz, Izabella Zilbert, Paul Thottathil, Gerald L. Williamson
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Patent number: 6638319Abstract: A solution for forming a graft substrate containing a graft initiator, a catalyst for activating the graft initiator, a polymerizable silicon softener, and at least one additional prepolymer, each of the softener and the prepolymer which includes a functional group for reaction with an activated site on the substrate for grafting thereto and water. The treated fiber exhibits excellent crockfastness, color fastness, and abrasion resistance, and has a soft hand.Type: GrantFiled: April 4, 2001Date of Patent: October 28, 2003Assignee: Healthtex Apparel Corp.Inventors: Mohan L. Sanduja, Carl Horowitz, Izabella Zilbert, Paul Thottathil, Gerald L. Williamson
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Patent number: 6620459Abstract: The disclosed invention relates to polyisocyanate-impregnated lignocellulosic substrates having improved strength, water resistance and appearance, and also to methods and systems for producing such substrates. The polyisocyanate-impregnated lignocellulosic substrate are produced by impregnating a lignocellulosic substrate with an isocyanate resin, followed by polymerization of the isocyanate resin by applying a heated liquid to the impregnated substrate.Type: GrantFiled: February 13, 2001Date of Patent: September 16, 2003Assignee: Houston Advanced Research CenterInventors: John Colvin, Charles Vignal, Philippe Edouard Tissot, Larry Raymond Crowe
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Publication number: 20030162030Abstract: The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to degradation by wetting and staining, and wood, to improve resistance to degradation, staining and warping.Type: ApplicationFiled: March 5, 2003Publication date: August 28, 2003Inventors: John Russell Crompton, James M. Donatello, Kiu-Seung Lee, Charles Winfield Stewart, Robert Clayton Wheland
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Patent number: 6558743Abstract: The present invention relates to in situ polymerization of fluoropolymer into porous substrates, to improve resistance to degradation by wetting and staining, and wood, to improve resistance to degradation, staining and warping.Type: GrantFiled: September 30, 1999Date of Patent: May 6, 2003Assignee: E. I. du Pont de Nemours and CompanyInventors: John Russell Crompton, Jr., Robert Clayton Wheland
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Publication number: 20020155223Abstract: The disclosed invention relates to polyisocyanate-impregnated lignocellulosic substrates having improved strength, water resistance and appearance, and also to methods and systems for producing such substrates. The polyisocyanate-impregnated lignocellulosic substrate are produced by impregnating a lignocellulosic substrate with an isocyanate resin, followed by polymerization of the isocyanate resin by applying a heated liquid to the impregnated substrate.Type: ApplicationFiled: February 13, 2001Publication date: October 24, 2002Inventors: John Colvin, Charles Vignal, Philippe Edouard Tissot, Larry Raymond Crowe
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Patent number: 6358557Abstract: The invention includes a method of coating a substrate, comprising exposing a substrate to an initiator capable of initiating a graft polymerization reaction on the substrate, to generate reactive radical sites on the surface of the substrate; contacting the substrate with a composition comprising one or more monomers in a medium which has different hydrophilicity compared to the substrate, and grafting monomer molecules onto the substrate by forming covalent bonds between monomer molecules and the substrate at reactive radical sites on the substrate surface. With the invention, novel coated articles can be obtained which are particularly usefull as medical products such as catheters.Type: GrantFiled: September 10, 1999Date of Patent: March 19, 2002Assignee: STS Biopolymers, Inc.Inventors: Guo-Bin Wang, Xianping Zhang
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Patent number: 6177496Abstract: A process involving the application of an aromatic oil-modified polyurethane coating with a softening agent to specifically prepared solid synthetic organic and natural organic formed substrate materials wherein the coating has the capability of receiving subsequently-applied coloring agents and adhesives.Type: GrantFiled: June 23, 1999Date of Patent: January 23, 2001Inventor: Charles F Luzon
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Patent number: 5997952Abstract: A method of preparing a fast-setting coating material on a substrate which comprises contacting a stable aqueous dispersion of a polymer that contains strong cationic groups and weak acid groups onto a substrate that is basic or treated to be basic.Type: GrantFiled: May 23, 1997Date of Patent: December 7, 1999Assignee: The Dow Chemical CompanyInventors: John K. Harris, Donald L. Schmidt, Gene D. Rose
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Patent number: 5780409Abstract: Natural or synthetic wax dissolved in the continuous organic phase of an water-in-oil emulsion retards evaporation of water from a dispersed aqueous phase. An in situ prepared equilibrium mixture of benzyl alcohol, formic acid and benzyl formate emulsified with oleic hydroxyethyl imidazoline or similar oil soluble emulsifying agent is thickened with hydroxypropyl cellulose or hydroxypropyl methylcellulose and contains 0.1 to 1.0% by weight paraffin wax with a melting point of 47.degree. to 65.degree. C. Wax dissolved in the organic phase retards evaporation of water, and formic acid or ammonia which are very volatile in comparison with benzyl alcohol forming the major component of the organic phase. A petroleum distillate is used to pre-wet a hydroxypropyl cellulose thickener and dissolve the wax.Type: GrantFiled: September 3, 1996Date of Patent: July 14, 1998Assignee: Elf Atochem North America, Inc.Inventor: John Distaso
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Patent number: 5741548Abstract: This invention relates to a polymeric composition for application onto Reemay and Satin acetate fabric for laser printability with a high level (90% or greater readability of printed characters, washability and enzyme rejection/retardation. The polymeric composition is applied by chemical grafting that involves the use of monomers/prepolymers, catalyst, graft initiator and other ingredients of the composition. The coating thus developed and subsequently applied to Reemay and Satin acetate fabric allows to undergo graft polymerization thereby forming a polymeric film which is chemically bonded to the fabric substrate with strong adhesion. The chemically grafted fabric is highly durable and permanent in terms of distinct legibility of the printed characters on the substrate after 55 launderings or 25 dry cleanings and has excellent level or enzyme rejection/retardation when the coated fabric with laser printed characters are subjected to an enzyme wash process.Type: GrantFiled: September 24, 1996Date of Patent: April 21, 1998Inventors: Mohan L. Sanduja, Isabella Zilbert, Joel A. Robinson, Paul Thottathil
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Patent number: 5726140Abstract: Natural or synthetic wax dissolved in the continuous organic phase of an water-in-oil emulsion retards evaporation of water from a dispersed aqueous phase. An in situ prepared equilibrium mixture of benzyl alcohol, formic acid and benzyl formate emulsified with oleic hydroxyethyl imidazoline or similar oil soluble emulsifying agent is thickened with hydroxypropyl cellulose or hydroxypropyl methylcellulose and contains 0.1 to 1.0% by weight paraffin wax with a melting point of 47.degree. to 65.degree. C. Wax dissolved in the organic phase retards evaporation of water, and formic acid or ammonia which are very volatile in comparison with benzyl alcohol forming the major component of the organic phase. A petroleum distillate is used to pre-wet a hydroxypropyl cellulose thickener and dissolve the wax.Type: GrantFiled: September 3, 1996Date of Patent: March 10, 1998Assignee: Elf Atochem North America, Inc.Inventor: John Distaso
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Patent number: 5342659Abstract: The invention relates to the chemical bonding of a polymer or polymers onto a non-metallic substrate such as cellophane by contacting the substrate with a grafting solution that contains monomers, prepolymers, catalysts and possibly other ingredients, to obtain graft polymerization onto the substrate with intimate bonding of the polymer onto the substrate surface, and curing the polymer on the substrate by microwave, laser or ultrasonic energy. The invention provides a method where the bonding of the polymer is effected solely by physical rather than chemical means by eliminating the use of silver nitrate in the pretreatment step and using microwave, laser or ultrasonic energy to polymerize the monomers and binding the resulting polymer to the substrate, with the resulting grafted polymer having the same characteristics as if the bonding was effected chemically with silver ions or colloidal silver.Type: GrantFiled: March 12, 1993Date of Patent: August 30, 1994Assignee: Polymer Research Corp. of AmericaInventors: Carl Horowitz, Mohan Sanduja, Paulose Thottathil
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Patent number: 5242490Abstract: Veneer surface reactive polyisocyanates can be used in combination with polyhydroxy functional polymers, preferably nitrocellulose, and isocyanate reaction catalyzing organo tin compounds in low solids film-forming formulations as a substitute for standard wash coat and/or sealer coat compositions in furniture finishing schedules to provide veneer finishes with markedly enhanced resistance to checking.Type: GrantFiled: June 28, 1991Date of Patent: September 7, 1993Assignee: Lilly Industries, Inc.Inventor: James W. Maner
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Patent number: 5232748Abstract: The invention relates to the chemical bonding of a polymer or polymers onto a non-metallic substrate such as cellophane by contacting the substrate with a silver nitrate solution followed by treatment with an alkali hydroxide such as sodium hydroxide or potassium hydroxide, whereby particles of silver or silver oxide are uniformly distributed in situ throughout the surface of the substrate, contacting the thus treated substrate with a grafting solution that contains monomers, prepolymers, catalysts and possibly other ingredients, to obtain graft polymerization onto the substrate with intimate bonding of the polymer onto the substrate surface, and curing the polymer on the substrate by microwave or laser energy.Type: GrantFiled: October 21, 1991Date of Patent: August 3, 1993Assignee: Polymer Research Corp. of AmericaInventors: Carl Horowitz, Paulose Thottathil, Mohan Sanduja
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Patent number: 5001007Abstract: Soft material flat gasket useful as an exhaust flange gasket, a cylinder head gasket or a secondary gasket for internal-combustion engines includes a porous soft material and a crosslinked impregnating agent included in the porous soft material. The crosslinked impregnating agent is comprised of a silicone resin and is the crosslinked product of at least one liquid polysiloxane having reactive hydrogen groups. Crosslinking of the at least one liquid polysiloxane proceeds in the presence of an effective amount of a catalyst, which catalyst is introduced into the porous soft material prior to introduction therein of the at least one liquid polysiloxane according to the inventive method of manufacture.Type: GrantFiled: July 5, 1989Date of Patent: March 19, 1991Assignee: Goetze AGInventors: Hans-Rainer Zerfass, Franz-Josef Giesen
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Patent number: 4937143Abstract: A method for both preserving and coloring wood which comprises in a first step contacting the wood with a liquid composition containing a biocidally effective amount of a copper compound, and in a second step contacting the wood with a liquid composition containing a biocidally effective amount of a dithiocarbamate compound selected from the group consisting of alkyl dithiocarbamates, alkylene dithiocarbamates and soluble salts thereof.Type: GrantFiled: September 16, 1988Date of Patent: June 26, 1990Assignee: Chapman Chemical CompanyInventor: Michael H. West
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Patent number: 4913972Abstract: Disclosed is a method for providing a wood substrate with durability against weathering comprising at least two steps (A) and (B). Step (A) consists of appying to the wood substrate a transparent treatment comprising an organosilicon-containing compound having at least one hydrolyzable silyl group in a carrier for said compound. Step (B) consists of thereafter coating the wood substrate with a transparent, film-forming, coating composition. The coating composition is characterized in that a transparent free film from the coating composition retains an elongation of at least 20 percent after at least 1,000 hours exposure in a Xenon Weatherometer.Type: GrantFiled: February 23, 1989Date of Patent: April 3, 1990Assignee: PPG Industries, Inc.Inventors: John F. Grunewalder, Mark A. Harley, Alan J. Kaylo, Paul J. Prucnal
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Patent number: 4704298Abstract: Method and apparatus for coating ball bearings and like spherically shaped objects with a coating composition entrained in a plasma jet, the ball bearings being held captured in an open-sided cage during the coating operation.Type: GrantFiled: July 31, 1986Date of Patent: November 3, 1987Assignee: The Research Foundation of State University of New YorkInventors: Herbert Herman, Gary S. Fischman, Glenn A. Bancke
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Patent number: 4609571Abstract: The disclosure is of the use of a primer formulation comprising styrene/butadiene rubber, water and alcohol that is employed to promote hot melt adhesion of fluorocarbon treated grease resistant papers, which are used in storage bags and containers for such products as pet foods, for example.Type: GrantFiled: February 7, 1985Date of Patent: September 2, 1986Assignee: Union Camp CorporationInventor: Edward W. Tytke
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Patent number: 4521450Abstract: The electrical conductivity of solid, impregnable materials, such as cellulose-based insulating materials, can be increased by supplying to the solid impregnable material a substance with the ability, during polymerization of a pyrrole compound comprising at least one of the substances pyrrole and N-methylpyrrole, to give a polymer with higher electrical conductivity than the solid impregnable material, as well as a pyrrole compound of the kind stated, whereafter the pyrrole compound is transformed into a polymer in the solid, impregnable material.Type: GrantFiled: June 20, 1983Date of Patent: June 4, 1985Assignee: ASEA AktiebolagInventors: Robert Bjorklund, Hans Gustavsson, Ingemar Lundstrom, Bertil Nygren
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Patent number: 4454178Abstract: Poly(acetylene) films are produced by polymerization of acetylene, if appropriate mixed with a di- and/or poly(alkyne), in the presence of an active transition metal catalyst on filaments, fibers, woven or knitted fabrics, nonwovens, laid webs, interlaced structures or nets composed of metals, glass or natural and/or synthetic fibers.Type: GrantFiled: October 29, 1982Date of Patent: June 12, 1984Assignee: BASF AktiengesellschaftInventors: Herbert Naarmann, Dieter Naegele, Klaus Penzien
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Patent number: 4397756Abstract: The invention is a composition of matter and method for its use in reducing formaldehyde emission from wood composite panels bonded with aminoplast resins. The preferred composition comprises urea, a carbohydrate based material such as cooked or gelatinized starch, and an acidic catalyst for the resin. The ratio of urea to carbohydrate based material is in the range of 10:1 to 40:1 while the urea forms from 20-60% of the composition. In use, the composition is preferably sprayed on the wood particles, flakes or fiber in the blender at the same time resin is added. Typical usage is 0.4-3 parts, on a urea basis, added to each 100 parts of dry wood substance. Depending on several factors, the reduction in formaldehyde emission ranges from 60-90% without serious deterioration occurring in any other product physical properties.Type: GrantFiled: August 10, 1981Date of Patent: August 9, 1983Assignee: Weyerhaeuser CompanyInventor: William F. Lehmann
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Patent number: 4329383Abstract: Non-thrombogenic material comprising a base polymer treated with heparin, the improvement in which the heparin is covalently bonded with the base polymer through only one acetal bond or hemiacetal bond at each bonding site between the heparin and the base polymer.Type: GrantFiled: July 21, 1980Date of Patent: May 11, 1982Assignee: Nippon Zeon Co., Ltd.Inventor: Yasushi Joh
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Patent number: 4304564Abstract: Cotton, or other fabric containing cellulose, is treated with acrylamide and a chemical initiator that promotes reaction of acrylamide with cellulose. The fabric, with bound acrylamide, is then treated with glyoxal and an acidic, metal salt catalyst to produce a fabric containing crosslinked cellulose. Thus, the fabric is given wrinkle resistance and durable-press properties by the treatment without using formaldehyde, free or combined, that could be released during treatment or from the treated fabric.Type: GrantFiled: May 5, 1980Date of Patent: December 8, 1981Assignee: The United States of America as represented by the Secretary of AgricultureInventors: John G. Frick, Jr., Robert J. Harper, Jr.
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Patent number: 4295910Abstract: A lamination process is provided for the lamination of a vinyl film to a cellulosic substrate, such as a wood product, e.g., particleboard, wherein grain swelling of the substrate is avoided. The process involves coating the wood product substrate with an organic polyisocyanate having at least two active isocyanate groups per molecule as a primer coat, and thereafter applying a vinyl acetate-ethylene copolymer emulsion adhesive to the primed substrate to form an interlaminate adhesive layer. A vinyl polymeric film is then applied to the adhesive-coated substrate to form a permanently bonded laminate of the substrate and the film. The lamination process of the present invention is particularly suitable for use in a continuous hot-line heat reactivated laminating procedure.Type: GrantFiled: April 25, 1980Date of Patent: October 20, 1981Assignee: Champion International CorporationInventors: James Cooley, Ozzie Fogle
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Patent number: 4190685Abstract: An article of clothing, particularly a glove, which is highly resistant to chemical warfare agents, comprising a fabric substrate, normally pre-shaped to form the article, which is coated with an inner layer of a resilient elastomer, such as natural rubber, deposited from a latex, which adheres to but does not penetrate the substrate, and then coated with an outer layer of a butyl rubber which may contain an inorganic filler. The fabric substrate provides wearer comfort while the combination of an inner layer having a high vapor retention capacity and an outer layer which is resistant to toxic chemicals in liquid form and has a low vapor permeability, provides a high resistance to toxic chemicals for periods of time not heretofore possible.Type: GrantFiled: February 27, 1978Date of Patent: February 26, 1980Assignee: Her Majesty the Queen in right of Canada, as represented by the Minister of National DefenceInventors: John A. Hart, John C. Collyer
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Patent number: 4186242Abstract: A process for the preparation of lignocellulosic composite using urea-formaldehyde adhesive is described characterized by treating the lignocellulosic constituents with ammonium-base lignosulfonate prior to pressing to decrease the emission of formaldehyde.Type: GrantFiled: March 8, 1976Date of Patent: January 29, 1980Assignee: Georgia-Pacific CorporationInventor: Howard W. Holmquist
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Patent number: 4123573Abstract: A method of imparting flame retardant character to cellulosic containing material by applying an effective fire retarding imparting amount of a phosphorous composition to the material and curing the phosphorous composition, the improvement comprising pretreating the material with an aqueous caustic solution prior to applying the phosphorous composition, wherein the material contains at least 20% polyester.Type: GrantFiled: June 20, 1977Date of Patent: October 31, 1978Assignee: Hooker Chemicals & Plastics Corp.Inventor: George M. Wagner
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Patent number: 4042728Abstract: Vinyl modified lignocellulosic particles are made by polymerization of vinyl monomer on substrate lignocellulosic particles. An improved initiator for the in situ polymerization such as sulfoxy compounds is provided. Over a wide range of add-on ratio of vinyl polymer to lignocellulosic particles, coatings for panels can be produced which have neither the solvent sensitivity of the polymer nor the water sensitivity of the cellulose.Type: GrantFiled: December 10, 1975Date of Patent: August 16, 1977Assignee: Borden, Inc.Inventors: Shui Tung Chiu, Tatsuhei Kaneko
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Patent number: 4029831Abstract: A decorative panel having areas of different light reflecting characteristics is manufactured by inhibiting the curing of selected areas of a resinous top coat material which is applied to a panel substrate. In one technique a curing inhibitor is applied to selected areas of the substrate surface prior to application, over the entire surface, of a top coat material containing a mixture of an alkyd resin with melamine-formaldehyde, urea-formaldehyde or a mixture thereof. Upon curing, the inhibitor treated areas cure more slowly than the untreated areas and are characterized by a roughened, diffusely reflecting surface contrasting with the untreated areas having a smooth reflecting surface.Type: GrantFiled: June 1, 1976Date of Patent: June 14, 1977Assignee: Masonite CorporationInventor: Lyn A. Daunheimer
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Patent number: 4016312Abstract: A cellulosic substrate is provided with an adherent polymeric coating by wetting the substrate first with a coagulant for the polymer to be used, contacting the resulting coating with an aqueous dispersion of an oxidatively drying binder and a polymer of an ethylenically unsaturated ester.Type: GrantFiled: May 28, 1975Date of Patent: April 5, 1977Assignee: Akzo N.V.Inventor: Hans J. Luthardt
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Patent number: 3936542Abstract: A method of applying a stable, aqueous, low viscosity resin composition to porous or absorbent materials and controlling the migration thereon which comprises: treating the porous or absorbent materials with an alkaline material to raise its pH above about 7 and give it an alkaline reserve potential; and applying to the porous or absorbent materials a stable, aqueous, acidic low viscosity resin composition having a viscosity of less than about 1,000 centipoises and an acidic pH less than about 7 and comprising from about 10% to about 60% by weight on a solids basis of a synthetic resin and from about 0.Type: GrantFiled: November 15, 1973Date of Patent: February 3, 1976Assignee: Johnson & JohnsonInventor: Andrew John Cox