Ingredient Is A Nitrogen Containing Compound Patents (Class 521/94)
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Patent number: 6444718Abstract: Aqueous urea and/or aqueous urea condensate and/or aqueous urea composition may be utilized to fight grass, forest, building, and other flammable organic material by applying it to these flammable organic materials. The aqueous urea and/or aqueous urea condensate and/or aqueous composition may also be incorporated into flammable materials such as solid and foam plastic and natural materials. Aqueous urea composition are produced by adding and mixing carbon auxiliaries, such as phosphorus containing compounds, metal containing compounds that will accelerate carbonization, heat reflector, surfactant and fillers to the aqueous urea.Type: GrantFiled: September 1, 2000Date of Patent: September 3, 2002Inventor: David H. Blount
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Patent number: 6423251Abstract: Aqueous urea condensate-boron oxyacid salts composition may be utilized to fight grass, forest, building, and other flammable organic material by applying it to these flammable organic materials. The solid or aqueous urea condensate-boron oxyacid salts composition may also be incorporated into flammable materials such as solid and foam plastic and natural materials. Urea condensate-boron oxyacid salts composition may also contain carbonization auxiliaries, such as phosphorus containing compounds, metal containing compounds that will accelerate carbonization, heat reflector, surfactant and fillers. The urea condensate-boron oxyacid salts composition is produced by mixing, heating and/or reacting urea, boron oxyacids and alkali metal hydroxide or alkaline earth metal hydroxide or oxide or the boron oxyacids maybe first reacted with the alkali metal hydroxide or the alkaline earth metal oxide or hydroxide.Type: GrantFiled: January 5, 2001Date of Patent: July 23, 2002Inventor: David H. Blount
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Patent number: 6420442Abstract: Flame-retardant foam slabs are based on styrene polymers wherein from 1 to 12% by weight of expanded graphite and also, if desired, from 1 to 12% by weight of a phosphorus compound are present as flame retardants.Type: GrantFiled: June 11, 2001Date of Patent: July 16, 2002Assignee: BASF AktiengesellschaftInventors: Franz-Josef Dietzen, Guiscard Glück, Gerd Ehrmann, Gerhard Turznik, Gerhard Alicke, Klaus Hahn, Martin Klatt, Karlheinz Braun
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Patent number: 6406645Abstract: A process additive for polyolefin films and foams produces products having reduced aging time and reduced greasiness and reduced grease-like transfer as compared to glycerol monostearate (GMS). Carbon dioxide based blowing agents are suitable. The process additive comprises a fatty acid N-aliphatic alcohol amide of the general formula R—CON(R′)R″. R is a fatty hydrocarbon radical having from about 8 to 30 carbons. R′ typically is hydrogen. R′ can also be an alkyl radical of from about 1 to 6 carbons or an alkyl alcohol radical of from about 1 to 6 carbons. R″ is an alkyl alcohol fragment of from about 1 to 6 carbons. The alkyl alcohol fragments can be monohydric or polyhydric. Secondary fatty monoalkanolamides in which R′ is hydrogen are particularly useful, especially stearamide monoethanolamine (MEA).Type: GrantFiled: April 24, 2001Date of Patent: June 18, 2002Assignee: Sealed Air CorporationInventors: Nelson E. Malwitz, Natarajan S. Ramesh
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Patent number: 6403663Abstract: A method of producing a foamed material comprises contacting a material with a fluid mixture comprising carbon dioxide and a surfactant, wherein the surfactant facilitates the dissolution of the carbon dioxide into the material and then foam the material in the fluid mixture.Type: GrantFiled: September 20, 1999Date of Patent: June 11, 2002Assignees: North Carolina State University, The University of North Carolina at Chapel HillInventors: Joseph M. DeSimone, Saad A. Khan, Joseph R. Royer, Richard J. Spontak, Teri Anne Walker
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Patent number: 6350511Abstract: The invention relates to open-celled melamine foams which have improved fire performance and whose cell-structure surface has been to some extent or entirely coated with an ammonium salt.Type: GrantFiled: April 5, 2001Date of Patent: February 26, 2002Assignee: BASF AktiengesellschaftInventor: Arnd Thom
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Patent number: 6348513Abstract: Foamable compositions which exhibit reduced surface tack and better handling characteristics are obtained through the use of specific combinations of epoxy resins. One or more solid epoxy resins are utilized together with liquid and/or semi-solid epoxy resins. The compositions, which preferably contain hollow glass microspheres, are capable of providing foams which are useful in the manufacture of reinforced structural members.Type: GrantFiled: May 4, 1999Date of Patent: February 19, 2002Assignee: Henkel CorporationInventors: Bradley L. Hilborn, Bruce Lee Harrison
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Patent number: 6340717Abstract: The invention relates to a process for producing foamed polyolefin-based plastics blocks by first crosslinking a matrix comprising a) from 51 to 97% by weight of one or more polyolefins, selected from the group consisting of polyethylene and ethylene copolymer, b) from 3 to 20% by weight of a foaming agent, using &bgr;-radiation of energy >6 MeV. The thickness of the matrix is from 25 to 45 mm. The radiation dose is from 20 to 150 kJ/kg. During the irradiation, atmospheric oxygen is at least substantially prevented from reaching the surface of the matrix. After crosslinking, the crosslinked matrix is foamed by heating to a temperature >160° C. and decomposing the blowing agent.Type: GrantFiled: February 26, 2001Date of Patent: January 22, 2002Assignees: HT Troplast AG, Studer Draht-und KabelwerkInventors: Werner Hargarten, Hans Jörg Hartmann, Burkhard Voss
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Publication number: 20010056131Abstract: A foam composition and method of making the same. The foam of the present invention comprises a mixture of glutarate ester plasticizer, adipate ester plasticizer, alcohol carboxylic acid ester, cell stabilizer, barium/zinc activator stabilizer, potassium/zinc activator stabilizer or zinc stabilizer, azodicarbonamide blowing agent, low-fogging vinyl dispersion resin, vinyl blending resin, and black acrylic pigment dispersion. The foam is made by the process of mixing the ingredients until a homogenous liquid mixture is present, de-airing the homogeneous liquid mixture, casting the liquid mixture on a non-fogging release-coated surface, expanding the cast liquid mixture by exposing it to an elevated temperature for a prescribed duration of time, and then either cooling the expanded mixture and winding it into rolls, or coating the stabilized composition with pressure sensitive adhesive, cooling it, and then winding it into rolls.Type: ApplicationFiled: June 25, 2001Publication date: December 27, 2001Applicant: Gaska Tape, Inc.Inventor: Lawrence A. Cascino
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Publication number: 20010054776Abstract: The present invention provides a process for manufacturing a cross-linked expanded safety support having a cellular structure comprising closed cells. The process involves kneading by thermomechanical working a rubber composition comprising a diene elastomer having a molar ratio of diene units (defined as units resulting from dienes) of less than 15%, water in an amount of from 3 to 6 phr (phr=parts by weight per 100 parts elastomer), a blowing agent, such as azobisformamide, that provides for formation of the cellular structure and a vulcanization system. The rubber composition so prepared is then formed, e.g. by injection or extrusion, into cross-linkable blank, which is then cured in a mold and then demolded. The demolded blank is then expanded by decomposition of the blowing agent and vulcanized to produce the cross-linked expanded elastomeric support.Type: ApplicationFiled: April 25, 2001Publication date: December 27, 2001Inventor: Bernard Bon
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Patent number: 6316510Abstract: A foamable binder composition and methods for producing the same are provided. The foamable binder composition of the present invention comprises a corrosion preventing agent, a main adhesion material, a surfactant capable of inducing formation of foams, and water. In addition, a fast wet tack material may also be present. In one application, the foamable binder composition is used with insulating materials in thermally insulating a building.Type: GrantFiled: April 5, 2000Date of Patent: November 13, 2001Inventor: Henry Sperber
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Patent number: 6300385Abstract: The present invention provides an organic porous material having equivalent thermal insulating properties to those of a porous material of a silica material and improved brittleness. The organic porous material of the present invention is an aggregate of organogel fine particles having a particle diameter of 10 to 300 nm, wherein inter-particle crosslinking is formed between adjoining organogel fine particles.Type: GrantFiled: October 20, 1999Date of Patent: October 9, 2001Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takashi Hashida, Masaaki Suzuki, Yukiyoshi Ono
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Patent number: 6278021Abstract: A process for producing an urea preparation of reduced particle-size and narrow particle-size distribution by using an air milling process is provided. Also provided is an urea preparation of reduced particle-size, narrow particle-size distribution, and high purity.Type: GrantFiled: June 9, 2000Date of Patent: August 21, 2001Inventor: Sean Edward Paul Condren
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Patent number: 6262137Abstract: Polymer articles including ethylene-vinyl acetate and maleic anhydride are described. The ethylene-vinyl acetate can be a high vinyl acetate content ethylene-vinyl acetate. The articles include foamed articles and non-foamed articles. The foamed articles have improved characteristics and properties, such as surface bonding properties.Type: GrantFiled: January 6, 1998Date of Patent: July 17, 2001Assignee: Sentinel Products Corp.Inventors: Matthew L. Kozma, John D. Bambara, Robert F. Hurley, Scott C. Smith
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Publication number: 20010003756Abstract: A flexible, low density thermoplastic foam and a method for lowering the density and increasing the flexibility of a thermoplastic foam having a melting temperature and being either amorphous with a softening temperature or semicrystalline with a glass transition temperature.Type: ApplicationFiled: January 12, 2001Publication date: June 14, 2001Applicant: Armacell Enterprice GMBHInventors: David W. Kreiser, Allan L. Dinkel, Juerg Patrik Weibel
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Patent number: 6232357Abstract: The present invention relates to compositions based on elastomeric polymers of vinylidene fluoride, hexafluoropropene and optionally tetrafluoroethylene suitable for providing microcellular foamed vulcanized articles by extrusion or compression molding. In the case of the production of extruded articles based on vinylidene fluoride and hexafluoropropene copolymers, the compositions comprise: the copolymer, bisphenol AF, a quaternary phosphonium or aminophosphonium salt, azodicarbonamide, MgO, Ca(OH)2, zinc stearate and a plasticizer, each of the components being contained in an exactly defined proportion.Type: GrantFiled: December 11, 1998Date of Patent: May 15, 2001Assignee: Ausimont S.p.A.Inventors: Franco Barbieri, Raffaele Ferro, Giuseppe Fiorillo
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Patent number: 6231926Abstract: A process for producing poromeric synthetic leather comprises I. producing an essentially nonporous impregnate by impregnating a textile sheet material with an aqueous polyurethane dispersion and drying, and II. producing a poromeric synthetic leather from the impregnate by subjecting the impregnate to the action of an aqueous solution of a Brønsted base.Type: GrantFiled: June 4, 1999Date of Patent: May 15, 2001Assignee: BASF AktiengesellschaftInventors: Cesare Ronzani, Ralf Mossbach, Karl Häberle
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Patent number: 6228897Abstract: Systems, apparatus combinations and methods for producing a powder coating are provided wherein a stream of a powder coating precursor including at least one resin and at least one additional powder coating ingredient is contacted with a process fluid effective to reduce the viscosity of the powder coating precursor to allow processing of the powder coating precursor at a lower temperature.Type: GrantFiled: April 26, 1999Date of Patent: May 8, 2001Assignee: Rohm and Haas CompanyInventors: Andrew T. Daly, Owen H. Decker, Karl R. Wursthorn, Frank R. Houda, Leo T. Grundowski, Carl W. Ernst
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Patent number: 6225364Abstract: Disclosed is an extruded, dimensionally stable, closed cell alkenyl aromatic polymer foam. The foam comprises an alkenyl aromatic polymer material greater than 50 percent by weight of alkenyl aromatic monomeric units. The foam has a density of about 16 to about 64 kilograms per cubic meter. The foam has a thickness in cross section of 15 millimeters or more. The foam has a blowing agent composition comprising a primary blowing agent of about 70 to about 95 weight percent 1,1,2,2-tetrafluoroethane and a secondary blowing agent comprising about 30 to about 5 weight percent based upon the total moles of the blowing agent composition. The secondary blowing agent being selected from the group consisting essentially of 1,1,1,2-tetrafluoroethane, carbon dioxide, nitrogen, argon, and water. Further disclosed is a process for making the foam.Type: GrantFiled: August 1, 2000Date of Patent: May 1, 2001Assignee: The Dow Chemical CompanyInventors: Bharat I. Chaudhary, Kyung W. Suh, Andrew N. Paquet
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Patent number: 6183764Abstract: A microbicidal organic polymer material for use in manufacturing of contact lenses, condoms, surgical sutures and gloves, medical examination devices and similar uses is provided by polymers to which is tightly adsorbed a disinfectant organic dye. Many polymers such as polyvinyl chloride and acrylic polymers show exceptional avidity for a number of microbicides, of acidic, basic, aromatic and/or hydrophobic character such as methylene blue and gentian violet. Consequently, devices constructed of these polymeric materials release no free dye to an aqueous solution. The material is generally a natural or synthetic polymer that releases no particles or fines into wounds or body orifices. Presence of adsorbed disinfectant organic dye allows the polymer to inhibit microbial growth in a number of different situations. Several common microbes are killed by being incubated in the present of an embodiment of the invention which contains a combination of methylene blue and gentian violet.Type: GrantFiled: September 22, 1998Date of Patent: February 6, 2001Assignee: Shanbrom TechnologiesInventor: Edward Shanbrom
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Patent number: 6171532Abstract: In a process for stabilizing a foamed starting slip material, the starting slip material which is foamed comprises the following constituents: a. inorganic sinterable material, b. a source of blowing gas, c. a framework former which forms a framework when the pH of the starting slip material is changed, d. pH control material, e. liquid, f. if desired, one or more of the following materials: dispersant binder viscosity modifier, and the pH of the starting slip material is changed to initiate or accelerate the formation of the framework from the framework former.Type: GrantFiled: November 17, 1998Date of Patent: January 9, 2001Assignee: BASF AktiengesellschaftInventor: Hans-Josef Sterzel
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Patent number: 6156328Abstract: A polymer foam sheet having a thickness of at least 0.3 cm, an average cell size of at least 0.1 mm, and at least one pyrethrum compound dispersed in the polymer matrix, wherein the total amount of pyrethrum compounds in the sheet, based on the weight of the foam solids therein, is from 1 part per million (ppm) to 20,000 ppm.Type: GrantFiled: February 1, 1999Date of Patent: December 5, 2000Assignee: The Dow Chemical CompanyInventors: Jeff M. Alcott, Brad Gougeon, James J. Kubiak
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Patent number: 6156813Abstract: A process additive for polyolefin films and foams produces products having reduced aging time and reduced greasiness and reduced grease-like transfer as compared to glycerol monostearate (GMS). Carbon dioxide based blowing agents are suitable. The process additive comprises a fatty acid N-aliphatic alcohol amide of the general formula R-CON(R')R". R is a fatty hydrocarbon radical having from about 8 to 30 carbons. R' typically is hydrogen. R' can also be an alkyl radical of from about 1 to 6 carbons or an alkyl alcohol radical of from about 1 to 6 carbons. R" is an alkyl alcohol fragment of from about 1 to 6 carbons. The alkyl alcohol fragments can be monohydric or polyhydric. Secondary fatty monoalkanolamides in which R' is hydrogen are particularly useful, especially stearamide monoethanolamine (MEA). The benefits of the invention can be achieved and enhanced in some examples by mixing the fatty acid N-aliphatic alcohol amide with an ester of a long chain fatty acid with a polyhydric alcohol, including GMS.Type: GrantFiled: October 7, 1999Date of Patent: December 5, 2000Assignee: Sealed Air CorporationInventors: Nelson E. Malwitz, Natarajan S. Ramesh, Shau-Tarng Lee
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Patent number: 6146892Abstract: Methods and compositions are described that provide three-dimensional fibrillar matrices useful as, among other things, structural prosthetics and scaffolds for cells. The porous fibrillar matrices of the present invention have desirable mechanical properties suitable to a variety of applications, including platforms for in vitro cell cultivation, implants for tissue and organ engineering, implants as tendon and facia prosthetics, and product packaging.Type: GrantFiled: September 28, 1998Date of Patent: November 14, 2000Assignee: The Regents of the University of MichiganInventors: Peter X. Ma, Ruiyun Zhang
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Patent number: 6140379Abstract: A textured metallocene polyethylene foam sheet suitable for use in a floor covering is made using a highly co-activated azodicarbonamide package which blows the metallocene polyethylene effectively. The preferred co-activators are zinc oxide and urea. The textured surface of metallocene polyethylene foam is formed by a chemical embossing process which utilizes a liquid triazole having an alkyl moiety as a foam-expansion inhibitor. The triazole is dissolved in a non-polar solvent to form the foam inhibitor. The preferred inhibitor is a hydrocarbon which may be halogenated.Type: GrantFiled: December 7, 1998Date of Patent: October 31, 2000Assignee: Armstrong World Industries, Inc.Inventors: Li-Ying T. Yang, Martin Dees
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Patent number: 6127441Abstract: An expandable resin composition comprising:(A) 100 parts by weight of HDPE (high density polyethylene) having a DSC melting point of about 127 to about 136 degrees C.; a density of 0.945 to 0.967 gram per cubic centimeter; and a melt flow rate of about 0.1 to about 10 grams per 10 minutes, and for each 100 parts by weight of component (A),(B) about 2 to about 50 parts by weight of polypropylene having a DSC melting point of at least about 130 degrees C.;(C) about 50 to about 200 parts by weight of an ethylene/alpha-olefin copolymer, prepared with a metallocene catalyst, having a DSC melting point of about 98 to about 121 degrees C.; a density of 0.900 to 0.935 gram per cubic centimeter; and a melt flow rate of about 0.5 to about 3 grams per 10 minutes;(D) about 0.1 to about 5 parts by weight of a polysiloxane-polyether block copolymer having the following formula:R.sub.3 --Si--O--R.sub.2 (SiO).sub.m --RX(SiO).sub.n --SiR.sub.Type: GrantFiled: October 22, 1999Date of Patent: October 3, 2000Assignee: Nippon Unicar Company LimitedInventors: Toshio Sakamoto, Koji Ishihara, Takashi Furukawa
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Patent number: 6124770Abstract: An expandable resin composition comprising(A) HDPE (high density polyethylene);(B) a high pressure, low density homopolymer of ethylene (HP-LDPE);(C) polypropylene;(D) a polysiloxane-polyether block copolymer; and(E) a nucleating agent of azodicarbonamide and/or talc.Type: GrantFiled: October 22, 1999Date of Patent: September 26, 2000Assignee: Nippon Unicar Company LimitedInventors: Toshio Sakamoto, Koji Ishihara, Takashi Furukawa
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Patent number: 6110982Abstract: An epoxy foam comprising a plurality of resins, a plurality of curing agents, at least one blowing agent, at least one surfactant and optionally at least one filler and the process for making. Preferred is an epoxy foam comprising two resins of different reactivities, two curing agents, a blowing agent, a surfactant, and a filler. According to the present invention, an epoxy foam is prepared with tailorable reactivity, exotherm, and pore size by a process of admixing a plurality of resins with a plurality of curing agents, a surfactant and blowing agent, whereby a foamable mixture is formed and heating said foamable mixture at a temperature greater than the boiling temperature of the blowing agent whereby said mixture is foamed and cured.Type: GrantFiled: January 13, 1999Date of Patent: August 29, 2000Assignee: Sandia CorporationInventors: Edward M. Russick, Peter B. Rand
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Patent number: 6111020Abstract: Ethylene vinyl acetate (EVA)/ethylene-styrene interpolymer (ESI) blends are described that are useful in preparing foams which exhibit improved compression set resistance, dimensional stability and rebound resilience at similar foam densities than known foam systems, e.g. EVA. The cross-linked foams of this invention are particularly useful in fabricating footwear and gasket products.Type: GrantFiled: July 15, 1998Date of Patent: August 29, 2000Assignee: The Dow Chemical CompanyInventors: Steven R. Oriani, Seema V. Karande
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Patent number: 6107358Abstract: A method for the production of a water-absorbent resin capable of fast water absorption is disclosed which comprises the steps of dispersing bubbles of an inert gas in an aqueous monomer solution of a mixture of a water-soluble unsaturated monomer and a water-soluble cross-linking monomer and subjecting the mixture to copolymerization under the condition that a volume of the monomer solution wherein the inert gas is dispersed is in the range of 1.02 to 5 times of a volume of non-dispersant state.Type: GrantFiled: August 21, 1997Date of Patent: August 22, 2000Assignee: Nippon Shokubai Co., Ltd.Inventors: Nobuyuki Harada, Koji Miyake, Yoshihiro Motono, Hideyuki Tahara, Takumi Hatsuda, Teruyuki Kanto, Akito Yano, Yorimichi Dairoku, Kazuki Kimura, Yasuhiro Fujita
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Patent number: 6096792Abstract: A silicone rubber sponge composition obtained by compounding a polyorganosiloxane having an average degree of polymerization of 3,000 to 300,000, a reinforcing silica filler, 1,1'-azo-bis(1-acetoxy-1-phenylethane) as a foaming agent, and organic peroxides and/or addition reaction curing agents. The silicone rubber sponge composition can provide a silicone rubber sponge which has a high foaming ratio, has a fine and uniform cell structure, has excellent surface smoothness of the skin layer, does not show a surface tackiness, has a good compression set, and does not require a post cure of a long time.Type: GrantFiled: April 28, 1997Date of Patent: August 1, 2000Assignee: Toshiba Silicone Co., Ltd.Inventors: Hiroyoshi Iijima, Makoto Sawada, Isao Iida
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Patent number: 6096791Abstract: Heat-curing, expanding mouldings based on solid polybutadiene rubber and vulcanization systems free from elemental sulfur are distinguished by the following advantageous properties: in the uncured state in which they are supplied, they have minimal rubber-elastic resilience and are readily formable. During the curing process, no unpleasant odors are given off and, after curing, a soft and elastic foam with a continuous outer skin is formed.Type: GrantFiled: April 29, 1999Date of Patent: August 1, 2000Assignee: Henkel-Teroson GmbHInventors: Peter Born, Klaus Hoellriegel, Rudolf Neubauer
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Patent number: 6080796Abstract: Insecticides, and particularly termiticides, may be dissolved in monomers polymerized to form foamable polymers, such as polystyrene. The resulting monomer and insecticide may then be polymerized in a conventional manner and either impregnated with a blowing agent or expanded using an extrusion process to produce polymeric foam having insecticidal properties. The polymer may also contain a flame retardant. Such polymers and the foam made therefrom may be used in the construction industry, particularly where insect infestation is a concern.Type: GrantFiled: August 19, 1998Date of Patent: June 27, 2000Assignee: Nova Chemicals Inc.Inventors: Rebecca B. Liebert, Christine B. Hetzer
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Patent number: 6075063Abstract: A method for foaming or foam-coating components is used for foaming hollow cavities of double-walled or multiple-walled components or foam-coating component parts with decorative surfaces so as to improve haptic properties of component parts. A material is introduced or applied in an unfoamed state to be foamed through the use of microwave energy. In order to achieve high dielectric losses and to ensure that the heat effect is evently distributed and essentially restricted to the material to be foamed, the material is adjusted in a polar manner by addition of certain substances such as conductive soot. Reflecting agents are used to improve the distribution and effect of the microwaves. The method ensures fully foamed hollow cavities and foam layers of uniform thickness. A foamable material for foaming or foam-coating components is also provided.Type: GrantFiled: August 23, 1999Date of Patent: June 13, 2000Assignee: Moeller Plast GmbHInventor: M. Zouheir Jandali
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Patent number: 6040351Abstract: A foam rubber composition and a method for making same which is foamable to a high degree and a molded product made from the foam rubber composition wherein the compositions has: (A) a low-molecular Ethylene-propylene-5-ethylidene-2-norbornene terpolymer having a Mooney viscosity (ML.sub.1+4 at 100.degree. C.) of 20 to 40, an ethylene/propylene ratio by weight of 65/35 to 50/50, an iodine value of 20 to 30, and a Q value (Mw/Mn) not exceeding 3 as determined by gel permeation chromatography; (B) a high-molecular ethylene-propylene-5-ethylidene-2-norbornene terpolymer having a Mooney viscosity (ML.sub.1+4 at 100.degree. C.) of 100 to 300, an ethylene/propylene ratio by weight of 65/35 to 50/50, an iodine value of 20 to 30 and a Q value (Mw/Mn) of 6 to 10; (C) a vulcanizing system agent containing sulfur as a vulcanizer, and zinc carbamate and sulfenamide as accelerators; and (D) a foaming agent containing N, N'-dinitrosopentamethylenetetramine and urea.Type: GrantFiled: June 5, 1998Date of Patent: March 21, 2000Assignee: Toyoda Gosei Co. Ltd.Inventors: Tomoaki Okita, Katsumi Nakashima, Takashi Mizushima, Takeru Wadaki
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Patent number: 6006818Abstract: The models comprise an expanded or expansible polymer or copolymer generally used for the fabrication of such models. The polymer or copolymer contains an oxidizing agent comprising a nitroaliphatic compound that accepts expansion without substantial alteration of its oxidizing properties, that does not substantially modify the characteristics of the polymer or copolymer before, during and after expansion, that does not harm the quality of the metal that is cast, and that has a decomposition temperature essentially identical to that of the polymer or copolymer.Type: GrantFiled: December 5, 1997Date of Patent: December 28, 1999Assignee: Huttenes-Albertus France (S.A.R.L.)Inventors: Emmanuel Berthelet, Michael Berthelet, Asita Bhattacharya
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Patent number: 6005015Abstract: A process additive for polyolefin films and foams produces products having reduced greasiness and reduced grease-like transfer as compared to glycerol monostearate (GMS). The process additive comprises a fatty acid N-aliphatic alcohol amide of the general formula R--CON(R')R". R is a fatty hydrocarbon radical having from about 8 to 30 carbons. R' typically is hydrogen. R' can also be an alkyl radical of from about 1 to 6 carbons or an alkyl alcohol radical of from about 1 to 6 carbons. R" is an alkyl alcohol fragment of from about 1 to 6 carbons. The alkyl alcohol fragments can be monohydric or polyhydric. Secondary fatty monoalkanolamides in which R' is hydrogen are particularly useful, especially stearamide monoethanolamine (MEA). The benefits of the invention can be achieved and enhanced in some examples by mixing the fatty acid N-aliphatic alcohol amide with an ester of a long chain fatty acid with a polyhydric alcohol, including GMS.Type: GrantFiled: October 6, 1997Date of Patent: December 21, 1999Assignee: Sealed Air CoporationInventors: Nelson E. Malwitz, Natarajan S. Ramesh
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Patent number: 5990184Abstract: Process for making polyisocyanate based aerogels by trimerisation of an organic polyisocyanate in an organic solvent in the presence of a (co)polymer containing an isocyanate-reactive group, gellation and supercritically drying of the obtained sol-gel.Type: GrantFiled: March 31, 1998Date of Patent: November 23, 1999Assignee: Imperial Chemical Industries PLCInventor: Guy Leon Jean Ghislain Biesmans
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Patent number: 5925686Abstract: Expanded polyolefin particles are produced by impregnation of polyolefin granules with a volatile blowing agent in suspension under pressure and subsequent decompression. The blowing agent used is ammonia.Type: GrantFiled: November 24, 1997Date of Patent: July 20, 1999Assignee: BASF AktiengesellschaftInventors: Wolfram Kogel, Isidoor De Grave, Klaus Hahn, Joachim Fischer
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Patent number: 5911904Abstract: A foamable thermal insulating barrier coating produced from an aqueous acrylic based latex emulsion and an unencapsulated chemical blowing agent for coating paper and paperboard and especially suitable for coating one or both sides of cupstock to retain heat and to provide moisture and grease resistance.Type: GrantFiled: December 16, 1997Date of Patent: June 15, 1999Assignee: International Paper CompanyInventors: Keith S. Shih, Ashok M. Adur, Charles J. Davis
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Patent number: 5912277Abstract: The present invention relates to a medium density chlorinated polyvinyl chloride foam and the method of preparing such a foam using a blend of chemical blowing agents. The foam having a specific gravity in the range of about 0.3 to about 1.5 comprises chlorinated polyvinyl chloride, a blend of decomposition type blowing agents, a tin stabilizer, an optional impact modifier and an optional high molecular weight process aid.Type: GrantFiled: February 3, 1998Date of Patent: June 15, 1999Inventor: Robert Edwin Detterman
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Patent number: 5856002Abstract: A polymeric foam which comprises a polymer and a small amount of organic composite having a bactericidal action contained therein, said organic composite being composed mainly of N,N-dimethyl-N'-phenyl-N'-(fluorodichloromethylthio)sulfamide, 1,2-benzisothiazoline-3-on, diiodomethyl-p-tolylsulfone, and methyl(benzimidazol-2-yl)carbamate, said polymer being a polyethylene copolymer resin which contains 72-95 wt % ethylene and 28-5 wt % vinyl acetate.The polymeric foam safely exhibits its antibacterial and mildewproofing functions and hence is suitable for use as a cushioning material on the floor and wall and also as a material for building blocks and babies' toys.Type: GrantFiled: October 31, 1997Date of Patent: January 5, 1999Inventor: Shoji Mori
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Patent number: 5854309Abstract: Flame retardant compositions such as polyurethane foams are produced by incorporating an amino condensation composition. The amino condensation compositions are produced by heating urea or heating urea with other nitrogen containing compounds that will condensate with or react with isocyanic acid and/or cyanic acid or heating urea first then reacting the condensation compounds with other nitrogen containing compounds. The amino condensation compounds may be mixed with or reacted with carbonization auxiliaries, aldehydes and fillers to produce an amino condensation composition which is incorporated in more flammable organic compositions such as polyurethanes, polyester resins, epoxy resins, vinyl resins and other resins. The amino condensation salts of phosphorus, boron or sulfur containing compounds and the amino condensation-aldehyde resins may also be used as the flame retardant compound in this invention.Type: GrantFiled: September 30, 1996Date of Patent: December 29, 1998Inventor: David H. Blount
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Patent number: 5789453Abstract: The present invention relates to a medium density chlorinated polyvinyl chloride foam and the method of preparing such a foam using a blend of chemical blowing agents. The foam having a specific gravity in the range of about 0.3 to about 1.5 comprises chlorinated polyvinyl chloride, a blend of decomposition type blowing agents, a tin stabilizer, a optional impact modifier and a optional high molecular weight process aid.Type: GrantFiled: April 10, 1997Date of Patent: August 4, 1998Assignee: The B. F. Goodrich CompanyInventor: Robert Edwin Detterman
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Patent number: 5741825Abstract: A polyurethane foam is constituted by using a blowing agent selected from the group consisting of iodofluorohydrocarbons, perfluoroalkenes and hydrogen-containing fluoromorpholine derivatives. These blowing agents have a low thermal conductivity and a short life in the air, and thus impose no or very small load such as ozone layer depletion potential (ODP) and global warming potential (GWP) on the environment. The iodofluorohydrocarbon, in particular, can give an incombustibility and self-extinguishing property to the conventionally used inflammable substance such as cyclopentane or the like, and thus is also advantageous from the viewpoint of safety of the thermal insulating material.Type: GrantFiled: September 6, 1995Date of Patent: April 21, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Fumihiro Inagaki, Takashi Hashida, Masa-aki Suzuki, Yoshio Kishimoto, Takayoshi Ueno
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Patent number: 5739221Abstract: Expandable styrene resin beads are described, which, when expanded to a bulk density of 20 g/l, give pre-expanded beads in which the number of cells present along those surface parts of radii which range from the bead surface to a depth of 0.2 mm from the surface is from 3 to 20 per mm and to the bead center is 10 or larger per mm, the number of the number of cells present along those inner parts of the radii which range from a depth of 1 mm from the bead surface to the bead center is 10 or larger per mm, the number of cells present along said surface parts being smaller than the number of cells present along said inner parts.Type: GrantFiled: May 3, 1996Date of Patent: April 14, 1998Assignee: Mitsubishi Chemical BASF Company LimitedInventors: Hiroki Shinozaki, Masayuki Tanaka, Yonezo Ueda
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Patent number: 5726214Abstract: Fluoropolymer having unstable end groups is used to form foamed fluoropolymer structures without added blowing agent.Type: GrantFiled: December 26, 1996Date of Patent: March 10, 1998Assignee: E. I. du Pont de Nemours and CompanyInventors: Marlin Dwight Buckmaster, Stuart Karl Randa
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Patent number: 5719199Abstract: A flexible closed cell polymeric foam contains expandable graphite as fire retardant. The foam is prepared by mixing a polymer, a curing agent, at least one blowing agent and an expandable graphite at a temperature of at least 100.degree. C. but below a temperature causing activation of the blowing agent to foam a foamable mixture and thereafter heating the foamable mixture to activate the blowing agent and cause foaming. The method of preparation may additionally include a curing step in which the foamable mixture is heated under pressure to activate simultaneously each of a curing agent, which is preferably a free radical curing agent, and a foaming agent. The foams are capable of meeting the U.S. Federal Aviation Authority Standards, especially the oil burner test of FAR 25 Appendix F, part II.Type: GrantFiled: March 19, 1997Date of Patent: February 17, 1998Assignee: Kay-Metzeler LimitedInventors: William R. Wallace, Ronald J. Baumforth
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Patent number: 5717000Abstract: This invention relates to a polymer foam prepared by dispersing an organophilic multi-layered material into a melt comprising an olefinic or styrenic polymer having polar functionality so that at least a portion of the polymer intercalates between layers of the particles; and expanding the polymer with a blowing agent under such condition to form the polymer foam. The organophilic multi-layered material can also be dispersed into an olefinic or styrenic monomer, which can then be polymerized to form a polymer melt prior to, or along with the foaming step.Type: GrantFiled: February 20, 1997Date of Patent: February 10, 1998Assignee: The Dow Chemical CompanyInventors: Seema V. Karande, Chai-Jing Chou, Jitka H. Solc, Kyung W. Suh
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Patent number: 5712018Abstract: A water-based embossing composition for use in chemically embossing a foamable polymeric material having a blowing agent incorporated therein comprising: (A) a film-forming resin dissolved or dispersed in said aqueous composition; (B) a modifier which is effective in modifying the activity of the blowing agent comprising particulate solids which are substantially insoluble and uniformly dispersible in the liquid medium of the embossing composition and which have an average particle size of no greater than about 100 microns, said modifier being present in the composition in an amount of at least about 3 wt. %; and (C) optionally, a colorant or a softening agent for the modifier solids or a mixture thereof.Type: GrantFiled: July 1, 1996Date of Patent: January 27, 1998Assignee: Congoleum CorporationInventor: Rudolf Frisch