Hydrophilic Or Hydrophobic Cellular Product Patents (Class 521/905)
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Patent number: 4384051Abstract: A flexible hydrophilic MDI based polyurethane foam is produced by mixing together an aqueous phase which can optionally contain reinforcing fibers and surfactants and a resin phase comprising a prepolymer derived from a poly (oxy C.sub.2-4 alkylene) diol, an MDI containing isocyanate product having a functionality greater than 2.0 made of a mixture of MDI and isocyanate containing derivatives of MDI, and a polymeric poly (oxy C.sub.2-4 alkylene) polyol cross-linking agent having 3 or 4 hydroxyl equivalents per mole and a molecular weight of at least 500. The preferred polyol is Poly G176-120. The polymeric polyol cross-linking agent is present so the hydroxy equivalents constitute 5 to 35 mole % of the total hydroxy equivalents in the diol and the polymeric polyol while the ratio of the isocyanate equivalents to the total hydroxyl equivalents is in the range of 2.5 to 3.5.Type: GrantFiled: October 26, 1981Date of Patent: May 17, 1983Assignee: W. R. Grace & Co.Inventor: James L. Guthrie
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Patent number: 4383079Abstract: The cure time of polyurethane prepolymer curable with water to form polyurethane hydrogel is prolonged by the addition to the water of certain micelle-forming adducts which substantially extend the cure time.Type: GrantFiled: April 9, 1981Date of Patent: May 10, 1983Assignee: Minnesota Mining and Manufacturing CompanyInventors: Alton J. Gasper, James N. Wells
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Patent number: 4381380Abstract: There is provided a polymeric bacteriocidal composition comprising a thermoplastic, partially cross-linked polyurethane having --NH--(C.dbd.O)--O-- urethane linkages and/or urea linkages --NH--(C.dbd.O)--NH-- and iodine complexed with a sufficient number of these linkages to provide bacteriocidal properties to said composition. The polyurethane has an average molecular weight between 35,000 and 50,000, an ultimate elongation of 200 to 800% and a Shore A scale hardness of 60 to 95. The composition is shaped into a conventional medical appliance form, e.g. a catheter.Type: GrantFiled: November 3, 1980Date of Patent: April 26, 1983Inventors: Harry H. LeVeen, Jeanette L. Rubricius, Eric G. LeVeen, Robert F. LeVeen
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Patent number: 4377645Abstract: An MDI based polyurethane foam having cellulose foam properties is produced by mixing together an aqueous phase which can optionally contain reinforcing fibers and surfactants and a resin phase comprising a prepolymer derived from a poly(oxy C.sub.2-4 alkylene)diol, an MDI containing isocyanate product having a functionality greater than 2.0 made of a mixture of MDI and isocyanate containing derivatives of MDI, and a monomeric polyol cross-linking agent having 3 or 4 hydroxyl equivalents per mole. The preferred polyol is trimethylolpropane and the preferred diol is Carbowax 1000. The diol and the polyol, such as trimethylolpropane, are present in a mole ratio in the range of 4:1 to 8:1 while the ratio of the isocyanate equivalents to the total hydroxyl equivalents is in the range of 3:1 to 4:1. The isocyanate containing product comprises more than 50% by weight of the prepolymer and Isonate 143L is the preferred isocyanate product. The foam has a minimal swell when wet and it does not curl upon drying.Type: GrantFiled: October 26, 1981Date of Patent: March 22, 1983Assignee: W. R. Grace & Co.Inventors: James L. Guthrie, Suze E. Arquette
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Patent number: 4367259Abstract: A sound deadening material is obtained with a very high loading of sound damping materials such as barium sulfate, calcium carbonate or metal powders. These materials are mixed with water and are bound together by adding a water-miscible isocyanate-terminated prepolymer which reacts with the water to form a cross-linked binder.Type: GrantFiled: July 27, 1981Date of Patent: January 4, 1983Assignee: W. R. Grace & Co.Inventors: Glenn E. Fulmer, Louis L. Wood
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Patent number: 4365025Abstract: Flexible polyurethane foams are made from isocyanate containing prepolymers where the isocyanate is a mixture of diphenylmethane diisocyanate (MDI) and polymeric forms of MDI. The isocyanate mixture has a functionality greater than 2.0. The prepolymer is an isocyanate capped polyol or mixture of polyols where the polyols are diols or triols having at least 50% by weight oxyethylene groups. The foams are made by reacting water with the prepolymer and fire retardant materials can be added to the reaction mixture to produce fire retardant foams. The foams have improved physical properties and flammability resistance.Type: GrantFiled: December 8, 1981Date of Patent: December 21, 1982Assignee: W. R. Grace & Co.Inventors: Robert M. Murch, Louis L. Wood
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Patent number: 4359558Abstract: Polyurethane diacrylate compositions are obtained by reacting a diacrylate in the presence of from about 30 to about 95 weight percent of a hydrophilic polyurethane resin. The resulting products will form a hydrogel upon immersion in water and are permeable to gases, ions and other low molecular weight species. The hydrophilic polyurethane diacrylate compositions may be molded to form shaped products that are dimensionally stable after repeated exposure to boiling water and exhibit memory.Type: GrantFiled: November 12, 1980Date of Patent: November 16, 1982Assignee: Tyndale Plains-Hunter, Ltd.Inventors: Francis E. Gould, Christian W. Johnston
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Patent number: 4339500Abstract: Grains of a totally porous, hydroxyl group-containing, nonionic and hydrophilic synthetic cross-linked polymer having alcoholic hydroxyl and ether groups as main hydrophilic groups and having as a main skeleton a chemical structure including carbon atoms, hydrogen atoms and oxygen atoms bonded through single bonds, said synthetic polymer having a hydroxyl group density of 1 to 15 milliequivalents/g, a specific surface area of 5 to 1000 m.sup.2 /g and a water regain of 0.3 to 3.0 g/g. Such grains have been found to be a packing material or gel for high speed, aqueous gel permeation chromatography. The packing material of the present invention which comprises grains of a hydroxyl group-containing nonionic and hydrophilic synthetic cross-linked polymer has a chemical structure obtained by reacting a totally porous, hydroxyl group-containing, nonionic polymer with a polyfunctional substance capable of reacting with the hydroxyl groups of said polymer while forming cross-linking ether groups.Type: GrantFiled: October 14, 1980Date of Patent: July 13, 1982Assignee: Asahi Kasei Kogyo Kabushiki KaishaInventors: Yuzo Yanagihara, Kohji Noguchi, Hiroshi Suzuki, Makoto Honda
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Patent number: 4329436Abstract: A method of forming a hydrophilic urethane prepolymer useful in consolidating aggregate material comprises the steps of adding an isocyanate compound to a hydrophilic polyether or polyester compound which has been heated to such a temperature that the temperature of the reactants after addition of isocyanate is at least as high as about 120.degree. C. The resulting urethane prepolymer may be reacted with an aqueous slurry of unconsolidated aggregate material, such as peat, to form a consolidated aggregate product, such as a plant growth-supporting rooting medium.Type: GrantFiled: May 8, 1981Date of Patent: May 11, 1982Inventor: Richard R. Dedolph
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Patent number: 4314034Abstract: An open cell polyurea polyurethane foamed sponge is produced by mixing together a resin and an aqueous pahse. The resin phase consists of a prepolymer made from a hydrophilic oxyalkylene polyol which is capped with isocyanate groups and from about 1-30% by weight of the prepolymer of a polymeric polysocyanate such as a PAPI resin. The aqueous phase contains water, reinforcing fibers, surfactants, a thickening agent and preferably up to 40% by weight of diatomaceous earth. The resulting foam has a reduced volume swell, rapid wet out and improved wet strength.Type: GrantFiled: December 29, 1980Date of Patent: February 2, 1982Assignee: W. R. Grace & Co.Inventors: Glenn E. Fulmer, Conrad Vollmerhausen
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Patent number: 4309509Abstract: This invention relates to hydrophilic, odorant-containing foam compositions having improved release ability of the odorant abetted by incorporating the odorant into a non-volatile, water insoluble oil or wax medium which is added to an aqueous reactant prior to reacting the aqueous reactant with a hydrophilic, isocyanate-terminated prepolymer to form a polyurethane foam.Type: GrantFiled: March 10, 1980Date of Patent: January 5, 1982Assignee: W. R. Grace & Co.Inventor: Louis L. Wood
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Patent number: 4305977Abstract: A process for improving the water vapor permeability of polyurethane coatings by incorporating a hydroxy alkyl amine, an alkoxylated amine or the salt of either with an inorganic or organic acid into the coating composition is taught. Coating compositions including this water vapor diffusion enhancing additive are also taught as is a process for coating water vapor permeable substrates.Type: GrantFiled: September 24, 1979Date of Patent: December 15, 1981Assignee: Bayer AktiengesellschaftInventors: Werner Kubitza, Gerhard Mennicken
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Patent number: 4302334Abstract: A microporous polymeric membrane is made by preparing a polymer-casting solution, casting a thin film of the casting solution on a support base, allowing partial evaporation of the solvent from the cast film for a predetermined period of time and contacting the partially evaporated film with a leaching liquid to provide the microporous membrane. A membrane with particularly good mechanical strength and hydrophilic properties is formed when the casting solution comprises a vinylidene fluoride polymer and from about 35 to about 85% by weight of a vinyl acetate polymer; and when the acetate polymer is hydrolyzed after the leaching step to convert the acetate groups to hydroxyl groups.Type: GrantFiled: September 21, 1979Date of Patent: November 24, 1981Assignee: Abcor, Inc.Inventors: Stephen Z. Jakabhazy, Leos J. Zeman
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Patent number: 4292412Abstract: This invention relates to new, hydrophilic, fabric softener foam compositions having improved release ability of the fabric softener abetted by the addition of a hydrophilic polyether polyol release agent to the aqueous reactant containing the fabric softener prior to reacting the aqueous reactant with a hydrophilic, isocyanate-terminated prepolymer to form the foam.Type: GrantFiled: January 16, 1980Date of Patent: September 29, 1981Assignee: W. R. Grace & Co.Inventor: Louis L. Wood
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Patent number: 4271272Abstract: This disclosure teaches synthetic polyurethane sponges manufactured with at least 4% of one or more additives dispersed therein. The additives may be soap, lotions, detergents, pesticides, lanolin, scouring particles, silicone oils, bath oils, or the like or combinations thereof. The sponges' skeletons are developed by reaction of a polyether or a polyester with a suitable isocyanate in the presence of a catalyst with the additives entrapped in voids of the sponges. An additive bearing material, i.e. a carrier material containing the additive is prepared. The carrier material is then mixed into a foam forming reaction mass. By this expedient the additive does not impair desired foam formation. The sponges are provided with high liquid absorbency and fine "hand" by virtue of manufacturing methods and specific catalysts employed.Type: GrantFiled: October 30, 1978Date of Patent: June 2, 1981Inventors: Robert L. Strickman, Melvyn B. Strickman
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Patent number: 4266043Abstract: A resilient hydrophobic foamed polymer obtained by reacting a mixture of an isocyanate terminated urethane prepolymer and a polyisocyanate (A) with aqueous material, said prepolymer being relatively hydrophilic and the reaction product of a molar excess of a polyisocyanate (B) with a polyetherpolyol having from 15 to 50% by weight of oxethylene content, said aqueous material having a water content between about 15 to 150% by weight based on said prepolymer, the amount of said polyisocyanate (A) ranging between about 5 to 15% by weight based on said prepolymer, said polyetherpolyol being selected from the group consisting of (a) the addition polymerization product of a starting material, ethylene oxide and another epoxide and (b) a mixture of at least two of the following:(1) The addition polymerization product of a starting material and ethylene oxide;(2) the addition polymerization product of a starting material and an epoxide other than ethylene oxide;(3) the addition polymerization material, ethylene oxideType: GrantFiled: November 5, 1979Date of Patent: May 5, 1981Assignee: Toyo Rubber Chemical Industrial CorporationInventors: Osamu Fujii, Toshio Kishimoto, Akio Kobayashi
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Patent number: 4263363Abstract: A water-in-oil emulsion at a ratio of 80/20 or less when incorporated into a water absorbing material (such as a polyurethane sponge) will aid in retaining water that may be subsequently added to the absorbing material. The effect is believed due to the increased viscosity of the emulsion when water is added. The effect is particularly useful for improving urine retention of diapers, such as disposable diapers or similar articles.Type: GrantFiled: December 20, 1979Date of Patent: April 21, 1981Assignee: Colgate-Palmolive CompanyInventors: Charles E. Buck, Robert C. Roga
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Patent number: 4252907Abstract: A porous composite material includes a porous body formed of a hydrophobic polymer such as polyvinyl chloride and a layer of a hydrophilic polymer such as polyvinyl alcohol provided over at least a portion of the interior surface of each of the pores of the porous body. The composite material is obtained by a process including the steps of dispersing an aqueous solution containing a hydrophilic polymer and a foaming agent into a solution of a hydrophobic polymer in an organic solvent to form an emulsion, removing the water and the organic solvent from the emulsion to obtain a solid, and subjecting the solid to foaming conditions.Type: GrantFiled: September 4, 1979Date of Patent: February 24, 1981Assignee: Director General of Agency of Industrial Science and TechnologyInventor: Tatsuo Ogasa
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Patent number: 4247656Abstract: Novel poly(urethane-isocyanurate) foams and their preparation are described. These foams are low density, non-friable, heat stable, polymeric reaction products of polyisocyanate and polyoxyalkylene polyol, the reaction products having a cross-link density in the range of about 1 cross-link per 400 to 750 atomic weight units. Processes are also provided for forming a foamed isocyanate-derived polymer on an oil-contaminated substrate and obtaining a firm bond of the polymer to the substrate.Type: GrantFiled: March 14, 1979Date of Patent: January 27, 1981Assignee: Minnesota Mining and Manufacturing CompanyInventor: Edward W. Janssen
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Patent number: 4241537Abstract: A plant growth media in the form of a gel which is useful for growing plants in the form of seeds, seedlings, cuttings, nursery stock, etc., is obtained by dissolving a water-soluble polyisocyanate capped prepolymer containing said growing plant in an aqueous medium optionally containing various plant growth additives such as fertilizer, agricultural modified minerals and the like. The media can be formed in a variety of shapes.Type: GrantFiled: May 10, 1979Date of Patent: December 30, 1980Assignee: W. R. Grace & Co.Inventor: Louis L. Wood
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Patent number: 4240918Abstract: Novel anti-soiling and anti-redeposition adjuvants for detergent compositions include at least one polymer A, said polymer itself having anti-soiling and anti-redeposition properties, at least one solubilizing and dispersing agent B for said polymer A, and at least one water repellent C for said agent B.Type: GrantFiled: November 2, 1978Date of Patent: December 23, 1980Assignee: Rhone-Poulenc IndustriesInventors: Alain Lagasse, Bernard Papillon
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Patent number: 4237237Abstract: Hydrophobic polyurethane foams which have densities of from 4 to 15 g/liter and in which the number of closed cells is from 2 to 30%, and the number of open cells from 98 to 70%, based on the total number of cells, are obtained from polyisocyanates, polyhydroxy compounds, catalysts and water, with or without lipophilic compounds, the components being reacted in such amounts that the ratio of hydrogen atoms capable of undergoing a Zerewitinoff reaction to NCO groups is from 1.3 to 10:1. The foams are suitable for the absorption of oil and/or by hydrophobic solvents, which may or may not contain halogen, from water.Type: GrantFiled: April 30, 1979Date of Patent: December 2, 1980Assignee: BASF AktiengesellschaftInventors: Wolfgang Jarre, Rolf Wurmb
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Patent number: 4235988Abstract: A sustained release delivery means comprising a biologically active agent and a hydrophilic linear block poly oxyalkylene- polyurethane copolymer.Type: GrantFiled: May 31, 1979Date of Patent: November 25, 1980Assignee: Imperial Chemical Industries LimitedInventors: Francis J. T. Fildes, Francis G. Hutchinson
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Patent number: 4230566Abstract: A granular polyurethane cellular medium for absorbing water-borne, water insoluble hydrocarbons, method for its preparation and production system. The granular medium is formed by prereacting polyisocyanate or a prepolymer with a linear monohydric alcohol to form a prepolymer. This prepolymer subsequently is reacted with a polyol and blowing agent within a flexible sheet bun mold. Following molding of the bun within the flexible sheet, the bun is transferred to a comminution stage within a predetermined time period whereupon it is granulated. The material is fabricable at low cost and under a broad range of environmental conditions permitting flexibility in selecting the site for production of the material. The material exhibits an unusually high affinity for the water-borne contaminant hydrocarbons, does not absorb water and lends itself to low-cost production procedures.Type: GrantFiled: June 28, 1978Date of Patent: October 28, 1980Assignee: Petrozorbent CorporationInventor: Thomas L. Faudree, III
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Patent number: 4226944Abstract: Fragrance-emitting articles comprising a polyurethane foam containing a particulate filler and a fragrance material, and a method of making such articles, are disclosed. The method includes the essential steps of pre-mixing particulate filler and fragrance and dispersing the pre-mix in a liquid polyol, before adding the other reaction mixture components, and provides a polyurethane foam having a controlled rate of release of the fragrance.Type: GrantFiled: November 13, 1978Date of Patent: October 7, 1980Assignee: Tenneco Chemicals, Inc.Inventors: Herman Stone, Peter D. Pauly
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Patent number: 4211847Abstract: This invention relates to urethane forming compositions and a method of forming polyurethanes having low residual potentially carcinogenic aromatic amines by adding scavengers from the group comprising cyclohexyl monoisothiocyanate and hindered aliphatic monoisocyanates of the general formula: ##STR1## wherein R.sub.1 - R.sub.7 are H, alkyl, cycloalkyl, aryl, alkaryl, aralkyl or mixtures thereof and x is 1 to 7.Type: GrantFiled: November 20, 1978Date of Patent: July 8, 1980Assignee: W. R. Grace & Co.Inventors: Clifton L. Kehr, Louis L. Wood, James L. Guthrie
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Patent number: 4202880Abstract: Sustained release delivery means comprising (i) a biologically active agent, (ii) a linear hydrophilic block polyoxyalkylene-polyurethane copolymer, and (iii) optionally containing a buffer. Included among the biologically active agents are abortifacient compounds.Type: GrantFiled: November 28, 1977Date of Patent: May 13, 1980Assignee: Imperial Chemical Industries LimitedInventors: Francis J. T. Fildes, Francis G. Hutchinson
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Patent number: 4201846Abstract: The invention disclosed relates to hydrophilic polyurethane foam which exhibits improved tensile and tear properties and reduced shrinkage upon drying as a result of incorporation of substantially hydrophilic reinforcing fibers formed from homopolymers and copolymers of polyvinyl alcohol. The reinforced foams also exhibit reduced swelling upon contact with water.Type: GrantFiled: November 24, 1978Date of Patent: May 6, 1980Assignee: W. R. Grace & Co.Inventors: Clifton L. Kehr, Louis L. Wood, Nelson S. Marans, Glenn E. Fulmer
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Patent number: 4200700Abstract: A method of after-foaming a mixture containing a foam and a resin solution. The foam component is brought into contact with the resin solution by means of a suction action. The after-foaming is produced due to said suction action and by superfluous air present.Type: GrantFiled: May 12, 1978Date of Patent: April 29, 1980Assignee: IDC Chemie AGInventor: Karl Mader
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Patent number: 4197371Abstract: This invention relates to an improvement in a sheet material comprising natural or synthetic rubber or a rubber-like polymer, which is capable of absorbing and transmitting water vapor and which contains a uniformly incorporated addition of polymer particles, the improvement that the addition comprises particles of at least one swellable modified polymer. The invention also relates to a process for the manufacture of the sheet material.Type: GrantFiled: August 10, 1978Date of Patent: April 8, 1980Assignee: Hoechst AktiengesellschaftInventors: Arno Holst, Walter Schermann, Wilhelm Fischer
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Patent number: 4193887Abstract: Filled detergent hydrophilic flexible polyurethane foams having a reduced and controlled rate of release of detergent from the foam are provided.Type: GrantFiled: August 18, 1978Date of Patent: March 18, 1980Assignee: Tenneco Chemicals, Inc.Inventors: Herman Stone, Peter D. Pauly
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Patent number: 4191815Abstract: A hydrophile polyurethane foam prepared from a hydrophile polyol, a polyisocyanate in which NCO groups are not directly bonded to an aromatic ring, a surface active agent, a swelling agent and a catalyst comprising:(A) at least one compound selected from the group consisting of:(1) diazabicyclo-alkenes of formula: ##STR1## (2) substituted guanidines and salts of formula: ##STR2## (3) substituted biguanidines of formula: ##STR3## (4) substituted biguanidines of formula: ##STR4## wherein the substituents can have different meanings, and (B) at least an alkali metal or alkaline earth metal salt of organic acids having a dissociation constant Ka<10.sup.-1.Type: GrantFiled: March 11, 1977Date of Patent: March 4, 1980Assignee: s.a. PRBInventors: Lucien Jourquin, Eddie Du Prez
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Patent number: 4183984Abstract: Closed cells in a flexible foam structure and preferably a polyethylene foam sheet are opened, suitably by needle punching, to increase the oil sorbency of the pad. One embodiment uses needle punching which does not pass all the way through the sheet, thus blocking passage of oil therethrough. Another embodiment employs unpunched strips for prevention of migration of the oil or for buoyancy purposes.Type: GrantFiled: October 27, 1977Date of Patent: January 15, 1980Assignee: Conwed CorporationInventors: Scott D. Browers, Donald E. Wiegand
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Patent number: 4181780Abstract: This invention relates to a novel elastomeric foamed material which has been found to exhibit a variety of unusual and desirable features both in its physcial properties and in its process of manufacture. These foamed compositions of a lightly sulfonated elastomeric gum contain a non-volatile polar plasticizer and preferably extenders such as oil and fillers. These elastomer foams exhibit an unusal profile of physical properties including extremely rapid production, melt reprocessability of fabricated articles, a novel memory characteristic, and high temperature reshaping of foamed objects while maintaining a good foam structure. These novel foams can be manufactured with relatively uniform cell structures and with small cell sizes at foam densities from near bulk density to less than 0.1g/cc.Type: GrantFiled: January 5, 1979Date of Patent: January 1, 1980Assignee: Exxon Research & Engineering Co.Inventors: Douglas Brenner, Robert D. Lundberg
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Patent number: 4174427Abstract: Expandable-polystyrene beads suitable for use in making impervious containers are made from a recipe including styrene, free-radical initiator and polyvinyl pyrrolidone, and this practice includes a step of washing the beads in a warm aqueous solution to which an alkoxylated nonionic surfactant having 70-90 percent of its molecular weight accounted for by oxyethylene units is added in an amount effective to cause the washing to remove contaminating grafted polyvinyl pyrrolidone from the surface of the beads and cause them to become expandable into impervious product containers.Type: GrantFiled: July 21, 1978Date of Patent: November 13, 1979Assignee: BASF Wyandotte CorporationInventors: Pauls Davis, Herbert H. Gahmig, Irving R. Schmolka
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Patent number: 4164512Abstract: This invention relates to a novel elastomeric foamed material which has been found to exhibit a variety of unusual and desirable features both in its physical properties and in its process of manufacture. These foamed compositions of a lightly sulfonated elastomeric gum contain a non-volatile polar plasticizer and preferably extenders such as oil and fillers. These elastomer foams exhibit an unusual profile of physical properties including extremely rapid production, melt reprocessability of fabricated articles, a novel memory characteristic, and high temperature reshaping of foamed objects while maintaining a good foam structure. These novel foams can be manufactured with relatively uniform cell structures and with small cell sizes at foam densities from near bulk density to less than 0.1g/cc.Type: GrantFiled: November 29, 1977Date of Patent: August 14, 1979Assignee: Exxon Research & Engineering Co.Inventors: Douglas Brenner, Robert D. Lundberg
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Patent number: 4160076Abstract: The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams which simulate natural sponges and prepared by reacting an isocyanate capped polyoxyethylene polyol reactant with an aqueous reactant and a carefully balanced combination of a nonionic surface-active agent and a liquid defoaming agent. The resultant foams are characterized by a majority of large size cells and membranes which themselves are foamed with small cells.Type: GrantFiled: July 15, 1977Date of Patent: July 3, 1979Assignee: W. R. Grace & Co.Inventors: James L. Guthrie, Donald J. Bach
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Patent number: 4158087Abstract: Disclosed herein are hydrophilip polyether urethane foams having reduced resiliency and prepared by reacting a polyoxyalkylene urethane prepolymer containing at least 40 mole percent of oxyethylene units; water; and at least about 50 parts, based on the weight of the prepolymer, of a synthetic polymer latex.Type: GrantFiled: May 27, 1977Date of Patent: June 12, 1979Assignee: W. R. Grace & Co.Inventor: Louis L. Wood
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Patent number: 4153763Abstract: Disclosed is a process for producing expandable beads of vinyl aromatic polymer resin which provide cellular materials having a smaller and more uniform cell size, comprising the steps of suspension polymerizing beads of the vinyl aromatic polymer resin, and impregnating the beads while in suspension with a liquid blowing agent in the presence of an emulsifier comprising a diethanolamide of a fatty acid containing from 12 to 20 carbon atoms, and having a hydrophilic-lipophilic balance lower than 15.Type: GrantFiled: May 18, 1978Date of Patent: May 8, 1979Assignee: Labofina S. A.Inventor: William J. I. Bracke
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Patent number: 4143004Abstract: A process is provided for the preparation of soft hydrophilic polyurethane foam using a polyether polyol mixture having a high proportion of primary alcohol groups and a selected ratio of polyisocyanate to polyol.Type: GrantFiled: September 29, 1977Date of Patent: March 6, 1979Assignee: Berol Kemi ABInventors: Mats V. Stromblad, Bo T. Idstrom
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Patent number: 4139686Abstract: A process for making a hydrophilic polyurethane foam suitable for sponges and wiping cloths which comprises reacting an organic polyisocyanate and an organic compound having reactive hydrogen atoms in a mixture containing a blowing agent and an alkyl aryl sulphonic acid.Type: GrantFiled: June 6, 1977Date of Patent: February 13, 1979Assignee: Bayer AktiengesellschaftInventors: Gert Jabs, Gunther Loew
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Patent number: 4137200Abstract: The invention disclosed is for new improved hydrophilic crosslinked polyurethane foams prepared by reacting a blend of a monomeric polyol and polyoxyalkylene glycol (the --OH groups of said blend being capped with a polyisocyanate) with large amounts of an aqueous reactant. The resultant foams may be characterized with a broad spectrum of improved properties including hydrolytic stability and tensile strength.Type: GrantFiled: June 10, 1977Date of Patent: January 30, 1979Assignee: W. R. Grace & Co.Inventors: Louis L. Wood, Kurt C. Frisch
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Patent number: 4132839Abstract: Disclosed herein are novel prepolymers which, when foamed provide hydrophilic polyurethane foams which are biodegradable.Type: GrantFiled: September 16, 1977Date of Patent: January 2, 1979Assignee: W. R. Grace & Co.Inventors: Nelson S. Marans, Alan R. Pollack
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Patent number: 4129694Abstract: The invention disclosed relates to a new fabric softener foam having improved utility for softening textile fabrics in either a standard or automatic clothes dryer as well as in an automatic washer.Type: GrantFiled: April 7, 1976Date of Patent: December 12, 1978Assignee: W. R. Grace & Co.Inventors: Joseph A. Cogliano, Clifton L. Kehr
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Patent number: 4128512Abstract: The instant invention is directed to the post treatment of flexible polyurethane foams. It has been found that the water absorbency and penetration of flexible polyurethane foams can be enhanced by washing and/or impregnating the foam with an aqueous solution of specified organic siloxane surfactants and allowing the treated foam to dry.Type: GrantFiled: October 26, 1977Date of Patent: December 5, 1978Assignee: Mobay Chemical CorporationInventors: Keith G. Spitler, David A. Radovich
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Patent number: 4127124Abstract: Bioimplant three dimensional latice of hydrophilic polyurethane having a backbone of polyetherol or polyesterol, end-capped with aliphatic or aromatic diisocyanate, chain branched with polyol and bound into a latice by chain extension alkyl diols. The method of producing such a latice. An extension would be the use of the latice for other medical and veterinary purposes.Type: GrantFiled: May 12, 1977Date of Patent: November 28, 1978Assignee: W. R. Grace & Co.Inventors: Donald C. Clagett, Michael J. Svetly, Peter H. Scott
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Patent number: 4127516Abstract: Disclosed herein is a polyurethane foam having good wet strength. The foam is prepared by reacting a urethane prepolymer with large amounts of water containing a poly(amino)urea and optionally other ingredients, e.g. surfactants. The poly(amino)urea is characterized as being the water soluble reaction product of a polyamine with a urethane prepolymer, said reaction product being further reacted with a crosslinking agent, e.g. epichlorohydrin.Type: GrantFiled: February 28, 1977Date of Patent: November 28, 1978Assignee: W. R. Grace & Co.Inventors: Donald W. Larsen, Louis L. Wood
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Patent number: 4127515Abstract: A hydrophilic flexible open-celled poly (urea/urethane) sponge derived from prepolymer produced by reaction of a polyoxyalkylene polyol with a stoichiometric excess of an organic polyisocyanate, said sponge containing uniformly distributed therethrough a readily releasable wax composition, and methods of making and using same for waxing surfaces.Type: GrantFiled: November 1, 1976Date of Patent: November 28, 1978Assignee: Colgate-Palmolive CompanyInventors: David M. MacRae, Karl H. Roberts
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Patent number: 4124518Abstract: There is disclosed a one-shot process for the manufacture of a filled detergent hydrophilic flexible polyurethane foam from a clay filler, an alkylaryl sulfonate detergent, a normally liquid polyether polyol, tolylene diisocyanate and water as a blowing agent.Type: GrantFiled: March 24, 1977Date of Patent: November 7, 1978Assignee: Tenneco Chemicals, Inc.Inventors: Herman Stone, Peter D. Pauly
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Patent number: 4119757Abstract: Hydrophilic floral display foam blocks are prepared from frothed urea-formaldehyde, and wherein the urea-formaldehyde contains an alkyl-aryl sulfonate, and wherein the alkyl-aryl sulfonate has been exposed to an aqueous solution of a quaternary ammonium salt in an amount sufficient to provide at least equal molar concentrations of the quaternary ammonium salt to the alkyl-aryl sulfonate present in the foam. The urea-formaldehyde foam may also contain quantities of sodium molybdate to enhance the stability and lifetime of cut flowers retained in the foam material. Also, the urea-formaldehyde foam may contain starch to help suppress the free formaldehyde odor and help increase the biodegradability of the cured foam. The resulting foam is hydrophilic in nature, and hence is readily wetted, with the hydrophilic characteristic not adversely affecting the life of cut flowers retained therein.Type: GrantFiled: December 23, 1977Date of Patent: October 10, 1978Assignee: H & S Industries, Inc.Inventors: John A. Hobson, Paul K. Schilling