Process Of Forming A Cellular Product From An Aqueous Latex, Aqueous Dispersion, Or Aqueous Emulsion Containing A Solid Polymer; Process Of Preparing A Latex, Dispersion, Or Emulsion Containing A Solid Polymer Which Is Designed To Be Formed Into A Cellular Product, Or Composition Thereof Patents (Class 521/65)
Adding -n=c=x material to a latex, dispersion, or emulsion containing a solid polymer (Class 521/67)
-
Patent number: 5494939Abstract: The material contains interrelated micro- and anisodiametric macropores which latter are disposed mainly on peripheral portions. The volume ratio of micro- and macropores is 1:3-7.The process involves freezing a polymer dispersion at a temperature ensuring a 3-11:1 ratio of dispersed phase to the noncrystallized dispersion medium, seasoning the conjugate-dispersed system at a temperature and within a time sufficient for reversal of phases, followed by thawing. The used polymer dispersion contains a liquid crystallizable dispersion medium and a polymer phase capable of autohesion at temperatures below the initial melting temperature of crystals in the dispersion medium.Type: GrantFiled: January 10, 1994Date of Patent: February 27, 1996Assignees: A. H. Hides, Skins Australia Pty Ltd.Inventors: Efim S. Vainerman, Irina B. Portnaya
-
Patent number: 5494940Abstract: A crosslinked, highly porous body derived from a water-soluble, hydrogel polymer, wherein the porous body is characterized in that it has an open-celled 3-dimensional lattice structure, a density of less than about 1.0 g/cm.sup.3, a surface area of equal to or greater than about 30 m.sup.2 /g, and a compression strength of equal to or less than about 75% yield at 300 psi.Type: GrantFiled: March 8, 1993Date of Patent: February 27, 1996Assignee: AlliedSignal Inc.Inventors: Peter D. Unger, Ronald P. Rohrbach
-
Patent number: 5470887Abstract: Vesiculated polymer beads are prepared in which a water-in-oil-in-water emulsion containing a cross-linkable polymer and a copolymerizable monomer in the oil phase is heated in the presence of an initiator to cure the polymer beads, wherein curing is commenced in a first stage in the presence of a substantially water-insoluble initiator and, when the beads are sufficiently stable, curing is completed in a second stage in the presence of an at least partially water-soluble initiator. Preferably, the completion of curing is carried out at a temperature higher than that of the first stage. The beads can be used in low odor paint formulations.Type: GrantFiled: April 25, 1994Date of Patent: November 28, 1995Assignee: Imperial Chemical Industries, PLCInventors: Neil Perrins, Mary E. Kelly
-
Patent number: 5451454Abstract: A blend of high-molecular and a low-molecular organic material contains the high-molecular organic material in a proportion smaller than that of the low-molecular organic material, and has a three-dimensionally continuous network skeleton structure formed by the high-molecular organic material. The structure preferably has an average cell or mesh diameter not exceeding 500 microns. The removal of the low-molecular organic material from the blend gives a functional porous material consisting of the high-molecular organic material. The replacement of the low-molecular organic material in the blend with a solid or liquid, or a mixture thereof, gives a functional composite material containing the solid or liquid, or their mixture in the network skeleton structure.Type: GrantFiled: December 14, 1992Date of Patent: September 19, 1995Assignee: Bridgestone CorporationInventors: Yoshihide Fukahori, Naruhiko Mashita, Akihiko Ogino, Shinichi Toyosawa, Takeshi Ohba, Yasushi Imai
-
Patent number: 5446072Abstract: An emulsion composition for flameproof foam sheet which comprises components (A)-(C) wherein the amount of component (B) is 5-50 parts by weight per 100 parts by weight of component (A) (based on solid content), and the amount of component (C) is 50-350 parts by weight per 100 parts by weight of component (A) (based on solid content):(A): An emulsion of ethylene-vinyl ester copolymer which is composed of 5-35% by weight of (a.sub.1) ethylene and 95-65% by weight of (a.sub.2) vinyl ester and, whose glass transition temperature is -25.degree. C.-+15.degree. C. and toluene-insoluble part is 30% or more by weight;(B): Thermal expansive hollow micro bead;(C): Inorganic filler.Type: GrantFiled: November 14, 1994Date of Patent: August 29, 1995Assignee: Sumitomo Chemical Co., Ltd.Inventors: Tatsuo Mitsutake, Shizuo Narisawa
-
Patent number: 5434192Abstract: Novel formulations for aqueous foams which, in the presence of hydrocarbons, can persist for 24 hours or more. The foams are suitable for the suppression of hydrocarbon and polar organic vapors.Type: GrantFiled: February 2, 1993Date of Patent: July 18, 1995Assignee: Atlantic Richfield CompanyInventors: Sophany Thach, Kenneth C. Miller, Karen S. Schultz
-
Patent number: 5430070Abstract: Newly developed polymeric materials are presented in a form of pellet, thread, sponge, rubber, or plate acting as a damper for shear mode and an absorber against outside noise. These materials provide multiple functions of damping, sound absorbency and insulation performance at audio frequency.Type: GrantFiled: December 16, 1994Date of Patent: July 4, 1995Assignee: Ryusuke KonoInventor: Ryusuke Kono
-
Patent number: 5384337Abstract: A poromeric material for maintaining an electrostatic charge is provided, the material including a matrix of fibers, a polymeric binder for binding the matrix, and electrets present substantially uniformly throughout the poromeric material. Also provided are methods for making the poromeric material. In one embodiment, a polymeric binder mixture having electrets substantially uniformly contained therein is formed. The matrix of fibers is impregnated with the mixture and cured, whereby the electrets are substantially uniformly distributed throughout the matrix to produce the electrostatic poromeric material. In an alternative embodiment, the electrets are contained in the fibers of the matrix. The poromeric material may be used to encase a core to form a roller, for example, a hickey-removing roller.Type: GrantFiled: February 5, 1993Date of Patent: January 24, 1995Inventor: William D. Budinger
-
Patent number: 5360826Abstract: An expandable aqueous coating composition includes a polymeric binder including latex particles wherein the latex particles include a copolymer having a glass transition temperature of about -20.degree. C. to about +60.degree. C. and a weight average molecular weight of about 20,000 to about 500,000 and including expandable particles having a liquid blowing agent contained within a thermoplastic shell.Type: GrantFiled: February 16, 1994Date of Patent: November 1, 1994Assignee: Rohm and Haas CompanyInventors: Scott L. Egolf, Reginald T. Smart
-
Patent number: 5338766Abstract: An improved superabsorbent polymer foam having a morphology to provide improved absorptive properties is disclosed. The foam preferably comprises a superabsorbent polymer formed from a substantially water-soluble, unsaturated monomer having neutralized carboxyl groups and a substantially water-soluble internal crosslinking agent. The monomer and crosslinking agent are expanded in the presence of a substantially water-insoluble blowing agent and a suitable solvent and reacted to form a superabsorbent polymer foam having substantially continuous, intercommunicating channels substantially throughout the foam and a relatively high surface area to mass ratio.Methods for making the foam and absorbent products, members and articles containing the foam are also disclosed.Type: GrantFiled: March 26, 1993Date of Patent: August 16, 1994Assignee: The Procter & Gamble CompanyInventors: Dean V. Phan, Paul D. Trokhan
-
Patent number: 5334655Abstract: A method for reducing the amount of microfoam in a spray-applied clear waterborne polymeric composition is provided, wherein the clear composition contains certain emulsion-polymerized addition polymers or certain multi-staged emulsion-polymerized addition polymers is formed; is spray-applied to a substrate; and is dried. Also provided are substrates bearing such spray-applied clear compositions.Type: GrantFiled: December 9, 1993Date of Patent: August 2, 1994Assignee: Rohm and Haas CompanyInventors: Virginia A. Carlson, Maria E. Curry-Nkansah, Matthew S. Gebhard, Rosemarie P. Lauer
-
Patent number: 5332763Abstract: The present invention relates to an improved process for preparing foams comprising reacting polyisocyanates with an in situ produced stable low solids dispersion of polyureas and/or polyhydrazodicarbonamides in a hydroxyl-group-containing material as a dispersing agent by reacting:(a) organic polyisocyanates with(b) a member selected from the group consisting of (i) polyamines containing primary and/or secondary amino groups, (ii) hydrazines, (iii) hydrazides, or (iv) mixtures thereof, in(c) said hydroxyl-group-containing material.Type: GrantFiled: July 10, 1992Date of Patent: July 26, 1994Assignee: Miles Inc.Inventor: Mark A. Koshute
-
Patent number: 5331016Abstract: To arrive at an economical method of producing water-expanded polymer resin moldings, it is proposed that a monomer component and a cross-linker on an acrylate basis and/or a PMMA prepolymer be used as resin-forming components of a curable mixture.Type: GrantFiled: October 18, 1993Date of Patent: July 19, 1994Assignee: Schock & Co., GmbHInventors: Lothar Frank, deceased, Gunter Hieber
-
Patent number: 5328936Abstract: A process for making porous polymeric particles having high surface area includes suspending a discontinuous organic phase in an continuous aqueous phase, wherein the organic phase includes an ethylenically unsaturated monomer, a water soluble phase extender and a surfactant in an amount effective to solubilize the water soluble phase extender in the monomer and wherein the aqueous phase includes a diffusion barrier agent for limiting mass transfer of the phase extender from the organic phase to the aqueous phase, and then polymerizing the ethylenically unsaturated monomer to form the porous polymeric particles.Type: GrantFiled: February 1, 1993Date of Patent: July 12, 1994Assignee: Rohm and Haas CompanyInventors: Paul J. Leifholtz, Thomas E. Meteyer
-
Patent number: 5254599Abstract: To arrive at an economical method of producing water-expanded polymer resin moldings, it is proposed that a monomer component and a cross-linker on an acrylate basis and/or a PMMA prepolymer be used as resin-forming components of a curable mixture, with the weight ratio of the water component to the resin-forming component being at least 1:1.Type: GrantFiled: February 12, 1992Date of Patent: October 19, 1993Assignee: Schock & Co. GmbHInventor: Lothar Frank, deceased
-
Patent number: 5252622Abstract: An aqueous contact adhesive composition comprising an aqueous adhesive copolymer emulsion, the adhesive composition having a durometer hardness measured on the type A scale by ASTM D2240 of at least 20, and a blowing agent. The aqueous contact adhesive composition is applied as a coating to a surface of each of two substrates, then foamed, and substantially dried to provide a dry cellular adhesive coating. The adhesive-coated surfaces are then joined. The preferred contact adhesive composition comprises a vinyl acetate/ethylene/N-methylolacrylamide copolymer emulsion.Type: GrantFiled: November 12, 1991Date of Patent: October 12, 1993Assignee: Air Products and Chemicals, Inc.Inventor: Frank V. DiStefano
-
Patent number: 5252621Abstract: A polymeric bead has now been developed to act as a support for other entities having a volume mean diameter of up to 250 microns and having a surface provided with pores which form at least 10% by area of the surface. At least one third of the total area of the pores is provided by pores having a larger size of at least 0.4 micron. A method for the manufacture of such polymeric beads involves using a water-in-oil-in-water emulsion technique in which the amount of water used in the preparation of the aqueous phase is not greater than 125 parts by weight per 265 parts by weight of the mixture of the polyester resin and monomer which is used.The porous beads provide an excellent base for carrying enzymes, bacteria and catalysts species useful in a wide range of applications.Type: GrantFiled: July 1, 1991Date of Patent: October 12, 1993Assignee: Tioxide Group Services LimitedInventor: John C. W. Hodge
-
Patent number: 5180753Abstract: Compositions and a process for manufacture are provided for synthetic polymer-propellant systems that form cohesive foamed structures from which aqueous solutions can be expressed, where the useful temperature range over which these structures form is broadened by using a propellant mixture consisting predominantly of a propellant that is a poor solvent for the polymer and has a vapor pressure in the range of 10-35 psig at 20 C in combination with a small amount of a propellant that is a good solvent for the polymer; and where these coherent foamed structures can be formed even with aqueous solutions containing 0 to about 30% alcohol, provided that insoluble fine-particle solids that do not pack and become difficult to redisperse are included in the composition.Type: GrantFiled: October 30, 1990Date of Patent: January 19, 1993Inventors: Lloyd I. Osipow, Dorothea C. Marra, J. George Spitzer
-
Patent number: 5162487Abstract: Moldings, in particular foams and fibers, based on melamine/formaldehyde condensation products, in which from 0.1 to 70 mol % of the melamine have been replaced by melamine substituted by from 1 to 3 hydroxyoxaalkyl groups of the formula--(CH.sub.2 --CH.sub.2 --O).sub.n --CH.sub.2 --CH.sub.2 --OHn=1-5)have increased elasticity.Type: GrantFiled: August 13, 1991Date of Patent: November 10, 1992Assignee: BASF AktiengesellschaftInventors: Juergen Weiser, Wolfgang Reuther, Gerhard Turznik, Wolfgang Fath, Heinz Berbner, Onno Graalmann
-
Patent number: 5159046Abstract: The present invention relates to a process for the preparation of a modified 1,5-naphthylene diisocyanate containing urea and biuret groups comprising reacting(a) 1,5-naphthylene diisocyanate in molten form with(b) a mixture comprising about 0.02 to about 0.5 mole of water per mole of 1,5-naphthylene diisocyanate and about 1 to about 10 parts for each part of water of an organic solvent.The present invention further relates to a process for the preparation of elastomeric moldings comprising reacting by the one-shot or prepolymer process at an isocyanate index of 70 to 130 a modified 1,5-naphthylene diisocyanate containing urea and biuret groups with compounds containing at least two isocyanate-reactive groups and having a molecular weight in the range from about 500 to about 10,000 and, optionally, organic compounds containing isocyanate-reactive groups and having a molecular weight in the range from 60 to 499.Type: GrantFiled: June 26, 1990Date of Patent: October 27, 1992Assignee: Bayer AktiengesellschaftInventors: Gerhard Grogler, Andreas Ruckes, Richard Kopp, Heinrich Hess, Robert Eiben, James M. Barnes
-
Patent number: 5124363Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.Type: GrantFiled: March 26, 1991Date of Patent: June 23, 1992Assignee: Minnesota Mining and Manufacturing CompanyInventor: Richard M. Stern
-
Patent number: 5084488Abstract: Moldings, in particular foams and fibers, based on melamine/formaldehyde condensation products, in which from 0.1 to 70 mol% of the melamine have been replaced by melamine substituted by from 1 to 3 hydroxyoxaalkyl groups of the formula--(CH.sub.2 --CH.sub.2 --O).sub.n --CH.sub.2 --CH.sub.2 --OH (n=1-5)have increased elasticity.Type: GrantFiled: July 11, 1990Date of Patent: January 28, 1992Assignee: BASF AktiengesellschaftInventors: Juergen Weiser, Wolfgang Reuther, Gerhard Turznik, Wolfgang Fath, Heinz Berbner, Onno Graalmann
-
Patent number: 5077320Abstract: A process for producing polymer particles containing one microvoid or two or more discrete microvoids, which comprises(1) adding a base to a latex of a carboxyl-modified copolymer containing 0.1 to 1000 parts of an organic solvent per 100 parts by weight of the carboxyl-modified copolymer to neutralize at least part of the carboxyl groups in the copolymer, and(2) adding an acid to the latex to adjust the pH of the latex to not more than 7.Type: GrantFiled: June 22, 1990Date of Patent: December 31, 1991Assignee: Nippon Zeon Co., Ltd.Inventors: Hideki Touda, Yukio Takagishi
-
Patent number: 5041464Abstract: A process for preparing polymer emulsion particles having pores therein, an outside diameter D of 0.1 to 5.0[ , an inside diameter d of 0.05 to 4.0.mu. , and a ratio (d/D) of 0.1 to 0.9 in dry condition, comprising the steps of forming core-shell emulsion particles from specific monomers by two-emulsion polymerizations, and swelling the core of the particles with water by hydrolyzing the vinyl acetate part of polymer (A), thereby inducing the hydroxyl groups therein, e.g., using an acidic material or a basic material at 50.degree. to 100.degree. C. The particles when use as a pigment in coating compositions provide excellent converage rate, brightness, gloss and water resistance.Type: GrantFiled: December 26, 1989Date of Patent: August 20, 1991Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Futoshi Hoshino, Takeshi Yanagihara, Makoto Nakano
-
Patent number: 5026735Abstract: A method of treating hazardous material or other substrate with an aqueous air foam, comprising the steps of (1) preparing an aqueous solution or dispersion comprising (a) water-soluble polyhydroxy polymer having a plurality of hydrogen-bondable 1,2- and/or 1,3-diol structures capable of complexation with the borate anion, B(OH).sub.4.sup.Type: GrantFiled: June 12, 1990Date of Patent: June 25, 1991Assignee: Minnesota Mining and Manufacturing CompanyInventor: Richard M. Stern
-
Patent number: 4996240Abstract: Compositions and a process for manufacture are provided for synthetic polymer-propellant systems that form cohesive foamed structures from which aqueous solutions can be expressed, where the useful temperature range over which these structures form is broadened by using a propellant mixture consisting predominantly of a propellant that is a poor solvent for the polymer and has a vapor pressure in the range of 10-35 psig at 20.degree. C. in combustion with a small amount of a propellant that is a good solvent for the polymer; and where these coherent foamed structures can be formed even with aqueous solutions containing 0 to about 30% alcohol, provided that insoluble fine-particle solids that do not pack and become difficult to redisperse are included in the composition.Type: GrantFiled: August 8, 1988Date of Patent: February 26, 1991Inventors: Lloyd I. Osipow, Dorothea C. Marra, J. George Spitzer
-
Patent number: 4990373Abstract: An aqueous foamable membrane-forming composition comprised of a water dispersible polymeric latex, preferably styrene-butadiene latex, and an alkyl ether sulfate surface active agent. The composition desirably contains a alcohol having 12 to 14 carbon atoms, an acrylic acid polymer viscosity modifying agent and powdered carbon. Compositions of the invention in dilute aqueous form can be foamed and deposited on a surface to be covered, such as a landfill. Upon standing, the foam develops into a substantially stable, weather resistent membrane.Type: GrantFiled: September 29, 1989Date of Patent: February 5, 1991Assignee: Rusmar IncorporatedInventor: Paul A. Kittle
-
Patent number: 4973670Abstract: The present invention provides for a process for preparing hollow polymer latexes by a one stage emulsion polymerization. The first step invloves introducing an effective amount of a first charge of a organic phase to an aqueous phase. The first charge of the organic phase comprises monomer which is vertually insoluble in the aqeuous phase and an inert-nonpolymerizable hydrocarbon. The polymer formed from polymerizing the monomer is virtually insoluble in the hydrocarbon, the hydrocarbon is virtually insoluble in the aqueous phase and the monomer is miscible with the hydrocarbon. The monomer is polymerized to produce a low molecular weight polymer such that the low molecular weight polymer will phase separate from the organic phase and conentrates at the surface of the introduced organic phase forming a low molecular weight polymer phase.Type: GrantFiled: November 22, 1989Date of Patent: November 27, 1990Assignee: The Dow Chemical CompanyInventors: Charles J. McDonald, Yohannes Chonde, William E. Cohrs, Dalton C. MacWilliams
-
Patent number: 4960802Abstract: An aqueous compact composition comprising an aqueous adhesive copolymer emulsion, the adhesive composition having a durometer measured on the type A scale by ASTM D2240 of at least 20, and a blowing agent. The aqueous contact adhesive composition is applied as a coating to a surface of each of two substrates, then foamed, and substantially dried to provide a dry cellular adhesive coating. The adhesive-coated surfaces are then joined. The preferred contact adhesive composition comprises a vinyl acetate/ethylene/N-methylolacrylamide copolymer emulsion and contains colloidal silica.Type: GrantFiled: March 8, 1990Date of Patent: October 2, 1990Assignee: Air Products and Chemicals, Inc.Inventor: Frank V. DiStefano
-
Patent number: 4937023Abstract: The method of the kind, comprising: incorporating vulcanizing substances to natural rubber latex, leaving the mixture to react and vulcanize, filling a mask mold with the vulcanized product, pouring the product out of the mold when a product film of the desired thickness has adhered to the surface of the mold, and stripping the film off the mold. According to the invention, the method further comprises: centrifuging the vulcanized latex to remove the chemicals which have not been incorporated during the reaction; performing a foaming by mechanical or chemical means after the maceration step, and performing a drying after pouring the product out the mold, by heating to from 50.degree. to 90.degree. C. to facilitate stripping the mask off the mold.Type: GrantFiled: April 27, 1989Date of Patent: June 26, 1990Inventor: Alfredo B. Garcia
-
Patent number: 4935469Abstract: A process for producing monodispersed fine particles of a vinyl polymer is disclosed, which comprises polymerizing monomers containing at least one vinyl monomer selected from the group consisting of aromatic vinyl compounds, acrylic esters, and a methacrylic ester in the presence of (1) a surface active agent represented by formula (I) ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a substituted or unsubstituted alkyl group having from 4 to 8 carbon atoms, a substituted or unsubstituted phenyl group, or a substituted or unsubstituted cyclohexyl group and M represents an alkali metal, (2) from 10.sup.-3 to 10.sup.-1 mol/l of a persulfate as a polymerization initiator, and (3) from 10.sup.-4 to 10.sup.-2 mol/l of a divalent metal sulfate as an electrolyte. Monodispersed vinyl polymer fine particles having a particle size of 1 .mu.m or greater with a very narrow size distribution are obtained.Type: GrantFiled: February 3, 1988Date of Patent: June 19, 1990Assignee: Fuji Xerox Co., Ltd.Inventors: Yutaka Akasaki, Naoya Yabuuchi, Tatsuro Ohki
-
Patent number: 4923903Abstract: Air is mechanically entrained in a dyed or colored, aqueous solution comprising surfactant, poly(oxyalkylene) polyisocyanate prepolymer and the reaction product of said prepolymer and one or more isocyanate-reactive dyes, the poly(oxyalkylene) portion of said prepolymer containing sufficient oxyethylene units to render the prepolymer and the reaction product water-soluble and hydrophilic, to form a dyed or colored, fluid, aqueous air foam which is sprayed or otherwise applied to exposed surface of a substrate, e.g. a sanitary landfill, the applied foam gelling or increasing in viscosity, due to the polymerization, e.g.Type: GrantFiled: January 24, 1989Date of Patent: May 8, 1990Assignee: Minnesota Mining and Manufacturing CompanyInventors: Roger R. Alm, Richard M. Stern
-
Patent number: 4910229Abstract: A process for producing hollow polymer latex particles, which comprises(1) adding a base to a carboxyl-containing polymer latex obtained by emulsion polymerization of a monomeric mixture composed of at least 0.1% by weight of an ethylenically unsaturated carboxylic acid and another ethylenically unsaturated monomer copolymerization with the carboxylic acid to adjust the pH of the polymer latex to at least 7 and swell the polymer latex particles, and(2) adding an acid to the polymer latex formed in (1) to adjust the pH of the latex to not more than 7.Type: GrantFiled: March 28, 1989Date of Patent: March 20, 1990Assignee: Nippon Zeon Co., Ltd.Inventor: Masayoshi Okubo
-
Patent number: 4888134Abstract: A conductive foam having a surface resistance of not more than 9.9.times.10.sup.10 ohms as measured by DIN 53,345 may be prepared by incorporating into the base compound at least about 5 parts by dry weight per 100 parts by weight of polymer of a dispersion of carbon black stabilized by a soap predominantly of the same type as that compatible with the process used to set the foam; and processing the compound in a conventional manner.Type: GrantFiled: July 19, 1988Date of Patent: December 19, 1989Assignee: BASF AktiengesellschaftInventors: Jean-Pierre Kleitz, Piere H. A. Mertzeisen
-
Patent number: 4886702Abstract: The invention relates to a process for the preparation of a coagulated material by impregnating a textile cloth in an impregnating bath containing at least a coagulable polymer latex followed by coagulation in a coagulating bath.The process of the invention is characterized in that the coagulation is carried out from the water phase, whereas the impregnating bath contains a (chemical or physical) foaming agent, wherein foaming occurs simultaneously with the coagulation or immediately thereafter.It is surprisingly found that according to the present process a high quality coagulated material is obtained, which is comparable with the coagulated material, obtained according to conventional processes.Type: GrantFiled: January 21, 1988Date of Patent: December 12, 1989Inventors: Dirk P. Spek, Leonardus A. van der Heyden
-
Patent number: 4883832Abstract: Fluid polymer/polyol dispersions are prepared from novel polyether polyols.Type: GrantFiled: June 24, 1987Date of Patent: November 28, 1989Assignee: BP Chemicals LimitedInventors: Rudolpha C. Cloetens, Werner A. Lidy, Huy P. Thanh
-
Patent number: 4876290Abstract: Microcapsules, and especially suspensions of microencapsulated colorants well adapted for the manufacture of carbonless papers, are produced by emulsifying a hydrophobic organic fluid which includes an aliphatic diisocyanate and an isocyanurate ring trimer of an aliphatic diisocyanate, and optionally a dissolved organic material, in an essentially aqueous liquid containing a protective colloid, a surfactant, or both, wherein the weight ratio of aliphatic diisocyanate/trimer ranges from 0.05/l to 0.70/l and the surface tension between the aqueous phase and the hydrophobic organic phase ranges from 0 to 20 mN/m, and then forming microcapsules by interfacially reacting a polyamine with the emulsion which results, thereby constituting polyurea walls of said microcapsules by polyaddition.Type: GrantFiled: February 11, 1988Date of Patent: October 24, 1989Assignee: Rhone-Poulenc ChimieInventor: Gilbert Vivant
-
Patent number: 4804688Abstract: An aqueous slurry of gypsum plaster is stabilized by an organic, polymeric, hydrophilic stabilizer for more than 30 days without setting.Upon activation with a Lewis acid the slurry becomes hydrated. The plaster form or the hydrated form may be employed to impregnate a substrate to form insulating sheeting. The substrate may be fabric, felt, paper, nonwoven, or sponge.Open-cell, foamed gypsum may be used alone or molded to shaped articles such as bricks for a firewall.Type: GrantFiled: September 4, 1987Date of Patent: February 14, 1989Inventor: Neiko I. Vassileff
-
Patent number: 4781781Abstract: A solid flexible polymeric material is formed by solidifying a water-based latex which contains an inorganic filler. The filler is sand and this may be stabilized in the latex with xanthan gum. The solid material may be a foamed or non-foamed layer which may be used as integral carpet backing, as carpet underlay, or as an adhesive for bonding a reinforcing fabric to the back of carpeting.Type: GrantFiled: August 27, 1987Date of Patent: November 1, 1988Inventor: Gerald Hallworth
-
Patent number: 4725627Abstract: Disclosed is a sculpted, hand-squeezable toy which possesses dimensional memory and has a predetermined dimensional memory restoration time. The toy is made by blending a foamable hydrophilic polyurethane isocyanate-functional prepolymer, a vinyl or acylic polymer emulsion recovery rate modifier, water, and an organic cosolvent. The blend then is charged to a mold for the foamed toy to be made therein. The proportion of organic cosolvent present and the temperature of the blend being molded are variables for determining the predetermined dimensional memory restoration time of the toy after it has been squeezed.Type: GrantFiled: March 16, 1987Date of Patent: February 16, 1988Assignee: Signastone IncorporatedInventors: Sigurdur I. Arnason, Michael A. Kunke
-
Patent number: 4722945Abstract: A flame-retardant latex foam contains at least 35 (and preferably 40 to 55) parts by weight of an expandable graphite per hundred parts by weight of latex. Additional flame-retardant materials (e.g. hydrated aluminas, magnesium hydroxide, compounds of halogen and/or phosphorus, boron compounds, antimony oxides or melamine) can be included in the foam formulation, as can fillers or intumescent agents. The expandable graphite contains one or more exfoliating agents such that considerable expansion will occur at high temperatures. Foams according to the present invention satisfy the conditions of British Standard Specification Nos. 5852; Part 2; 1982 and 4735; 1974.Type: GrantFiled: May 4, 1987Date of Patent: February 2, 1988Assignee: Dunlop LimitedInventors: Kenneth Wood, Raymond W. H. Bell
-
Patent number: 4713263Abstract: Foamable, storage stable flocking adhesives are prepared from an aqueous emulsion prepared by the emulsion polymerization of a vinyl ester of an alkanoic acid interpolymerized with:(a) 5 to 30% by weight of ethylene;(b) 0.5 to 6% by weight of an N-methylol containing copolymerizable monomer;(c) 1 to 5% by weight of an olefinically unsaturated carboxylic acid;(d) 0.2 to 3% by weight of a latex stabilizer; and(e) 0 to 1% by weight of at least one polyunsaturated copolymerizable monomer.Type: GrantFiled: May 13, 1987Date of Patent: December 15, 1987Assignee: National Starch and Chemical CorporationInventors: David Lunsford, James L. Walker
-
Patent number: 4696951Abstract: Foamable, storage stable flocking adhesives are prepared from an aqueous emulsion prepared by the emulsion polymerization of a vinyl ester of an alkanoic acid interpolymerized with:(a) 5 to 30% by weight of ethylene;(b) 0.5 to 6% by weight of an N-methylol containing copolymerizable monomer;(c) 1 to 5% by weight of an olefinically unsaturated carboxylic acid;(d) 0.2 to 3% by weight of a latex stabilizer; and(e) 0 to 1% by weight of at least one polyunsaturated copolymerizable monomer.Type: GrantFiled: May 12, 1986Date of Patent: September 29, 1987Assignee: National Starch and Chemical CorporationInventors: David Lunsford, James L. Walker
-
Patent number: 4692473Abstract: A foam polyvinyl product prepared from a composition comprising a vinyl polymer and an alkali carbonate foaming agent.Type: GrantFiled: April 26, 1985Date of Patent: September 8, 1987Assignee: Orin Chemical CompanyInventors: Thomas C. Wright, Grover L. Johnson
-
Patent number: 4690953Abstract: A method of mechanically frothing and casting an aqueous ionic polyurethane dispersion to yield a mechanically frothed polyurethane foam. The method comprises admixing an aqueous ionic polyurethane dispersion with a stearate stabilizer and an optional aziridine crosslinking agent, and frothing the low viscosity admixture. The polyurethane dispersion contains particles having an average size of less than one micron, and contains between 35 and 70 percent by weight dispersed polyurethane solids. Preferably, each polyurethane particle in the aqueous dispersion is crosslinked. Before frothing, the low viscosity admixture contains between 33 and 87 percent by weight of the polyurethane dispersion, up to 33 percent by weight of an azirdine composition and between 13 and 50 percent by weight of a 33 percent aqueous dispersion of a stearate salt and has, as a result, a viscosity in the range of 100 to 200 centipoise. After frothing, the frothed admixture is knife-coated and cured into a flexible foam sheet.Type: GrantFiled: March 11, 1986Date of Patent: September 1, 1987Assignee: Seton CompanyInventors: Robert B. Orr, Leon Chicosky, Jr.
-
Patent number: 4684668Abstract: An improved process is provided for producing porous PVC resin particles by a thickened aqueous suspension polymerization process comprising polymerizing vinyl chloride monomer in an aqueous suspension wherein said aqueous medium contains at least one dispersant capable of thickening water, and optionally at least one secondary surfactant, at least one oil-soluble free radical generating catalyst, the improvement comprising charging said free radical catalyst as a solution wherein the solvent for said catalyst solution has a density equal to or less than that of the monomer being polymerized and the catalyst solution has a density less than water.Type: GrantFiled: February 6, 1987Date of Patent: August 4, 1987Assignee: The B. F. Goodrich CompanyInventor: Roman B. Hawrylko
-
Patent number: 4647618Abstract: This invention describes a method of producing a silicone elastomer from an emulsion. When the ingredients are mixed together, the resulting latex can be used immediately. Removing the water from the latex results in a silicone elastomer. The method combines (A) an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, present as an emulsion of dispersed particles in water, the emulsion having a pH of greater than 9, (B) dialkyltindicarboxylate, (C) alkylorthosilicate, (D) colloidal silica, and optionally (E) water, admixing (A) and (B) only in the presence of (C) to produce a dispersion of the ingredients in water. The ingredients can be distributed into a two-part system for storage. One embodiment includes fibers, lauryl alcohol, or a mixture of both in the emulsion; then forms an open-cell, elastomeric foam by forming a froth from the emulsion and removing the water from the froth.Type: GrantFiled: February 18, 1986Date of Patent: March 3, 1987Assignee: Dow Corning CorporationInventors: Therese M. Bauman, Alan L. Freiberg
-
Patent number: 4634733Abstract: This invention describes a method of producing a silicone elastomer from an emulsion. When the ingredients are mixed together, the resulting latex can be used immediately. Removing the water from the latex results in a silicone elastomer. The method combines (A) an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, present as an emulsion of dispersed particles in water, the emulsion having a pH of greater than 9, (B) dialkyltindicarboxylate, (C) alkylorthosilicate, (D) colloidal silica, and optionally (E) water, admixing (A) and (B) only in the presence of (C) to produce a dispersion of the ingredients in water. The ingredients can be distributed into a two-part system for storage. One embodiment includes fibers, lauryl alcohol, or a mixture of both in the emulsion; then forms an open-cell, elastomeric foam by forming a froth from the emulsion and removing the water from the froth.Type: GrantFiled: May 28, 1986Date of Patent: January 6, 1987Assignee: Dow Corning CorporationInventors: Therese M. Bauman, Alan L. Freiberg
-
Patent number: 4631296Abstract: This invention describes a method of producing a silicone elastomer from an emulsion. When the ingredients are mixed together, the resulting latex can be used immediately. Removing the water from the latex results in a silicone elastomer. The method combines (A) an anionically stabilized, hydroxyl endblocked polydiorganosiloxane, present as an emulsion of dispersed particles in water, the emulsion having a pH of greater than 9, (B) dialkyltindicarboxylate, (C) alkylorthosilicate, (D) colloidal silica, and optionally (E) water, admixing (A) and (B) only in the presence of (C) to produce a dispersion of the ingredients in water. The ingredients can be distributed into a two-part system for storage. One embodiment includes fibers, lauryl alcohol, or a mixture of both in the emulsion; then forms an open-cell, elastomeric foam by forming a froth from the emulsion and removing the water from the froth.Type: GrantFiled: May 28, 1986Date of Patent: December 23, 1986Assignee: Dow Corning CorporationInventors: Therese M. Bauman, Alan L. Freiberg
-
Patent number: 4613630Abstract: This invention relates to a method of producing silicone elastomeric foam of low density. The method mixes polydiorganosiloxanes having hydroxyl endblocking or vinyl endblocking or mixtures of both along with water to react with silicon hydride in the presence of platinum catalyst to release hydrogen gas to create a froth which cures to a foam. The combination of ingredients allows the manufacture of silicone foam having different combinations of properties than those obtained from previous methods. Embodiments of the invention also make use of specific profoamers and specific alcohols to further modify the properties of the foams produced. The method of this invention yields a low cost, low density, silicone elastomeric foam having physical properties which enable it to be used in cushioning and sealing applications.Type: GrantFiled: March 3, 1986Date of Patent: September 23, 1986Assignee: Dow Corning CorporationInventors: Therese M. Bauman, John E. Dietlein