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)
  • Patent number: 5494939
    Abstract: 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: Grant
    Filed: January 10, 1994
    Date of Patent: February 27, 1996
    Assignees: A. H. Hides, Skins Australia Pty Ltd.
    Inventors: Efim S. Vainerman, Irina B. Portnaya
  • Patent number: 5494940
    Abstract: 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: Grant
    Filed: March 8, 1993
    Date of Patent: February 27, 1996
    Assignee: AlliedSignal Inc.
    Inventors: Peter D. Unger, Ronald P. Rohrbach
  • Patent number: 5470887
    Abstract: 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: Grant
    Filed: April 25, 1994
    Date of Patent: November 28, 1995
    Assignee: Imperial Chemical Industries, PLC
    Inventors: Neil Perrins, Mary E. Kelly
  • Patent number: 5451454
    Abstract: 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: Grant
    Filed: December 14, 1992
    Date of Patent: September 19, 1995
    Assignee: Bridgestone Corporation
    Inventors: Yoshihide Fukahori, Naruhiko Mashita, Akihiko Ogino, Shinichi Toyosawa, Takeshi Ohba, Yasushi Imai
  • Patent number: 5446072
    Abstract: 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: Grant
    Filed: November 14, 1994
    Date of Patent: August 29, 1995
    Assignee: Sumitomo Chemical Co., Ltd.
    Inventors: Tatsuo Mitsutake, Shizuo Narisawa
  • Patent number: 5434192
    Abstract: 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: Grant
    Filed: February 2, 1993
    Date of Patent: July 18, 1995
    Assignee: Atlantic Richfield Company
    Inventors: Sophany Thach, Kenneth C. Miller, Karen S. Schultz
  • Patent number: 5430070
    Abstract: 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: Grant
    Filed: December 16, 1994
    Date of Patent: July 4, 1995
    Assignee: Ryusuke Kono
    Inventor: Ryusuke Kono
  • Patent number: 5384337
    Abstract: 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: Grant
    Filed: February 5, 1993
    Date of Patent: January 24, 1995
    Inventor: William D. Budinger
  • Patent number: 5360826
    Abstract: 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: Grant
    Filed: February 16, 1994
    Date of Patent: November 1, 1994
    Assignee: Rohm and Haas Company
    Inventors: Scott L. Egolf, Reginald T. Smart
  • Patent number: 5338766
    Abstract: 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: Grant
    Filed: March 26, 1993
    Date of Patent: August 16, 1994
    Assignee: The Procter & Gamble Company
    Inventors: Dean V. Phan, Paul D. Trokhan
  • Patent number: 5334655
    Abstract: 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: Grant
    Filed: December 9, 1993
    Date of Patent: August 2, 1994
    Assignee: Rohm and Haas Company
    Inventors: Virginia A. Carlson, Maria E. Curry-Nkansah, Matthew S. Gebhard, Rosemarie P. Lauer
  • Patent number: 5332763
    Abstract: 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: Grant
    Filed: July 10, 1992
    Date of Patent: July 26, 1994
    Assignee: Miles Inc.
    Inventor: Mark A. Koshute
  • Patent number: 5331016
    Abstract: 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: Grant
    Filed: October 18, 1993
    Date of Patent: July 19, 1994
    Assignee: Schock & Co., GmbH
    Inventors: Lothar Frank, deceased, Gunter Hieber
  • Patent number: 5328936
    Abstract: 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: Grant
    Filed: February 1, 1993
    Date of Patent: July 12, 1994
    Assignee: Rohm and Haas Company
    Inventors: Paul J. Leifholtz, Thomas E. Meteyer
  • Patent number: 5254599
    Abstract: 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: Grant
    Filed: February 12, 1992
    Date of Patent: October 19, 1993
    Assignee: Schock & Co. GmbH
    Inventor: Lothar Frank, deceased
  • Patent number: 5252622
    Abstract: 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: Grant
    Filed: November 12, 1991
    Date of Patent: October 12, 1993
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Frank V. DiStefano
  • Patent number: 5252621
    Abstract: 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: Grant
    Filed: July 1, 1991
    Date of Patent: October 12, 1993
    Assignee: Tioxide Group Services Limited
    Inventor: John C. W. Hodge
  • Patent number: 5180753
    Abstract: 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: Grant
    Filed: October 30, 1990
    Date of Patent: January 19, 1993
    Inventors: Lloyd I. Osipow, Dorothea C. Marra, J. George Spitzer
  • Patent number: 5162487
    Abstract: 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: Grant
    Filed: August 13, 1991
    Date of Patent: November 10, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Juergen Weiser, Wolfgang Reuther, Gerhard Turznik, Wolfgang Fath, Heinz Berbner, Onno Graalmann
  • Patent number: 5159046
    Abstract: 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: Grant
    Filed: June 26, 1990
    Date of Patent: October 27, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Gerhard Grogler, Andreas Ruckes, Richard Kopp, Heinrich Hess, Robert Eiben, James M. Barnes
  • Patent number: 5124363
    Abstract: 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: Grant
    Filed: March 26, 1991
    Date of Patent: June 23, 1992
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard M. Stern
  • Patent number: 5084488
    Abstract: 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: Grant
    Filed: July 11, 1990
    Date of Patent: January 28, 1992
    Assignee: BASF Aktiengesellschaft
    Inventors: Juergen Weiser, Wolfgang Reuther, Gerhard Turznik, Wolfgang Fath, Heinz Berbner, Onno Graalmann
  • Patent number: 5077320
    Abstract: 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: Grant
    Filed: June 22, 1990
    Date of Patent: December 31, 1991
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Hideki Touda, Yukio Takagishi
  • Patent number: 5041464
    Abstract: 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: Grant
    Filed: December 26, 1989
    Date of Patent: August 20, 1991
    Assignee: Mitsui Toatsu Chemicals, Incorporated
    Inventors: Futoshi Hoshino, Takeshi Yanagihara, Makoto Nakano
  • Patent number: 5026735
    Abstract: 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: Grant
    Filed: June 12, 1990
    Date of Patent: June 25, 1991
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: Richard M. Stern
  • Patent number: 4996240
    Abstract: 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: Grant
    Filed: August 8, 1988
    Date of Patent: February 26, 1991
    Inventors: Lloyd I. Osipow, Dorothea C. Marra, J. George Spitzer
  • Patent number: 4990373
    Abstract: 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: Grant
    Filed: September 29, 1989
    Date of Patent: February 5, 1991
    Assignee: Rusmar Incorporated
    Inventor: Paul A. Kittle
  • Patent number: 4973670
    Abstract: 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: Grant
    Filed: November 22, 1989
    Date of Patent: November 27, 1990
    Assignee: The Dow Chemical Company
    Inventors: Charles J. McDonald, Yohannes Chonde, William E. Cohrs, Dalton C. MacWilliams
  • Patent number: 4960802
    Abstract: 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: Grant
    Filed: March 8, 1990
    Date of Patent: October 2, 1990
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Frank V. DiStefano
  • Patent number: 4937023
    Abstract: 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: Grant
    Filed: April 27, 1989
    Date of Patent: June 26, 1990
    Inventor: Alfredo B. Garcia
  • Patent number: 4935469
    Abstract: 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: Grant
    Filed: February 3, 1988
    Date of Patent: June 19, 1990
    Assignee: Fuji Xerox Co., Ltd.
    Inventors: Yutaka Akasaki, Naoya Yabuuchi, Tatsuro Ohki
  • Patent number: 4923903
    Abstract: 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: Grant
    Filed: January 24, 1989
    Date of Patent: May 8, 1990
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Roger R. Alm, Richard M. Stern
  • Patent number: 4910229
    Abstract: 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: Grant
    Filed: March 28, 1989
    Date of Patent: March 20, 1990
    Assignee: Nippon Zeon Co., Ltd.
    Inventor: Masayoshi Okubo
  • Patent number: 4888134
    Abstract: 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: Grant
    Filed: July 19, 1988
    Date of Patent: December 19, 1989
    Assignee: BASF Aktiengesellschaft
    Inventors: Jean-Pierre Kleitz, Piere H. A. Mertzeisen
  • Patent number: 4886702
    Abstract: 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: Grant
    Filed: January 21, 1988
    Date of Patent: December 12, 1989
    Inventors: Dirk P. Spek, Leonardus A. van der Heyden
  • Patent number: 4883832
    Abstract: Fluid polymer/polyol dispersions are prepared from novel polyether polyols.
    Type: Grant
    Filed: June 24, 1987
    Date of Patent: November 28, 1989
    Assignee: BP Chemicals Limited
    Inventors: Rudolpha C. Cloetens, Werner A. Lidy, Huy P. Thanh
  • Patent number: 4876290
    Abstract: 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: Grant
    Filed: February 11, 1988
    Date of Patent: October 24, 1989
    Assignee: Rhone-Poulenc Chimie
    Inventor: Gilbert Vivant
  • Patent number: 4804688
    Abstract: 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: Grant
    Filed: September 4, 1987
    Date of Patent: February 14, 1989
    Inventor: Neiko I. Vassileff
  • Patent number: 4781781
    Abstract: 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: Grant
    Filed: August 27, 1987
    Date of Patent: November 1, 1988
    Inventor: Gerald Hallworth
  • Patent number: 4725627
    Abstract: 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: Grant
    Filed: March 16, 1987
    Date of Patent: February 16, 1988
    Assignee: Signastone Incorporated
    Inventors: Sigurdur I. Arnason, Michael A. Kunke
  • Patent number: 4722945
    Abstract: 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: Grant
    Filed: May 4, 1987
    Date of Patent: February 2, 1988
    Assignee: Dunlop Limited
    Inventors: Kenneth Wood, Raymond W. H. Bell
  • Patent number: 4713263
    Abstract: 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: Grant
    Filed: May 13, 1987
    Date of Patent: December 15, 1987
    Assignee: National Starch and Chemical Corporation
    Inventors: David Lunsford, James L. Walker
  • Patent number: 4696951
    Abstract: 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: Grant
    Filed: May 12, 1986
    Date of Patent: September 29, 1987
    Assignee: National Starch and Chemical Corporation
    Inventors: David Lunsford, James L. Walker
  • Patent number: 4692473
    Abstract: A foam polyvinyl product prepared from a composition comprising a vinyl polymer and an alkali carbonate foaming agent.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: September 8, 1987
    Assignee: Orin Chemical Company
    Inventors: Thomas C. Wright, Grover L. Johnson
  • Patent number: 4690953
    Abstract: 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: Grant
    Filed: March 11, 1986
    Date of Patent: September 1, 1987
    Assignee: Seton Company
    Inventors: Robert B. Orr, Leon Chicosky, Jr.
  • Patent number: 4684668
    Abstract: 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: Grant
    Filed: February 6, 1987
    Date of Patent: August 4, 1987
    Assignee: The B. F. Goodrich Company
    Inventor: Roman B. Hawrylko
  • Patent number: 4647618
    Abstract: 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: Grant
    Filed: February 18, 1986
    Date of Patent: March 3, 1987
    Assignee: Dow Corning Corporation
    Inventors: Therese M. Bauman, Alan L. Freiberg
  • Patent number: 4634733
    Abstract: 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: Grant
    Filed: May 28, 1986
    Date of Patent: January 6, 1987
    Assignee: Dow Corning Corporation
    Inventors: Therese M. Bauman, Alan L. Freiberg
  • Patent number: 4631296
    Abstract: 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: Grant
    Filed: May 28, 1986
    Date of Patent: December 23, 1986
    Assignee: Dow Corning Corporation
    Inventors: Therese M. Bauman, Alan L. Freiberg
  • Patent number: 4613630
    Abstract: 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: Grant
    Filed: March 3, 1986
    Date of Patent: September 23, 1986
    Assignee: Dow Corning Corporation
    Inventors: Therese M. Bauman, John E. Dietlein