Solid Polymer Derived From Reactant Containing Nitrogen Atom Other Than From (meth)acrylonitrile Patents (Class 525/217)
  • Patent number: 4698373
    Abstract: Compositions hardenable by exposure to heat or electromagnetic radiation are provided by dissolving together to form a blend from about 0% to about 50% by weight of an uncrosslinked polymer, from about 2% to about 30% of a polymerizable monomer, from about 10% to about 70% of a crosslinked polymer in the form of discrete particles having average diameters of from 0.001 micron to about 500 microns and being swollen in said solution and from about 20% to about 70% of a crosslinking agent for said monomer. Such compositions exhibit superior chemical and physical characteristics when hardened and are suitable in a wide variety of applications as construction media. Such compositions are especially suitable in the production of prosthetic dental appliances, such as, for example, prosthetic teeth. It is believed that the hardening of such compositions as, for example, during the preparation of dental appliances forms a polymer system known as an interpenetrating polymer network.
    Type: Grant
    Filed: April 30, 1984
    Date of Patent: October 6, 1987
    Assignee: Dentsply Research & Development Corp.
    Inventors: Louis Tateosian, Frederick D. Roemer
  • Patent number: 4690995
    Abstract: Copolymers comprising 0.10 to 50 parts by weight of hindered phenol antioxidant monomer and at least 10 to 60 parts by weight of at least one unsaturated carboxylic acid monomer are prepared, preferably in emulsion polymerization systems.
    Type: Grant
    Filed: June 6, 1985
    Date of Patent: September 1, 1987
    Assignee: The Dow Chemical Company
    Inventors: William H. Keskey, Mark R. Johnson
  • Patent number: 4675362
    Abstract: A multi-component copolymer rubber consisting essentially of (A) 20 to 69.5% by weight of a cyano-substituted alkyl (meth)acrylate, (B) 30 to 79.5% by weight of an alkyl acrylate, (C) 0.5 to 10% by weight of a crosslinkable monomer and (D) 0 to 10% by weight of other ethylenically unsaturated monomer copolymerizable with (A), (B) and (C), excels in heat resistance, ozone resistance, sour gasoline resistance and sour gasohol resistance. There properties of said multi-component copolymer rubber can further be improved by incorporating into the copolymer rubber a crosslinking agent, a metal salt, a vinylidene fluoride polymer, a vinyl chloride resin or other multi-component copolymer rubber.
    Type: Grant
    Filed: April 3, 1986
    Date of Patent: June 23, 1987
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Toshio Miyabayashi, Nobuyuki Sakabe, Yoshiyuki Udagawa, Hiroji Enyo, Yasuhiko Takemura
  • Patent number: 4668731
    Abstract: Dispersion of polyacrylic acid in mineral spirits containing an elastomer that is swellable in mineral spirits, amount of elastomer being sufficient to render the dispersion less resistant to settling of solids.
    Type: Grant
    Filed: August 5, 1985
    Date of Patent: May 26, 1987
    Assignee: The B. F. Goodrich Company
    Inventors: Robert Y. Lochhead, Thomas R. George, Jr., William L. Banks
  • Patent number: 4625005
    Abstract: A multi-component copolymer rubber consisting essentially of (A) 20 to 69.5% by weight of a cyano-substituted alkyl (meth)acrylate, (B) 30 to 79.5% by weight of an alkyl acrylate, (C) 0.5 to 10% by weight of a crosslinkable monomer and (D) 0 to 10% by weight of other ethylenically unsaturated monomer copolymerizable with (A), (B) and (C), excels in heat resistance, ozone resistance, sour gasoline resistance and sour gasohol resistance. These properties of said multi-component copolymer rubber can further be improved by incorporating into the copolymer rubber a crosslinking agent, a metal salt, a vinylidene fluoride polymer, a vinyl chloride resin or other multi-component copolymer rubber.
    Type: Grant
    Filed: March 26, 1985
    Date of Patent: November 25, 1986
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Toshio Miyabayashi, Nobuyuki Sakabe, Yoshiyuki Udagawa, Hiroji Enyo, Yasuhiko Takemura
  • Patent number: 4594378
    Abstract: Polymeric compositions are described which comprise a mixture of(A) at least one oil-soluble polymer which is a homopolymer of a non-aromatic monoolefin or a copolymer of said non-aromatic monoolefin with an aromatic monoolefin, and(B-1) at least one nitrogen-containing ester of a carboxy-containing interpolymer, and/or(B-2) at least one oil-soluble acrylate polymerization product of at least one acrylate ester, or a mixture of one or more of (B-1) and (B-2). The polymeric compositions of the invention also may contain(C) an effective amount of at least one viscosity-reducing liquid organic diluent such as a naphthenic oil or an alkylated aromatic material.
    Type: Grant
    Filed: March 25, 1985
    Date of Patent: June 10, 1986
    Assignee: The Lubrizol Corporation
    Inventors: Craig D. Tipton, Kent B. Grover
  • Patent number: 4571418
    Abstract: The char residue formation of molded compositions, upon combustion, is improved by incorporating into the moldable composition a char-forming polymer containing recurring units of at least one monomer capable of undergoing tautomerization, at least one monomer capable of undergoing a nucleophilic substitution reaction by said monomer capable of undergoing tautomerization and, optionally, at least one additional copolymerizable monomer.
    Type: Grant
    Filed: March 12, 1984
    Date of Patent: February 18, 1986
    Assignee: Atlantic Richfield Company
    Inventor: Usama E. Younes
  • Patent number: 4556614
    Abstract: A method of producing a solid electrolyte for an electrochemical cell, the cell comprising at least one first complexing polymer presenting in its monomer pattern at least one heteroatom and at least one ionizable alkaline salt complexed in the said polymer, wherein said complexing polymer is mixed with at least one second polymer miscible with the said complexing polymer and having cross-linkable functions; said cross-linkable functions then being physically cross-linked, with the complexing polymer being brought to an essentially amorphous state during said cross-linking operation.The electrolyte obtained can be used in electrochemical cells operating at ambient temperature.
    Type: Grant
    Filed: November 4, 1982
    Date of Patent: December 3, 1985
    Assignee: Compagnie Generale d'Electricite
    Inventors: Alain le Mehaute, Thierry Hamaide, Gilles Crepy, Georges Marcellin
  • Patent number: 4552921
    Abstract: A process for the production of a nonaqueous stable emulsion feedstock comprising a rubber, a block copolymer having at least one component miscible with the rubber and at least one component miscible with the monomer, and at least two unsaturated organic monomers capable of free radical polymerization is disclosed. At least one of the monomers must be miscible with the rubber and the mixture of the monomers is substantially a nonsolvent for the rubber. The block copolymer maintains the rubber or rubber-rich particles in emulsified form within the mixture of monomers. In general, the process comprises (1) mixing the rubber, block copolymer and at least a portion of the rubber miscible monomers to form a first nonaqueous solution, (2) mixing the remaining monomers and the remaining portion of the rubber miscible monomers to form a second solution, and (3) combining the two solutions to form the nonaqueous stable emulsion feedstock.
    Type: Grant
    Filed: February 25, 1985
    Date of Patent: November 12, 1985
    Assignee: The Standard Oil Company
    Inventors: Wen B. Shyu, David A. Woodhead, Vincent P. Quigley
  • Patent number: 4539373
    Abstract: Novel thermoplastic polyelectrolyte complexes are disclosed which are the reaction products of (a) a polyanion and (b) a polycation wherein one of the polyanion and polycation contains repeating units derived from a soft monomer. By the selection of said soft monomers and of the cation group present in the polycation, moldable, extrudable polyelectrolyte complexes are obtained.
    Type: Grant
    Filed: July 12, 1982
    Date of Patent: September 3, 1985
    Assignee: The Dow Chemical Company
    Inventors: Inder Mani, Glen L. Gunderman
  • Patent number: 4537831
    Abstract: The binder composition for nonwoven products comprising a vinyl chloride-ethylene copolymer emulsion and up to 25 wt %, based on emulsion solids, of a polyamine containing 5 or 6 member N-heterocyclic moieties prepared by the polymerization of at least one diallylamine of the formula ##STR1## where R is hydrogen or a C.sub.1 -C.sub.4 alkyl group and R' is hydrogen or a methyl group.
    Type: Grant
    Filed: February 22, 1984
    Date of Patent: August 27, 1985
    Assignee: Air Products and Chemicals, Inc.
    Inventor: Frank V. Di Stefano
  • Patent number: 4497923
    Abstract: The present invention relates to a process for the viscosification of an organic liquid which comprises the steps of forming a first solution of an anionic polymer dissolved in the organic liquid; forming a second solution of a cationic polymer dissolved in the organic liquid; and mixing the first and the second solutions together to form an interpolymer complex of the anionic and cationic polymer in the organic liquid, wherein the organic liquid containing the interpolymer complex has improved viscosification properties. This solution possesses higher viscosity than the mean of the separate viscosities of the starting solutions at relatively low solids content. Moreover, these interpolymer complexes, in hydrocarbon solutions, can be formulated to exhibit shear thickening at increased shear rates. This property is useful in such technological applications as antimisting of the solvent.
    Type: Grant
    Filed: November 2, 1983
    Date of Patent: February 5, 1985
    Assignee: Exxon Research & Engineering Co.
    Inventors: Robert D. Lundberg, Dennis G. Peiffer, Ilan Duvdevani, Robert R. Phillips
  • Patent number: 4495243
    Abstract: A release agent comprising (A) a polymer of at least one vinyl monomer of the general formulaCH.sub.2 .dbd.CR.sub.1 COO(CH.sub.2 CHR.sub.2 O).sub.n CONHR (I)wherein R.sub.1 and R.sub.2, independently from each other, represent hydrogen or a methyl group, R represents an alkyl group having at least 12 carbon atoms or a fluoroalkyl group having at least 6 carbon atoms, and n is an integer of from 1 to 6,(B) a copolymer of at least one vinyl monomer of general formula (I) above and another compound copolymerizable therewith, or a mixture of said polymer (A) and said copolymer (B); and a product prepared by coating the said release agent on a non-adhesive surface of an adhesive article having an adhesive surface and the non-adhesive surface or on the surface of a release paper.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: January 22, 1985
    Assignee: Sekisui Kagaku Kogyo Kabushiki Kaisha
    Inventor: Takaji Kishi
  • Patent number: 4490494
    Abstract: Improved dyeability of alpha-monoolefin polymers is obtained by incorporating in the olefin polymer a polymeric dye receptor and a small amount of a carboxylic acid metal salt.
    Type: Grant
    Filed: December 15, 1983
    Date of Patent: December 25, 1984
    Assignee: Phillips Petroleum Company
    Inventor: Robin D. Shropshire
  • Patent number: 4482609
    Abstract: A coating composition used as a sealer coat in the repair of auto and truck finishes which contains as the film forming binder an iminated acrylic polymer, a polyester resin and an ethylene vinyl acetate copolymer and optionally contains ultraviolet light stabilizers.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: November 13, 1984
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Michael E. Woodhouse
  • Patent number: 4467072
    Abstract: A water soluble addition copolymer is formed by reaction admixing a monomer having a pendant vinyl group attached to at least one ring structure selected from the group consisting of nitrogen containing heterocyclic ring structures and aromatic ring structures and their mixtures, and a monomer selected from the group consisting of maleic anhydride, fumaronitrile, tetracyanoethylene, maleimide and their mixtures, where such addition copolymer can be used alone, as curable a insulating coating composition, or can be added to a resin, to form a curable resinous insulating coating composition.
    Type: Grant
    Filed: May 3, 1982
    Date of Patent: August 21, 1984
    Assignee: Westinghouse Electric Corp.
    Inventor: James D. B. Smith
  • Patent number: 4454304
    Abstract: The method of producing a rubber compound having high green strength comprising providing separate rubber components one of which contains a tertiary amine component bound therein and the other of which contains a halogen cross linking agent bound therein, and blending the two rubber components to form a rubber blend having high green strength.
    Type: Grant
    Filed: April 22, 1981
    Date of Patent: June 12, 1984
    Assignee: Copolymer Rubber & Chemical Corp.
    Inventor: Tom C. H. Tsai
  • Patent number: 4447580
    Abstract: A resin composition comprising (A) a polymer having, in the molecule, at least two groups represented by the following structural formula (I): ##STR1## wherein R.sub.1 is isopropyl, sec-butyl, tert-butyl, a C.sub.5-20 alkyl group, a C.sub.3-20 cycloalkyl group, a C.sub.5-20 alkenyl group, a C.sub.3-20 hydroxyalkyl group, a C.sub.5-20 alkoxyalkyl group, a C.sub.3-20 aminoalkyl group, a C.sub.6-20 aryl group or a C.sub.6-20 arylalkyl group, and n is 0, 1 or 2, and (B) a polymer having an electron attractive group and an .alpha.,.beta.-ethylenic double bond adjacent thereto. Though said composition is stable at room temperature, it is crosslinked and cured at high temperatures because the amino group of the polymer (A) adds to the double bond of the polymer (B). Accordingly, said resin composition is suitable for use as a cathodic electrocoating material.
    Type: Grant
    Filed: November 12, 1981
    Date of Patent: May 8, 1984
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Hideo Ai, Naohiro Tsuruta
  • Patent number: 4443576
    Abstract: Novel polymeric compositions useful as thickeners and rheology modifiers for oil-in-water emulsion systems are disclosed. The water-soluble or swellable compositions described contain, prior to polymerization, from:______________________________________ 10-70% Acrylamide or methacrylamide; 20-70% Acrylic acid, methacrylic acid, or their water-soluble salts; 5-50% Of a hydroxyalkylacrylate; 0-10% Of a polyfunctional monomeric branching material; and, 0-15% Low molecular weight water-soluble copolymer of a non-ionic or anionic water-soluble vinyl addition monomer and lower alkylacrylate. ______________________________________Optionally a water-soluble polymer dispersant may be added to the composition after polymerization.
    Type: Grant
    Filed: March 29, 1982
    Date of Patent: April 17, 1984
    Assignee: Nalco Chemical Company
    Inventors: Bhupati R. Bhattacharyya, Manuel Slovinsky, Raymond J. Wachala, Lawrence E. Beske, Michael L. McCullar
  • Patent number: 4378457
    Abstract: Cyanacrylic acid ester based glues with a reduced setting time comprising a cyanacrylic acid ester and from 0.005% to 3% by weight, based on the cyanacrylic acid ester of a polyoxyalkylene glycol diester having the formula ##STR1## wherein x is an integer from 5 to 80, Alk is an alkylene having from 2 to 4 carbon atoms, and R.sub.1 and R.sub.2 represent members selected from the group consisting of hydroxyl, halogen, lower alkoxy, alkoxyalkyl having from 3 to 12 carbon atoms, alkyl having from 1 to 12 carbon atoms, cyanoalkyl having from 1 to 12 carbon atoms, haloalkyl having from 1 to 12 carbon atoms, nitroalkyl having from 1 to 12 carbon atoms, alkenyl having from 2 to 12 carbon atoms, alkynyl having from 2 to 12 carbon atoms, cycloalkyl having from 3 to 12 carbon atoms, phenyl, nitrophenyl, halophenyl, phenylalkyl having from 1 to 6 carbon atoms in the alkyl and alkylphenyl having from 1 to 6 carbon atoms in the alkyl.
    Type: Grant
    Filed: December 9, 1981
    Date of Patent: March 29, 1983
    Assignee: Henkel Kommanditgesellschaft Auf Aktien
    Inventors: Werner Gruber, Hans-Athanas Bruhn
  • Patent number: 4357435
    Abstract: Polymers of esters of methacrylic acid having an average chain length of about 6 to about 50 mers are prepared by an anionic polymerization reaction, carried out in the presence of a chain-regulating alcohol and a catalytic amount of an alkoxide anion, in which control of the molecular weight and molecular weight distribution of the polymer are achieved by regulating the ratio of the total quantity of alcohol employed to the total monomer charge. These polymers, their hydrolysis products, and their derivatives have a wide variety of applications, including use as components in films, coatings, fibers, impregnants, adhesives, printing inks, and binders, and use as modifiers, plasticizers, melt flow improvers, and leveling agents.
    Type: Grant
    Filed: September 29, 1977
    Date of Patent: November 2, 1982
    Assignee: Rohm and Haas Company
    Inventors: Sheldon N. Lewis, Richard A. Haggard
  • Patent number: 4347339
    Abstract: Water soluble cationic block copolymer comprising at least one first polymer block selected from a first class consisting of polymeric species having amino groups in the polymeric structure thereof wherein a majority of said amino groups are quaternary, and at least one second polymer block selected from a second class consisting of polymer species having amino groups in the polymeric structure thereof wherein a majority of said amino groups are other than quaternary amino acids. Also included are the methods of making these copolymers.
    Type: Grant
    Filed: May 8, 1981
    Date of Patent: August 31, 1982
    Assignee: Nalco Chemical Company
    Inventors: Jan E. Boevink, Arthur P. Derrick, John A. Moodie
  • Patent number: 4339373
    Abstract: Polymeric soaps prepared from copolymers of hydrophobic monomers and hydrophilic monomers are useful as granulation and/or drying aids for polymeric gels, especially those gels of polyacrylamide.
    Type: Grant
    Filed: February 6, 1980
    Date of Patent: July 13, 1982
    Assignee: American Cyanamid Company
    Inventor: Peter M. Robinson
  • Patent number: 4338235
    Abstract: A cationic electrocoating composition containing a polyhydroxyamine and acrylic or methacrylic polymers and optionally a crosslinker resin.
    Type: Grant
    Filed: December 29, 1980
    Date of Patent: July 6, 1982
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Isidor Hazan
  • Patent number: 4299748
    Abstract: An aqueous coating composition in the form of an aqueous dispersion of acrylic copolymer prepared by polymerizing a mixture of acrylic monomers in an aqueous medium containing an electroconductive copolymer. The composition forms coatings having both heat sealing properties and antistatic properties and also possessing transparency, anti-blocking properties, slipping properties and resistance to weather and to water.
    Type: Grant
    Filed: December 14, 1978
    Date of Patent: November 10, 1981
    Assignee: Daicel Ltd.
    Inventors: Yoshio Hashizume, Masanori Itoh, Yasumasa Sakai, Akiyosi Kamita
  • Patent number: 4284551
    Abstract: Tertiary aromatic amines derived from para-aminophenethanol act as accelerators for the peroxide catalyzed polymerization of vinyl monomers, especially methacrylates and acrylates, and for the curing of unsaturated polyesters. The amines are characterized by generally high reactivity and low toxicity, and by their yielding polymers of high strength and low color, and are thereby particularly suited for use in polymerizable or curable formulations employed in the filling and restoration of human teeth, in the preparation of cold-curing denture base materials for fabricating or repairing dentures and in the cementing of bone.
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: August 18, 1981
    Assignee: American Dental Association Health Foundation
    Inventor: Harold Argentar
  • Patent number: 4281080
    Abstract: Age resistant resin which comprises a composition selected from (A) a composition having a softening point in the range of 0.degree. C. to about 140.degree. C. comprising units derived from selected aliphatic diolefins and aliphatic monoolefins, which can be modified with units derived from dicyclopentadiene, and certain vinyl aromatic compounds, and selected phenol or amine type compounds and (B) a composition having a softening point in the range of about 60.degree. C. to about 110.degree. C. comprising units derived from monoolefins and vinyl aromatic compounds, which can be modified with aliphatic diolefins, and selected phenol and amine type compounds. Such age resistant resins have particular utility when admixed with various rubbery materials and thermoplastics to create pressure sensitive adhesives and hot melt adhesives.
    Type: Grant
    Filed: February 17, 1977
    Date of Patent: July 28, 1981
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Herbert L. Bullard, Robert A. Osborn
  • Patent number: 4271282
    Abstract: A process for producing carbo-chain homopolymers, block- and random copolymers of conjugated dienes and vinylaromatic monomers comprising polymerization of dienes, vinyl- or di-vinylaromatic monomers or copolymerization thereof in a medium of a hydrocarbon solvent at a temperature ranging from -30.degree. to +150.degree. C. in the presence of an organolithium catalyst of the formula R(Li).sub.x, wherein R is a hydrocarbon radical or a diene polymer, x is an integer of from 1 to 4, and a modifying additive which is a compound comprising a product of interaction between a phenolamine resin and an alkali metal and having the general formula: ##STR1## wherein n is an integer of from 1 to 10;M is sodium or potassium;R is an alkyl with 2 to 20 carbon atoms or an arylalkyl with 7 to 20 carbon atoms;R.sub.1 is an alkyl with 1 to 6 carbon atoms, an arylalkyl with 7 to 9 carbon atoms or hydrogen;this modifying additive is used in an amount of from 0.07 to 2.0 g/equiv. per one g/equiv. of active lithium.
    Type: Grant
    Filed: August 22, 1979
    Date of Patent: June 2, 1981
    Inventors: Viktor P. Judin, Valentin P. Shatalov, Leonid V. Kovtunenko, Valeria G. Shalganova, Nadezhda K. Kashkina, Lidia N. Mistjukova, Neonila M. Semenova, Zinaida N. Korbanova, Ivan P. Mitin, Vladimir V. Moiseev, Vladimir V. Kosovtsev
  • Patent number: 4267282
    Abstract: In the process of melting a blend of nitrile polymer and lubricous additive with a screw-plasticizing unit, the improvement which involves having an absorptive anti-slip agent such as rubber crumb in admixture with the blend when charging the plasticator to minimize feeding problems.
    Type: Grant
    Filed: September 18, 1978
    Date of Patent: May 12, 1981
    Assignee: Monsanto Company
    Inventor: Edward F. Tokas
  • Patent number: 4259460
    Abstract: Improved rubbery compositions comprise vinyl chloride polymers, butadiene-acrylonitrile polymers and butadiene-styrene-tertiary amine polymers. Such compositions may be compounded and vulcanized and the vulcanizates may be used in hoses, rolls and gaskets.
    Type: Grant
    Filed: December 5, 1979
    Date of Patent: March 31, 1981
    Assignee: Polysar Limited
    Inventor: Herbert F. Schwarz
  • Patent number: 4248753
    Abstract: Resinous compositions which are the Michael adducts of primary and/or secondary amines and polymers containing alpha, beta-ethylenically unsaturated moieties in conjugation with carbonyl moieties are disclosed. The compositions are depositable on substrates to form films. The films are amenable to oxidative and aminoplast cures and cure with light color. The compositions are desirable for use in cationic electrodeposition.
    Type: Grant
    Filed: August 28, 1978
    Date of Patent: February 3, 1981
    Assignee: PPG Industries, Inc.
    Inventors: Stephen L. Buchwalter, Joseph F. Bosso, Roger M. Christenson
  • Patent number: 4225476
    Abstract: Adhesive blend of wood rosin and a thermoplastic graft copolymer prepared by heating for about 15 seconds to 60 minutes, with mixing, a trunk copolymer of at least two monomers, at least one of said monomers providing amine-reactive sites taken from the group consisting of the anhydride group, e.g., maleic anhydride; a vicinal pair of carboxylic groups and a carboxylic acid adjacent to an alkoxycarbonyl group, wherein the alkoxy group contains up to 20 carbon atoms, and at least one of said monomers containing no amine-reactive sites, and at least one side chain polymer having per chain one active amine site taken from the group consisting of primary and secondary amines, the remainder of said side chain polymer being substantially unreactive with the reactive sites, e.g., amino-substituted polycaprolactam, polylaurolactam, polyethylene oxide, etc., of the trunk copolymer.
    Type: Grant
    Filed: May 14, 1976
    Date of Patent: September 30, 1980
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Clarence F. Hammer, Harold K. Sinclair
  • Patent number: 4222906
    Abstract: An improved method is provided for processing of rubbers in which one of the rubbers is a synthetic green strength polymer, the improvement being the addition of the synthetic green strength polymer at the second stage of mixing rather than at the prior art first stage. The method can be used for preparing rubber compounds whenever a synthetic green strength polymer is used as one component of the rubber compound.
    Type: Grant
    Filed: April 27, 1978
    Date of Patent: September 16, 1980
    Assignee: Polysar Limited
    Inventors: George J. Briggs, Yung-Kang Wei
  • Patent number: 4205143
    Abstract: Certain mixtures of polyanionic and polycationic polymers are effective inhibitors of magnesium hydroxide scale formation in evaporative desalination units.
    Type: Grant
    Filed: November 13, 1978
    Date of Patent: May 27, 1980
    Assignee: American Cyanamid Company
    Inventor: Richard M. Goodman
  • Patent number: 4194999
    Abstract: A powdery rubber is produced by mixing an anionic or nonionic rubber latex with an aqueous solution of an anionic water soluble macro-molecular compound which is dissociated in water to give negative charge; adjusting the pH to an acidic condition; adding to the aqueous solution either a cationic polymer which is water soluble in an acidic condition or a cationic surfactant which causes a coacervation with the anionic water soluble macromolecular compound in an acidic condition to separate the rubber particles from the rubber latex under coacervation and adding an emulsion of a synthetic resin having a glass transition temperature higher than 30.degree. C. to the rubber particles at a ratio of 1 to 50 wt.% (as a solid content) to the solid content of the rubber latex and dehydrating and drying the resulting powdery rubber.
    Type: Grant
    Filed: November 7, 1977
    Date of Patent: March 25, 1980
    Assignee: Toyo Soda Manufacturing Company, Ltd.
    Inventors: Takao Hayashi, Yasuhiro Sakanaka, Akihiko Shimizu
  • Patent number: 4167610
    Abstract: Ion exchange resins of the poly(allylamine) type which comprise an aralkyl radical or a saturated aliphatic radical, and which may be made by reacting an allylamine type polymer with an organic dihalo compound so as to crosslink it.
    Type: Grant
    Filed: November 21, 1977
    Date of Patent: September 11, 1979
    Assignee: ICI Australia Limited
    Inventors: Brian A. Bolto, Kurt H. Eppinger
  • Patent number: RE31022
    Abstract: Resinous compositions which are the Michael adducts of primary and/or secondary amines and polymers containing alpha, beta-ethylenically unsaturated moieties in conjugation with carbonyl moieties are disclosed. The compositions are depositable on substrates to form films. The films are amenable to oxidative and aminoplast cures and cure with light color. The compositions are desirable for use in cationic electrodeposition.
    Type: Grant
    Filed: March 26, 1981
    Date of Patent: August 31, 1982
    Assignee: PPG Industries, Inc.
    Inventors: Stephen L. Buchwalter, Joseph F. Bosso, Roger M. Christenson