Specified Material Contains A Phosphorus Atom Patents (Class 525/255)
  • Patent number: 5929169
    Abstract: This invention provides curable fluoroelastomer compositions comprising: (a) a fluorine-containing polymer or blend of fluorine-containing polymers each comprising interpolymerized units derived from one or more fluorine-containing ethylenically unsaturated monomers; (b) at least one organo-onium compound such as those selected from the group consisting of ammonium, arsonium, phosphonium, stibonium, amino-phosphonium, phosphorane (e.g. triarylphosphorane), iminium, and sulfonium compounds; and (c) one or more aryl, allyl or alkyl carbonate-blocked compounds as crosslinking agents. Methods of curing fluoroelastomer compositions, and articles made therefrom are also described.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: July 27, 1999
    Assignee: Dyneon LLC
    Inventors: Naiyong Jing, Robert E. Kolb
  • Patent number: 5902838
    Abstract: Cationically curable adhesives and sealants with increased viscosities and improved rheological control and good storage stability are prepared using a cationically curable monomer and a thickening polymer which is the alkylation reaction product of poly(4-hydroxystyrene) or poly(2-hydroxystyrene) with a compound RX where R is allyl, methallyl, crotyl or prenyl and X is Cl, Br or I. The cationically curable monomer suitably includes at least one alkenyloxystyrene monomer. Such thickened adhesives are useful as edge sealants for flat panel display devices. A-stage curing of the adhesive with UV irradiation allows for near ambient temperature fixturing of the device assemblies and B-stage thermal curing of the adhesive can be conducted at much lower temperatures than are needed for glass frit sealants. The B-stage cured products have thermal resistance, outgassing and substrate adhesion properties adequate for flat panel display devices.
    Type: Grant
    Filed: October 1, 1996
    Date of Patent: May 11, 1999
    Assignee: Loctite Corporation
    Inventors: John G. Woods, Maria L. Masterson, Matthew P. Burdzy, Bernard M. Malofsky
  • Patent number: 5837776
    Abstract: Aqueous dispersions of water soluble nonionic and anionically charged vinyl and allyl addition polymers can be obtained by polymerizing in the presence of an anionically charged water soluble polymer stabilizer in a saturated salt solution. Methods for the preparation of these polymers, and their compositions are disclosed.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: November 17, 1998
    Assignee: Nalco Chemical Company
    Inventors: Radhakrishnan Selvarajan, John R. Hurlock
  • Patent number: 5728773
    Abstract: This invention provides curable fluoroelastomer compositions comprising: (a) a fluorine-containing polymer or blend of fluorine-containing polymers each comprising interpolymerized units derived from one or more fluorine-containing ethylenically unsaturated monomers; (b) at least one organo-onium compound such as those selected from the group consisting of ammonium, arsonium, phosphonium, stibonium, amino-phosphonium, phosphorane (e.g. triarylphosphorane), iminium, and sulfonium compounds; and (c) one or more aryl, allyl or alkyl carbonate-blocked compound as a crosslinking agents. Methods of curing fluoroelastomer compositions, and articles made therefrom are also described.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: March 17, 1998
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Naiyong Jing, Robert E. Kolb
  • Patent number: 5726245
    Abstract: Highly transparent, impact-resistant molding compositions based on polymethyl methacrylate (PMMA), having excellent color stability both during processing at high temperatures, as well as when under thermal stress, as a result of multiple processing with simultaneously high weathering stability and stability of the optical characteristics with the effect of water. Preparation is carried out according to a multi-step extruder process, wherein an extruder for the melt coagulation and one for the compounding are connected in series. Addition of small quantities of reducing inorganic phosphorous compounds at a later stage provides prolonged effectiveness.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: March 10, 1998
    Assignee: Roehm GmbH Chemische Fabrik
    Inventors: Uwe Numrich, Michael Wicker, Thomas Rhein, Thomas Suefke
  • Patent number: 5658663
    Abstract: A vinylidene fluoride resin fiber have a diameter of not less than 0.5 mm, and satisfy the formulae (1) and (2):Ra.gtoreq.0.5 (1)Rb.gtoreq.(Ra+Rc)/3.0 (2)wherein Rc represents a ratio of absorbance at 765 cm.sup.-1 of .alpha.-type crystal to that at 843 cm.sup.-1 of .beta.-type crystal at the center point of a fiber cross-section, Rb represents a ratio of absorbance at 765 cm.sup.-1 of .alpha.-type crystal to that at 843 cm.sup.-1 of .beta.-type crystal at the point of r/3 from the center point thereof, and Ra represents a ratio of absorbance at 765 cm.sup.-1 of .alpha.-type crystal to that at 843 cm.sup.-1 of .beta.-type crystal at the point of 2r/3 from the center point thereof, wherein r is a radius of the fiber cross-section.
    Type: Grant
    Filed: November 27, 1995
    Date of Patent: August 19, 1997
    Assignee: Kureha Kagaku Kogyo Kabushiki Kaisha
    Inventors: Toshiya Mizuno, Seiichi Ohira, Mitsuru Itoh, Kazuyuki Munakata, Satoshi Hashimoto
  • Patent number: 5610248
    Abstract: The present invention concerns a novel method for preparing polymers (preferably (meth)acrylate polymers and copolymers) having a narrow molecular weight distribution by metal-free anionic polymerization in the presence of a phosphonium cation. The present invention also concerns block copolymers and methods of making the same using anionic polymerization in the presence of a phosphonium cation to prepare at least one block of the copolymer.
    Type: Grant
    Filed: March 6, 1995
    Date of Patent: March 11, 1997
    Assignee: The University of Southern California
    Inventors: Thieo Hogen-Esch, Angela Zagala
  • Patent number: 5565525
    Abstract: A resin composition curable through a Michael reaction between (a) a component having a plurality of .alpha., .beta.-unsaturated carbonyl groups and (b) a component having a plurality of activated methylene, activated methyne or hydroxyl groups is disclosed. The curing reaction is catalyzed with a quaternary ammonium, quaternary phosphonium or tertiary sulfonium salt in the presence of an epoxy compound independently added to the composition or covalently attacted to either component (a) or component (b).
    Type: Grant
    Filed: October 26, 1994
    Date of Patent: October 15, 1996
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Hideo Morimoto, Kei Aoki, Takashi Irie, Hiroto Yoneda
  • Patent number: 5530070
    Abstract: A graft copolymer dispersant (binder) having a weight average molecular weight of about 5,000-100,000 wherein: (1) the graft copolymer has a polymeric backbone formed by polymerizing ethylenically unsaturated monomers; (2) the graft copolymer has macromonomer side chains attached to the backbone at a single terminal point that have weight average molecular weights of about 1,000-30,000 and are formed from by polymerizing ethylenically unsaturated monomers in the presence of a cobalt chain transfer agent. The graft copolymer further contains about 2 to 70% by weight, based on the weight of the graft copolymer, of polymerized constituents having a phosphate moiety or phosphoric acid moleties that are polymerized into the backbone, the side chains, or both. The graft copolymer is neutralized with an inorganic base or an amine.
    Type: Grant
    Filed: August 25, 1995
    Date of Patent: June 25, 1996
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: Joseph A. Antonelli, Lee A. E. Becton, Brian P. Devlin, Christopher Scopazzi
  • Patent number: 5521252
    Abstract: Acrylic multilayer polymer powders containing coagulated powders of emulsified latexes of acrylic multilayer polymers, which are suitable for drying methods using pressure dehydration extruders, etc, comprises not more than 40 wt % of a fine powder of a particle size of 212 .mu.m or less after drying, and have a volume of gaps of a pore size of 5 .mu.m or less after drying of not more than 0.7 cc per unit weight as measured by a mercurial pressure method. A desired monomer is subjected to emulsion polymerization to produce an emulsified latex of an acrylic multilayer polymer, which is then poured into a coagulating solution for coagulation.
    Type: Grant
    Filed: February 17, 1995
    Date of Patent: May 28, 1996
    Assignee: Mitsubishi Rayon Company Ltd.
    Inventors: Kaoru Matsuda, Hirofumi Uno, Akihiro Toritani, Jun Nakauchi
  • Patent number: 5446093
    Abstract: A process is disclosed for producing six-armed and eight-armed asymmetric radial block copolymers. The process comprises anionically polymerizing a diene and/or a vinyl aromatic hydrocarbon to create living polydiene and/or vinyl aromatic hydrocarbon arms, sequentially anionically polymerizing a vinyl aromatic hydrocarbon and a diene to create living block copolymer arms and coupling the two sets of arms together in one step with a coupling agent that will couple six or eight arms, wherein the molar ratio of the vinyl aromatic hydrocarbon-diene arms to the polydiene arms is sufficient to produce a statistical blend with less than 5 weight percent homopolydiene.
    Type: Grant
    Filed: November 10, 1993
    Date of Patent: August 29, 1995
    Assignee: Shell Oil Company
    Inventors: Ronald J. Hoxmeier, Bridget A. Spence, Steven S. Chin, Michael A. Masse
  • Patent number: 5314958
    Abstract: Process for preparing a graft copolymer having a high graft copolymer fraction which comprises subjecting a monomer to a polymerization initiation condition resulting from the reaction of a halogen-containing polymer with a combination of a reducing agent and a phase transfer catalyst such as an onium compound thereby to polymerize said monomer.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: May 24, 1994
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventor: Shunichi Himori
  • Patent number: 5300578
    Abstract: A method for preparing a polyolefine--vinyl polymer composite, wherein about 10-200 parts by weight of vinyl monomer and about 0.01-4.0 parts by weight of a free radical polymerization initiator, based on 100 parts by weight of vinyl monomer, are impregnated in 100 parts of weight of polyolefine particles by slowly mixing these at a temperature of about 20.degree.-130.degree. C. while maintaining the particle structure of the polyolefine. After 50-99% of the amount of the monomer has been absorbed into the polyolefine particles, a water suspension is prepared by adding to the above-mentioned mixture about 80-1000 parts by weight water, based on 100 parts of weight of polyolefine+vinyl monomer, as well as a stabilizing agent. The temperature of the water suspension is then increased for polymerizing the vinyl monomer.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: April 5, 1994
    Assignee: Neste Oy
    Inventors: Torvald Vestberg, Ismo Lehtiniemi
  • Patent number: 5268429
    Abstract: An improved process for the production of linear block copolymers of vinylaromatic hydrocarbon and conjugated alkadiene comprises the coupling of living polymer chains containing at least one block of polymerized vinylaromatic hydrocarbon and at least one block of polymerized conjugated alkadiene wherein the coupling agent is an aromatic phosphonite.
    Type: Grant
    Filed: May 28, 1992
    Date of Patent: December 7, 1993
    Assignee: Shell Oil Company
    Inventors: Margaretha J. C. M. Koppes, Johannes A. Van Doorn, Judith J. B. Walhof
  • Patent number: 5250629
    Abstract: There is provided a process for producing a styrenic graft copolymer which comprises coplymerizing a styrenic monomer and a styrenic monomer having a hydrocarbon radical with an unsaturated bond in the presence of a catalyst comprising as primary ingredient (A) a transition metal compound and (B) a contact product of an organoaluminum compound and a condensation agent or (C) a compound which produces an ionic complex by reacting with the above-mentioned transition metal compound and subsequently graft polymerizing an ethylenically unsaturated monomer onto the resultant styrenic copolymer.The above-described styrenic graft copolymer is greatly improved in terms of compatibility, adhesivity, coatability and wettability while preserving heat resistance and chemical resistance thereof, and thus effective as a variety of constructional materials and compatibilizing agents.
    Type: Grant
    Filed: December 6, 1991
    Date of Patent: October 5, 1993
    Assignee: Idemitsu Kosan Co., Ltd.
    Inventors: Noriyuki Tani, Shuji Machida, Toshinori Tazaki
  • Patent number: 5218026
    Abstract: A fluorine-containing elastomer composition comprising a specific fluorine-containing elastomer having iodine bonded thereto and having a multimodel molecular weight distribution, a specific vulcanizing agent, an organic peroxide, and a polyfunctional unsaturated compound. The fluorine-containing elastomer composition has not only excellent processability, mold release properties and burr-removal performance in molding but also capability of providing a vulcanization product which is not only improved with respect to mechanical properties, but also has extremely excellent resistance to chemicals and solvents, particularly methanol, and good metal-adhesion properties.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: June 8, 1993
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Keiichi Toda, Kenichi Hayashi, Hiroshi Saito
  • Patent number: 5203884
    Abstract: An abrasive article (i.e., a coated abrasive article or a three-dimensional, low density abrasive article) having a sufficient amount of vanadium oxide incorporated therein to provide having a reduced tendency to buildup static electricity during the abrading of a workpiece. Preferably, the abrasive article further comprises a compatible binder (preferably, a sulfonated polymer) to aid in securing the vanadium oxide to the abrasive article. In another aspect, a method of making the same is taught.
    Type: Grant
    Filed: June 4, 1992
    Date of Patent: April 20, 1993
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Scott J. Buchanan, Eric D. Morrison, David R. Boston, Steven T. Hedrick, William L. Kausch, Wayne K. Larson
  • Patent number: 5177148
    Abstract: Covulcanizable compositions comprising (A) 55-100% by weight of an elastomeric copolymer of vinylidene fluoride with perfluoropropene optionally tetrafluoroethylene and containing from 0.001 to 2% by weight of bromine; (B) 0-45% by weight of a tetrafluoroethylene and propylene copolymer; (C) 0.7-2.5 parts for 100 parts of mix (A)+(B) of a bisphenol compound; (D) 0.3-1.5 parts for 100 parts of mix (A)+(B) of an organic guaternary compound of ammonium, phosphonium or aminophosphonium; (E) 0.4-5 parts for 100 parts of mix (A)+(B) of an organic peroxide; (F) 1-5% by weight of (A)+(B) of a peroxide cross-linking coagent.
    Type: Grant
    Filed: August 23, 1990
    Date of Patent: January 5, 1993
    Assignee: Ausimont S.p.A.
    Inventors: Vincenzo Arcella, Giulio Tommasi, Giulio Brinati, Gianna Cirillo, Fabio Costanzi
  • Patent number: 5135997
    Abstract: This invention relates to a process for the radical homo-or copolymerization of acrylonitrile with one or more copolymerizable monomers under reaction conditions such that the monomers are present predominantly in a gaseous form of an adsorbed form and polymerization of the monomers, which are presumably adsorbed, takes place in the solid phase (solvent-free polymerization) and results in pulverulent PAN-(co)polymers. The process is preferably carried out in the presence of small quantities of a mediator substance such as dimethylformamide which does not alter the pulverulent consistency of the PAN-polymers but leads considerably more rapidly and with much improved yields to freshly formed polyacrylonitrile polymers.
    Type: Grant
    Filed: September 14, 1990
    Date of Patent: August 4, 1992
    Assignee: Bayer Aktiengesellschaft
    Inventors: Karl-Heinz Feltgen, Rudiger Franck, Konrad Hable, Siegfried Korte, Manfred Heckenbach
  • Patent number: 5106916
    Abstract: This invention relates to a process for the catalytic grafting of an ethylenically unsaturated monomer onto a copolymer in the presence of a catalyst. The monomer is selected from the group consisting of ethylenically unsaturated carboxylic acids, anhydrides esters and other derivatives thereof. The copolymer is selected from the group consisting of certain copolymers of ethylene and ionomers of such copolymers. The catalyst is a mixture of (a) a certain amount of water and (b) at least one of certain phosphorus-containing compounds. The process comprises admixing copolymer, monomer, catalyst and an organic peroxide at a temperature above the melting point of the copolymer for a period of time so as to obtain a uniform distribution of monomer, catalyst and peroxide in the copolymer. The resultant grafted copolymer has improved color, and is useful in adhesive systems and as a compatibilizer for polymers and other materials.
    Type: Grant
    Filed: October 16, 1989
    Date of Patent: April 21, 1992
    Assignee: Du Pont Canada Inc.
    Inventor: David J. Mitchell
  • Patent number: 5045593
    Abstract: Organophilic polymer adducts which are effective fluid loss control additives for oil base well-working fluids are prepared from an anionic or cationic water soluble polymer and one or more phosphatides. Preferred phosphatides are phosphoglycerides obtained from vegetable oils, most preferably commercial lecithin. Preferred polymers comprise polysaccharides or derivatives thereof and synthetic polymers.
    Type: Grant
    Filed: July 2, 1990
    Date of Patent: September 3, 1991
    Assignee: Venture Chemicals, Inc.
    Inventors: Jack C. Cowan, Roy F. House, Victor M. Granquist
  • Patent number: 4978722
    Abstract: A method for producing a propylene-.alpha.-olefin block copolymer, which comprises polymerizing propylene in the presence of a catalyst and then polymerizing in a gas phase an .alpha.-olefin other than propylene, or propylene and other .alpha.-olefin without deactivating the catalyst, wherein at least one compound selected from the group consisting of an aromatic carboxylic acid ester, a phosphorous ester, an unsaturated dicarboxylic acid diester, an amine compound and an amide compound, is supplied to the latter gas phase polymerization system.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: December 18, 1990
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Nobuaki Goko, Yumito Uehara, Hideshige Kato, Yukimasa Matsuda
  • Patent number: 4946899
    Abstract: Block copolymers compose a polyisobutylene rubbery soft segment of M.sub.n of about 5,000 to above 500,000 and glassy hard segments of M.sub.n of about 5,000 or higher and usually about 10,000 to 35,000 or more, are made by preparing a living polymer block of the polyisobutylene and then polymerizing on said living polyisobutylene block the glassy hard segments by adding thereto an electron donor having a donor number of 15 to 50 and then adding and polymerizing the monomers for the glassy hard segments. The monomers for the glassy hard segments are styrene and its derivatives and indene and its derivatives and mixtures thereof.
    Type: Grant
    Filed: December 16, 1988
    Date of Patent: August 7, 1990
    Assignee: The University of Akron
    Inventors: Joseph P. Kennedy, Judit E. Puskas, Gabor Kaszas, William G. Hager
  • Patent number: 4908155
    Abstract: A surface-active block copolymer which comprises chemically linked polymeric blocks (A) and (B), block (A) of said copolymer consisting of at least one homo- or copolymerized non-polar alpha,beta-ethylenically unsaturated monomer and block (B) of said copolymer is derived by polymerizing an alpha-beta ethylenically unsaturated monomer containing an epoxy group and transforming the epoxy group into an hydroxy-substituted ionic group, preferably an anionic group. These block copolymers are used as dispersing agents in aqueous dispersions, including polymeric latex dispersions, and as plasticizing agent in hydrophilic colloid layers, including colloid layers containing a dispersed light-sensitive silver halide emulsion or other auxiliary substances for photographic materials.
    Type: Grant
    Filed: November 13, 1987
    Date of Patent: March 13, 1990
    Assignee: Agfa-Gevaert, N.V.
    Inventors: Luc E. Leemans, Herman J. Uytterhoeven, Philippe J. Teyssie, Roger M. Fayt, Nikolaas C. de Jaeger
  • Patent number: 4845156
    Abstract: Macromonomer prepared by contacting and reacting a polymer (oligomer) having at least three monomer repeat units and at least one silyl ether group, in the presence of an anion catalyst, with a terminally unsaturated acyl fluoride or sulfonyl fluoride.
    Type: Grant
    Filed: December 21, 1987
    Date of Patent: July 4, 1989
    Assignee: E. I. Du Pont De Nemours and Company
    Inventor: Gordon M. Cohen
  • Patent number: 4822871
    Abstract: A linear alternating polymer of carbon monoxide and at least one ethylenically unsaturated hydrocarbon exhibits improved thermal stability as evidenced by reduced weight loss at elevated temperatures and enhanced crystallinity and crystallizability when produced with a catalyst composition formed from preformed palladium trifluoroacetate and a bidentate phosphine ligand.
    Type: Grant
    Filed: December 18, 1987
    Date of Patent: April 18, 1989
    Assignee: Shell Oil Company
    Inventor: G. Bruce Klingensmith
  • Patent number: 4708994
    Abstract: This invention describes the preparation of reactive engineering thermoplastics containing arylcyclobutene groups pendant to an aromatic ring. The polymers are prepared by alkylation or acylation of an engineering thermoplastic which contains one or more aromatic groups capable of being alkylated or acylated with a suitable arylcyclobutene alkylating or acylating agent. The prepared reactive engineering thermoplastics containing pendant arylcyclobutene groups may be cross-linked and cured by heating above about 200.degree. C.
    Type: Grant
    Filed: June 30, 1986
    Date of Patent: November 24, 1987
    Assignee: Shell Oil Company
    Inventor: Pui K. Wong
  • Patent number: 4657983
    Abstract: Radiation curable copolymers useful in coating compositions are prepared by reacting part of the glycidyl groups of a glycidyl acrylate copolymer with acrylic or methacrylic acid followed by esterifying the remaining glycidyl groups with phosphoric acid.
    Type: Grant
    Filed: December 5, 1984
    Date of Patent: April 14, 1987
    Assignee: Interez, Inc.
    Inventor: Ronald J. Skiscim
  • Patent number: 4596857
    Abstract: A two part type acrylic adhesive composed of liquid I comprising an acrylate ester monomer, a polymer soluble in the acrylate ester monomer, and an organic peroxide and liquid II containing a hardening accelerator capable of hardening said liquid I by polymerization at a temperature lower than room temperature, wherein at least liquid I contains 0.005 to 0.1% by weight polyphosphoric acid.
    Type: Grant
    Filed: November 19, 1984
    Date of Patent: June 24, 1986
    Assignee: Okura Kogyo Kabushiki Kaisha
    Inventors: Hidemi Doi, Hideaki Matsuda
  • Patent number: 4533689
    Abstract: A flame resistant acrylic resin composition comprising a polymer composed of from 40 to 88% by weight of methyl methacrylate, from 1 to 15% by weight of .alpha.-methyl styrene, from 5 to 15% by weight of styrene, from 5 to 15% by weight of maleic anhydride and from 1 to 15% by weight of methacrylic acid, and a flame retardant.
    Type: Grant
    Filed: August 17, 1983
    Date of Patent: August 6, 1985
    Assignee: Mitsubishi Rayon Company, Limited
    Inventors: Suehiro Tayama, Norihisa Kusakawa
  • Patent number: 4506056
    Abstract: A process for the preparation of carboxyl-containing polymers comprising mixing together maleic anhydride, a free radical initiator, an additive which inhibits the homopolymerization of maleic anhydride but not that of methyl methacrylate below about 100.degree. C. and a polymer, above its melting point, in the absence of a solvent. The process yields anhydride-containing polymers without the substantial crosslinking or degradation which characterize the process in the absence of the additive.
    Type: Grant
    Filed: June 18, 1982
    Date of Patent: March 19, 1985
    Assignee: Gaylord Research Institute Inc.
    Inventor: Norman G. Gaylord
  • Patent number: 4452944
    Abstract: Novel structural adhesives for bonding metals and plastics are disclosed. The adhesives, comprising a solution or dispersion of a polymeric material, a monomer which is copolymerizable with such polymeric material and phosphorous-containing compounds are characterized by improved performance at elevated temperatures and excellent resistance to thermal degradation.
    Type: Grant
    Filed: February 11, 1982
    Date of Patent: June 5, 1984
    Assignee: Lord Corporation
    Inventor: Terrance H. Dawdy
  • Patent number: 4446270
    Abstract: A composition comprising elastomeric copolymer gum of vinylidene fluoride and at least one terminally unsaturated monolefin comonomer and as a vulcanizing agent therefor a composition comprising one or a mixture of aromatic compounds having hydroxyl and oxyallyl groups directly bonded to aromatic ring-carbon atoms.
    Type: Grant
    Filed: August 8, 1983
    Date of Patent: May 1, 1984
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Richard A. Guenthner, David A. Stivers
  • Patent number: 4433108
    Abstract: A process for the preparation of styrene homopolymers or copolymers by suspension polymerization of monomers which contain dissolved styrene polymers from a preceding suspension polymerization, in the presence of sparingly soluble metal phosphates as suspension stabilizers, wherein, before the polymerization is started, the monomer phase is dispersed in an aqueous phase, containing a dissolved mineral acid, preferably phosphoric acid, at from 10.degree. to 80.degree. C. for from 5 to 120 minutes, after which the sparingly soluble metal phosphate is formed in situ in the aqueous phase. The process is particularly suitable for the preparation of expandable styrene polymers, in which case a volatile blowing agent is added to the suspension before, during or after polymerization.
    Type: Grant
    Filed: June 4, 1982
    Date of Patent: February 21, 1984
    Assignee: BASF Aktiengesellschaft
    Inventor: Hans G. Keppler
  • Patent number: 4385156
    Abstract: Styrenic polymer expandable beads that are useful in forming heat-resistant foamed articles are prepared by forming an aqueous suspension of initial styrenic polymer beads and adding thereto a portion of a comonomer solution of styrenic monomer and methacrylic acid, which solution also contains a polymerization regulator, forming an emulsion of catalyst, monomer solution and polyvinyl alcohol suspending agent, adding portions of the emulsion to the suspension and then adding the remainder of the comonomer solution to the suspension, and the suspension with added monomers is heated to copolymerize the styrenic monomer and methacrylic acid about the initial beads and form a coating about the beads.
    Type: Grant
    Filed: April 1, 1982
    Date of Patent: May 24, 1983
    Assignee: Atlantic Richfield Company
    Inventors: Alvin R. Ingram, Harold A. Wright, Walter O. Pillar, Adolph V. DiGiulio, Kenneth D. Thom
  • Patent number: 4293665
    Abstract: Novel structural adhesive systems for metal-bonding applications. The adhesives, comprising a solution or dispersion of a polymeric material in a monomer copolymerizable therewith having incorporated therein certain phosphorus-containing compounds, are characterized by an unexpected ability of providing strong adhesion to untreated metal surfaces without adversely affecting adhesive performance, including resistance to deleterious environments. The environmental resistance of the herein described adhesives can be further improved by the addition of one or more polybasic lead salts, metal molybdates and metal phosphates.
    Type: Grant
    Filed: January 11, 1980
    Date of Patent: October 6, 1981
    Assignee: Lord Corporation
    Inventors: Denis J. Zalucha, Frederick H. Sexsmith, Ernest C. Hornaman, Terrance H. Dawdy
  • Patent number: 4292414
    Abstract: A process for preparing a modified block copolymer by graft-reacting at least one maleic acid compound with an aromatic vinyl compound/conjugated diene compound block copolymer containing at least one polymer block mainly composed of a conjugated diene compound and at least one polymer block mainly composed of an aromatic vinyl compound, the aromatic vinyl compound/conjugated diene compound weight ratio being within the range of 5/95 to 97/3, characterized in that said graft-reaction is carried out under conditions wherein the generation of radicals can be substantially inhibited. According to this process, it is possible to prevent gelation of the product in the graft-reaction, and the modified block copolymer obtained has excellent appearance characteristics, mechanical properties, and transparency.
    Type: Grant
    Filed: October 29, 1979
    Date of Patent: September 29, 1981
    Assignee: Asahi Kasei Kogyo Kabushiki Kaisha
    Inventors: Akira Saito, Akio Yamori, Toshio Ibaragi
  • Patent number: 4241191
    Abstract: Styrene polymers are prepared by suspension polymerization using, as suspension stabilizers, mixtures of(A) a sparingly soluble inorganic metal compound and(B) a fine polymer dispersion.The styrene polymers may be used, together with blowing agents, for the manufacture of foams.
    Type: Grant
    Filed: November 24, 1978
    Date of Patent: December 23, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Hans G. Keppler, Erhard Stahnecker, Rolf Moeller
  • Patent number: 4230832
    Abstract: Impact modified polyvinyl chloride is prepared by suspension polymerizing vinyl chloride in the presence of a dual catalyst system of a monomer soluble catalyst and a water soluble catalyst to form suspension polymer particles having irregular and porous surfaces, and then polymerizing, in the presence of the porous particles, monomers for forming gelled rubber-containing interpolymer particles having a Tg of less than 25.degree. C. No emulsification system is required for the rubber interpolymerization. Rubber-containing interpolymer particles in the order of 1 micron or less are formed on the surface of the suspension polyvinyl chloride particle. The process can be conducted in one reaction vessel and product contamination is reduced. The product can be used alone or blended with other thermoplastic polymers, such as polyvinyl chloride, to increase the impact strength thereof.
    Type: Grant
    Filed: December 2, 1975
    Date of Patent: October 28, 1980
    Assignee: Stauffer Chemical Company
    Inventor: Chung H. Wei
  • Patent number: 4223115
    Abstract: Novel structural adhesive systems for metal-bonding applications. The adhesives, comprising a solution or dispersion of a polymeric material in a monomer copolymerizable therewith having incorporated therein certain phosphorus-containing compounds, are characterized by an unexpected ability of providing strong adhesion to untreated metal surfaces without adversely affecting adhesive performance, including resistance to deleterious environments. The environmental resistance of the herein described adhesives can be further improved by the addition of one or more polybasic lead salts, metal molybdates and metal phosphates.
    Type: Grant
    Filed: April 24, 1978
    Date of Patent: September 16, 1980
    Assignee: Lord Corporation
    Inventors: Denis J. Zalucha, Frederick H. Sexsmith, Ernest C. Hornaman, Terrance H. Dawdy
  • Patent number: 4208490
    Abstract: A process for preparing polymer resins by polymerization of at least one ethylenic monomer onto at least one rubbery polymer optionally grafted with at least one ethylenic monomer which comprises initiating the polymerization in an emulsion system, adding a suspension stabilizer to the polymerization system at the stage after the conversion of the ethylenic monomer to be polymerized reaches 5% by weight and before the emulsion system is broken and then continuing the polymerization in a suspension system until completion of the polymerization. By the process, polymer resins can be produced in particles having a beautiful appearance and an even particle size with a narrow range of particle size distribution.
    Type: Grant
    Filed: October 25, 1977
    Date of Patent: June 17, 1980
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Masatsune Kondo, Akira Tanoue
  • Patent number: 4187202
    Abstract: A process for preparing polymer resins of high impact resistance which comprises coagulating a latex of a rubbery polymer grafted or not with at least one ethylenic monomer in the presence of a suspension stabilizer and a coagulating agent to make a stable aqueous suspension of coagulated particles of said rubbery polymer, adding at least one ethylenic monomer to the aqueous suspension and subjecting the resultant mixture to suspension polymerization.
    Type: Grant
    Filed: July 28, 1976
    Date of Patent: February 5, 1980
    Assignee: Sumitomo Chemical Company
    Inventors: Masatsune Kondo, Akira Tanoue
  • Patent number: 4161571
    Abstract: A process for production of the maleic anhydride adduct of a liquid polymer having a maleic anhydride addition amount of 2 to 70% by weight, which comprises reacting a liquid polymer having a molecular weight of 150 to 5,000 and a viscosity of 2 to 50,000 cp at 30.degree. C. in the presence of at least one compound, as a gelation inhibitor, selected from the group consisting of imidazoles, thiazoles, metallic salts of mercaptothiazoles, urea derivatives, naphthylamines, nitrosamines, iron, iron compounds and specific halogen compounds, said liquid polymer being selected from the group consisting of liquid polybutadienes, liquid polyisoprenes and liquid copolymers comprising units of butadiene or isoprene and units of at least one compound selected from the group consisting of other diolefins, olefins and aromatic vinyl compounds.
    Type: Grant
    Filed: October 18, 1977
    Date of Patent: July 17, 1979
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Seimei Yasui, Takao Oshima