Patents Examined by William F. Hamrock
  • Process for the preparation of chlorinated polymers
    Patent number: 4206093
    Abstract: A process for the preparation of chlorinated aliphatic polymers wherein chlorine-free polymers are chlorinated by using gaseous chlorine in chlorinated hydrocarbons as solvents and the chlorinated aliphatic polymers are recovered from the chlorinating solution by steam distillation in which process from 15 to 50% by weight of a lacquer resin is added to the chlorinating solution before steam distillation. The chlorinated polymers contain less residual solvent.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: June 3, 1980
    Assignee: Bayer Aktiengesellschaft
    Inventors: Klaus Hoehne, Johann Jelen, Diez Heine, Rolf Baatz
  • Method for preparing ABS type resin
    Patent number: 4206293
    Abstract: This invention relates to an improved process for preparing ABS resins wherein a alkadiene rubber is grafted in aqueous emulsion with styrene and nitrile type monomers, forming a grafted rubber, extracting said grafted rubber into a monomer phase and separating said monomer-grafted rubber phase from said aqueous phase followed by mass polymerizing said grafted rubber-monomer phase to form an ABS polyblend, wherein the improvement comprises, carrying out the mass polymerization of said monomers in the presence of sufficient carbon dioxide to provide an ABS resin having a substantially white color.
    Type: Grant
    Filed: July 14, 1978
    Date of Patent: June 3, 1980
    Assignee: Monsanto Company
    Inventor: Robert L. Kruse
  • Dyeable polyolefin composition
    Patent number: 4205148
    Abstract: A method for producing aminated copolymers by aminating ethylene-glycidyl acrylates copolymers, which comprises conducting the amination in a heterogeneous system using a mixed solvent of an amine and a lower alcohol, and a dyeable polyolefin composition comprising the said aminated copolymer and polyolefin.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: May 27, 1980
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Yoshiharu Tatsukami, Hazime Nishibara, Yasutoshi Kobayashi, Hideo Shinonaga
  • Halopolymers crosslinked with a 1,3-diaminopropane
    Patent number: 4204048
    Abstract: Halopolymers, such as chlorinated polyethylene, are uniquely vulcanized by heating a curable mixture including the halopolymer and a 1,3-diaminopropane or salt thereof. A preferred mixture further includes an acid acceptor, such as calcium oxide or calcium hydroxide, and sulfur or a sulfur-containing compound.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: May 20, 1980
    Assignee: The Dow Chemical Company
    Inventors: James L. Brewbaker, Rodrique L. Marzett
  • Continuous solution polymerization process
    Patent number: 4202954
    Abstract: Continuous solution polymerization in an open type reactor of one or more conjugated dienes or of one or more conjugated dienes with one or more vinyl aromatic compounds, initiated by an organolithium initiator, without clogging of the reactor due to gel formation can be achieved by conducting the polymerization in the presence of a deactivating system which inhibits the formation of gels.
    Type: Grant
    Filed: September 29, 1978
    Date of Patent: May 13, 1980
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Jean-Marie Massoubre
  • Chemical milling of neoprene rubber
    Patent number: 4201732
    Abstract: A process for improving the processability of high molecular weight neoprene polymers which comprises treating a solution of said polymers in an organic solvent with an organic peroxide at room temperature in the presence of oxygen to reduce the molecular weight of said neoprene and lower the viscosity of said solution.
    Type: Grant
    Filed: September 26, 1977
    Date of Patent: May 6, 1980
    Assignee: Pratt & Lambert, Inc.
    Inventors: Leon E. Wolinski, Richard G. Riebling, John H. Edholm
  • Multifunctional lithium containing initiator
    Patent number: 4201729
    Abstract: Highly desirable multifunctional lithium containing initiators are prepared by reacting a compound such as an organo lithium with an organic compound containing at least two 1,1-diphenylethylene groups. Such initiators can be prepared in the absence of polar solvents and are very desirable for the polymerization of dienes such as butadiene to a desirable 1,4 configuration. Several di-lithium compounds have been employed to initiate polymerization of various unsaturated organic monomers.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: May 6, 1980
    Assignee: The Dow Chemical Company
    Inventors: Lu H. Tung, Grace Y-S. Lo, Joseph W. Rakshys, Douglas E. Beyer
  • Bladder for liquid dispenser
    Patent number: 4201207
    Abstract: An improvement in liquid dispensers, especially those used to infuse liquid drugs into patients, that dispense liquid under pressure from an expansible, elastomer bladder is disclosed. The improvement is that the bladder is made from synthetic vulcanized polyisoprene, especially polyisoprene that has 90% to 98% cis linkages and has been vulcanized with an organic peroxide, such as dicumyl peroxide, at a concentration of 5.5.times.10.sup.-3 to 7.5.times.10.sup.-3 moles of peroxide per 100 grams of polyisoprene.
    Type: Grant
    Filed: November 26, 1976
    Date of Patent: May 6, 1980
    Assignee: ALZA Corporation
    Inventors: Richard G. Buckles, Harold M. Leeper
  • Process for the manufacture of heat-stable, nuclear-brominated polystyrenes
    Patent number: 4200703
    Abstract: In a process for the manufacture of a heat-stable, nuclear-brominated polystyrene by brominating, at -20.degree. C. to +40.degree. C., a polystyrene dissolved in a chlorinated hydrocarbon in the presence of a Lewis acid catalyst, an improvement is provided wherein the catalyst further comprises 0.02 to 2 moles, per mole of Lewis acid, of a nucleophilic substance which acts as a Lewis base for the Lewis acid.
    Type: Grant
    Filed: January 2, 1979
    Date of Patent: April 29, 1980
    Assignee: Chemische Werke Huls A.G.
    Inventors: Klaus Diebel, Horst-Dieter Wulf, Raban Grundmann, Gunther Maahs
  • Multifunctional lithium containing initiator
    Patent number: 4200718
    Abstract: Highly desirable multifunctional lithium containing initiators are prepared by reacting a compound such as an organo lithium with an organic compound containing at least two 1,1-diphenylethylene groups. Such initiators can be prepared in the absence of polar solvents and are very desirable for the polymerization of dienes such as butadiene to a desirable 1,4 configuration. Several di-lithium compounds have been employed to initiate polymerization of various unsaturated organic monomers.
    Type: Grant
    Filed: December 12, 1977
    Date of Patent: April 29, 1980
    Assignee: The Dow Chemical Company
    Inventors: Lu H. Tung, Grace Y-S. Lo, Joseph W. Rakshys, Douglas E. Beyer
  • Process for preparing fluorine-containing polymers having carboxyl groups
    Patent number: 4200711
    Abstract: A process for preparing a fluorine-containing polymer having carboxyl groups, which comprises subjecting a fluorine-containing polymer having sulfonyl halide groups bonded to it to an oxidation reaction at a temperature of not more than 250.degree. C.; and a process for electrolysis, using as a diaphragm a member of the polymer obtained by the above process.
    Type: Grant
    Filed: April 21, 1978
    Date of Patent: April 29, 1980
    Assignee: Tokuyama Soda Kabushiki Kaisha
    Inventors: Yasuharu Onoue, Toshikatsu Sata, Akihiko Nakahara, Junichi Itoh
  • Preparation of polyvinylpyrrolidone-iodine
    Patent number: 4200710
    Abstract: A process for the preparation of PVP-iodine by reacting polyvinylpyrrolidone powder with elementary iodine at from 70.degree. to 100.degree. C. The reaction is carried out in the presence of formic acid, oxalic acid or an ammonium salt or amide of carbonic acid, formic acid or oxalic acid. The process avoids the disadvantage of long periods of heating, which can result in degradation of the polyvinylpyrrolidone, and is particularly suitable for the preparation of a stable PVP-iodine using a low molecular weight polyvinylpyrrolidone.
    Type: Grant
    Filed: April 17, 1979
    Date of Patent: April 29, 1980
    Assignee: BASF Aktiengesellschaft
    Inventors: Walter Denzinger, Hans-Uwe Schenck, Wolfgang Schwarz
  • Impregnated metal-polymeric functional beads
    Patent number: 4197220
    Abstract: Amine containing polymeric microspheres such as polyvinyl pyridine are complexed with metal salts or acids containing metals such as gold, platinum or iron. After reduction with sodium borohydride, the salt is reduced to finely divided free metal or metal oxides, useful as catalysts. Microspheres containing covalent bonding sites can be used for labeling or separating proteins.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: April 8, 1980
    Assignee: California Institute of Technology
    Inventors: Alan Rembaum, Willi Volksen
  • Process for chlorinating ethylene polymers
    Patent number: 4197386
    Abstract: An improved process for chlorinating high density polyethylene "in bulk" is described, with a two-stage reaction, the first at temperatures below the crystalline melting point, and the second above that temperature, and using a polyethylene starting material having a critical combination of characteristics, as described.
    Type: Grant
    Filed: February 16, 1978
    Date of Patent: April 8, 1980
    Assignee: Stamicarbon, B.V.
    Inventor: Lowhardt A. A. Schoen
  • High nitrile resins containing maleic anhydride
    Patent number: 4197263
    Abstract: Polymeric compositions having high softening temperatures, good gas barrier properties and low creep properties are composed of an olefinically unsaturated nitrile, another monovinyl component and maleic anhydride and optionally a diene monomer.
    Type: Grant
    Filed: September 20, 1978
    Date of Patent: April 8, 1980
    Assignee: The Standard Oil Company
    Inventors: George S. Li, John F. Jones
  • Soluble multifunctional lithium containing initiator
    Patent number: 4196154
    Abstract: Highly desirable organic liquid soluble multifunctional lithium containing initiators are prepared by reacting an organo lithium compound with an organic compound containing at least one group of the configuration 1,3-bis(1-phenylethenyl)benzene. Such initiators can be prepared in the absence of polar solvents and are very desirable for the polymerization of dienes such as butadiene to a desirable 1,4 configuration.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: April 1, 1980
    Assignee: The Dow Chemical Company
    Inventors: Lu H. Tung, Grace Y-S. Lo, Douglas E. Beyer
  • Polyfunctional lithium containing initiator
    Patent number: 4196153
    Abstract: Very desirable polyfunctional lithium containing polymerization initiators are prepared by reacting an adduct of an organo lithium compound and styrene with an organic compound containing at least two 1,1-diphenylethylene groups in the proportion of about two moles of the adduct to one mole of the organic compound. A difunctional lithium initiator is prepared thereby. The difunctional initiator may be reacted with styrene and subsequently an additional quantity of the diphenylethylene compound which in turn is reacted with the styrene-organo lithium adduct to form a trifunctional initiator. The process can be repeated to obtain an initiator having any desired degree of lithium functionality. Such initiators can be prepared in the absence of polar solvents and are very desirable for the polymerization of dienes such as butadiene to a desirable 1,4 configuration and preparation of block copolymers.
    Type: Grant
    Filed: August 7, 1978
    Date of Patent: April 1, 1980
    Assignee: The Dow Chemical Company
    Inventors: Lu H. Tung, Grace Y-S Lo
  • Modified tertiary amide polymers
    Patent number: 4195142
    Abstract: Polymers having a tertiary amide group, particularly homopolymers and copolymers of vinylpyrrolidone, are modified by treatment with reactive acid chlorides, the amide functions being converted into amide chlorides. These modified polymers are reactive intermediates and may be used to obtain a variety of new polymeric substances.
    Type: Grant
    Filed: June 24, 1977
    Date of Patent: March 25, 1980
    Assignee: GAF Corporation
    Inventor: Kenneth W. Dixon
  • Non-pulverulent solid polymeric structure
    Patent number: 4192933
    Abstract: A non-pulverulent solid polymeric structure is disclosed which has at least one pendant diaminotriazine ring. The structure is made by immersing a non-pulverulent solid structure which has at least one pendant nitrile group into a basic solution of cyanoguanidine at a temperature which does not dissolve the structure.
    Type: Grant
    Filed: May 31, 1978
    Date of Patent: March 11, 1980
    Assignee: Westinghouse Electric Corp.
    Inventor: Leonard E. Edelman
  • Continuous solution polymerization process
    Patent number: 4189555
    Abstract: Continuous solution polymerization in an open type reactor of one or more conjugated dienes or of one or more conjugated dienes with one or more vinyl aromatic compounds, initiated by an organolithium initiator, without clogging of the reactor due to gel formation can be achieved by conducting the polymerization in the presence of a deactivating system which inhibits the formation of gels.
    Type: Grant
    Filed: September 15, 1976
    Date of Patent: February 19, 1980
    Assignee: Compagnie Generale des Etablissements Michelin
    Inventor: Jean-Marie Massoubre