Patents Examined by N. Sarofin
  • Drying temperature independent polytetrafluoroethylene
    Patent number: 5185414
    Abstract: The present invention is directed to a product and method of incrementally adding comonomers to co-polytetrafluoroethylene (PTFE) by an improved process, resulting in a PTFE product independent and/or much less dependent upon drying temperatures. The improved PTFE exhibits increased green strength at substantially constant extrusion pressures and an extrusion pressure that is substantially independent of drying temperatures of the wet PTFE.
    Type: Grant
    Filed: January 18, 1991
    Date of Patent: February 9, 1993
    Assignee: ICI Americas Inc.
    Inventor: Walter G. Mellish
  • Process for producing fluorine-containing copolymer and fluorine-containing copolymer composition
    Patent number: 5179181
    Abstract: According to the present invention, there is provided an improvement of a process for producing fluorine-containing copolymers comprising copolymerizing(a) a chlorinated fluoroolefin,(b) vinyl ether, and(c) an organosilicon compound having an olefinically unsaturated bond and a hydrolyzable bond,the improvement resides in that a chlorine trapping agent is allowed to exist in the system during the copolymerization reaction and/or the purification of the resulting copolymer, and the fluorine-containing copolymers are free from coloration.Further, according to the present invention, a fluorine-containing copolymer composition containing a specific curing catalyst is also provided and said composition is excellent in adhesion to substrates or base materials.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: January 12, 1993
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Shiro Honma, Takashi Izumi, Hajime Inagaki, Sakae Murakami
  • Paper coating composition
    Patent number: 5177128
    Abstract: A paper coating composition is prepared containing a polymer emulsion which comprises a first polymer network which is intertwined on a molecular scale with a second polymer network.
    Type: Grant
    Filed: February 6, 1989
    Date of Patent: January 5, 1993
    Assignee: Sequa Chemicals, Inc.
    Inventors: Martin K. Lindemann, Kim Deacon
  • New fluoroelastomers based on vinylidene fluoride, hexafluoropropene and tetrafluoroethylene
    Patent number: 5175223
    Abstract: The invention relates to new fluoroelastomers endowed with a low Tg and a low compression set at low temperature, characterized by the following monomeric composition:______________________________________ vinylidene fluoride: 60.5-64% by weight hexafluoropropene: 30-33% by weight tetrafluoroethylene: 5-8% by weight.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: December 29, 1992
    Assignee: Ausimont S.p.A.
    Inventors: Giulio Brinati, Margherita Albano, Vincenzo Arcella
  • Fluorine-containing copolymer, process for its production and curable composition
    Patent number: 5155173
    Abstract: A fluorine-containing copolymer having fluidity at room temperature and comprising, based on entire polymer units, from 20 to 70 mol % of polymer units (1) derived from a polyfluoroolefin and from 1 to 80 mol % of polymer units (2) having a polyoxyalkylene chain having, at its terminal, a group selected from the group consisting of an active hydrogen-containing group, an epoxy group and a functional group cross-linkable by the action of moisture, the total of the polymer units (1) and the polymer units (2) being from 30 to 100 mol %.
    Type: Grant
    Filed: September 30, 1991
    Date of Patent: October 13, 1992
    Assignee: Asahi Glass Company, Ltd.
    Inventors: Ryuichi Miura, Ken Moriwaki, Hiromitu Takeyasu, Hiroshi Washita, Nobuyuki Miyazaki
  • Preparation of hydroxylated low molecular weight polymodal butadiene polymers
    Patent number: 5153287
    Abstract: Hydroxy-containing, propylene carbonate insoluble butadiene polymers having an average molecular weight of about 400 to about 25,000 and containing an average of about 2 hydroxyl groups per molecule are prepared by polymerizing butadiene in a homogeneous reaction medium consisting essentially of a propylene carbonate solution of an aqueous solution of hydrogen peroxide at a temperature within the range of about 100.degree. to about 200.degree. C. for a reaction time within the range of about 1 to about 2 hours to thereby form the butadiene polymer and by recovering the butadiene polymer.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: October 6, 1992
    Assignee: Texaco Chemical Company
    Inventors: Ernest L. Yeakey, Wei-Yang Su
  • Curable mixes of fluoroelastomers containing bormine or iodine and of organic peroxides
    Patent number: 5153272
    Abstract: There are described mixes, which are curable by using radical intermediates, are based on fluoroelastomers containing bromine or iodine, exhibit, during curing, a low emission of toxic vapors of methyl bromide or iodide and are characterized in that they contain, as cross-linking agents, peroxides having the following formulas: ##STR1## wherein the substitutents from R.sub.1 to R.sub.17 have the significances defined in the specification.
    Type: Grant
    Filed: July 23, 1990
    Date of Patent: October 6, 1992
    Assignee: Ausimont S.r.l.
    Inventors: Graziella Chiodini, Attilio LaGostina, Michele Merenda, Anna Minutillo, Ezio Montessoro
  • Copolymerization of vinyl acetate and a fluoromonomer in an aqueous medium
    Patent number: 5151477
    Abstract: A process of preparing a copolymer of vinyl monomer such as vinyl acetate, vinyl propionate and vinyl trifluoroacetate, and of fluorinated monomers such as tetrafluoroethylene and trifluoroethylene, said copolymer having an alternating or substantially alternating distribution of vinyl recurring monomeric units and fluorinated recurring monomeric units in the copolymer backbone which comprises copolymerizing said monomers in an aqueous reaction medium comprising water and a water miscible organic co-solvent in an amount less than the amount sufficient to form a distinct organic co-solvent phase.
    Type: Grant
    Filed: November 22, 1991
    Date of Patent: September 29, 1992
    Assignee: Allied-Signal Inc.
    Inventors: Bryce C. Oxenrider, David J. Long, Frank Mares
  • Methods for preparing and using a water dilutable copolymer and aqueous coating composition prepared therewith
    Patent number: 5136000
    Abstract: A copolymer containing a hydroxy and a carboxyl moiety and is dilutable with water after neutralization with an organic base, which copolymer is from an alkyl ester and/or hydroxyalkyl ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid in which the alkyl moiety is interrupted by one or more oxygen atoms and the alkyl moiety of the hydroxyalkyl ester can contain one or more hydroxyl groups, an .alpha.,.beta.-ethylenically unsaturated carboxylic acid, and an optionally copolymerizable vinyl monomer, and has an acid number of from about 20 to about 50, and an OH number of from about 40 to about 90, and contains incorporated by polymerization from about 0.5 to about 5% wt. based on the monomers used for its preparation of one or more perfluoroalkyl ethyl ester of an .alpha.,.beta.-ethylenically unsaturated carboxylic acid containing a C.sub.6-18 alkyl moiety.
    Type: Grant
    Filed: August 30, 1991
    Date of Patent: August 4, 1992
    Assignee: Herberts GmbH
    Inventors: Johannes Luttenberger, Herbert Zima, Werner Wilfinger, Ingo Kriessmann, Hermann Schaffer
  • Hydroxy containing fluorovinyl compounds and polymers thereof
    Patent number: 5134211
    Abstract: Novel hydroxy containing fluorovinyl ethers, polymers of hydroxy containing fluorovinyl ethers, novel cyclic ethers, copolymers of selected hydroxy containing fluorovinyl ethers, a process for reducing ester containing fluorovinyl compounds to the corresponding alcohol with borohydrides, and a process for polymerizing hydroxy containing fluorovinyl ethers are disclosed.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: July 28, 1992
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: William B. Farnham, Ming-Hong Hung
  • Low melt ethylene vinyl acetate copolymer film
    Patent number: 5120787
    Abstract: Ethylene vinyl acetate copolymer films having about 25%-33% by weight vinyl acetate and melting points of about 160.degree.-170.degree. F. are provided for packaging, lining or wrapping purposes. Low melt bags for rubber compounds and additives are made from the films.
    Type: Grant
    Filed: July 5, 1991
    Date of Patent: June 9, 1992
    Assignee: J. Drasner & Co., Inc.
    Inventor: Joseph Drasner
  • Resin composition suitable for substantially solvent-free paint compositions
    Patent number: 5102742
    Abstract: The invention relates to a resin composition for substantially solvent-free paint compositions. The resin composition is a reaction product on the basis ofA) one or more polyalcohols entirely or partly esterified with unsaturated fatty acids,B) an unsaturated compound with fewer than 20 carbon atoms andC) one or more compounds with at least one copolymerizable terminal ethylene group,the molar ratio of A) and C) is between 0.8:1.2 and 1.2:0.8 and the amount of copolymerizable unsaturated compound C) being substantially the same before and after the reaction of A) and C).
    Type: Grant
    Filed: July 26, 1991
    Date of Patent: April 7, 1992
    Assignee: Stamicarbon B.V.
    Inventors: Adriaan Hoflan, Dick A. Pons
  • Low molecular weight water soluble phosphinate and phosphonate containing polymers
    Patent number: 5077361
    Abstract: A process to efficiently utilize the chain transfer agent hypophosphorous acid or salts in the preparation of low moelcular weight polycarboxylate polymers comprising employing in process neutralization of the carboxylic acid monomers.A low molecular weight polycarboxylate polymer containing phosphinate and phosphonate functional groups where less than 20% of the phosphorus is present in inorganic non polymeric compounds.
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: December 31, 1991
    Assignee: Rohm and Haas Company
    Inventors: Kathleen A. Hughes, Graham Swift
  • Method for preparing imide-containing polymers
    Patent number: 5077343
    Abstract: Imide-containing polymers of styrene-type monomers are prepared by a process comprising solution polymerizing under free radical polymerization conditions a polymerizable monomer composition comprising at least one vinylaromatic monomer and at least one maleamic monocarboxylic acid monomer.
    Type: Grant
    Filed: February 8, 1991
    Date of Patent: December 31, 1991
    Assignee: The Dow Chemical Company
    Inventor: Thomas H. Newman
  • Fluorine-containing copolymer, process for its production and curable composition
    Patent number: 5073613
    Abstract: A fluorine-containing copolymer having fluidity at room temperature and comprising, based on entire polymer units, from 20 to 70 mol % of polymer units (1) derived from a polyfluoroolefin and from 1 to 80 mol % of polymer units (2) having a polyoxyalkylene chain having, at its terminal, a group selected from the group consisting of an active hydrogen-containing group, an epoxy group and a functional group cross-linkable by the action of moisture, the total of the polymer units (1) and the polymer units (2) being from 30 to 100 mol %.
    Type: Grant
    Filed: May 19, 1989
    Date of Patent: December 17, 1991
    Assignee: Asahi Glass Company, Ltd.
    Inventors: Ryuichi Miura, Ken Moriwaki, Hiromitu Takeyasu, Hiroshi Washita, Nobuyuki Miyazaki
  • Copolymerization of vinyl acetate and a fluoromonomer in an aqueous medium
    Patent number: 5070162
    Abstract: A process of preparing a copolymer of vinyl monomer selected from the group consisting of vinyl acetate, vinyl propionate and vinyl trifluoroacetate, and of fluorinated monomer selected from the group consisting of tetrafluoroethylene and trifluoroethylene, said copolymer having an alternating or substantially alternating distribution of vinyl recurring monomeric units and fluorinated recurring monomeric units in the copolymer backbone which comprises copolymerizing said monomers in an aqueous reaction medium comprising water and a water miscible organic co-solvent in an amount less than the amount sufficient to form a distinct organic co-solvent phase.
    Type: Grant
    Filed: October 20, 1989
    Date of Patent: December 3, 1991
    Assignee: Allied-Signal Inc.
    Inventors: Bryce C. Oxenrider, David J. Long, Frank Mares
  • Fluorine-containing copolymer and coating composition containing the copolymer
    Patent number: 5064920
    Abstract: The present invention provides a fluorine-containing copolymer which comprises the following monomers as essential components:(a) a fluoroolefin,(b) a hydroxyalkyl crotonate, and(c) a vinyl monomer other than the above monomers (a) and (b). The present invention further provides a coating composition comprising the above fluorine-containing copolymer and a crosslinking agent having a functional group which reacts with hydroxyl group.
    Type: Grant
    Filed: November 13, 1990
    Date of Patent: November 12, 1991
    Assignee: Toagosei Chemical Industry Co., Ltd.
    Inventors: Etsuzo Marumoto, Masanobu Koyama, Akihito Iida, Yukiya Sakamoto, Makoto Aoyama, Mamoru Takahashi
  • Hydroxylamine or amine oxide containing polyphenolic compounds and uses thereof
    Patent number: 5063089
    Abstract: A metal treatment solution comprising an effective amount of a soluble or dispersible compound which is a derivative of a polyphenol. The present invention comprises novel derivatives of polyphenol compounds useful in the treatment of the surface of metal articles. The present invention also encompasses novel surface treatment solutions or dispersions, and methos of using these solutions or dispersions. The compositions of the present invention include amine oxide containing polyphenol compounds and derivatives thereof. The molecular weight of the polyphenols used in derivatives of the present invention have molecular weights of from about 360 to about 30,000 or greater. The resulting derivatives of the present invention typically have a molecular weight of up to about 2,000,000 with molecular weights within the range of about 700 to about 70,000 being preferred.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: November 5, 1991
    Assignee: Henkel Corporation
    Inventors: Andreas Lindert, John R. Pierce, David R. McCormick
  • Hydroxy containing fluorovinyl compounds and polymers thereof
    Patent number: 5059720
    Abstract: Novel hydroxy containing fluorovinyl ethers, polymers of hydroxy containing fluorovinyl ethers, copolymers of selected hydroxy containing fluorovinyl ethers, a process for reducing ester containing fluorovinyl compounds to the corresponding alcohol with borohydrides, and a process for polymerizing hydroxy containing fluorovinyl ethers are disclosed.
    Type: Grant
    Filed: October 9, 1990
    Date of Patent: October 22, 1991
    Assignee: E. I. Du Pont de Nemours and Company
    Inventor: Ming-Hong Hung
  • Vinylidene cyanide alternating copolymers
    Patent number: 5057588
    Abstract: In one embodiment this invention provides vinylidene copolymers with alternating monomeric units as illustrated by the following structure: ##STR1## An invention vinylidene copolymer in the form of an electret film exhibits a high level of longitudinal piezoelectric effect, and has excellent processability and thermal stability properties.
    Type: Grant
    Filed: March 9, 1990
    Date of Patent: October 15, 1991
    Assignee: Hoechst Celanese Corp.
    Inventors: Anthony J. East, Anthony B. Conciatori