Patents Examined by Mary Critharis
  • Patent number: 5688890
    Abstract: A thermoplastic polyurethane composition comprises a thermoplastic polyurethane and a tin compound. The tin compound is contained in an amount of 0.3 to 15 ppm as converted into tin atom based on the thermoplastic polyurethane. The thermoplastic polyurethane composition has a retention ratio of long-chain hard segments when melt treated at 220.degree. C. for 60 minutes of at least 85%. The thermoplastic polyurethane composition also has a retention ratio of inherent viscosity when melt treated at 220.degree. C. for 6 minutes and then melt extruded and, thereafter, allowed to stand at 20.degree. C., 60% RH (relative humidity) for 24 hours of at least 85%. The thermoplastic polyurethane composition has excellent mold-ability and gives molded products being excellent in tensile strength and elongation, heat resistance, compression set, resistance to hydrolysis and like properties, and are hence useful as a raw material for various items.
    Type: Grant
    Filed: December 29, 1994
    Date of Patent: November 18, 1997
    Assignee: Kuraray Co., Ltd.
    Inventors: Michihiro Ishiguro, Tatuya Oshita, Hiroyuki Ono, Kimio Nakayama, Koji Hirai
  • Patent number: 5686136
    Abstract: A method for providing improved specific saturation magnetization of coated iron pigments by coating the iron pigments through contacting them with a solution of a copolymer of a reactive aminoquinone, removing the excess copolymer and drying the coated pigments is provided.
    Type: Grant
    Filed: June 15, 1994
    Date of Patent: November 11, 1997
    Assignee: University of Alabama
    Inventors: David Eugene Nikles, Jeng-Li Liang
  • Patent number: 5679418
    Abstract: A polyurethane composition suitable for producing leather-like sheets having a soft hand and excellent durability and being dyeable with acid dyes comprising a mixture of:a first polyurethane (a) obtained by reacting:an intermediate product diol (D) with both ends thereof substantially being OH and obtained by reacting a tertiary amino group-containing diol (A), a polymer diol (B) having a number average molecular weight of 500 to 3,000 selected from the group consisting of polyesters, polycarbonates, polylactones and polyethers and an organic diisocyanate (C1), in such stoichiometric amounts as to make the molar ratio of NCO/OH 0.5 to 0.
    Type: Grant
    Filed: November 7, 1995
    Date of Patent: October 21, 1997
    Assignee: Kuraray Co., Ltd.
    Inventor: Toshiyuki Akasawa
  • Patent number: 5672647
    Abstract: An aqueous nail varnish free from nitrocellulose and having improved spreading properties contains 10 to 59 weight percent of a film-forming polymer present in a dispersed state, 0.01 to 1 weight percent of a water-soluble perfluoroalkyl and 40 to 90 weight percent of water.
    Type: Grant
    Filed: May 31, 1995
    Date of Patent: September 30, 1997
    Assignee: L'Oreal
    Inventors: Valerie de La Poterie, Myriam Mellul
  • Patent number: 5658992
    Abstract: Polyethylene compositions, which can be processed by injection molding, comprising 40% to 99% of a polyethylene having a limiting viscosity number of 1000 to 5000 ml/g and 60% to 1% of a polyethylene having a limiting viscosity number of 100 to 700 ml/g. The molecular weight distribution of each of the polyethylene components is less than 9. The limiting viscosity number of the compositions is at least 1500 ml/g. Shaped articles produced from these compositions have excellent wear resistance, high notched impact strength, and do not delaminate.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: August 19, 1997
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Jens Ehlers, Norbert Freisler, Hermann van Laak
  • Patent number: 5658672
    Abstract: A one-part, solvent free in-mold coating composition exhibiting good hardness, good crack resistance, and good adhesion to fiber reinforced plastic substrates includes a blend of a urethane polyacrylate compound having three or more (meth)acrylate groups, a urethane diacrylate or urethane divinyl compound, one or more adhesion promoters, and one or more ethylenically unsaturated copolymerizable monomers.
    Type: Grant
    Filed: May 8, 1995
    Date of Patent: August 19, 1997
    Assignee: GenCorp Inc.
    Inventors: Gerd M. Lenke, Earl G. Melby, H. William Cocain
  • Patent number: 5656701
    Abstract: The improved polyurethane resin has a number average molecular weight of 2,000-200,000 and is prepared by reacting an organic diisocyanate compound, a polymer diol compound, a chain extender and a terminator. It is characterized by having at least one group selected from hydrazine groups, hydrazide groups and semicarbazide groups in the molecule. The polyurethane resin can be produced using a chain extender and/or a terminator that have at least one hydrazine group or hydrazide group. This polyurethane resin can be dispersed in water in the presence of an emulsifier or by first introducing free carboxyl groups into the molecule of the resin and then dissolving or dispersing it in an aqueous alkali solution or by first introducing tertiary amino groups into the molecule of the resin and then dissolving or dispersing it in an aqueous acid solution. The water-based polyurethane resin can be used either as a binder for water-based printing inks or as a water-based laminating adhesive.
    Type: Grant
    Filed: November 8, 1993
    Date of Patent: August 12, 1997
    Assignee: Sakata Inx Corp.
    Inventors: Takahito Miyamoto, Kyoichi Kotani
  • Patent number: 5645219
    Abstract: The addition polymerization resin systems phthalonitrile, diethynyldiphenyl methane, phenolic triazine, and polyphosphazene are disclosed as the matrix constituent in fiber-reinforced ablative nozzle components. Various types of fibers such as carbon fibers, preferably rayon and polyacrylonitrile (PAN) based, graphite fibers, glass fibers, ceramic fibers, and silica fibers may be used in the nozzle composite materials. Fillers, such as carbon black, ground silica, ground petroleum coke, and microballoons, may also be included in the ablative nozzle components. The fiber-reinforced ablative nozzle components include from about 20% to about 40% resin, by weight, from about 45% to about 60% fiber, by weight, and when present, from about 3% to about 15% filler, by weight.
    Type: Grant
    Filed: August 3, 1993
    Date of Patent: July 8, 1997
    Assignee: Thiokol Corporation
    Inventors: Michael W. Miks, John K. Shigley
  • Patent number: 5639818
    Abstract: The instant invention is directed to a process for preparing peroxide modified polypropylene/polyethylene blends that have superior extrusion coating properties. More specifically, the peroxide modified PP/PE blends produced by the instant invention exhibit a pronounced viscosity upturn at low frequencies (about <1.0 rad/sec) in the dynamic rheological data. Specifically, the blends show an increase in their dynamic complex viscosity, .eta.*, and dynamic storage modulus, G' values at frequencies of less than about 1.0 rad/sec. The present invention also relates to peroxide modified PP/PE blends that are produced from the process of the instant invention. Such polymeric blends that are produced from the inventive method exhibit superior dynamic theological properties, especially melt strength, compared with prior art blends. Moreover, the peroxide modified PP/PE blends of the present invention show markedly reduced draw resonance behavior.
    Type: Grant
    Filed: March 11, 1994
    Date of Patent: June 17, 1997
    Assignee: Quantum Chemical Corporation
    Inventors: Chun D. Lee, Ramesh N. Shroff, Manivakkam J. Shankernarayanan
  • Patent number: 5639816
    Abstract: Disclosed are a polypropylene composition comprising 95-55 parts by weight of polypropylene (A) and 5-45 parts by weight of an ethylene/1-butene random copolymer (B-1) which contains constituent units derived from 1-butene in an amount of 15 to 25% by mol; and a polypropylene composition comprising 95-55 parts by weight of polypropylene (A) and 5-45 parts by weight of an ethylene/1-octene random copolymer (B-2) which contains constituent units derived from 1-octene in an amount of 8 to 20% by mol. Each of the random copolymers (B-1) and (B-2) has an intrinsic viscosity [.eta.] of 1.5 to 3.5 dl/g as measured in decalin, a glass transition temperature (Tg) of not higher than -50.degree. C., a crystallinity of less than 20% as measured by X-ray diffractometry, a randomness parameter (B value) of 1.0 to 1.4 as measured by .sup.13 C-NMR spectroscopy. With respect to a melting point as measured by a differential scanning calorimeter (DSC) as the main peak, the copolymer (B-1) has a value of not higher than 60.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 17, 1997
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Masayoshi Yamaguchi, Akio Ishimoto, Hiroshi Wakumoto, Masahiro Sugi
  • Patent number: 5639829
    Abstract: Disclosed are a polypropylene composition comprising 95-55 parts by weight of polypropylene (A) and 5-45 parts by weight of an ethylene/1-butene random copolymer (B-1) which contains constituent units derived from 1-butene in an amount of 15 to 25% by mol; and a polypropylene composition comprising 95-55 parts by weight of polypropylene (A) and 5-45 parts by weight of an ethylene/1-octene random copolymer (B-2) which contains constituent units derived from 1-octene in an amount of 8 to 20% by mol. Each of the random copolymers (B-1) and (B-2) has an intrinsic viscosity [.eta.] of 1.5 to 3.5 dl/g as measured in decalin, a glass transition temperature (Tg) of not higher than -50.degree. C., a crystallinity of less than 20% as measured by X-ray diffractometry, a randomness parameter (B value) of 1.0 to 1.4 as measured by .sup.13 C-NMR spectroscopy. With respect to a melting point as measured by a differential scanning calorimeter (DSC) as the main peak, the copolymer (B-1) has a value of not higher than 60.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 17, 1997
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Masayoshi Yamaguchi, Akio Ishimoto, Hiroshi Wakumoto, Masahiro Sugi
  • Patent number: 5633328
    Abstract: The present invention provides a release coating composition which is easy to coat on a matter to be coated and forms a release coating composition layer having high heat resistance and difficulty in release coat transfer to an adhesive layer, and also provides a release sheet having a release coating composition layer of which heat resistance is high and release coat transfer to an adhesive layer is hard to occur. The release coating composition comprises: (A) an addition product between a polyamine compound having at least two of an active hydrogen-containing amino group per one molecule and a monoisocyanate compound having an alkyl group of 8 or more in carbon number; (B) a compound having, per one molecule, at least two of a functional group reactive with an active hydrogen of the amino group; and (C) at least one kind of diluent selected from an organic solvent and water.
    Type: Grant
    Filed: March 14, 1995
    Date of Patent: May 27, 1997
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Koji Tsujinaka, Ichimoto Akasaki
  • Patent number: 5633307
    Abstract: A two-component coating composition is disclosed wherein the binder components comprise: (a) an amino component comprising an aqueous solution and/or dispersion of at least one polyacrylate containing amino groups in a quantity sufficient to make said polyacrylate soluble and/or dispersible in water upon neutralization with acid; and (b) a polyisocyanate component containing free isocyanate groups. Also disclosed is the method of emulsifying component (b) into component (a).
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: May 27, 1997
    Assignee: PPG Industries, Inc.
    Inventors: Suryya K. Das, Soner Kilic, Robert E. Jennings, Stephen J. Thomas, Joseph M. Carney
  • Patent number: 5626910
    Abstract: A process for producing a surface-modified molded product of synthetic resin, which comprises contacting a fluorine-containing gas to the surface of a molded product of synthetic resin and then contacting a polymerizable monomer to form a new polymer layer on the surface of the molded product.
    Type: Grant
    Filed: January 27, 1995
    Date of Patent: May 6, 1997
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Yasuo Tanabe, Koshi Sasaki, Hidehiko Ohara, Naoshi Imaki
  • Patent number: 5614589
    Abstract: Transparent methacrylate-acrylonitrile-butadiene-styrene (MABS) thermoplastic copolymers may be provided with electrostatic dissipative (ESD) properties, while maintaining or enhancing physical properties of the MABS, such as impact strength, by blending the MABS with an inherently antistatic thermoplastic urethane copolymer which is the reaction product of a hydroxy-terminated polyalkylene ether oligimer, a C.sub.2 -C.sub.6 alkanediol and an aromatic diisocyanate, and compatibilizing the blend of MABS and urethane with an acrylonitrile-butadiene-styrene rubbery copolymer produced by emulsion polymerization containing at least 40 weight percent butadiene monomer and a ratio of styrene to acrylonitrile which will produce a rubbery copolymer having a refractive index in the range of about 1.53 to 1.55. All three copolymer components of the transparent blend have refractive indices in the range of about 1.53 to 1.55.
    Type: Grant
    Filed: November 15, 1993
    Date of Patent: March 25, 1997
    Assignee: Kawasaki Chemical Holding Co., Inc.
    Inventors: George E. Niznik, Arie Hochberg
  • Patent number: 5614590
    Abstract: A transparent coating agent which is free of heavy metal catalysts and which contains a hydroxy functional (meth)acrylic copolymer based binder, an aliphatic or cycloaliphatic polyisocyanate crosslinking agent, a solvent, and lacquer adjuvant.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: March 25, 1997
    Assignee: Herberts Gesellschaft mit beschrankterhaftung
    Inventors: Klaus Bederke, Friedrich Herrmann, Hermann Kerber, Hans-Martin Schonrock
  • Patent number: 5607644
    Abstract: An optical sensor is provided for measuring the pH of a fluid sample. The sensor is formulated using a fluorescent polymer composition comprising a copolymer of a water-dispersable, polyether-containing urethane olefin precursor and a fluorescent monomer species, wherein the ratio of precursor and fluorescent monomer species is such that a predetermined apparent pKa is provided. The sensor is prepared by coating the distal end of an optical waveguide with the fluorescent polymer composition, and curing the copolymer contained in the composition, e.g., by exposure to radiation of a suitable wavelength.
    Type: Grant
    Filed: June 10, 1993
    Date of Patent: March 4, 1997
    Assignee: Optical Sensors Incorporated
    Inventors: Alan Olstein, William Fowler, Jo Pritchard
  • Patent number: 5602213
    Abstract: A heat resistant composition comprising a mixture of (a) a polyurethane or a modified polyurethane and (b) a bismaleimide oligomer, in which the bismaleimide oligomer is in an amount of about 1 to 35 percent by weight based on overall solid contents. The polyurethane is formed by reacting a diisocyanate-containing compound with a dihydroxy diol-compound. Then the polyurethane is reacted with a trimellitic anhydride, a diacid or a mixture thereof to form the modified polyurethane. The bismaleimide oligomer is formed by reacting a bismaleimide resin with a barbituric acid or a derivative thereof.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: February 11, 1997
    Assignee: Industrial Technology Research Institute
    Inventors: Sheng-Yaw Hsu, Tzong-Ming Lee, Jing-Pin Pan
  • Patent number: 5601889
    Abstract: This invention relates to a polymer article prepared by the process comprising the steps of: (1) blending polymer composition comprising (A) at least one ethylene vinyl acetate copolymer, (B) at least one propylene ethylene copolymer, and (C) (1) from about 0.01% to about 5% by weight of a cross-linking agent, (2) from about 0.1% to about 35% by weight of one or more polymers selected from: (i) at least one co-, or terpolymer of at least one vinyl aromatic compound; (ii) at least one co-, or terpolymer of an alpha-olefin, and at least one monomer selected from the group consisting of an acrylic acid, an acrylic ester, a vinyl silane, and a vinyl alcohol; (iii) at least one polyolefin other than a propylene homopolymer or a propylene-ethylene copolymer; (iv) at least one polyetheramide block copolymer; (v) at least one ionomer; (vi) at least one oxidized polyolefin wax, or mixtures of (1) and (2); and forming the polymer composition into the article.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: February 11, 1997
    Assignee: Ferro Corporation
    Inventors: Deenadayalu Chundury, Rajeev S. Bhatia
  • Patent number: 5596098
    Abstract: Aminoquinones and their use as additives in fluid media for providing corrosion resistance to metals in contact with the fluid medium and their use in preparing copolymers to provide corrosion resistant binder compositions for magnetic information storage media, the copolymers formed, the magnetic information storage media and a method for improving corrosion resistance in magnetic particles are provided.
    Type: Grant
    Filed: July 30, 1993
    Date of Patent: January 21, 1997
    Assignee: University of Alabama
    Inventors: David E. Nikles, Jeng-Li Liang