Patents Examined by Jeffrey T. Smith
  • Pressure-sensitive adhesive having excellent heat-resistance, adhesive sheets thereof, and methods for producing them
    Patent number: 5502085
    Abstract: A photopolymerized acrylic pressure-sensitive adhesive having excellent heat-resistance, an adhesive sheet using the adhesive, and methods for producing the adhesive and the adhesive sheet, are disclosed. The pressure-sensitive adhesive sheet having excellent heat resistance comprising a photopolymerization product of a composition comprising;a) 100 parts by weight of monomers comprising from 70 to 100% by weight of a (meth)acrylic acid alkyl ester having from 2 to 14 carbon atoms in the alkyl moiety, and from 30 to 0% by weight of a monoethylenically unsaturated monomer copolymerizable with the (meth)acrylic acid alkyl ester,b) from 0.02 to 20 parts by weight of a radical chain inhibitor,c) up to 5 parts by weight of a polyfunctional (meth)acrylate as a crosslinking agent, andd) from 0.01 to 5 parts by weight of a photopolymerization initiator.
    Type: Grant
    Filed: August 1, 1994
    Date of Patent: March 26, 1996
    Assignee: Nitto Denko Corporation
    Inventors: Masahiro Ohura, Takao Yoshikawa, Yasuyuki Tokunaga, Takaaki Moriyama, Tetsuo Inoue
  • Aqueous polymer dispersion
    Patent number: 5498655
    Abstract: An aqueous polymer dispersion having a solids volume concentration of 50% by volume or more is obtainable by polymerizing radical polymerizable monomers other than vinyl or vinylidene halides by the method of free radical aqueous emulsion polymerization with the addition of an aqueous starting polymer dispersion having a certain diameter distribution of the starting polymer particles present therein by the stream addition process.
    Type: Grant
    Filed: January 17, 1995
    Date of Patent: March 12, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
  • Particulate vinyl polymer and water-base coating composition using the same
    Patent number: 5496904
    Abstract: A particulate vinyl polymer is provided. At least 95 wt. % of its particles have a minor axis A and a major axis B, which are in a relationship of 1.ltoreq.B/A.ltoreq.1.5 and individually range from 30 .mu.m to 400 .mu.m. The polymer has an acid value of from 30 to 150 mg KOH/g. This particulate vinyl polymer is excellent in workability such as the solubility in aqueous medium, and is useful as a raw material for water-base coating compositions having superb dispersion of a pigment and excellent waterproofness.
    Type: Grant
    Filed: October 6, 1994
    Date of Patent: March 5, 1996
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Makoto Moriya, Seiji Nishimura, Yasutaka Doi
  • Low viscosity polymer polyols with improved dispersion stability
    Patent number: 5496894
    Abstract: The present invention provides polymer polyols and a method for preparing polymer polyols which have (1) exceptional dispersion stability, especially at high styrene contents, and (2) substantially smaller particle sizes than polymer polyols having equivalent viscosity. In a preferred embodiment of the present invention, a first reaction product is obtained by feeding the following materials to a first continuous reactor in the presence of a free radical initiator or catalyst: (a) less than about 50 wt. % of a total monomer proportion or monomer mixture, preferably comprising styrene/acrylonitrile at a ratio preferably greater than about 50/50 wt. %; (b) at least about 50 wt. % of a total base polyol proportion; (c) a majority of a precursor stabilizer; and, (d) a polymer control agent (PCA).
    Type: Grant
    Filed: June 10, 1994
    Date of Patent: March 5, 1996
    Assignee: ARCO Chemical Technology, L.P.
    Inventors: Frank E. Critchfield, Donald W. Simroth, Stuart L. Watson
  • Aqueous polymer dispersion
    Patent number: 5496882
    Abstract: An aqueous polymer dispersion with a final solids volume concentration of at least 50% by volume is obtainable by polymerizing at least one radical polymerizable monomer by the method of free radical aqueous emulsion polymerization with the addition of an aqueous dispersion of a starting polymer.
    Type: Grant
    Filed: March 30, 1993
    Date of Patent: March 5, 1996
    Assignee: BASF Aktiengesellschaft
    Inventors: Oral Aydin, Michael Portugall, Josef Neutzner, Walter Maechtle
  • Stabilizers for preparing polymer polyols, and process for preparing polymer polyols
    Patent number: 5494957
    Abstract: A polymer polyol is prepared by polymerizing one or more ethylenically unsaturated monomers in a polyol. A high molecular weight stabilizer having polymerizable ethylenic unsaturation and a low hydroxyl functionality is used, which leads to improved dispersion stability at reduced stabilizer level.
    Type: Grant
    Filed: August 17, 1994
    Date of Patent: February 27, 1996
    Assignee: The Dow Chemical Company
    Inventors: Douglas R. Moore, Keith R. Plowman, Paul L. Neill
  • Low formaldehyde, high gel fraction latex binder
    Patent number: 5494963
    Abstract: A low formaldehyde high gel fraction latex binder is made utilizing a compound having the formula ##STR1## wherein R and R', independently, is an alkyl having from 1 to 10 carbon atoms, and R.sup.4 is hydrogen, or wherein R.sup.3 and R.sup.4, independently is an alkyl, an aromatic, or combinations thereof having from 1 to 10 carbon atoms, or wherein said R.sup.3 and R.sup.4 are connected to form an internal amide, and wherein the isopropenyl group is either in the ortho, meta or para position. The latex binder is generally an emulsion or latex copolymer made from various monomers including at least one or more conjugated dienes having a total of from 4 to 10 carbon atoms with butadiene being preferred and from one or more vinyl-substituted aromatics having from 8 to 14 carbon atoms, with styrene being preferred. The amount of the above formulation compounds is generally from about 0.
    Type: Grant
    Filed: January 4, 1995
    Date of Patent: February 27, 1996
    Assignee: GenCorp Inc.
    Inventor: Peter C. Hayes
  • Ink, ink-jet recording process and apparatus making use of the same
    Patent number: 5492952
    Abstract: Provided is an ink comprising a compound having at least one carbonyl group and a hydrazide compound selected from the group consisting of a styrene-maleic acid resin having at least two hydrazide groups, a polyacrylic acid having at least two hydrazide groups and a compound represented by the formula ##STR1## wherein R represents (CH.sub.2).sub.n or C.sub.6 H.sub.
    Type: Grant
    Filed: March 15, 1994
    Date of Patent: February 20, 1996
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masahiko Tonogaki, Yuko Suga, Akio Kashiwazaki, Aya Takaide
  • Copolymers of ethylene
    Patent number: 5492990
    Abstract: Copolymers of ethylene, a vinyl ester of a tertiary saturated monocarboxylic acid and optionally a further monomer, and a process for making them. The copolymers are suitable for producing films of high mechanical strength and excellent optical properties.
    Type: Grant
    Filed: August 22, 1994
    Date of Patent: February 20, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: John V. Hobes, Wilhelm Zoller
  • Adhesive skin barrier composition for ostomy appliance
    Patent number: 5492943
    Abstract: A pressure sensitive adhesive composition particularly suitable for use as a protective skin barrier material for sealing the faceplate of an ostomy appliance, such as the faceplate of a one-piece or two-piece urostomy or an ileostomy appliance, to skin surfaces surrounding a patient's stoma. The composition includes a blend of two viscoelastic adhesive elastomers, specifically, high molecular weight polyisobutylene and a styrene block copolymer, which, along with a plasticizer (preferably petrolatum) and a suitable tackifier and antioxidant, form a continuous phase in which hydrocolloids such as sodium carboxymethylcellulose and pectin are dispersed. The composition is exceptional for its durability, flexibility and strength, even when saturated, and for its controlled swelling upon hydration.
    Type: Grant
    Filed: June 20, 1994
    Date of Patent: February 20, 1996
    Assignee: Hollister Incorporated
    Inventor: Emil Stempel
  • Copolymers of ethylene
    Patent number: 5492991
    Abstract: Copolymers of ethylene, a vinyl ester of a tertiary saturated monocarboxylic acid and optionally a further monomer, and a process for making them. The copolymers are suitable for producing films of high mechanical strength and excellent optical properties.
    Type: Grant
    Filed: May 26, 1995
    Date of Patent: February 20, 1996
    Assignee: Hoechst Aktiengesellschaft
    Inventors: John V. Hobes, Wilhelm Zoller
  • Plastic compositions with antistatic properties
    Patent number: 5491187
    Abstract: Methods for reducing or eliminating static electric charges on resins by adding to the resins an effective amount of at least one substituted ammonium salt of an alkylbenzene sulfonic acid, the salt having the formula: ##STR1## wherein R is a straight or branched chain alkyl group having from 10 to 14 carbon atoms, R.sub.1 is hydroxyethyl or an alkyl group having from one to six carbon atoms, R.sub.2 and R.sub.3 are the same or different and are hydroxyethyl, an alkyl group having from one to six carbon atoms, or hydrogen, and R.sub.4 is hydrogen or an alkyl group having from one to six carbon atoms, together with resins so produced and compositions additionally containing fatty acids for such use.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: February 13, 1996
    Assignee: Witco Corporation
    Inventors: James J. Ward, William P. Chatham
  • Latex copolymers for paper coating compositions
    Patent number: 5491209
    Abstract: The present invention relates to a copolymer comprising in polymerized form from about 1 to about 15 weight percent of one or more ethylenically unsaturated poly(ethylene glycol) monomers represented by the following formula: ##STR1## where R.sup.1 is an ethylenically unsaturated functional group, R is H, OH or OCH.sub.3, and n is from 3 to 20, and from about 60 to about 99 weight percent of one or more monovinyl aromatic monomers, one or more aliphatic conjugated diene monomers or a mixture thereof. Paper coating compositions comprising this copolymer impart improved sheet gloss and dry pick characteristics to the coated paper.
    Type: Grant
    Filed: March 7, 1994
    Date of Patent: February 13, 1996
    Assignee: The Dow Chemical Company
    Inventors: Bradley J. Helmer, Shirley J. Loughney, Jon MacDonagh-Dumler
  • Process for producing water-base resin dispersion
    Patent number: 5489645
    Abstract: A process for producing a water-base resin dispersion which contains resin particles having a very fine particle diameter as fine as 25 to 100 nm and gives a coating composition excellent in water resistance, alkali resistance and resistance to whitening in hot water, the process being very stable in emulsification and comprising dropwise adding a mixture containing 30 to 100% by weight of said radical-polymerizable ethylenically unsaturated monomer and 20 to 90% by weight of said reactive emulsifier and water to a reactor containing 0 to 70% by weight of said radical-polymerizable ethylenically unsaturated monomer and 10 to 80% by weight of said reactive emulsifier and radical-polymerizing the radical-polymerizable ethylenically unsaturated monomer in the presence of an organic polymerization initiator.
    Type: Grant
    Filed: May 20, 1994
    Date of Patent: February 6, 1996
    Assignee: Toyo Ink Manufacturing Co., Ltd.
    Inventors: Seuchiro Tahara, Tomio Hashimoto, Takako Kanayama
  • Composition and method for recovery of petroleum and gas
    Patent number: 5487425
    Abstract: The present invention provides a composition for recovery of petroleum and gas, which comprises (a) a copolymer having a molecular weight of 100,000 or more, composed of 30-75 mole % of N-vinylpyrrolidone unit, 5-70 mole % of (meth)acrylamide unit and 0-20 mole % of (meth)acrylic acid unit or a salt thereof, (b) a water-soluble aldehyde, (c) a phenol compound, and (d) water. This composition can form a gel in a required gelling time even at high temperatures and even in the presence of bivalent metal ions and accordingly can be used for efficient recovery of petroleum and gas.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: January 30, 1996
    Assignees: Nitto Chemical Industry Co., Ltd., Japan Petroleum Exploration Co., Ltd.
    Inventors: Takamasa Ohno, Keietsu Kato, Yoshiyuki Yamaguchi, Masami Murakami, Shogo Suzuki, Shoichi Kanda, Tsuyoshi Nakagawa
  • Flame retardant brominated styrene graft latex compositions
    Patent number: 5484839
    Abstract: Flame retardant latex compositions are disclosed which include natural or synthetic latex grafted with ring-halogenated, ethylenically unsaturated aromatic monomers. The graft latex is used alone or in combination with non-grafted natural or synthetic latex. The compositions are useful as coatings for a wide variety of applications, including fabric backcoatings, carpetings, paints, adhesives, sealants, caulks, non-woven binders and so on.
    Type: Grant
    Filed: May 18, 1994
    Date of Patent: January 16, 1996
    Assignee: Great Lakes Chemical Corp.
    Inventors: Jin-liang Wang, Nicolai A. Favstritsky
  • Self-lubricating thermoplastic polymer composition
    Patent number: 5482987
    Abstract: A self-lubricating composition containing at least about 70 to about 99.5 weight percent of a thermoplastic polymer and from about 30 to about 0.5 weight percent of a lubricating system, wherein the lubrication system contains high and low molecular weight polyethylenes, polyethylene waxes, metal salts, antioxidants and stabilizers. The composition is suitable for the fabrication of shaped articles, e.g., gears, pulleys, rollers and bearings, which exhibit improved friction and surface wear properties.
    Type: Grant
    Filed: February 28, 1995
    Date of Patent: January 9, 1996
    Assignee: Hoechst Celanese Corporation
    Inventor: Alex Forschirm
  • Cyanoacrylate adhesive compositions
    Patent number: 5480935
    Abstract: Alkyl cyanoacrylate compositions comprising at least one alkyl cyanoacrylate, a biocompatible plasticizer (preferably dioctyl phthalate), and SO.sub.2 as an artionic polymerization inhibitor are provided. These compositions are suitable for topical application to human skin.
    Type: Grant
    Filed: September 1, 1994
    Date of Patent: January 2, 1996
    Assignee: MedLogic Global Corporation
    Inventors: Richard J. Greff, Patrick J. Tighe, Michael M. Byram, Leonard V. Barley
  • Solutions, latexes and carpet coating compositions containing novel associative monomers and polymers
    Patent number: 5478881
    Abstract: Novel mono- and multi-functional non-ionic urethane monomers are prepared from surfactants comprising poly(ethylene oxide)(butylene oxide) copolymers, preferably C.sub.1 -C.sub.4 alkoxy-terminated, monohydric, ethylene oxide/butylene oxide block polymers and monoethylenically unsaturated aliphatic isocyanates. When polymerized with, e.g. acrylic acid or alkyl acrylates, these monomers provide copolymers exhibiting greatly enhanced thickening efficiency.
    Type: Grant
    Filed: April 27, 1995
    Date of Patent: December 26, 1995
    Assignee: National Starch and Chemical Investment Holding Corporation
    Inventors: John M. Wilkerson, III, Daniel W. Verstrat, Milagros C. Barron
  • Method for surface treatment of absorbent resin
    Patent number: 5475062
    Abstract: A method for the surface treatment of an absorbent resin is proposed which notably improves the absorption capacity of the absorbent resin under pressure without impairing safety and hydroscopic flowability. The method comprises adding an organic carboxylic ester of a polyhydric alcohol to the absorbent resin and then heat-treating the resultant mixture.
    Type: Grant
    Filed: January 26, 1994
    Date of Patent: December 12, 1995
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kunihiko Ishizaki, Shin-ichi Fujino, Kinya Nagasuna, Yoshiniko Masuda