Patents Examined by Jeffrey T. Smith
  • Patent number: 5830966
    Abstract: Compounds of general formula (I) ##STR1## characterised in that R.sup.1 and R.sup.2 are independently selected from the group consisting of COOR, CN, aryl, substituted aryl, COOH, halogen, C(O)NHR.sup.4, C(O)NR.sup.5 R.sup.6 ;X and Y are independently selected from the group consisting of H, COOH, COOR, CN, R.sup.3 CO--, C(O)NHR.sup.4, C(O)NR.sup.5 R.sup.6, P(O)(OR.sup.7).sub.2 and SO.sub.2 R.sup.8 ; with the proviso that X and Y are not both H; or X and Y together with the carbon atom to which they are attached form a carbocyclic or heterocyclic ring system which can contain oxygen, sulfur or nitrogen atoms; and R, R.sup.3, R.sup.4, R.sup.5, R.sup.6, R.sup.7 and R.sup.8 are various groups;and polymers and copolymers derived from such compounds.
    Type: Grant
    Filed: January 26, 1996
    Date of Patent: November 3, 1998
    Assignees: E. I. du Pont de Nemours and Company, Commonwealth Scientific & Industrial Research Organisation
    Inventors: San Hoa Thang, Ezio Rizzardo, Graeme Moad
  • Patent number: 5830969
    Abstract: Method of making polysiloxanes by ring opening polymerization of dimethylcyclosiloxanes such as hexamethylcyclotrisiloxane (D.sub.3), and cyclosiloxanes such as 1,3,5-trimethyl-1,3,5-tris(3',3',3'-trifluoropropyl) cyclotrisiloxane (F.sub.3) or 1,3,5,7-tetramethyl-1,3,5,7-tetrakis(3',3',3'-trifluoropropyl) cyclotetras iloxane (F.sub.4) in an acid-free system using electrophillic initiators. The reaction mixture is formed under anhydrous conditions and contains (i) the cyclosiloxanes, (ii) a Lewis base such as 2,6-di-tert-butylpyridine which serves as a co-catalyst and an acid scavenger, and optionally (iii) a salt of a strong acid such as tetrabutylammonium trifluoromethane sulfonate. The anhydrous mixture is contacted with a silyl ester of a strong acid such as triflic acid. The anhydrous reaction mixture is agitated at room temperature until a polysiloxane is formed.
    Type: Grant
    Filed: May 28, 1997
    Date of Patent: November 3, 1998
    Assignee: Dow Corning Corporation
    Inventors: Aref Ben Ahmed Jallouli, John Carlton Saam
  • Patent number: 5821295
    Abstract: A resinous composition for two-liquid type water paint crosslinkable at the normal temperature which has a long pot life and which is superior in properties such as hardness, gloss, solvent resistance and water resistance is disclosed. A resinous composition comprises: (A) a colloidal dispersion or emulsion obtained by copolymerizing a monomer mixture comprising a carbonyl group-containing unsaturated monomer, carboxyl group-containing unsaturated monomer and other unsaturated monomers to form a copolymer, neutralizing the copolymer with an alkali, dissolving or emulsifying it into water, and adjusting the pH to above 7; and (B) an easily water soluble dihydrazide compound having from 1 to 5 carbon atoms.
    Type: Grant
    Filed: June 21, 1996
    Date of Patent: October 13, 1998
    Assignee: Kansai Paint Co., Ltd.
    Inventors: Yasuharu Nakayama, Reijiro Nishida
  • Patent number: 5821313
    Abstract: A process for preparing nitrogen-containing copolymers useful as dispersant-viscosity improvers for lubricating oil compositions, additive concentrates and lubricating oil compositions are described.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: October 13, 1998
    Assignee: The Lubrizol Corporation
    Inventors: Matthew R. Sivik, Charles P. Bryant
  • Patent number: 5816493
    Abstract: A thermally expansible composition is provided as well as method of making the composition and actuators and other devices employing the composition. The composition comprises a mixture of silicone elastomer and a thermostatic wax, polymer, alloy or alloy mixture that melts below 400.degree. F. The composition is moldable by any common technique, may be handled at room temperature without heating or refrigeration and can be easily contained in an actuating device without seals other than an anti-extrusion closure seal. This composition can be used in actuators without seals or return springs or other reconsolidating means.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: October 6, 1998
    Assignee: Texan Corporation
    Inventor: Fred L. Pirkle
  • Patent number: 5814706
    Abstract: Novel terpolymers are disclosed which comprise the reaction product of a high molecular weight olefin, such as polybutene or polypropylene, with an unsaturated acid reactant, such as maleic anhydride and a di-or polyunsaturated reactant. The terpolymers are useful as dispersants in lubricating oils and fuels and are also used to prepared polysuccinimides and other post-treated additives useful in lubricating oils and fuels.
    Type: Grant
    Filed: December 23, 1997
    Date of Patent: September 29, 1998
    Assignee: Ethyl Corporation
    Inventors: Daniel Y. F. Yu, Carl A. Mike
  • Patent number: 5814704
    Abstract: A process for recovering a polyphosphazene polyacid or acid salt obtained by hydrolyzing a polyphosphazene having at least one ester moiety present in at least one substituent group. The polyphosphazene having at least one ester moiety present in at least one substituent group is hydrolyzed with a base in an organic solvent in the presence of water. The water is present in an amount effective to induce the agglomeration of particles of the synthesized polyphosphazene polyacid or acid salt, which enhances the separation of the polyphosphazene polyacid or acid salt from a polymer-free liquid organic phase. The polymer-free liquid organic phase then is separated from the polyphosphazene acid or acid salt, whereby the polyphosphazene acid or acid salt is recovered.
    Type: Grant
    Filed: March 4, 1997
    Date of Patent: September 29, 1998
    Assignee: Virus Research Institute, Inc.
    Inventors: Alexander K. Andrianov, Jonathan R. Sargent, Sameer S. Sule
  • Patent number: 5811476
    Abstract: Improved thermoplastic pattern-forming compositions for investment casting processes. The compositions comprise a blend of a thermoplastic pattern-forming material and from about 5 to about 70% by weight of an aqueous gel that is substantially uniformly dispersed throughout the thermoplastic pattern-forming composition. The aqueous gel comprises water and a gellant. The thermoplastic composition may also contain another component in the form of a filler material.
    Type: Grant
    Filed: October 4, 1996
    Date of Patent: September 22, 1998
    Inventor: Paul Solomon
  • Patent number: 5807928
    Abstract: Process for the preparation of ABS which comprises:a) preparing a solution consisting of a diblock linear rubber of the type S-B dissolved in a mixture of monomers comprising styrene and acrylonitrile;b) feeding to the solution of step (a) at least one preformed ABS resin having an average volumetric diameter of the rubber particles contained in the polymeric matrix of more than 1.5 .mu.;c) dissolving the preformed ABS in the solution of step (a);d) feeding in continuous the solution thus obtained to a polymerization reactor for ABS resins;e) polymerizing the final solution to produce an ABS with a multimodal morphology.
    Type: Grant
    Filed: May 6, 1997
    Date of Patent: September 15, 1998
    Assignee: Enichem S.p.A.
    Inventors: Davide Preti, Anna Grazia Rossi, Roberto Nocci, Nicola Vecchini
  • Patent number: 5808103
    Abstract: Disclosed are the Rhodamine B esters of hydroxy C.sub.2 -C.sub.6 lower alkyl acrylates. Specifically, the hydroxy lower alkyl radical is a linear hydroxy lower alkyl radical having the hydroxy group attached to the terminal carbon atom. Also shown are copolymers of diallyldimetyl ammonium chloride which contains from 0.01-2 mole percent of these Rhodamine B esters and their use in treating industrial waters.
    Type: Grant
    Filed: November 21, 1997
    Date of Patent: September 15, 1998
    Assignee: Nalco Chemical Company
    Inventors: William J. Ward, Jeffrey R. Cramm, Peter E. Reed, Brian S. Johnson
  • Patent number: 5804651
    Abstract: This invention discloses heat sensitizable latices and a process for synthesizing heat sensitizable latices. This invention more specifically discloses a process for preparing a heat sensitizable latex which comprises the steps of (1) polymerizing at least one conjugated diolefin monomer in an aqueous polymerization medium by free radical polymerization in the presence of an emulsifier system which is comprised of a fatty ethoxylated monomaleate and optionally an alkyl monomaleate to produce a first latex composition; and (2) adding a water soluble organically modified polysiloxane to the first latex composition to produce the heat sensitizable latex. The present invention further discloses a heat sensitizable latex composition which is comprised of (1) at least one rubbery polymer; (2) water; (3) an emulsifier system which is comprised of a fatty ethoxylated monomaleate and optionally an alkyl monomaleate; and (4) at least one water-soluble organically modified polysiloxane.
    Type: Grant
    Filed: March 24, 1998
    Date of Patent: September 8, 1998
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Fabienne Arlette Francoise Rouviere, Pascale Francine Jeanne Muller
  • Patent number: 5804641
    Abstract: A barrier to protect wood materials for house construction or wooden structures such as houses from humidity, moisture and/or biological attacks, such as wood decaying fungi and termites, is disclosed. The method is to treat wood itself or, preferably, the ground surface under the floor with a liquid containing a synthetic resin emulsion and an anti-fungal and wood-preservative agent and/or a pesticide such as termite-controlling agent, and further, a foaming agent. The barrier contains a selected copolymer of vinyl acetate and a polyurethane polymer.
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: September 8, 1998
    Assignee: Nippon Eisei Center Co., Ltd.
    Inventor: Toru Iwakawa
  • Patent number: 5798402
    Abstract: Compositions and processes for imparting repellency to low surface tension fluids in thermoplastic polymers, said compositions containing compounds of formulae R.sub.f SO.sub.2 (CH.sub.2).sub.n C(O).sub.2 OR, RSO.sub.2 (CH.sub.2).sub.n C(O)OR.sub.f and R.sub.f SO.sub.2 R wherein R.sub.f is F(CF.sub.2).sub.x --(CH.sub.2).sub.m wherein x is 4 to 20 and m is 2 to 6, R is a saturated aliphatic hydrocarbon with an average carbon chain length of 12 to 66 carbons; and n is 1 to 4 are disclosed.
    Type: Grant
    Filed: December 21, 1995
    Date of Patent: August 25, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Patrick Henry Fitzgerald, Kimberly Gheysen Raiford, Edward James Greenwood
  • Patent number: 5795928
    Abstract: A process is provided for preparing an acrylic copolymer latex having improved mechanical and shear stability comprising emulsion polymerizing at least one ethylenically unsaturated monomer having up to 23 carbons in the presence of, by weight based on the total monomer content, a) from about 0.05% to about 5.0% of a protective colloid with a molecular weight of less than 75,000, and b) from about 0.01% to about 1.5% of at least one water soluble free radical polymerization initiator. This latex provides coating manufacturers the flexibility of either eliminating surfactants altogether from coating or to use small amounts thereof.
    Type: Grant
    Filed: November 3, 1995
    Date of Patent: August 18, 1998
    Assignee: Hercules Incorporated
    Inventors: Bernardus J. W. Janssen, Gijsbert Kroon, Dirk Kruythoff, Willemina G. Salomons
  • Patent number: 5795940
    Abstract: Colour concentrate pellets for pigmenting polyvinyl chloride are substantially all of diameter 0.1 to 3 mm and comprise pigment dispersed in a carrier comprising ethylene-vinyl acetate polymer which is ethylene-vinyl acetate copolymer and/or alloy thereof with polyethylene, the polymer having a vinyl acetate content of 13-28% by weight and a melt flow index (as measured by the method of ASTM D1238 using a 2.16 kg weight at 190.degree. C.) of 3.5-150 g/10 minutes, the pellets comprising at least 30% by weight of the pigment and at least 10% by weight of the polymer.
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: August 18, 1998
    Assignee: Cookson Matthey Ceramics PLC
    Inventors: Roy W. J. Pearce, Nigel B. Smith
  • Patent number: 5792822
    Abstract: A transparent plastic material and an optical article formed of the material which have no variation in color, no generation of precipitation, properties to selectively absorb only light of a specific wavelength, selectively block or reduce light of a wavelength which is dazzling to human eyes, and block harmful ultraviolet light. A transparent plastic material includes a polymer obtained by polymerizing one or more polymerizable monomersin the presence of a polymerization initiator or polymerization catalyst, wherein the polymer contains a complex compound of Formula (I):A.sub.2 M(OH)(H.sub.2 O) (I)wherein M denotes Sc, Y, La, Pt, Nd, Pm, Sm, Gd, Dy, Ho, Er, Tm, or Lu; A is a ligand for forming a chelate complex having a structure shown below ##STR1## and containing at least one of an aryl group and a heterocyclic group.
    Type: Grant
    Filed: February 23, 1996
    Date of Patent: August 11, 1998
    Assignee: Seiko Epson Corporation
    Inventors: Toshiyuki Miyabayashi, Jun Kinoshita
  • Patent number: 5789475
    Abstract: Ionomers based on ethylene/unsaturated carboxylic acid copolymers are modified with from 0.5 to 15 weight percent adipic acid. The modified-ionomers have improved melt flow and melt processing behavior over unmodified ionomers having a comparable level of neutralization of acid groups present. Certain mechanical properties are improved, particularly stiffness, abrasion resistance and low temperature izod impact.
    Type: Grant
    Filed: February 18, 1997
    Date of Patent: August 4, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: John Chu Chen
  • Patent number: 5789506
    Abstract: A polymeric monomer (A) having as a main component thereof a (meth)acryl type monomer which is subjected to aqueous suspension polymerization in the presence of a compound (B) which is substantially insoluble in water and sparingly soluble in the polymeric monomer (A). The compound (B) has at least one, preferably two or more, structural units, selected from the group consisting of --SH, --S--S--, --COOH, --NO.sub.2, and --OH. The use of compound (B), in the suspension polymerization of the (meth)acryl type monomer, represses of the production of by-produced minute particles due to sympathetic emulsion polymerization. The suspension polymerization permits production of (meth)acryl type polymer particles having high heat stability and a small range of particle diameters.
    Type: Grant
    Filed: October 28, 1996
    Date of Patent: August 4, 1998
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Hironobu Toribuchi, Nobuaki Urashima, Yoshikuni Mori
  • Patent number: 5770760
    Abstract: Novel aqueous thickener or thixotropic polymers are prepared by the copolymerization of (A) about 15-60 weight percent of a C.sub.3 -C.sub.8 alpha, beta-ethylenically unsaturated carboxylic acid monomer, preferably acrylic or methacrylic acid or a mixture thereof with itaconic or fumaric acid, (B) about 15-80 weight percent of a nonionic copolymerizable C.sub.2 -C.sub.12 alpha, beta-ethylenically unsaturated monomer, preferably a monovinyl ester such as ethyl acrylate or a mixture thereof with styrene, acrylonitrile, vinyl chloride or vinyl acetate, and (C) about 1-30 weight percent of a new and novel nonionic ethylenically unsaturated nonionic biphillic monomer such as tristyrylpoly(ethyleneoxy).sub.x methyl acrylate, to provide a stable aqueous colloidal dispersion at an acid pH lower than about 5.0 but becoming an effective thickener for aqueous systems upon adjustment to a pH of about 5.5-10.5 or higher. These polymers adjusted to a pH of about 5.
    Type: Grant
    Filed: April 2, 1996
    Date of Patent: June 23, 1998
    Assignee: Rhodia Inc.
    Inventor: Fred Robinson
  • Patent number: 5767200
    Abstract: An optical resin, of which the refractive index continuously changes in a specific direction, is produced by filling a polymerization container with a mixed solution containing at least one type of polymerizable monomer or polymerizable monomer sol and at least one type of substance whose solubility parameter differs by 7 (cal/cm.sup.3).sup.1/2 or less and refractive index by 0.001 or more from those of a polymer produced by polymerization of the monomer, and by subjecting the mixture to polymerization reaction by applying heat or energy rays to the container from outside so that the polymerization reaction starts and progresses preferentially from a particular region of the mixture, thus forming a concentration gradient of the substance having different refractive index.The polymerization container may be made of a polymer which swells and dissolves into the mixed solution from an inner wall thereof.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: June 16, 1998
    Inventor: Yasuhiro Koike