Patents Issued in January 14, 2003
  • Dental resin cements having improved handling properties
    Patent number: 6506816
    Abstract: Dental resin cement materials having unique handling properties are provided that comprise a) filler, b) polymerizable resin, and c) a polymeric handling modifier that is dispersed in the polymerizable resin at 25° C. and that has a molecular weight of between about 500 and 100,000. Components a) b) and c) are present in an amount effective to achieve a Viscosity vs Shear Rate Curve that fits a power law model of F(x)=A xB. The correlation value of the material to this curve is greater than 0.85 for both the increasing and decreasing shear rate curves, and the value of B is less than about −0.01. Resin cements are also provided that comprise acid functionality and water, but which do not comprise an acid reactive filler. Such cements may be self etching, thereby avoiding the need to carry out a separate acid etch step.
    Type: Grant
    Filed: July 17, 1997
    Date of Patent: January 14, 2003
    Assignee: 3M Innovative Properties Company
    Inventors: Paula D. Ario, Steven M. Aasen, Brian N. Holmes
  • Fluid composition for forming lustrous carbon during metal casting and process for its preparation
    Patent number: 6506817
    Abstract: A fluid composition additive for foundry casting sands enabling formation of lustrous carbon, including a liquid support and particles of at least one substance other than coal capable of forming lustrous carbon during metal casting.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: January 14, 2003
    Assignee: Huttenes-Albertus France S.A.R.L.
    Inventor: Manfred Buchler
  • Polyester resin compositions for film
    Patent number: 6506818
    Abstract: The polyester composition for films includes, based on 100 parts by weight of a polyester resin, 0.01 to 5 parts by weight of aluminum silicate particles containing aluminum and silica as principal components and an alkali metal. To provide polyester films suitable for magnetic recording media, the polymer composition contains surface- modified aluminum silicate particles and two additional particles distinct in particle diameter. The polyester films thus obtained have excellent abrasion resistance and scratch resistance.
    Type: Grant
    Filed: November 21, 2000
    Date of Patent: January 14, 2003
    Assignee: Kolon Industries, Inc.
    Inventors: Wooseok Choi, Sangbong Park
  • Light weight particulate composite materials with cenospheres as reinforcements and method for making the same
    Patent number: 6506819
    Abstract: This invention provides a particulate composite comprising a polyester resin, a plasticizer, and a plurality of cenospheres. The polyester resin and the plasticizer form a matrix wherein the cenospsheres are distributed nonhomogeneously in the matrix. The nonhomogenous distribution of cenospheres further comprises a continuously varying particle volume fraction along a single dimension.
    Type: Grant
    Filed: November 9, 2000
    Date of Patent: January 14, 2003
    Assignee: The Board of Governors for Higher Education State of Rhode Island and Providence Plantations
    Inventors: Arun Shukla, Venkitanarayanan Parameswaran
  • Method for manufacture of particles for powder coating
    Patent number: 6506820
    Abstract: A method for manufacture of particles for powder coating is disclosed in which the particles are prepared from a suspension obtained from a mixture of a thermosetting resin solution and an aqueous solution containing a water-soluble polymer. The thermosetting resin solution contains A resin, B resin and an organic solvent wherein: (a) 0.5≦{(SP value of the A resin)−(SP value of the B resin)}≧1.5; (b) {(Tg of the A resin)−(Tg of the B resin)}≧10° C.; (C) 40° C.≦(Tg of the A resin)≦100° C., and, 20° C.≦(Tg of the B resin)≦50° C.; and (d) 5/95≦(a ratio in solids weight of the A resin to B resin)≦50/50.
    Type: Grant
    Filed: April 14, 1999
    Date of Patent: January 14, 2003
    Assignee: Nippon Paint Co., Ltd.
    Inventors: Haruhiko Satoh, Yutaka Harada, Atsushi Yamada
  • Self-dispersible hardenable epoxide resins
    Patent number: 6506821
    Abstract: A self-dispersible curable epoxy resin composition containing a reaction product of: (a) 1.0 equivalent of epoxy resin; (b) 0.01 to 1.0 equivalent of polyhydric phenol; and (c) 0.005 to 0.5 equivalent of an amine/epoxy adduct formed by reacting: (i) an aromatic polyepoxide; and (ii) a polyoxyalkylenamine, in an equivalent ratio of from about 1:0.10 to 1:0.28.
    Type: Grant
    Filed: August 7, 2001
    Date of Patent: January 14, 2003
    Assignee: Cognis Deutschland GmbH & Co., KG
    Inventors: Thomas Huver, Vincenzo Foglianisi, Horst Sulzbach, Tamara Leuschner
  • Epoxy resin composition
    Patent number: 6506822
    Abstract: An epoxy resin composition comprising (A) an epoxy resin, (B) a curing agent, and (C) a silicone stress-reducing agent further includes (D) a foam-suppressing composition comprising (D-i) an oil compound consisting of a hydrophobic organopolysiloxane and finely divided silica, (D-ii) a hydrophilic polyoxyalkylene-modified silicone oil, and optionally, (D-iii) a polyoxyalkylene polymer. The epoxy resin composition has the advantages of improved infiltration to semiconductor device-substrate gaps and minimized formation of internal and surface voids.
    Type: Grant
    Filed: July 5, 2001
    Date of Patent: January 14, 2003
    Assignee: Shin-Etsu Chemical Co., Ltd.
    Inventors: Nobuhiro Ichiroku, Miyuki Wakao, Toshio Shiobara
  • Nitrocellulose based coating compositions
    Patent number: 6506823
    Abstract: A curable nitrocellulose based coating composition having four essential components: nitrocellulose, polymerizable reactive diluents whose homopolymers have glass transition temperatures both above and below 25° C. and acrylated urethane. The composition may also contain an initiator whereby thermal or light curing of the composition can be achieved.
    Type: Grant
    Filed: January 4, 2001
    Date of Patent: January 14, 2003
    Assignee: Raffi & Swanson, Incorporated
    Inventors: Elizabeth G. Burns, Charles C. Shearer
  • Thermoplastic compositions comprising starch and other components from natural origin
    Patent number: 6506824
    Abstract: Biodegradable thermoplastic compositions comprising a starch component, a cellulose ester or ether, a plasticizer for the starchy phase and of the cellulose and derivatives, and a compatibilizer agent selected from polymers compatible with the cellulose and or starchy component, grafted with aliphatic or polyhydroxilated chains; copolymers obtained from hydroxy acids and/or diamines with 2-24C and aliphatic or aromatic diisocyanates; copolymers obtained from aliphatic polyesters, polyureas and polyalkylene glycols and aliphatic or aromatic diisocyanates; copolymers obtained from polymers compatible with cellulose ester or ethers and/or the starchy component by grafting starch soluble polyols; polymer capable of complexing starch; starch compatible polyols.
    Type: Grant
    Filed: October 17, 1997
    Date of Patent: January 14, 2003
    Assignee: Novamont S.p.A.
    Inventors: Catia Bastioli, Vittorio Bellotti, Roberto Lombi, Gabriele Perego
  • Aqueous electrophoretic enamels containing solid urea compounds
    Patent number: 6506825
    Abstract: Use of solid, finely divided urea compounds to prevent edge migration when stoving electrophoretically deposited electrodeposition lacquers, and electrodeposition lacquers with a content of 0.1 to 5 wt. % of urea compound, related to resin solids.
    Type: Grant
    Filed: December 12, 2000
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Carmen Flosbach, Hermann Kerber, Klaus-Günter Kerlin, Klausjörg Klein, Bettina Vogt-Birnbrich
  • Polyamide resin composition and process for producing the same
    Patent number: 6506826
    Abstract: A polyamide resin composition which contains 0.5 to 50 wt. % of an apatite type compound and which, when eluted with a phenol solvent and filtered, leaves 1 to 100 parts by weight of residual organic substances per 100 parts by weight of the apatite type compound has high strength and rigidity and is excellent in toughness. Moreover, the composition is reduced in water absorption and warpage and is excellent in rigidity upon water absorption, heat resistance, creep resistance, dimensional stability and moldability. Thus, the composition is suitable for use as an industrial material for producing mechanical parts, electrical/electronic parts, etc.
    Type: Grant
    Filed: April 24, 2000
    Date of Patent: January 14, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Masaaki Aramaki, Katsushi Watanabe
  • Rubber composition and vulcanized rubber composition
    Patent number: 6506827
    Abstract: A rubber composition which contains the following components (A)-(D) and is free from any zinc-containing compounds that would cause trouble at the time of use of the final products: (A): an ethylene-&agr;-olefin copolymer rubber and/or ethylene-&agr;-olefin-non-conjugated diene copolymer rubber, (B): magnesium oxide, (C): carbon black, (D): at least one compound selected from the following compounds (D-1)-(D-3): (D-1): compounds containing a thio group and a carboxylic acid ester group in the molecule, (D-2): compounds containing a phenolic hydroxyl group in the molecule, (D-3): compounds containing an acyl group and an imino group in the molecule, provides vulcanized products including radiator hoses, heater hoses and radiator packings with improved age resistance.
    Type: Grant
    Filed: March 8, 2001
    Date of Patent: January 14, 2003
    Assignee: Sumitomo Chemical Company, Limited
    Inventor: Sadayuki Nakano
  • Resin composition, molded article therefrom, and utilization thereof
    Patent number: 6506828
    Abstract: A resin composition which comprises 100 parts by weight of a synthetic resin and 50 to 1,500 parts by weight of magnesium oxide particles, wherein the magnesium oxide particles satisfy the following requirements (i) to (v): (i) an average secondary particle diameter of 0.1 to 130 &mgr;m, (ii) a BET method specific surface area of 0.1 to 5 m2/g, (iii) a total content of an Fe compound and an Mn compound of 0.01 wt % or less in terms of metals, (iv) an Na content of 0.001 wt % or less, and (v) a Cl content of 0.005 wt % or less, and a molded product formed therefrom. Since the resin composition of the present invention has excellent flame retardancy, heat conductivity and water resistance, it is advantageously used as a material for sealing a heat generating electronic member such as a semiconductor.
    Type: Grant
    Filed: July 20, 2001
    Date of Patent: January 14, 2003
    Assignee: Kyowa Chemical Industry Co., Ltd.
    Inventors: Hitoshi Anabuki, Machiko Yokozeki
  • Rubber composition containing two silicas
    Patent number: 6506829
    Abstract: The present invention relates to a rubber composition comprising (A) an elastomer containing olefinic unsaturation and (B) 35 to 110 phr of silica filler, wherein said silica filler is comprised of (i) 10 to 100 phr of a first silica having a pore size distribution maximum of the aggregates in the first silica ranging from greater than 55 to 400 nm as determined by mercury porosimetry and an average specific surface area ranging from 60 to 135 m2/g as determined by N2 adsorption; and (ii) 10 to 100 phr of a second silica having a pore size distribution maximum of the aggregates in the second silica ranging from 5 to 50 nm as determined by mercury porosimetry and an average specific surface area ranging from 140 to 250 m2/g as determined by N2 adsorption.
    Type: Grant
    Filed: July 25, 2000
    Date of Patent: January 14, 2003
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Thierry Florent Edme Materne, Giorgio Agostini, Friedrich Visel, Uwe Ernst Frank, René Jean Zimmer
  • Antistatic compositions based on polyamide
    Patent number: 6506830
    Abstract: This antistatic polyamide composition, comprising at least one polyamide and a sufficient amount of carbon black to make it antistatic, is characterized by the fact that the carbon black is at least a carbon black that is selected from among those having a specific BET surface area, measured according to ASTM Standard D 3037-89, from 5 to 200 m2/g, and DBP absorption, measured according to ASTM Standard D 2414-90, from 50 to 300 ml/100 g.
    Type: Grant
    Filed: October 6, 2000
    Date of Patent: January 14, 2003
    Assignee: Atofina
    Inventors: Philippe Bussi, Frédérique Pery, Jacques Thomasset
  • Novolac polymer planarization films with high temperature stability
    Patent number: 6506831
    Abstract: A process for forming a planarization film on a substrate that does not smoke or fume on heating includes applying a polymeric solution including a novolac resin having a weight average molecular weight between about 1000 and 3000 amu, which has been fractionated to remove molecules with molecular weight below about 350 amu, a surfactant selected from a group consisting of a non-fluorinated hydrocarbon, a fluorinated hydrocarbon and combinations thereof, and an optional organic solvent to a substrate, followed by heating the substrate.
    Type: Grant
    Filed: December 2, 1998
    Date of Patent: January 14, 2003
    Assignee: Honeywell International Inc.
    Inventors: Nigel Hacker, Todd Krajewski, Richard Spear
  • Process for the preparation of aqueous emulsions of advantageously masked (poly)isocyanate oils and/or gums and/or resins and emulsions obtained
    Patent number: 6506832
    Abstract: The present invention provides stable, high solids, aqueous emulsions of high viscosity masked (poly)isocyanates, water, surface active agents, and, optionally, thickening water-soluble polymers. The emulsions of the present invention are formulated in as little as 20 parts by weight water or less. The present invention further provides processes for forming such emulsions.
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: January 14, 2003
    Assignee: Rhone-Poulenc Chimie
    Inventors: Paul-Joel Derian, Bruno Langlois, Alain Senechal
  • Fluid thickeners comprising neutralized crosslinked polymers of acrylamidoalkylsulonic acids and N-vinylamides
    Patent number: 6506833
    Abstract: Water-soluble or water-swellable polymers, preferably having a particle size no greater than 10 &mgr;m, which, in addition to from 0.01 to 5% by weight of crosslinking structures originating from monomers having at least two olefinic double bonds, comprise, in random distribution, from 1 to 50% by weight of the repeat structural unit (1) and from 49.99 to 98.99% by weight of the repeat structural unit (2), in which R1, R2 and R3 independently of one another are a hydrogen atom or a methyl group, and Z is a C1-C4-alkylene group. These polymers are used as thickeners, preferably in cosmetic or pharmaceutical preparations.
    Type: Grant
    Filed: December 20, 2001
    Date of Patent: January 14, 2003
    Assignee: Clariant GmbH
    Inventors: Peter Brungs, Mattias Löffler
  • Process for producing highly water resistant tackifier resin
    Patent number: 6506834
    Abstract: A highly water resistant tackifier resin comprising an acrylic (co)polymer incorporating therein while taking up at least part of a tackifying component as a raw material on or around seed particles of 0.05 to 15 &mgr;m in average particle size having polar groups on their surfaces. The above tackifier resin can be produced by a process comprising the steps of: dispersing a tackifying component as a raw material, an oil-soluble peroxide or oil-soluble azo initiator and an acrylic monomer in an aqueous medium in which seed particles of 0.05 to 15 &mgr;m in average particle size having polar groups at their surfaces are dispersed; and polymerizing the acrylic monomer while at least part of the tackifying component is incorporated in the acrylic (co)polymer on or around the seed particles so that the seed particles grow.
    Type: Grant
    Filed: January 10, 2001
    Date of Patent: January 14, 2003
    Assignee: Soken Chemical & Engineering Co., Ltd.
    Inventor: Kiyokuni Takashima
  • Polymer blends of polyvinyl butyral
    Patent number: 6506835
    Abstract: A novel composition is disclosed which comprises polyvinyl chloride, an ethylene-based copolymer as a compatibilizer, inorganic fillers and from about 5 to 95 percent by weight of either virgin or recycled/recovered polyvinyl butyral. A process for preparing this novel composition is also provided.
    Type: Grant
    Filed: June 12, 2000
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: George Henry Hofmann
  • Method for producing a polymer reaction product
    Patent number: 6506836
    Abstract: A process for preparing a reaction product (A), comprising the following stage (i): (i) reacting under free-radical conditions a reaction mixture comprising at least one free-radically reactable monomer (a) in the presence of at least one free-radical initiator and of a compound (I) of the formula:  in which R1 to R4 each independently of one another are hydrogen, a substituted or unsubstituted alkyl radical, cycloalkyl radical or arakyl radical, or an unsubstituted or a substituted aromatic hydrocarbon radical, with the proviso that at least two of R1 to R4 are an unsubstituted or a substituted aromatic hydrocarbon radical in aqueous phase.
    Type: Grant
    Filed: July 30, 2001
    Date of Patent: January 14, 2003
    Assignees: BASF Aktiengesellschaft, BASF Coating AG
    Inventors: Wolfgang Bremser, Frank Strickmann, Maximilian Bendix, Wolfgang Paulus, Roman Benedikt Raether, David Christie
  • Gelled aqueous composition comprising a block copolymer containing at least one water-soluble block and one hydrophobic block
    Patent number: 6506837
    Abstract: The invention relates to a gelling aqueous composition comprising block copolymers containing at least one water-soluble block and at least one block predominantly hydrophobic in nature, and forming a viscoelastic gel.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: January 14, 2003
    Assignee: Rhodia Chimie
    Inventors: Mathias Destarac, Mathieu Joanicot, Roland Reeb
  • Modified oxymethylene polymers
    Patent number: 6506838
    Abstract: Modified oxymethylene polymers comprising a linear polymer of oxymethylene repeat units, blocked at one end by at least one terminal group selected from the group consisting of an alkylene oxide as an adduct to alcohol and an alkylene oxide as an adduct to carboxylic acid, the linear polymer excluding the terminal group having a number average molecular weight of 10,000-500,000 and the modified oxymethylene polymer having a molecular weight distribution (Mw/Mn) of not more than 2.5, obtained by anionic polymerization of formaldehyde and the alkylene oxide as an adduct to alcohol and/or carboxylic acid. The present modified oxymethylene polymers can give moldings with improved repeated impact resistance at the welded parts and controlled smell generation, and improved sliding characteristics, wherein the sliding characteristics are further improved upon combination with an olefinic polymer.
    Type: Grant
    Filed: October 25, 2000
    Date of Patent: January 14, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventor: Toshiharu Seyama
  • Elastomer composition
    Patent number: 6506839
    Abstract: An elastomer composition obtained by crosslinking 1-99 parts by weight of a crosslinkable rubber-like polymer (A) and 1-99 parts by weight of a polypropylene resin (B) [the total amount of (A) and (B) being 100 parts by weight], where (B) is a crosslinking type polypropylene resin, has a flexural modulus of 100-10000 kgf/cm2 as specified in JIS K6758 and has a melting point peak in the range of 100-150° C. in differential scanning calorimetry (DSC), the melting point peak calorie being in the range of 10-600 J/g, especially the above elastomer composition wherein (A) has a crosslinking degree of 1-95% and a swelling degree of 3-100.
    Type: Grant
    Filed: October 13, 2000
    Date of Patent: January 14, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Hajime Nishihara, Shinichi Shibayama
  • Process for producing thermoplastic resin composition
    Patent number: 6506840
    Abstract: A process for producing a succinimide resin composition is provided which comprises reacting a maleic anhydride-olefin type copolymer constituted of 40-60 mol % of maleic anhydride units, 60-40 mol % of olefin units, and 0-20 mol % of a copolymerizable monomer units with one or more amine compounds for imide formation in the presence of a second polymer other than the succinimide resin. This process improves the productivity by lowering the torque in the extrusion reaction, giving a succinimide copolymer resin composition having low yellowness and high transparency with high production efficiency.
    Type: Grant
    Filed: April 16, 2001
    Date of Patent: January 14, 2003
    Assignee: Tosoh Corporation
    Inventors: Takeshi Harunari, Yoshiki Uchida, Toru Doi
  • Composition having improved thermomechanical properties, and a method of cross-linking it
    Patent number: 6506841
    Abstract: The present invention relates to a composition that is extrudable and cross-linkable in air. The composition that is extrudable and cross-linkable in air comprises a mixture of a copolymer with an ethylenically-unsaturated compound and an unsaturated ester, a hydrolizable silane compound having no ethylenic unsaturation containing functional groups, and a thermoplastic polymer having no functional groups, said functional groups of the ester being selectively reactive with the functional groups of the silane compound. Such a composition is used to fabricate a material for insulating or sheathing a power cable, in particular a medium-voltage cable or a cable for working at a voltage of less than 20 kV. The invention also provides method enabling said composition to be cross-linked and power cables including insulation and/or a sheath containing the composition obtained by the method.
    Type: Grant
    Filed: May 4, 2001
    Date of Patent: January 14, 2003
    Assignee: Nexans
    Inventors: Lionel Fomperie, Madeleine Prigent
  • Rheology-modified thermoplastic elastomer compositions and articles fabricated therefrom
    Patent number: 6506842
    Abstract: Rheology-modified thermoplastic elastomer compositions are prepared by peroxide modification of a melt blend of an ethylene/&agr;-olefin polymer or a diene-modified ethylene/&agr;-olefin polymer and a high melting polymer such as polypropylene or a propylene/&agr;-olefin copolymer. The resulting compositions have an elastomeric phase, a non-elastomeric phase and certain physical properties that exceed those of a like composition that is not rheology-modified. The compositions can be used to make a variety of articles of manufacture via conventional procedures.
    Type: Grant
    Filed: November 14, 1997
    Date of Patent: January 14, 2003
    Assignee: DuPont Dow Elastomers L.L.C.
    Inventors: Henry George Heck, Deepak Rasiklal Parikh, Laura Bauerle Weaver, James Robert Bethea, Larry Alan Meiske, Michael Francis Martin
  • Thermosetting powder coating composition
    Patent number: 6506843
    Abstract: To provide a thermosetting powder coating composition which comprises a powder of a composite resin comprising a vinylidene fluoride polymer having crosslinkable functional group and a methyl methacrylate polymer and having a melt flow rate of 1 to 1,000 g/10 min when measured at 130° C. at a load of 2.1 kg. The coating composition has advantages that the preparation thereof is easy because pulverization can be carried out at room temperature as well as at low temperatures, the composite resin has excellent compatibility with various curing agents and the composition gives a coating film having excellent properties.
    Type: Grant
    Filed: April 6, 2001
    Date of Patent: January 14, 2003
    Assignee: Dajkin Industries, Ltd.
    Inventors: Nobuhiko Tsuda, Takahiro Kitahara, Ryuji Iwakiri, Masaru Nagato, Ryoichi Fukagawa, Go Nagai
  • Trifunctional olefinic-capped polymers and compositions that include such polymers
    Patent number: 6506844
    Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.
    Type: Grant
    Filed: August 21, 2002
    Date of Patent: January 14, 2003
    Assignee: Lord Corporation
    Inventor: Robin F. Righettini
  • Method of preparing rubber substrate
    Patent number: 6506845
    Abstract: A method of preparing rubber substrate is provided. In the method, 50 to 95 parts by weight of conjugated diene monomer is first-polymerized, until the resulting first rubber substrate has gel content of 5 to 70 wt %. Thereafter, the first rubber substrate is second-polymerized with 5 to 50 parts by weight to obtain a second rubber substrate. The obtained second rubber substrate has higher gel content in core than outer layer.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: January 14, 2003
    Assignee: LG Chemical, LTD
    Inventors: Keun-hoon Yoo, Jae-ho Lee, Geon-soo Kim, Chan-hong Lee
  • Method for producing impact-resistant modified thermoplastic moulding materials
    Patent number: 6506846
    Abstract: A process prepares impact-modified thermoplastic molding compositions which comprise a soft phase made from a rubber dispersed in a hard matrix composed of vinylaromatic monomers, where the hard matrix is prepared by anionic polymerization in the presence of a metal alkyl compound or a metal aryl compound of an element of the second or third main group, or of the second subgroup, of the Periodic Table.
    Type: Grant
    Filed: July 6, 2000
    Date of Patent: January 14, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Christian Schade, Hermann Gausepohl, Wolfgang Fischer, Rainer Moors, Volker Warzelhan
  • Controlling the molecular weight of graft copolymers using polymerizable chain transfer agents
    Patent number: 6506847
    Abstract: The molecular weight of a graft copolymer is reduced by carrying out the following steps in a non-oxidizing atmosphere: (1) treating a propylene polymer material with an organic compound that is a free radical polymerization initiator, (2) treating the propylene polymer material with about 2 to about 240 parts per hundred parts of the propylene polymer material, of at least one vinyl-substituted grafting monomer in the presence of about 0.5% to about 5% of a polymerizable chain transfer agent that is a derivative of allyl alcohol, and (3) removing any unreacted monomer, decomposing any unreacted initiator, and deactivating any residual free radicals in the material.
    Type: Grant
    Filed: August 8, 2001
    Date of Patent: January 14, 2003
    Assignee: Basell Poliolefine Italia S.p.A.
    Inventor: Cheng Q. Song
  • Rheology modification of elastomers
    Patent number: 6506848
    Abstract: The present invention includes a process of preparing a coupled polymer comprising heating an admixture containing (1) at least one elastomer comprising ethylene and at least one comonomer which is selected from alpha olefins having at least 3 carbon atoms, dienes and combinations thereof and (2) a coupling amount at least one poly(sulfonyl azide) to at least the decomposition temperature of the poly(sulfonyl azide) for a period sufficient for decomposition of at least 80 weight percent of the poly(sulfonyl azide) and sufficient to result in a coupled polymer having a gel content of less than 2 weight percent. The invention includes compositions comprising the reaction product formed by the inventive process. The invention additionally includes articles which comprise a composition of the invention particularly when the article is formed from a melt of the composition.
    Type: Grant
    Filed: October 29, 2001
    Date of Patent: January 14, 2003
    Assignee: The Dow Chemical Company
    Inventors: Wendy D. Hoenig, Teresa Karjala, Che-I Kao, Clark H. Cummins, Michael J. Mullins, H. Craig Silvis, Thoi H. Ho
  • Rubber composition and pneumatic tire
    Patent number: 6506849
    Abstract: There are provided a rubber composition having a high modulus of elasticity and a good workability, and a pneumatic tire. A rubber composition comprising at least one of natural rubber and synthetic diene rubbers as a rubber ingredient, at least one maleimide compound, and at least one nitrogen-containing compound selected from the group consisting of polyaniline, hydrazide, and amine compound is used in a tread.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: January 14, 2003
    Assignee: Bridgestone Corporation
    Inventors: Masahiro Hojo, Yukitoshi Ajiro, Kentaro Fujino, Shunji Baba
  • Polyoxymethylene copolymer and composition thereof
    Patent number: 6506850
    Abstract: A polyoxymethylene copolymer having a melting point of 167° to 173° C. and containing a low molecular weight polyoxymethylene copolymer in an amount of not higher than 5000 ppm, and a composition thereof. The copolymer is obtainable by subjecting unstable terminal groups to heat treatment in the presence of 0.05 to 50 ppm by weight of a quaternary ammonium compound. Further, the above composition is used for working parts such as a gear and a cam; apparatuses for image, music and telecommunication; interior and exterior parts for an automobile; and the like.
    Type: Grant
    Filed: February 21, 2001
    Date of Patent: January 14, 2003
    Assignee: Asahi Kasei Kabushiki Kaisha
    Inventors: Noritaka Tanimura, Atushi Nanasawa
  • Golf ball comprising saturated polyurethanes and methods of making same
    Patent number: 6506851
    Abstract: A golf ball comprising a core and a cover layer wherein the cover is formed of a polyurethane composition comprising a saturated prepolymer comprising an initiated polycaprolactone and a saturated diisocyanate, and a curing agent.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: January 14, 2003
    Assignee: Acushnet Company
    Inventor: Shenshen Wu
  • Polyester resin and process for producing molded product thereof
    Patent number: 6506852
    Abstract: A method for producing a high molecular weight polyester having swell of 1-200 percent is described. In the method, a mixture consisting of (a) 100 parts by weight of a linear saturated polyester; (b) 0.3˜10 parts by weight of a mixture, as a coupling agent, which is composed of (1) 0-100 percent by weight of a bifunctional epoxide ingredient containing 2 epoxide groups per molecule and (2) 100-0 percent by weight of a polyfunctional epoxide ingredient containing 3 and more epoxide groups per molecule; and (c) 0.01˜5 parts by weight of metal salt of carboxylic acid as a catalyst for coupling reaction, is heated at a temperature higher than a melting point of said polyester resin.
    Type: Grant
    Filed: September 12, 2001
    Date of Patent: January 14, 2003
    Assignee: DJK Techno Science Laboratories, Inc.
    Inventors: Susumu Yoshimura, Takashi Tanabe, Katsuya Tokutomi, Takashi Fujimaki
  • Copolymer comprising isophthalic acid
    Patent number: 6506853
    Abstract: A substantially soluble solution of isophthalic acid in a glycol can be prepared and contacted with terephthalic acid, its ester, its oligomer, or combinations of two or more thereof. The solution can be used to incorporate isophthalic acid into polyester for bottle resins and fiber.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Jiwen F Duan
  • Inhibiting scale in vinyl monomer polymerization
    Patent number: 6506854
    Abstract: Disclosed is a solution that comprises (A) a solvent; (B) about 0.001 to about 20 wt % of a terpolymer that comprises the condensation reaction product of (1) an aromatic compound that contains a benzene or naphthalene ring substituted with the group OR or SR, where R is hydrogen, alkyl from C1 to C15, or aryl, alkaryl, or aralkyl from C6 to C15; (2) about 0.1 to about 10 moles of a carbonyl compound per mole of said aromatic compound; and (3) about 0.1 to about 10 moles of a thiourea per mole of said aromatic compound (C) about 1 to about 5 wt % of a base; (D) about 0.1 wt % to saturation of a salt; and (E) 0 to about 20 wt % of an alcohol. Also disclosed is a method of making the terpolymer in the absence of an acid catalyst and a method of inhibiting the formation of scale on reactor components in contact with polymerizing vinyl chloride monomer.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: January 14, 2003
    Assignee: Occidental Chemical Corporation
    Inventors: Ramesh Krishnamurti, Sandor Nagy, Qi Wang, Habib Hichri
  • Fluidized bed reactor with asymmetric gas inlet
    Patent number: 6506855
    Abstract: Process for polymerizing one or more olefinic monomers in a fluid-bed reactor which is bounded at the bottom by a gas-distributing plate containing apertures, comprising the supply of a gas to the reactor through the gas-distributing plate and optionally the supply of a liquid to the reactor, in which the average rate at which the gas is supplied to the reactor is higher in a first part of the gas-distributing plate whose area equals half that of the gas-distributing plate than the average rate at which the gas is supplied in a second part covering the area of the gas-distributing plate that lies outside the first part and reactor suitable for this process.
    Type: Grant
    Filed: November 17, 2000
    Date of Patent: January 14, 2003
    Assignee: DSM N.V.
    Inventors: Stanislaus M. P. Mutsers, Paul J. Diepen
  • Transition metal catalyzed polymerization of olefinic monomers in a water-containing polymerization medium
    Patent number: 6506856
    Abstract: Polymers based on monomers having a C—C double bond and/or C—C triple bond are prepared by polymerization of these monomers in the presence of a catalyst system comprising as active constituents a transition metal compound of an early transition metal and, if desired, a cation-forming compound B) and, if desired, further components C), wherein the polymerization mixture contains at least 30% by weight of water.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: January 14, 2003
    Assignee: BASF Aktiengesellschaft
    Inventors: Lambertus Manders, Marc Oliver Kristen, Alexander Haunschild, Michael Geprägs
  • Bridged metallocenes for olefin copolymerization
    Patent number: 6506857
    Abstract: The invention is directed to bridged metallocene catalyst complexes that are sufficiently soluble in aliphatic solvents to be particularly suitable for solution olefin polymerization processes such that olefin copolymers can be prepared with high molecular weights and catalyst activities particularly at high polymerization reaction temperatures. More specifically, the invention particularly relates to a polymerization process for ethylene copolymers having a density of about 0.850 to about 0.940 comprising contacting, under solution polymerization conditions at a reaction temperature at or above 60° C. to 250° C.
    Type: Grant
    Filed: March 7, 2002
    Date of Patent: January 14, 2003
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventor: Francis C. Rix
  • Olefin polymerization catalyst material and process for its preparation
    Patent number: 6506858
    Abstract: A process for the preparation of a catalyst material and the resultant catalyst material. The process comprises the steps of: (a) treating a particulate support material with an alkylating agent; (b) contacting the alkylating agent treated support material with a procatalyst; optionally (c) contacting the support material with an ionic catalyst activator, and optionally (d) recovering the catalyst-carrying support material. The process allows the simple and effective alkylation of procatalysts, such as metallocene procatalysts. The procatalyst comprises at least one triaza containing ligand.
    Type: Grant
    Filed: April 21, 2000
    Date of Patent: January 14, 2003
    Assignee: Borealis A/S
    Inventors: Hikka Knuuttila, Kallee Kallio, Ove Andell
  • Polymerization using late transition metal catalyst complexes formed in situ
    Patent number: 6506859
    Abstract: The invention is directed towards the formation of polymers and copolymers using late transition metal polymerization catalyst complexes which are formed in situ. In the first process step of the instant invention, a composition having the formula MXZn is simultaneously contacted with a ligand and an activating cocatalyst.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: January 14, 2003
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Abhimanyu O. Patil, Robert T. Stibrany, Stephen Zushma, Enock Berluche, Donald N. Schulz
  • Regio-regular copolymer and methods of forming same
    Patent number: 6506860
    Abstract: A new and novel linear, regio-regular vicinal functionalized polymer methods of forming the same are described. The polymer has a linear hydrocarbon polymer backbone with vicinal functional groups having oxygen and/or nitrogen atom containing groups, such as hydroxy, carboxylic acid or ester, carbonyl acetate, amide, nitrile and the like, pendent from the polymer backbone chain in a regio-regular manner.
    Type: Grant
    Filed: September 28, 2000
    Date of Patent: January 14, 2003
    Assignee: Cryovac, Inc.
    Inventors: Donald Albert Bansleben, Truc-Chi Thi Huynh-Tran, Rusty Lew Blanski, Paul Anthony Hughes, William Peyton Roberts, Robert Howard Grubbs, Galen Richard Hatfield
  • Polymerization of olefins
    Patent number: 6506861
    Abstract: Olefins are polymerized by novel transition metal complexes of selected iminocarboxylate and iminoamido ligands, sometimes in the presence of cocatalysts such as alkylaluminum compounds or neutral Lewis acids. Olefins which may be (co)polymerized include ethylene, &agr;-olefins, and olefins containing polar groups such as olefinic esters for example acrylate esters. Also described are certain “Zwitterionic” transition metal complexes as polymerization catalysts for making polar copolymers. The resulting polymers are useful as thermoplastics and elastomers.
    Type: Grant
    Filed: May 31, 2001
    Date of Patent: January 14, 2003
    Assignee: E. I. du Pont de Nmeours and Company
    Inventors: Lin Wang, Lynda Kaye Johnson, Alex Sergey Ionkin
  • Process for the preparation of a diene elastomer by anionic polymerization
    Patent number: 6506862
    Abstract: The present invention provides a process for the preparation of a diene elastomer having a reduced amount of vinyl linkages, by anionic polymerization of one or more monomers comprising at least one conjugated diene monomer. The process for preparing the diene elastomer having a reduced amount of vinyl linkages comprises anionically polymerizing one or more monomers comprising at least one conjugated diene monomer in a polymerization medium comprising a hydrocarbon solvent, a polar agent comprising one or more heteroatoms and a monolitiated or polylithiated organolithiated initiator, wherein an organometallic complex of the formula LiAl(R)3(R′), in which Li is a lithium atom, Al is an aluminum atom, and R and R′ are each an alkyl, cycloalkyl or aryl group, is added to the polymerization medium to produce the diene elastomer having a reduced amount of vinyl linkages.
    Type: Grant
    Filed: October 15, 2001
    Date of Patent: January 14, 2003
    Assignee: Michelin Recherche et Technique S.A.
    Inventors: Jean-Luc Cabioch, Jean-Noël Gorce
  • Esters of 3-(2-furyl)-2-propenoic acid with diols
    Patent number: 6506863
    Abstract: Esters of 3-(2-furyl)-2-propenoic acid with diols having the general formula A2X, in which A is a 3-(2-furyl)-2-propenoate group and X is a C1-C6 alkylene group. The said esters are used as crosslinking agents in processes for crosslinking polymers.
    Type: Grant
    Filed: December 14, 2001
    Date of Patent: January 14, 2003
    Assignee: Basell Poliolefine Italia S.p.A.
    Inventors: Francesco Romani, Vittorio Braga
  • Polymerizable composition of allyl functional monomers
    Patent number: 6506864
    Abstract: Describes a polymerizable composition of (a) a first allyl functional monomer, which is selected such that a substantially completely cured polymerizate of the first allyl functional monomer has a 15 second Barcol 934 hardness of at least 40, and (b) a second allyl functional monomer selected from polyether diol bis(allyl carbonate), polylactone diol bis(allyl carbonate) and mixtures thereof. The second allyl functional monomer is present in the composition in an amount to provide a substantially completely cured polymerizate having: (i) improved organic photochromic substance incorporation relative to a substantially completely cured polymerizate of the composition free of monomer (b); and (ii) heat distortion temperature of at least 40° C.
    Type: Grant
    Filed: August 1, 2000
    Date of Patent: January 14, 2003
    Assignee: PPG Industries Ohio, Inc.
    Inventors: Randy E. Daughenbaugh, Robert D. Herold
  • Monomeric neodymium carboxylate and its use in polymerization of conjugated diene
    Patent number: 6506865
    Abstract: The invention is related to a novel compound represented by NdHA4 wherein A is a carboxylate, and to a diene polymerization catalyst using the novel compound. NdHA4 has monomeric structure and does not contain water, bases and salts. NdHA4 is mixed with a halogen compound and an organic metal compound to prepare a catalyst system. The catalyst system in the polymerization of 1,3-butadiene (BD) or isoprene produces high cis polydiene with a high activity (100 g BD/4.0×10−5 mole Nd) and without gel formation. The polydiene thus obtained is useful for tires and golf balls and as a polystyrene modifier.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: January 14, 2003
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Gwang Hoon Kwag, Seung Hwon Lee, Young Chan Jang, A Ju Kim