Organic Sulfur Compound Contains -s-s- Or -o-o-group Patents (Class 526/223)
  • Patent number: 10566480
    Abstract: Disclosed are a sealing material for solar cell modules and a manufacturing method thereof capable of endowing good transparency and heat resistance to the sealing material for solar cell modules while using a polyethylene-based resin. The disclosed sealing material for solar cell modules uses a polyethylene-based resin with a density of 0.900 g/cm3 or less, and an MFR between 0.1 g/10 min and 1.0 g/10 min. The sealing material is obtained by melt molding a resin composition containing a polyethylene-based resin with density 0.890 g/cm3 or less, and a polymerization initiator contained at 0.02 mass % or more but less than 0.5 mass % of the composition, wherein the density difference of the resin composition before and after the melt molding is within 0.05 g/cm3, and the MFR difference of the resin composition before and after the melt molding is 1.0 g/10 min or greater.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: February 18, 2020
    Assignee: Dai Nippon Printing Co., Ltd.
    Inventors: Ken Murasawa, Satoshi Osone
  • Patent number: 10025181
    Abstract: A polymer comprises the polymerized product of monomers comprising an acid-deprotectable monomer, a base-soluble monomer, a lactone-containing monomer, and a photoacid-generating monomer; a chain transfer agent of the formula; wherein Z is a y valent C1-20 organic group, x is 0 or 1, Rd is a substituted or unsubstituted C1-20 alkyl, C3-20 cycloalkyl, C6-20 aryl, or C7-20 aralkyl; and optionally, an initiator.
    Type: Grant
    Filed: June 21, 2012
    Date of Patent: July 17, 2018
    Assignee: DOW GLOBAL TECHNOLOGIES LLC
    Inventor: John W. Kramer
  • Patent number: 8987396
    Abstract: Polymer polyols having a solids content of greater than 40 wt. %, a total ethylene oxide content of up to 25 wt. %, and a viscosity at 25° C. of less than 15,000 centistokes are produced by reacting (1) a base polyol having active hydrogen atoms with an ethylene oxide content of from 15 to 40 wt. % that has been formed in the presence of a double metal cyanide (DMC) catalyst, (2) one or more unsaturated monomers, (3) at least one radical initiator, optionally (4) a preformed stabilizer and optionally (5) a chain transfer agent. These polymer polyols (PMPOs) are useful in the preparation of polyurethane foams and elastomers.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: March 24, 2015
    Assignee: Bayer MaterialScience LLC
    Inventors: Rick L. Adkins, Jose F. Pazos, Stanley L. Hager
  • Patent number: 8895672
    Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further provided herein are sulfide-terminated polyolefins.
    Type: Grant
    Filed: August 9, 2013
    Date of Patent: November 25, 2014
    Assignee: Chevron Oronite Company LLC
    Inventor: Casey D. Stokes
  • Patent number: 8835565
    Abstract: Preformed stabilizers useful for the production of low viscosity, high solids polymer polyols are produced by free-radical polymerization of: (a) at least one ethylenically unsaturated macromolecule or macromer with (b) at least three different ethylenically unsaturated monomers in the presence of (c) at least one free-radical polymerization initiator, and, optionally, (d) a liquid diluent, and, optionally, (e) a chain transfer agent.
    Type: Grant
    Filed: April 18, 2012
    Date of Patent: September 16, 2014
    Assignee: Bayer MaterialScience LLC
    Inventors: Jiong England, Rick L. Adkins, Brian L. Neal, William Gill
  • Patent number: 8623979
    Abstract: The present invention relates to cement dispersant that is a copolymerization product of a first monomer (A) comprising a carboxylic acid, a second monomer (B) comprising an alkoxylated allyl alcohol sulfate, and, optionally, a third monomer (C) comprising an alkoxylated allyl alcohol. The cement dispersant according to the invention provides improved slump life properties and water reduction properties in cement admixtures.
    Type: Grant
    Filed: August 8, 2007
    Date of Patent: January 7, 2014
    Assignee: GEO Speciality Chemicals, Inc.
    Inventors: Keith A. Blair, Arpad Savoly, Bennie Veal
  • Patent number: 8586687
    Abstract: The present invention has an object to provide a polyalkylene glycol-based polymer having high anti-soil redeposition ability in washing treatment and having high compatibility with surfactants. The polyalkylene glycol-based polymer includes: a structure unit (a) derived from a polyalkylene glycol-based monomer (A) of a specific structure, and a structure unit (b) derived from a carboxyl group-containing monomer (B) at specific ratios.
    Type: Grant
    Filed: December 17, 2010
    Date of Patent: November 19, 2013
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Atsuro Yoneda, Akiko Hemmi, Sachiko Nakanishi, Daisuke Michitaka
  • Publication number: 20130267669
    Abstract: Provided herein are methods for the preparation of telechelic polyolefins via polymerization reaction with a terpene initiator.
    Type: Application
    Filed: June 5, 2013
    Publication date: October 10, 2013
    Inventors: Casey D. Stokes, Young Chang
  • Patent number: 8507641
    Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further provided herein are sulfide-terminated polyolefins.
    Type: Grant
    Filed: February 12, 2013
    Date of Patent: August 13, 2013
    Assignee: Chevron Oronite Company LLC
    Inventor: Casey D. Stokes
  • Patent number: 8383760
    Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further, provided herein are novel sulfide-terminated polyolefins of the formula: wherein R1 is a polyolefin group and R2 is hydrocarbyl; and methods for producing the same.
    Type: Grant
    Filed: February 14, 2012
    Date of Patent: February 26, 2013
    Assignee: Chevron Oronite Company LLC
    Inventor: Casey D. Stokes
  • Patent number: 8383733
    Abstract: The present invention relates to novel polymer polyols which have low viscosities and high hydroxyl numbers, and to a process for the preparation of these novel polymer polyols. These polymer polyols have hydroxyl numbers of ?20, solids contents of about 30 to about 65% by weight and a viscosity that is less than or equal to: be[2.7c]. These comprise the reaction product of a base polyol, a preformed stabilizer and at least one ethylenically unsaturated monomer, in the presence of a free-radical polymerization initiator and at least one polymer control agent. The base polyol has a hydroxyl number of 60 to 1900, a functionality of 1 to 10, and an equivalent weight of 30 to 900.
    Type: Grant
    Filed: October 31, 2011
    Date of Patent: February 26, 2013
    Assignee: Bayer MaterialScience LLC
    Inventors: Rick L. Adkins, Shriniwas S. Chauk
  • Publication number: 20120302657
    Abstract: Composition which contains polymerizable binder and an initiator according to the following Formula I: R1—X—O—O—[Y—O—O—-]nR2??(Formula I) and having a large through-curing depth and a sufficiently long processing time and which cures without the development of high temperatures.
    Type: Application
    Filed: November 14, 2011
    Publication date: November 29, 2012
    Applicant: IVOCLAR VIVADENT AG
    Inventors: Norbert MOSZNER, Ulrich SALZ, Peter BURTSCHER, Robert LISKA, Astrid GUGG, Christian GORSCHE
  • Publication number: 20120296057
    Abstract: In a method for producing a water absorbent resin by drying a particulate hydrogel having a high solid content concentration (of 45% by weight or more, preferably 50% by weight or more, and more preferably 55% by weight or more), a method for efficient drying water absorbent resin having maintained/improved physical properties is provided.
    Type: Application
    Filed: January 20, 2011
    Publication date: November 22, 2012
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventors: Toshihiro Takaai, Shinichi Fujino, Hidenori Wada
  • Patent number: 8148485
    Abstract: In obtaining a water-absorbing resin with high property in high productivity, produced a production method for a water-absorbing resin in high property and stably. Provided is a production method for a water-absorbing resin, comprising: a step for polymerizing an acrylic acid aqueous solution; a step for drying the resultant water-containing gel; a step for pulverizing and classifying the dried substance; and a step for surface cross-linking after classification, wherein a hopper having an inclination angle of a cone part of equal to or larger than 45 degree, and a drawing rate of 30 to 80% is used.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: April 3, 2012
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Kozo Nogi, Kunihiko Ishizaki, Koji Matsumoto
  • Patent number: 8138292
    Abstract: Provided is a production method for the particulate water-absorbing agent, which can contribute to property enhancement, and further improvement of productivity or the like, as well. One example of the production method for the particulate water-absorbing agent relevant to the present invention includes the polymerization step for obtaining a polymer gel; the drying step for drying the polymer gel to obtain a dried substance; the pulverization step for pulverizing the dried substance or the polymer gel to obtain the particulate water-absorbing resin; the classification step for sieving the particulate water-absorbing resin; the granule sizing step for granule sizing the particulate water-absorbing agent obtained from the particulate water-absorbing resin; and the transporting step for transporting the products produced in each of the steps to other steps.
    Type: Grant
    Filed: March 13, 2009
    Date of Patent: March 20, 2012
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Koji Matsumoto, Sumio Okuda, Kunihiko Ishizaki
  • Patent number: 8133954
    Abstract: Provided herein are methods for preparing vinylidene-terminated polyolefins. Further, provided herein are novel sulfide-terminated polyolefins of the formula: wherein R1 is a polyolefin group and R2 is hydrocarbyl; and methods for producing the same.
    Type: Grant
    Filed: October 22, 2008
    Date of Patent: March 13, 2012
    Assignee: Chevron Oronite Company LLC
    Inventor: Casey D. Stokes
  • Patent number: 7985819
    Abstract: The present invention discloses styrene-maleic anhydride copolymers preparations using solventless techniques. The solventless method resulted in reduced amounts of residues, such as unreacted styrene and/or maleic anhydride monomers, which makes the copolymers particularly suitable for bioapplications.
    Type: Grant
    Filed: March 26, 2009
    Date of Patent: July 26, 2011
    Assignee: Exotech Bio Solutions Ltd.
    Inventors: Mircea Dan Bucevschi, Monica Colt
  • Patent number: 7935774
    Abstract: An object of the present invention is to provide a method for producing a particulate water-absorbent polymer particle having remarkably improved long-term color stability, without an adverse effect (such as a delay in polymerization) on synthesis of the particulate water-absorbent polymer. The method includes the steps of polymerizing a monomer aqueous solution (B) containing (i) at least one type of monomer (A) that is capable of forming a particulate water-absorbent polymer by polymerization, (ii) at least one type of crosslinking agent, (iii) at least one type of polymerization initiator and (iv) an organophosphorus compound in an amount of not less than 1 but not more than 100 ppm by mass with respect to the monomer (A) so as to form a hydrogel polymer, and drying the hydrogel polymer.
    Type: Grant
    Filed: July 13, 2009
    Date of Patent: May 3, 2011
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Hiroyuki Ikeuchi, Makoto Nagasawa
  • Patent number: 7776969
    Abstract: This invention relates to novel ethylenically unsaturated macromers, preformed stabilizers prepared from these novel macromers, polymer polyols prepared from either the novel ethylenically unsaturated macromers or the preformed stabilizers, and to processes for the preparation of these compositions.
    Type: Grant
    Filed: December 4, 2006
    Date of Patent: August 17, 2010
    Assignee: Bayer MaterialScience LLC
    Inventor: Rick L. Adkins
  • Publication number: 20090318649
    Abstract: The present invention discloses styrene-maleic anhydride copolymers preparations using solventless techniques. The solventless method resulted in reduced amounts of residues, such as unreacted styrene and/or maleic anhydride monomers, which makes the copolymers particularly suitable for bioapplications.
    Type: Application
    Filed: March 26, 2009
    Publication date: December 24, 2009
    Inventors: Mircea Dan Bucevschi, Monica Colt
  • Publication number: 20090310285
    Abstract: The invention relates to a process for preparing polythiophene dispersions or for in situ deposition of polythiophenes. The dispersion is prepared by oxidative polymerizing of a thiophene or thiophene derivative, wherein an oxidizing agent is used and is at least one organic peroxidic compound excluding diacyl peroxide. The invention also relates to the use of specific organic peroxides as oxidizing agents in the oxidative polymerization of thiophenes. The invention further relates to a process to process a conductive layer and the use of the conductive layer.
    Type: Application
    Filed: September 19, 2007
    Publication date: December 17, 2009
    Applicant: H.C. Starck GmbH
    Inventors: Knud Reuter, Stephen Kirchmeyer, Udo Merker, Peter Wilfried Loevenich, Timo Meyer-Friedrichsen
  • Publication number: 20090208748
    Abstract: According to the present invention, the manufacturing method for the water absorbing resin involves the step of polymerizing a water-soluble unsaturated monomer, 0.06 of 5 mol % of which is composed of an internal crosslinking agent; and the step of drying a water-containing gel which has a thermally decomposing radical initiator content index of 40 to 100 at 100 to 250° C. The water absorbing resin of the present invention contains a water-soluble unsaturated monomer as a repeat unit for a major chain, 90 mol % of the monomer being composed of an acrylic acid and/or salt thereof, the resin having an internal crosslinking structure and exhibiting a weight-average molecular weight Mw of 360,000 to 1,000,000 daltons and an intrinsic viscosity IV of 2.1 to 6.0 dL/g where the weight-average molecular weight Mw and the intrinsic viscosity IV are measured after treatment under set 2 of hydrolysis conditions.
    Type: Application
    Filed: March 20, 2007
    Publication date: August 20, 2009
    Applicant: NIPPON SHOKUBAI CO., LTD.
    Inventors: Kazushi Torii, Hirofumi Shibata
  • Patent number: 7504466
    Abstract: A process for preparing crosslinked polymer particles at high solids levels (i.e., >40 wt %). Also provided is a method for predicting whether a selection of reaction conditions for preparing crosslinked polymer particles will exhibit a potential for forming a gel and a method for predicting whether a selection of reaction conditions will or will not result in the formation of a gel.
    Type: Grant
    Filed: October 6, 2005
    Date of Patent: March 17, 2009
    Assignee: Rohm and Haas Company
    Inventors: Wayne Devonport, Susan J. Fitzwater, Eric G. Lundquist
  • Publication number: 20080287623
    Abstract: The invention relates to the use of alkylphenol disulfide accelerators in butyl and halobutyl compounds.
    Type: Application
    Filed: May 17, 2007
    Publication date: November 20, 2008
    Inventors: Michael B. Rodgers, Nitin K. Tambe, Scott C. Solis, Bharat B. Sharma
  • Publication number: 20080242813
    Abstract: This invention discloses a process for synthesizing a hairy polymer particle which comprises the steps of (1) polymerizing a vinyl aromatic monomer by emulsion polymerization in an aqueous medium to produce core particles, (2) recovering the core particles from the aqueous medium, (3) dispersing the core particles in an organic solvent, (4) adding an organo-lithium compound to the dried core particles in the organic solvent to produce the hairless core initiator, and (5) utilizing the hairless core initiator to initiate the anionic polymerization of a conjugated diolefin monomer in an organic solvent to produce a solution of the hairy polymer particles. The hairy polymer nanoparticles can then be recovered from the organic solvent. These hairy polymer particles are comprised of (1) a core which is comprised of a polymer of a vinyl aromatic monomer and (2) hairs which are polymer chains of a conjugated diolefin monomer, wherein the hairs are covalently bonded to the core.
    Type: Application
    Filed: June 10, 2008
    Publication date: October 2, 2008
    Applicant: The Goodyear Tire & Rubber Company
    Inventors: Lei Zheng, Eric Sean Castner, Thierry Florent Edme Materne
  • Patent number: 7279542
    Abstract: Polymeric micro- and nano-capsules formed of a spherical single hydrophobic polymer, chemically functionalised at their surface so as to comprise hydrophilic moieties thereon are disclosed. The capsules are susceptible of absorbing a perfume and of being optionally coated with an amphiphilic copolymer. They allow the preparation of perfume delivery systems, which provide a slow release of perfuming materials while improving the substantivity of the perfume on a substrate.
    Type: Grant
    Filed: June 7, 2005
    Date of Patent: October 9, 2007
    Assignee: Firmenich SA
    Inventors: Lahoussine Ouali, Djamila Latreche
  • Patent number: 7271214
    Abstract: The present invention relates to cement dispersant that is a copolymerization product of a first monomer (A) comprising a carboxylic acid, a second monomer (B) comprising an alkoxylated allyl alcohol sulfate, and, optionally, a third monomer (C) comprising an alkoxylated allyl alcohol. The cement dispersant according to the invention provides improved slump life properties and water reduction properties in cement admixtures.
    Type: Grant
    Filed: June 23, 2004
    Date of Patent: September 18, 2007
    Assignee: GEO Specialty Chemicals, Inc.
    Inventors: Keith A. Bair, Arpad Savoly, Bennie Veal
  • Patent number: 7214751
    Abstract: The invention relates to a method of preparing a composition of living polymers comprising a non-photoinitiated radical polymerization step using a composition consisting of: at least one ethylenically unsaturated monomer, preferably a methacrylic monomer, at least one disulphide compound having formula (II), i.e. Z1—C(?S)—S—S—C(?S)—Z2; and at least one thermally-activate free radical source which is different from the formula (II) compound.
    Type: Grant
    Filed: August 14, 2002
    Date of Patent: May 8, 2007
    Assignee: Rhodia Chimie
    Inventor: Jean-Marie Catala
  • Patent number: 6916884
    Abstract: The invention concerns a method for preparing a first generation polymer comprising a step which consists in radical polymerization of a composition containing: at least an ethylenically unsaturated monomer a free radical source, and at least a disulfide compound.
    Type: Grant
    Filed: September 11, 2001
    Date of Patent: July 12, 2005
    Assignee: Rhodia Chimie
    Inventor: Mathias Destarac
  • Patent number: 6869998
    Abstract: A dispersant for use with concrete or cement, and a concrete or cement admixture that comprises a cementitious material, water, and the dispersant. The dispersant includes a polymeric derivative of carboxylic acid, and has a sulfur-containing moiety that is covalently bonded thereto. Adding the dispersant to the cementitious material and water improves the rheological properties of the admixture.
    Type: Grant
    Filed: June 23, 2003
    Date of Patent: March 22, 2005
    Assignee: GEO Specialty Chemicals, Inc.
    Inventors: Keith A. Bair, Arpad Savoly, Bennie Veal
  • Patent number: 6852813
    Abstract: In accordance with the method of manufacture described herein, it has been found that by applying a polymerization catalyst or polymerization initiator directly to a liquid-absorbent or liquid adsorbent (hereinafter collectively referred to as “liquid-sorbent”) substrate, preferably a porous geotextile in sheet material form, to form a polymerization-initiating substrate or sheet material, a monomer that is subsequently embedded in the liquid-sorbent substrate will be completely contacted by the polymerization catalyst or polymerization initiator for complete polymerization of the embedded monomer to form embedded polymer solids, without the monomer partially polymerizing before contacting the substrate. It has been found that complete polymerization of the monomer while in contact with the substrate achieves best results in retention of embedded and interlocked polymer solids.
    Type: Grant
    Filed: September 25, 2002
    Date of Patent: February 8, 2005
    Assignee: Amcol International Corporation
    Inventors: Jerald W. Darlington, Jr., Natali A. Dotlich, Craig M. Mattern, Richard Wilson Carriker, Mark William Clarey
  • Patent number: 6844406
    Abstract: The present invention provides novel low molecular weight, high functionality number, polymers. The polymers may be made, for example, by heating (preferably, to a temperature of between about 130° C. and 180° C.) one or more ethylenically unsaturated monomers in the presence of a substantially aprotic solvent system; and maintaining the temperature for a time sufficient to polymerize the monomers to a preferred monomer to polymer conversion percentage of at least about 95 percent by weight. In a presently preferred embodiment, the polymer has a weight average molecular weight between about 900 and 7,000 Dalton and a functionality number of at least 100. The process is also preferably substantially free of chain transfer agents.
    Type: Grant
    Filed: October 4, 2001
    Date of Patent: January 18, 2005
    Assignee: Valspar Sourcing, Inc.
    Inventors: John H. Mazza, Jeffrey Niederst, Thomas R. Mallen
  • Publication number: 20040259982
    Abstract: A dispersant for use with concrete or cement, and a concrete or cement admixture that comprises a cementitious material, water, and the dispersant. The dispersant includes a polymeric derivative of carboxylic acid, and has a sulfur-containing moiety that is covalently bonded thereto. Adding the dispersant to the cementitious material and water improves the rheological properties of the admixture.
    Type: Application
    Filed: June 23, 2003
    Publication date: December 23, 2004
    Inventors: Keith A. Bair, Arpad Savoly, Bennie Veal
  • Publication number: 20040204553
    Abstract: The invention relates to a method of preparing a composition of living polymers comprising a non-photoinitiated radical polymerisation step using a composition consisting of: at least one ethylenically unsaturated monomer, preferably a methacrylic monomer, at least one disulphide compound having formula (II), i.e. Z1—C(═S)—S—S—C(═S)—Z2; and at least one thermally-activate free radical source which is different from the formula (II) compound.
    Type: Application
    Filed: February 23, 2004
    Publication date: October 14, 2004
    Inventor: Jean-Marie Catala
  • Patent number: 6800709
    Abstract: A method has been described of preparing monodisperse polymer particles by free radical polymerization or copolymerization of hydrophobic monomers in a water-based system in the presence of cyclodextrin, characterized in that said free radical polymerization is performed with semi-continuous addition of monomer, wherein said monomer is absent before initiating polymerization, and in that a total solid contents of less than 30% by weight is present in said water-based system, in order to provide monodisperse polymer particles which are very suitable for use in many applications as e.g. in inks or toners, in photonic crystal films, in thermal printing plates for computer-to-plate or computer-to-press applications, in inkjet media, in displays, in photographic films, or as a spacing agent.
    Type: Grant
    Filed: March 6, 2002
    Date of Patent: October 5, 2004
    Assignee: AGFA-Gevaert N.V.
    Inventors: Huub Van Aert, Joachim Storsberg, Helmut Ritter, Christiaan Van Roost
  • Patent number: 6756457
    Abstract: A process for polymerization of vinyl monomers is described comprising polymerizing vinyl monomers in the presence of of an initiating system comprising (i) an organic sulfur compound and (ii) an onium salt catalyst. The present invention provides a novel method for living polymerization of vinyl monomers, which provides a high level of macromolecular control over the polymerization process and which leads to uniform and controllable polymeric products.
    Type: Grant
    Filed: July 16, 2002
    Date of Patent: June 29, 2004
    Assignee: Eastman Kodak Company
    Inventor: Jin-Shan Wang
  • Publication number: 20040059013
    Abstract: The invention relates to a photocurable resin composition comprising: (A) a di or more functional urethane (meth)acrylate compound; (B) a monofunctional (meth)acrylate; (C) a photoinitiator; and (D) a polyoxyalkylene alkyl ether phosphate represented by the following formula (2): 1
    Type: Application
    Filed: July 12, 2002
    Publication date: March 25, 2004
    Inventors: Takayoshi Tanabe, Jiro Ueda, Tetsuya Yamamura, Takashi Ukachi
  • Patent number: 6689851
    Abstract: The subject invention is directed to a rheology-modified ethylene polymer having less than 0.5 weight percent gel, a composition distribution breadth index (CDBI) greater than 50 percent, and a molecular weight distribution (Mw/Mn) of less than 4.0, which is characterized as having improved rheological performance and/or melt strength attributes relative to the unmodified polymer. The subject invention is further directed to polymer blends which comprise the rheology-modified polymers, and to a process for preparing the rheology-modified polymers.
    Type: Grant
    Filed: July 11, 2000
    Date of Patent: February 10, 2004
    Assignee: Dow Global Technologies Inc.
    Inventors: Michael E. Rowland, Robert R. Turley, James J. Hill, Lawrence T. Kale, Kyle G. Kummer, Shih-Yaw Lai, Pak-Wing Steve Chum
  • Publication number: 20040014919
    Abstract: A process for polymerization of vinyl monomers is described comprising polymerizing vinyl monomers in the presence of of an initiating system comprising (i) an organic sulfur compound and (ii) an onium salt catalyst. The present invention provides a novel method for living polymerization of vinyl monomers, which provides a high level of macromolecular control over the polymerization process and which leads to uniform and controllable polymeric products.
    Type: Application
    Filed: July 16, 2002
    Publication date: January 22, 2004
    Applicant: Eastman Kodak Company
    Inventor: Jin-Shan Wang
  • Publication number: 20030187165
    Abstract: The invention concerns a method for preparing a first generation polymer comprising a step which consists in radical polymerization of a composition containing: at least an ethylenically unsaturated monomer a free radical source, and at least a disulfide compound.
    Type: Application
    Filed: March 12, 2003
    Publication date: October 2, 2003
    Inventor: Mathias Destarac
  • Patent number: 6624263
    Abstract: A new polymerization process (atom transfer radical polymerization, or ATRP) based on a redox reaction between a transition metal (e.g., Cu(I)/Cu(II), provides “living” or controlled radical polymerization of styrene, (meth)acrylates, and other radically polymerizable monomers. Using various simple organic halides as model halogen atom transfer precursors (initiators) and transition metal complexes as a model halogen atom transfer promoters (catalysts), a “living” radical polymerization affords (co)polymers having the predetermined number average molecular weight by &Dgr;[M]/[I]0 (up to Mn>105) and a surprisingly narrow molecular weight distribution (Mw/Mn), as low as 1.15. The participation of free radical intermediates in ATRP is supported by end-group analysis and stereochemistry of the polymerization. In addition, polymers with various topologies (e.g.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: September 23, 2003
    Assignee: Carnegie Mellon University
    Inventors: Krzysztof Matyjaszewski, Jin-Shan Wang
  • Publication number: 20030073793
    Abstract: A process for the preparation of polymers is described, wherein at least one first ethylenically unsaturated monomer is subjected to a free radical polymerization in the presence of stable free radicals or sources of stable free radicals and of a compound having at least one free thiol group to give a polymer, and wherein the molar ratio of compound having a free thiol group to stable free radicals is from 0.05 to 1.1.
    Type: Application
    Filed: September 27, 2002
    Publication date: April 17, 2003
    Inventors: David Christie, Sylke Haremza, Susanne Brinkmann-Regel, Roman Benedikt Raether
  • Patent number: 6486281
    Abstract: A process for preparing a high purity vinylpyrrolidone polymer which dissolves clearly in an organic solvent can be provided. The process for preparing a high purity vinylpyrrolidone polymer, wherein vinylpyrrolidone is polymerized by using a redox initiator comprising an organic peroxide and a sulfite, and thereafter the product is contacted with an anion exchange resin to be purified.
    Type: Grant
    Filed: August 24, 2001
    Date of Patent: November 26, 2002
    Assignee: Dai-Ichi Kogyo Seiyaku Co., Ltd.
    Inventors: Akira Kitada, Keiichi Fujise, Itsuko Hamaguchi
  • Patent number: 6344523
    Abstract: The invention provides a method for promoting the curing reactions of an acetylenic oligomer or polymer, characterized in that the oligomer or polymer is cured in the presence of sulfur or an organic sulfur derivative which is capable of lowering the temperature of cure of the oligomer or polymer. The invention also provides a process for producing a polyimide oligomer or polymer containing an aliphatic or aromatic disulfide moiety which is covalently bound to, and forms an integral part of the oligomer or polymer and which is capable of lowering the temperature of cure of the oligomer or polymer, characterised in that a suitable amount of a diamino-disulfide or dianhydride-disulfide, or any suitable derivative or precursor thereof, is introduced into the mixture of aromatic diamines, tetracarboxylic dianhydrides, and the phenylethynyl-substituted amine or anhydride normally used for the reparation of the oligo-imide.
    Type: Grant
    Filed: December 10, 1999
    Date of Patent: February 5, 2002
    Assignees: Commonwealth Scientific and Industrial Research Organization of Campbell, The Boeing Company
    Inventors: David Geoffrey Hawthorne, Jonathan Howard Hodgkin
  • Patent number: 6255422
    Abstract: The invention relates to a process for the polymerization or copolymerization of at least one monomer which can be polymerized or copolymerized by the radical route in the presence of a stable free radical and of an iniferter. The presence of the stable free radical greatly modifies the behavior of the iniferter during the polymerization or copolymerization, so that undesirable reactions are much reduced. It is possible, rapidly and with a high yield, to polymerize or copolymerize in the presence of an iniferter in order to result in a polymer or copolymer with a reduced polydispersity and with a monomodal molecular mass distribution.
    Type: Grant
    Filed: November 19, 1997
    Date of Patent: July 3, 2001
    Assignee: ATOFINA
    Inventors: Denis Bertin, Bernard Boutevin, Pascal Nicol
  • Patent number: 6160070
    Abstract: Disclosed is a process for the preparation of a poly-(meth)acrylate ester, which comprises, upon polymerization of a (meth)acrylate ester by using an organometallic compound ((C.sub.5 Me.sub.5).sub.2 SmMe(thf) or the like) having at least one polymerization initiating site, carrying out the polymerization in the presence of a compound (acetophenone, 4-methyl-2-pentanone or the like), which contains in the molecule thereof a reactive hydrogen atom, as a chain transfer agent. The above-described process makes it possible to control the molecular weight easily, reduce the using amount of the organometallic compound, prevent the coloring of the poly(meth)acrylate ester and improve thermal decomposition resistance.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: December 12, 2000
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Akira Yanagase, Seiji Tone, Toru Tokimitsu, Mitsufumi Nodono
  • Patent number: 5880232
    Abstract: There is provided a process for producing a styrene based polymer by polymerizing a styrene compound, the process including the step of continuously feeding a styrene compound and one or more sulfide compounds to a reaction zone. The sulfide compounds include dithiocarbamate group-containing sulfide compounds, aryl or arylalkyl group-containing sulfide compounds and thiazole group-containing sulfide compounds. The polymerization is carried out under stirring conditions to maintain the composition of the reaction mixture in the reaction zone uniform and at a predetermined conversion within a range of from 40 to 80% by weight. Polymerization reaction mixture is continuously removed from the reaction zone. The styrene based polymer produced is narrow in molecular weight distribution, and excellent in flowability, mechanical strength and heat resistance.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: March 9, 1999
    Assignee: Sumitomo Chemical Company, Ltd.
    Inventors: Masayuki Fujita, Takahiro Ishii
  • Patent number: 5847061
    Abstract: A process for producing polymers having terminal functional group which may be protected, comprises polymerizing a radical-polymerizable monomer with a polymerization initiator comprising at least one member selected from the group (A) consisting of thio-S-carboxylic acids represented by the following general formula (1) and dithiocarboxylic acids represented by the following general formula (2) and at least one member selected from the group (B) consisting of polysulfides represented by the following general formula (3), polysulfides represented by the following general formula (4) and sulfoxides:. ##STR1## wherein R.sup.1 represents a hydrocarbon group which may have a substituent including functional group; ##STR2## wherein R.sup.2 represents a hydrocarbon group which may have a substituent including functional group; ##STR3## wherein R.sup.3 and R.sup.4 each represents a hydrocarbon group which may have a substituent including functional group and n is an integer of 2 or more; andR.sup.5 --(S)m-R.sup.
    Type: Grant
    Filed: November 21, 1995
    Date of Patent: December 8, 1998
    Assignee: Kuraray Co., Ltd.
    Inventors: Kazuhiko Maekawa, Toshiaki Sato
  • Patent number: 5773544
    Abstract: Crystalline polychloroprene compositions comprise mercaptan-modified or xanthogen disulfide-modified 2-chloro-1,3-butadiene homopolymers having gel contents of 5-80 percent by weight. The polymers are prepared by free radical emulsion polymerization at a temperature of 5.degree.-20.degree. C. to a conversion of 70-95 percent in the presence of 2.5.times.10.sup.-4 -5.5.times.10.sup.-4 moles of mercaptan or xanthogen disulfide modifier per mole of 2-chloro-1,3-butadiene.
    Type: Grant
    Filed: January 10, 1997
    Date of Patent: June 30, 1998
    Assignee: Dupont Dow Elastomers
    Inventors: Lance Alan Christell, Richard Misak Tabibian
  • Patent number: RE36618
    Abstract: Polychloroprene latex adhesive compositions which comprise a) mercaptan-modified or xanthogen disulfide-modified 2-chloro-1,3-butadiene homopolymers having gel contents of 5-.[.70.]..Iadd.78.7 .Iaddend.percent by weight, b) 1 to 75 parts by weight of rosin per 100 parts by weight of a), and c) sufficient water to provide a solids content of 25-65 weight percent based on the weight of component a) exhibit excellent heat resistance and green bond strength.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: March 14, 2000
    Assignee: DuPont Dow Elastomers, L.L.C.
    Inventors: Lance Alan Christell, Richard Misak Tabibian