Carbon Disulfide Or Hydrogen Sulfide Is Reactant Patents (Class 528/387)
  • Patent number: 10538629
    Abstract: Provided are a device for continuously producing poly(arylene sulfide) (hereinafter, referred to as PAS) and a method for continuous PAS production with which resource savings, energy savings, and a reduction in equipment cost are rendered possible. The device for continuous PAS production according to the present invention includes a housing chamber for housing a plurality of reaction cells; wherein the housing chamber is supplied with at least an organic amide solvent, a sulfur source, and a dihalo aromatic compound. In the reaction cells, the sulfur source is polymerized with the dihalo aromatic compound in the organic amide solvent to form a reaction mixture. The reaction cells communicate with each other through a gas phase within the housing chamber. The reaction cells are sequentially connected, and the reaction mixture sequentially moves to each reaction cell.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: January 21, 2020
    Assignee: KUREHA CORPORATION
    Inventors: Michihisa Miyahara, Kenji Suzuki, Hiroshi Sakabe
  • Patent number: 9340715
    Abstract: The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described.
    Type: Grant
    Filed: August 7, 2015
    Date of Patent: May 17, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Michael S. Matson, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright, Mitchell D. Refvik, Eric J. Netemeyer
  • Patent number: 9340717
    Abstract: The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described.
    Type: Grant
    Filed: August 11, 2015
    Date of Patent: May 17, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Michael S. Matson, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright, Mitchell D. Refvik, Eric J. Netemeyer
  • Patent number: 9340716
    Abstract: The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: May 17, 2016
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Michael S. Matson, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright, Mitchell D. Refvik, Eric J. Netemeyer
  • Patent number: 9200181
    Abstract: A uniformly premixed sealant is extruded into a packaging form and allowed to pressure equilibrate prior to freezing. Upon warming the sealant begins to cure. The storage of the preformed sealant formulation under cold conditions arrests the activity of cure catalysts and accelerators mixed therethrough. The sealant is readily extruded into a preform shape containing a lightweight filler. A release film is provided to avoid contact with the sealant preformed in a shape during application to a substrate.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: December 1, 2015
    Assignee: 3M Innovative Properties Company
    Inventors: Jonathan D. Zook, Dewey L. Mullins, II, Stephane E. Pyrek, David W. A. Jordan
  • Patent number: 9133370
    Abstract: The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described.
    Type: Grant
    Filed: May 10, 2013
    Date of Patent: September 15, 2015
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Michael S. Matson, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright, Mitchell D. Refvik, Eric J. Netemeyer
  • Patent number: 8981041
    Abstract: A production process of a poly(arylene sulfide) (PAS), including a polymerization step of forming a PAS from a sulfur source that is an alkali metal (hydro)sulfides and a dihalo-aromatic compound in an organic amide solvent; a separation step of PAS particles; a countercurrent washing step that is a step of washing the PAS particles with water and/or an organic solvent, wherein a downward current of a PAS particle-containing aqueous slurry is continuously brought into countercurrent contact with an upward current of a washing liquid; a PAS particle re-separation step of capturing a washing waste liquid by a PAS particle re-separating unit, in which a micro-slit filter has been installed, and then re-separating the PAS particles from the micro-slit filter, preferably using a backwashing unit, to discharge them; and a collecting step of the PAS particles discharged, and a production apparatus of a poly(arylene sulfide).
    Type: Grant
    Filed: July 6, 2011
    Date of Patent: March 17, 2015
    Assignee: Kureha Corporation
    Inventors: Takayuki Kimura, Tomoyoshi Koizumi, Mitsuhiro Matsuzaki
  • Patent number: 8648155
    Abstract: The present description discloses a polymeric composition which is a melt-processed alloy comprised of (a) a polyarylene sulfide resin, (b) a polyaryl-ether-ketone resin, and a reactive compound which results in (c) a graft copolymer of the polyarylene sulfide resin and/or the polyaryl-ether-ketone resin in addition to the starting resins. Exemplary melt-processed polymeric compositions can be made by reacting an alkoxy silane with the polyarylene sulfide resin and/or the polyaryl-ether-ketone resin to produce a graft copolymer of a portion of one or both of the resins, sufficient to render the composition uniform and homogeneous. It is normally preferred for the exemplary organosilane compound, to be an amino silane. The subject invention further reveals an insulated wire comprising (1) an electrical conductor and (2) a layer of the melt-processed alloy composition; and fiber reinforced composites comprising fibers substantially fully impregnated with the alloy polymeric composition.
    Type: Grant
    Filed: April 27, 2012
    Date of Patent: February 11, 2014
    Assignee: Ticona LLC
    Inventors: Manoj Ajbani, Andrew Auerbach, Ke Feng
  • Patent number: 8575293
    Abstract: According to the present invention, a resin compound for optical material, comprising (a) an episulfide compound represented by a specific structural formula, (b) a xylylenedithiol compound and (c) a xylylenediisocyanate compound can be provided. In a preferable embodiment of the present invention, a resin compound for optical material having superb optical properties, a high density and a high thermal resistance can be provided. Also according to the present invention, an optical material obtained by curing the above-described resin compound can be provided.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: November 5, 2013
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Hiroshi Horikoshi, Motoharu Takeuchi
  • Patent number: 8461293
    Abstract: The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described.
    Type: Grant
    Filed: August 3, 2010
    Date of Patent: June 11, 2013
    Assignee: Chevron Phillips Chemical Company LP
    Inventors: Michael S. Matson, Mitchell D Refvik, Eric J Netemeyer, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright
  • Publication number: 20130022808
    Abstract: Disclosed are a branched poly(arylene sulfide) resin having a melt viscosity measured at a temperature of 310° C. and a shear rate of 1200 sec?1 of 65 to 450 Pa·s, a maximum draft ratio of 6500 or more, and a degree of whiteness of 65 or more; moreover, a branched poly(arylene sulfide) resin preferably having a dependence of melt viscosity on shear rate of 1.4 to 2.6 or a melt stability of 0.85 to 1.30; and a method for producing a branched poly(arylene sulfide) resin, wherein a sulfur source and a dihaloaromatic compound are caused to undergo a polymerization reaction at a temperature of 170 to 290° C. in the organic amide solvent in the presence of a polyhaloaromatic compound in an amount of 0.0001 to 0.01 mol per mol of the fed sulfur source.
    Type: Application
    Filed: March 22, 2011
    Publication date: January 24, 2013
    Applicant: KUREHA CORPORATION
    Inventors: Shingo Taniguchi, Hiroshi Sakabe, Yui Yoshida, Kazuhiko Sunagawa
  • Publication number: 20120178898
    Abstract: A method is provided for producing a polyarylene sulfide by reacting a sulfidizing agent with a dihalogenated aromatic compound in an organic polar solvent in the presence of an alkali metal hydroxide, the method includes <Step 1>: carrying out the reaction in such a manner that the polymerization time in a temperature range of 230° C. to less than 245° C. (T1a) is not less than 30 minutes and less than 3.5 hours and that the conversion ratio of the dihalogenated aromatic compound at the end of the step is 70 to 98 mol. % and <Step 2>: carrying out the reaction in such a manner that the polymerization time in a temperature range of 245° C. to less than 280° C. (T2) is not less than 5 minutes and less than 1 hour.
    Type: Application
    Filed: August 26, 2010
    Publication date: July 12, 2012
    Applicant: Toray Industries, Inc.
    Inventors: Takeshi Unohara, Hiroyuki Isago, Toru Nishimura, Masahiro Inohara
  • Patent number: 8168732
    Abstract: The present description discloses a polymeric composition which is a melt-processed alloy comprised of (a) a polyarylene sulfide resin, (b) a polyaryl-ether-ketone resin, and a reactive compound which results in (c) a graft copolymer of the polyarylene sulfide resin and/or the polyaryl-ether-ketone resin in addition to the starting resins. Exemplary melt-processed polymeric compositions can be made by reacting an alkoxy silane with the polyarylene sulfide resin and/or the polyaryl-ether-ketone resin to produce a graft copolymer of a portion of one or both of the resins, sufficient to render the composition uniform and homogeneous. It is normally preferred for the exemplary organosilane compound, to be an amino silane. The subject invention further reveals an insulated wire comprising (1) an electrical conductor and (2) a layer of the melt-processed alloy composition; and fiber reinforced composites comprising fibers substantially fully impregnated with the alloy polymeric composition.
    Type: Grant
    Filed: April 18, 2008
    Date of Patent: May 1, 2012
    Assignee: Ticona LLC
    Inventors: Manoj Ajbani, Andrew Auerbach, Ke Feng
  • Publication number: 20120035291
    Abstract: The present invention discloses processes for forming polythiol compositions from olefinic hydrocarbons such as cyclooctadiene, cyclododecatriene, and trivinylcyclohexane. The polythiol compositions produced from these processes, including the sulfur-containing compounds of these compositions, also are described.
    Type: Application
    Filed: August 3, 2010
    Publication date: February 9, 2012
    Applicant: CHEVRON PHILLIPS CHEMICAL COMPANY LP
    Inventors: Michael S. Matson, Mitchell D. Refvik, Eric J. Netemeyer, Colin Cameron, Alastair Robert Marrion, Anthony Colin Wright
  • Patent number: 7717363
    Abstract: The present invention provides polymers which substantially degrade in the presence of one or more triggers, preferably light energy or hydrogen peroxide, but does not substantially degrade in the absence of one or more triggers.
    Type: Grant
    Filed: May 8, 2008
    Date of Patent: May 18, 2010
    Assignee: California Institute of Technology
    Inventors: Mark E. Davis, Kenneth W. Wright, Ryan K. Zeidan
  • Patent number: 7091307
    Abstract: The present invention relates to a composition for optical materials, comprising (a) a compound having in one molecule at least one structure represented by the following Formula 1: wherein R1 is a single bond or a C1-10 hydrocarbon group, each of R2, R3 and R4 is a C1-10 hydrocarbon group or hydrogen, Y is O, 5, Se or Te, m is 1 to 5, and n is 0 to 5; (b) a compound having in one molecule at least one isocyanate group and/or at least one isothiocyanate group; (c) a compound having in one molecule at least one mercapto group; and (d) an inorganic compound having sulfur atom and/or selenium atom, and also relates to an optical material produced by polymerization curing the composition, a production method thereof, and an optical lens comprising the optical material. The present invention provides a high refractive, high Abbe's number optical material having an improved impact resistance.
    Type: Grant
    Filed: October 11, 2001
    Date of Patent: August 15, 2006
    Assignee: Mitsubishi Gas Chemical Company, Inc.
    Inventors: Yuichi Yoshimura, Motoharu Takeuchi, Hiroshi Horikoshi
  • Patent number: 7026439
    Abstract: There is disclosed a process for continuously producing a polyarylene sulfide which comprises reacting a sulfur source with a dihalogenated aromatic compound in an aprotic organic solvent, characterized by maintaining the content of the dihalogenated aromatic compound in the polymerization liquid after the substantial completion of the polymerization reaction at 5 mg/g or higher. It is made possible by the process according to the present invention to efficiently produce the polyarylene sulfide which has a high molecular weight and is excellent in thermal stability.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: April 11, 2006
    Assignees: Petroleum Energy Center, Idemitsu Kosan Co., Ltd.
    Inventors: Minoru Senga, Masaya Okamoto, Mikiya Hayashi
  • Patent number: 6939941
    Abstract: A process is provided for the manufacture of liquid polysulfide polymers. In particular, the process allows for making the liquid form of the polysulfide polymer directly and eliminates the need to first make a solid polysulfide polymer and then convert it to a liquid.
    Type: Grant
    Filed: August 27, 2002
    Date of Patent: September 6, 2005
    Assignee: Toray Fine Chemicals Co., Ltd.
    Inventors: John Richard Gilmore, Keith Bradley Potts, Steven John Hobbs, Marc Edward Halpern, Thomas Dennis Mundle
  • Patent number: 6747122
    Abstract: The invention relates to a simple process for the preparation of polymeric sulfur compounds with polythiocyclopentanediyl structural elements which are used as vulcanizing agents for diene rubbers.
    Type: Grant
    Filed: July 15, 2002
    Date of Patent: June 8, 2004
    Assignee: Bayer Aktiengesellschaft
    Inventors: Josef Hahn, Marco Runk, Hermann-Josef Weidenhaupt, Hartmuth Buding
  • Patent number: 6632805
    Abstract: A method of dyeing and treating a substrate using a water-stabilized organosilane. A method of antimicrobially treating a food article. A method of antimicrobially coating a fluid container. A method of antimicrobially coating a latex medical article.
    Type: Grant
    Filed: May 7, 1996
    Date of Patent: October 14, 2003
    Assignee: Emory University
    Inventors: Lanny S. Liebeskind, Gary D. Allred
  • Patent number: 6566488
    Abstract: Provided are a polyarylene sulfide having a chloroform soluble content of at most 0.5% by weight and having an inherent viscosity &eegr;inh of from 0.05 to 0.4; a polyarylene sulfide resin composition comprising a polyarylene sulfide and an inorganic filler, of which the chloroform soluble content is at most 0.5% by weight relative to the polyarylene sulfide in the composition; car parts produced through injection molding of the composition; and a method for producing a polyarylene sulfide. The polyarylene sulfide has a reduced content of low-molecular components, and has well balanced properties of fluidity, flexural strength and impact resistance.
    Type: Grant
    Filed: March 15, 2002
    Date of Patent: May 20, 2003
    Assignees: Idemitsu Kosan Co., Ltd., Idemitsu Petrochemical Co., Ltd., Petroleum Energy Center (PEC)
    Inventors: Masaya Okamoto, Toru Bando
  • Patent number: 6538102
    Abstract: The present invention relates to a process for preparing sulfur-containing polymers from at least one sulfide and from at least one aromatic dihalogen compound in at least one solvent, where a) a mixture made from a sulfide and from a solvent is prepared in a first reaction vessel, b) the sulfide and an aromatic dihalogen compound react in a second reaction vessel to form a sulfur-containing polymer, c) the pressure in the second reaction vessel is to some extent or completely released during the reaction, and the emanating vapor mixture is brought into contact with the mixture prepared in step (a).
    Type: Grant
    Filed: January 11, 2001
    Date of Patent: March 25, 2003
    Assignee: Ticona GmbH
    Inventors: Michael Haubs, Reinhard Wagener, Markus Lehrl
  • Publication number: 20020065388
    Abstract: The present invention provides a process for producing polyhydroxycarboxylic acids which comprises subjecting at least one hydroxycarboxylic acid or oligomer thereof to polycondensation in the presence of an alkali metal compound, an alkaline earth metal compound, or a compound of a metal of Group IIIb of the periodic table. The polyhydroxycarboxylic acids obtained by the process have a weight-average molecular weight of 30,000 or above and are useful as biodegradable plastics for food-wrapping films, drug delivery systems, etc.
    Type: Application
    Filed: December 4, 1997
    Publication date: May 30, 2002
    Inventors: HIROSHIGE MARUYAMA, TOSHIKAZU MURAYAMA, NORIO YANAGISAWA, NOBUKO TSUZAKI
  • Patent number: 6310175
    Abstract: The present invention provides a new star-shaped block copolymer and a production process therefor, wherein the new star-shaped block copolymer has high heat resistance despite having a low viscosity. It has been found that a new star-shaped block copolymer has high heat resistance wherein the new star-shaped block copolymer comprises a plurality of star-shaped structures 1 in which at least three chain polymer segments 2 are radially extended from a central polyvalent mercaptan segment 3, wherein the star-shaped structures 1 are bonded to each other through a bonding structure 4 at their chain polymer segments.
    Type: Grant
    Filed: October 23, 1999
    Date of Patent: October 30, 2001
    Assignee: Nippon Shokubai Co., Ltd.
    Inventors: Nobuhiro Kobayashi, Masatoshi Yoshida
  • Patent number: 6201098
    Abstract: The invention concerns a process for preparing linear or branched sulphurous polymers such as polyarylene sulphides, in particular polyphenylene sulphide, from an aromatic dihalide compound and a sulphide in a solvent, wherein a) the aromatic dihalide compound and the sulphide are partially reacted; b) the resultant salt which is not dissolved in the reaction medium is separated off; and c) the reaction mixture largely freed of the salt is further polymerized.
    Type: Grant
    Filed: May 24, 1999
    Date of Patent: March 13, 2001
    Assignee: Ticona GmbH
    Inventors: Michael Haubs, Stephan Wagner, Olaf Besser
  • Patent number: 6001934
    Abstract: A simple and convenient process is provided to introduce a sufficient quantity of functional groups to a main chain or terminals of the chain of a polyarylene sulfide resin to improve properties of the resin.The invention provides a process for heat oxidation crosslinking a polyarylene sulfide resin, characterized by conducting the heat oxidation crosslinking reaction in the presence of at least one organic compound having at least one active-hydrogen-containing group or at least one organic compound having at least one active-hydrogen-containing group and a group derived from an active hydrogen containing group by substituting an active hydrogen of the active hydrogen containing group with an alkali metal, to thereby prepare a functional group-containing polyarylene sulfide resin.
    Type: Grant
    Filed: September 1, 1998
    Date of Patent: December 14, 1999
    Assignee: Tonen Chemical Co.
    Inventors: Hidenori Yamanaka, Osamu Komiyama
  • Patent number: 5948842
    Abstract: The present invention provides a rubber composition comprising natural rubber and/or diene synthetic rubbers, silica in an amount of 10 to 85 parts by weight per 100 parts by weight of the rubber, a specific silane coupling agent, i.e., a bis-(alkoxysilylalkyl) polysulfide having a polysulfide structure in which the distribution of sulfur is specified, in an amount of 1 to 20% by weight of the amount of silica, and provides a pneumatic tire manufactured by using the rubber composition. The pneumatic tire has excellent low heat buildup property, low rolling resistance, and reinforcing property.
    Type: Grant
    Filed: August 25, 1997
    Date of Patent: September 7, 1999
    Assignee: Bridgestone Corporation
    Inventors: Shunji Araki, Kazuhiro Yanagisawa
  • Patent number: 5898061
    Abstract: This invention provides a method for producing polyarylene sulfide continuously, comprising; 1) polymerization step wherein polyarylene sulfide is polymerized from a sulfur compound in the liquid or gas state and a dihalogenated aromatic compound in non-protonic organic solvent, 2) separation step wherein mixture of the polymerization solution and the washing solution is separated into the polymer phase and the solvent phase, and in said separation step said polymer phase is continuously taken out in the liquid state. The method of this invention makes it possible to produce polyarylene sulfide of high purity that it is suitable for molding and injection molding of the seat, the film, the fiber, etc. for the electronic and electric material field etc., with high-molecular-weight and low content of by-products, efficiently and economically.
    Type: Grant
    Filed: November 26, 1997
    Date of Patent: April 27, 1999
    Assignees: Idemitsu Petrochemical Co., Ltd., Petroleum Energy Center (PEC)
    Inventors: Kiyoshi Sase, Yoshinari Koyama, Masao Oomori
  • Patent number: 5869599
    Abstract: A polyarylene sulfide free of inorganic contaminants, especially residues of inorganic polymerization catalysts, is produced by the free radical, ring-opening polymerization of a cyclic thioether.
    Type: Grant
    Filed: September 8, 1997
    Date of Patent: February 9, 1999
    Inventors: Allan S. Hay, Yifeng Wang
  • Patent number: 5824767
    Abstract: A process for improving the processability of poly(arylene sulfide) in melt spinning operations by treatment with a barium-containing compound and, optionally, a lubricant is disclosed.
    Type: Grant
    Filed: July 8, 1996
    Date of Patent: October 20, 1998
    Assignee: Hoechst Celanese Corporation
    Inventors: Balaram B. Gupta, Andrew B. Auerbach, Barrie L. Davies
  • Patent number: 5756654
    Abstract: Disclosed is a process for manufacturing polyarylene sulfide comprising pre-polymerizing a dihalogeno-aromatic compound with a liquid or gaseous sulfur compound in the presence of a lithium compound in an aprotic organic solvent followed by further polymerizing the resulting pre-polymerized system; which is characterized in that sufficient water is added to the pre-polymerized solution (I) to separate it into a tick polymer phase and a solvent phase, then a solvent is added to the thus-separated, thick polymer phase and the resulting polymer phase is further polymerized, for efficiently manufacturing high-purity polyarylene sulfide. The process does not require any complicated steps of washing the polymer with a multi-stage washing system and is free from the increase in the production costs of the polymer. In the process, the lithium salt used can be recovered efficiently.
    Type: Grant
    Filed: August 21, 1996
    Date of Patent: May 26, 1998
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Kiyoshi Sase, Kohji Namiki, Tetsuro Takeya
  • Patent number: 5658487
    Abstract: A contaminant precipitating composition and method are disclosed. The composition comprises a water soluble, branched, polydithiocarbamic acid salt effective for the purpose of precipitating contaminants from an aqueous solution. The method comprises adding an amount of the composition effective for the purpose to the aqueous solution so as to complex, precipitate and remove contaminants from the aqueous solution.
    Type: Grant
    Filed: November 1, 1995
    Date of Patent: August 19, 1997
    Assignee: Betz Laboratories, Inc.
    Inventors: William S. Carey, Ellen M. Meyer
  • Patent number: 5635587
    Abstract: A process for efficiently manufacturing high purity polyarylene sulfide. The process comprises feeding a liquid or gaseous sulfur compound (e.g. hydrogen sulfide) to a mixture comprising lithium hydroxide and a non-lithium hydroxide solid compound (e.g. alkali metal chloride or alkaline earth metal chloride) in a non-protonic organic solvent (e.g. N-methyl-2-pyrrolidone), separating the alkali metal chloride or alkaline earth metal chloride, adjusting the sulfur content of the reaction mixture, feeding a dihalogeno aromatic compound e.g. p-dichlorobenzene) to effect a polycondensation reaction, and adding of an alkali metal hydroxide (e.g. sodium hydroxide) to recover lithium ion.
    Type: Grant
    Filed: December 16, 1994
    Date of Patent: June 3, 1997
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Yoshinari Koyama, Norio Ogata, Hiroshi Nishitani
  • Patent number: 5594096
    Abstract: A contaminant precipitating composition and method are disclosed. The composition comprises a water soluble branched polymeric composition effective for the purpose of precipitating contaminants from an aqueous solution. The method comprises adding an amount of the composition, effective for the purpose, to the aqueous solution so as to complex, precipitate and remove contaminants from the aqueous solution.
    Type: Grant
    Filed: March 1, 1996
    Date of Patent: January 14, 1997
    Assignee: BetzDearborn Inc.
    Inventors: William S. Carey, Ellen M. Meyer, Jeffrey H. Peltier
  • Patent number: 5561215
    Abstract: A method for removing cured sulfur-containing polymer sealants from surfaces is disclosed. The method comprises applying to the surface a sealant remover comprising at least about 50 wt. % of a pyrrolidone, especially N-methyl-2-pyrrolidone, and allowing the cured sulfur-containing polymer and the remover to remain in contact until the cured sulfur-containing polymer is loosened and can be easily removed from the surface. The method of the invention enables fast, effective removal of the sulfur-containing polymer sealants commonly used in the aerospace, construction, and insulating-glass industries.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: October 1, 1996
    Assignee: Arco Chemical Technology, L.P.
    Inventor: Daniel B. Pourreau
  • Patent number: 5521274
    Abstract: A polysulfide-modified epoxy resin system in which, upon curing, the polysulfide rubber phase separates into discrete particles, typically 1 to 5 .mu.m in size, to enhance physical properties such as peel strength without any significant reduction in glass transition temperature. The phase separation is brought about by using as a modifier a liquid polysulfide containing a high proportion of polymethylene groups of 4 to 12 carbon atoms. The polysulfide may be adducted with an excess of epoxy resin prior to incorporation in the composition.
    Type: Grant
    Filed: December 6, 1994
    Date of Patent: May 28, 1996
    Assignee: Morton International Limited
    Inventor: Andrea Wilford
  • Patent number: 5371111
    Abstract: The method of reprocessing cured polysulfide and polymercaptan elastomers includes reacting an 0.5 to 400 percent-by-weight portion of a polysulfide and/or polymercaptan elastomer with at least one liquid di- or polymercapto compound, with a plasticizer and with a filling material and with an binding agent to form a polysulfide sealing material-base component. Then a polysulfide sealing material curing agent is added to the polysulfide sealing material-base component to form the reprocessed cured polysulfide sealing material with a Shore-A-Hardeness>40 and a tensile strength>1 MPa.
    Type: Grant
    Filed: December 21, 1992
    Date of Patent: December 6, 1994
    Assignee: Metallgesellschaft Aktiengesellschaft
    Inventors: Gerfried Unger, Ralph-Josef Hecktor, Reiner Theobald, Franz Specht
  • Patent number: 5364928
    Abstract: A process for preparing high molecular weight arylene sulfide polymers by dehydrating an aqueous mixture of a sulfur source and a cyclic organic amide to form a dehydrated mixture, contacting the dehydrated mixture with a dihaloaromatic compound to produce a polymerization mixture, polymerizing the polymerization mixture and recovering the arylene sulfide polymer wherein an aqueous alkali metal carboxylate mixture is added to the polymerization mixture after the conversion of the dihaloaromatic compound is about 40 percent to about 30 minutes prior to entering into termination of the polymerization.
    Type: Grant
    Filed: May 14, 1993
    Date of Patent: November 15, 1994
    Assignee: Phillips Petroleum Company
    Inventor: Carlton E. Ash
  • Patent number: 5306805
    Abstract: This invention relates to a simplified process for the preparation of polyarylene sulphides with improved product quality from alkali metal sulphides and dihalogenated aromatic compounds, in which the alkali metal sulphides are prepared and reacted in situ.
    Type: Grant
    Filed: February 10, 1992
    Date of Patent: April 26, 1994
    Assignee: Bayer AG
    Inventors: Wolfgang Arlt, Wolfgang Alewelt, Karl-Heinrich Meyer, Manfred Schmidt, Erhard Tresper, Wolfgang Eisermann
  • Patent number: 5296579
    Abstract: A process for the production of arylene sulfide polymers is provided which comprises subjecting a mixture of at least one first sulfur source, at least one second sulfur source comprised of at least one organic monothiol compound, at least one polyhalo-substituted aromatic compound and at least one polar organic compound to polymerization conditions sufficient to produce the arylene sulfide polymer. The organic monothiol compound can be added at any time prior to substantial completion of polymerization to provide arylene sulfide polymers of increased extrusion rate.
    Type: Grant
    Filed: February 11, 1988
    Date of Patent: March 22, 1994
    Assignee: Phillips Petroleum Company
    Inventors: Jon F. Geibel, Robert W. Campbell, Guy Senatore, Fernando C. Vidaurri, Mark A. Haney
  • Patent number: 5260411
    Abstract: A method for the preparation of a polyimide containing reversible crosslinks comprising the step of curing a monomer having the formula ##STR1## wherein R and R' may be the same or different and each is H or lower alkyl having 1-5 carbon atoms under conditions conducive to the formation of a polyimide and thereby forming a polyimide having the formula ##STR2## R and R' are as defined above and n is an integer from 10 to 100. The polyimide may be converted to a soluble polymer by cleaving the disulfide bond in the presence of a solvent and a reducing agent. The reduced polymer may be reformed into the polymer in an oxidation step or into a modified polyimide in other reaction steps. Copolymerization processes are also disclosed.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: November 9, 1993
    Assignee: Polytechnic University
    Inventors: Giuliana C. Tesoro, Vinod R. Sastri
  • Patent number: 5239051
    Abstract: A method is provided for increasing reactant concentrations for the polymerization of PPS without creating a deterioration of the molecular weight of the resultant polymer by limiting the amount of by-product water present during the initial portion of the polymerization reaction.
    Type: Grant
    Filed: October 7, 1991
    Date of Patent: August 24, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Jon F. Geibel, John E. Inda
  • Patent number: 5239050
    Abstract: A process for preparing high molecular weight arylene sulfide polymers by dehydrating an aqueous mixture of a sulfur source and a cyclic organic amide to form a dehydrated mixture, contacting the dehydrated mixture with a dihaloaromatic compound to produce a polymerization mixture, polymerizing the polymerization mixture and recovering the arylene sulfide polymer wherein an aqueous alkali metal carboxylate mixture is added to the polymerization mixture after the conversion of the dihaloaromatic compound is about 40 percent to about 30 minutes prior to entering into termination of the polymerization.
    Type: Grant
    Filed: May 13, 1991
    Date of Patent: August 24, 1993
    Assignee: Phillips Petroleum Company
    Inventor: Carlton E. Ash
  • Patent number: 5200499
    Abstract: A method is provided for increasing reactant concentrations for the polymerization of PPS without creating a deterioration of the molecular weight of the resultant polymer by venting excessive by-product water during the polymerization reaction.
    Type: Grant
    Filed: November 29, 1990
    Date of Patent: April 6, 1993
    Assignee: Phillips Petroleum Company
    Inventors: Jon F. Geibel, John E. Inda
  • Patent number: 5175243
    Abstract: An arylene sulfide polymer and a process for preparing same by contacting a sulfur source, a cyclic organic amide and a dihaloaromatic compound to produce a polymerization mixture, polymerizing the polymerization mixture and recovering the arylene sulfide polymer wherein the process is conducted in the presence of a compound having the formula ##STR1## wherein X is selected from the group consisting of bromine and iodine, Y is a non-activating or deactivating group and is selected from the group consisting of ##STR2## R' and R" are hydrogen or an alkyl group having 1 to about 15 carbon atoms, and Ar' is selected from the group consisting of ##STR3##
    Type: Grant
    Filed: November 14, 1990
    Date of Patent: December 29, 1992
    Assignee: Phillips Petroleum Company
    Inventor: Carlton E. Ash
  • Patent number: 5171831
    Abstract: A process for producing an easily recoverable poly(arylene sulfide) polymer having a melt flow of less than 130 g/10 min., which processes comprises:a) adding a second polar organic compound to a polymerization reaction mixture during polymerization immediately prior to termination of said polymerization, wherein said polymerization reaction mixture is formed by reacting reactants comprising a dihaloaromatic compound, a sulfur source and a first polar organic compound under suitable polymerization conditions, and wherein the molar ratio of second polar organic compound added to first polar organic compound is in the range of 0.05 to 2; and thereafterb) terminating said polymerization; andc) recovering said polymer.
    Type: Grant
    Filed: December 3, 1990
    Date of Patent: December 15, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Afif M. Nesheiwat, Kenneth C. Hoover
  • Patent number: 5164095
    Abstract: A water soluble ethylene dichloride ammonia polymer having a molecular weight of from 500 to 10,000 which contains from 5 to 50 mole % of dithiocarbamate salt groups. Also, disclosed is the use of these polymers in removing heavy metals from water.
    Type: Grant
    Filed: March 3, 1992
    Date of Patent: November 17, 1992
    Assignee: Nalco Chemical Company
    Inventors: John W. Sparapany, John H. Collins
  • Patent number: 5159056
    Abstract: A process for preparing arylene sulfide polymers by contacting a sulfur source, a cyclic organic amide, and a dihaloaromatic compound to form a polymerization mixture, polymerizing the polymerization mixture and recovering the arylene sulfide polymer wherein the process is conducted in the presence of titanium dioxide.
    Type: Grant
    Filed: December 11, 1990
    Date of Patent: October 27, 1992
    Assignee: Phillips Petroleum Company
    Inventor: George A. Earley
  • Patent number: 5155207
    Abstract: Films and fibers are prepared from arylene sulfide resins comprising first recurring units consisting of aromatic structures having the form: ##STR1## and second recurring units including units selected from aromatic structures having the form: ##STR2##
    Type: Grant
    Filed: February 23, 1990
    Date of Patent: October 13, 1992
    Assignee: Phillips Petroleum Company
    Inventors: Guy Senatore, Liang Yeon F.
  • Patent number: 5144004
    Abstract: An arylene sulfide sulfone/sulfoxide polymer and a process for preparing same by contacting at least one dihaloaromatic sulfone, at least one dihaloaromatic sulfoxide, at least one organic amide, at least one sulfur-containing compound, and water.
    Type: Grant
    Filed: December 10, 1990
    Date of Patent: September 1, 1992
    Assignee: Phillips Petroleum Company
    Inventor: Rex L. Bobsein