| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 528381000 | From inorganic sulfur-containing reactant | 29 |
| 20120302726 | METHOD FOR PREPARING POLYARYLENE SULFIDE HAVING REDUCED IODINE CONTENT - This disclosure relates to a method for preparing polyarylene sulfide having reduced iodine content while having excellent thermal stability, specifically to a method comprising polymerization reacting a composition comprising diiodide aromatic compounds, sulfur compounds, and a polymerization terminator. The preparation method may effectively reduce iodine content of polyarylene sulfide to prevent corrosion of post processing equipment, improve properties of polyarylene sulfide such as thermal stability, and the like, and thus, it may be usefully applied in the industrial field relating to preparation of polyarylene sulfide. | 11-29-2012 |
| 20120322971 | RECYCLABLE POLYARYLENE SULFIDE AND PREPARATION METHOD THEREOF - This disclosure relates to recyclable polyarylene sulfide that may exhibit and maintain excellent mechanical properties, particularly does not exhibit decrease in melt viscosity when it is molten, and thus, exhibit little deterioration of mechanical properties, and a method for preparing the same. | 12-20-2012 |
| 20150344632 | A FIBER-GRADE POLYPHENYLENE SULFIDE RESIN SYNTHESIS METHOD - The present invention discloses a fiber-grade polyphenylene sulfide resin synthesis method, taking sodium bisulfide and p-dichlorobenzene as raw materials, N-methyl pyrrolidone as the solvent and C5-C6 fatty acid salt formed through dehydration to C5-C6 fatty acid and sodium hydroxide as the polymerization additive for synthesis through polymerization. White polyphenylene sulfide resin is obtained through acidification and washing of reaction slurry. In view of the fact that MFR is below 125 g/10 min, weight-average molecular weight as measured by GPC is over 4.2×10 | 12-03-2015 |
| 20160075832 | Process for Preventing Thiophenol Formation and/or Accumulation During Production of Poly(Arylene Sulfide) - A process for producing a poly(arylene sulfide) polymer comprising (a) polymerizing reactants in a reaction vessel to produce a poly(arylene sulfide) reaction mixture, (b) processing at least a portion of the poly(arylene sulfide) reaction mixture to obtain a poly(arylene sulfide) reaction mixture downstream product, and (c) contacting a reactive aryl halide with at least a portion of the poly(arylene sulfide) reaction mixture and/or downstream product thereof, wherein before and/or after the contacting, the poly(arylene sulfide) reaction mixture and/or downstream product thereof comprise less than about 0.025 wt. % thiophenol, based on the total weight of the poly(arylene sulfide) reaction mixture and/or downstream product thereof. | 03-17-2016 |
| 528382000 | Sulfur dioxide is a reactant | 1 |
| 20130172523 | METHOD FOR PRODUCING COPOLYMER OF DIALLYLAMINE AND SULFUR DIOXIDE - Provided is a process for producing a copolymer of a diallylamine and sulfur dioxide which copolymer has a higher molecular weight and water-solubility than that obtained by a conventional production process by copolymerizing the diallylamine and sulfur dioxide in the presence of an acid and a radical polymerization initiator in a polar solvent. | 07-04-2013 |
| 528387000 | Carbon disulfide or hydrogen sulfide is reactant | 1 |
| 20120178898 | POLYARYLENE SULFIDE AND METHOD FOR PRODUCING THE SAME - 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 : 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 : 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. | 07-12-2012 |
| 528388000 | Inorganic sulfur reactant contains at least one metal atom or contains an ammonium ion | 16 |
| 20100113739 | Poly (arylene sulfide) and production process thereof - A poly(arylene sulfide) having properties that a melt viscosity is 1 to 3,000 Pa·s as measured under conditions of a temperature of 310° C. and a shear rate of 1,216 sec | 05-06-2010 |
| 20100210813 | SYSTEM AND METHOD FOR REDUCING OFF-GASSING OF POLYPHENYLENE SULFIDE - The techniques provide a system and a method of producing polyphenylene sulfide (PPS) polymer. The PPS polymer is produced by reacting a sulfur source and a dihaloaromatic compound in the presence of a polar organic compound in a polymerization mixture in a polymerization vessel. The PPS polymer is washed with a base to lower the oligomer content of the PPS polymer and thus the off-gassing during processing. | 08-19-2010 |
| 20100228003 | METHOD FOR PRODUCING POLYARYLENE SULFIDE - A method for producing an acid group-containing polyarylene sulfide of the present invention includes a reaction step of reacting a polyhaloaromatic compound (a), an alkali metal hydrosulfide (b), and an alkali metal carboxylate (c) in the presence of a solid alkali metal sulfide and a lithium ion. | 09-09-2010 |
| 20100240863 | METHOD FOR PRODUCING ACID GROUP-CONTAINING POLYARYLENE SULFIDE - A method for producing an acid group-containing polyarylene sulfide of the present invention includes a reaction step of reacting a polyhaloaromatic compound (a), an alkali metal hydrosulfide (b), an alkali metal carboxylate (c), and an aromatic compound (d) having an elimination group and an acid group, which function in a nucleophilic reaction, in the presence of a solid alkali metal sulfide. | 09-23-2010 |
| 20110178268 | Production Process of Granular Poly(Arylene Sulfide) - The invention provides a production process of a granular poly(arylene sulfide) by polymerizing a sulfur source and a dihalo-aromatic compound in an organic amide solvent by a polymerization process containing a phase-separation polymerization step, wherein the production process contains a step I of adding an aromatic compound in a proportion of 0.01 to 20 mol per 100 mol of the organic amide solvent into the liquid phase containing the organic amide solvent and a formed polymer within the polymerization reaction system, said liquid phase being in the phase-separated state, after the phase-separation polymerization step; a step II of cooling the liquid phase within the polymerization reaction system; and a step III of collecting the formed polymer from the liquid phase. | 07-21-2011 |
| 20120322972 | Column-Type Solid-Liquid Countercurrent Contact Apparatus, Solid Particle Washing Apparatus, and Method - A column-type solid-liquid countercurrent contact apparatus, a washing apparatus for solid particles such as poly(arylene sulfide) (PAS) particles, a PAS manufacturing apparatus, a method of solid-liquid countercurrent contact, a method of washing solid particles such as PAS particles, and a method of manufacturing PAS, wherein a column top part, a column body part, and a column bottom part are included, the column body part is provided with a plurality of stirring chambers connected in the vertical direction and mutually divided by a ring-shaped partitioning plate, a paddle blade (a blade diameter/a diameter of the stirring chamber≧0.65 and the blade diameter/the diameter of the stirring chamber≦0.10) and a baffle are disposed at each of the plurality of stirring chambers, and a disc having a size covering at least a part of a communication opening positioned below the paddle blade is attached to a rotating shaft or to the paddle blade. | 12-20-2012 |
| 20130116401 | Production Process of Poly(Arylene Sulfide) and Production Apparatus Thereof - 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). | 05-09-2013 |
| 20140128568 | METHOD FOR MANUFACTURING POLYARYLENE SULFIDE RESIN - A method for producing a polyarylene sulfide resin, comprising: producing a slurry (I) containing a solid alkali metal sulfide by allowing a hydrous alkali metal sulfide, or a hydrous alkali metal hydrosulfide and an alkali metal hydroxide, and an aliphatic cyclic compound (c1) that can be ring-opened by hydrolysis to react with each other while conducting dehydration in the presence of a non-hydrolyzable organic solvent; adding an aprotic polar organic solvent after the production of the slurry (I) and distilling off water to conduct dehydration; and conducting polymerization by allowing a polyhaloaromatic compound (a), an alkali metal hydrosulfide (b), and an alkali metal salt (c2) of a hydrolysate of the compound (c1) to react with each other in the slurry (I) in a state where the amount of water existing in the reaction system is 0.02 moles or less relative to 1 mole of the aprotic polar organic solvent. | 05-08-2014 |
| 20140256907 | PRODUCTION METHOD OF CYCLIC POLYARYLENE SULFIDE - There is provided a production method of a cyclic polyarylene sulfide from a reaction mixture including at least a sulfidizing agent (a), a dihalogenated aromatic compound (b) and an organic polar solvent (c). The production method includes: a process 1 of heating the reaction mixture having an arylene unit of not less than 0.80 mol but less than 1.05 mol per 1 mol of the sulfur content in the reaction mixture; and subsequent to the process 1, a process 2 of further causing the reaction to proceed after addition of the dihalogenated aromatic compound (b) to have the arylene unit of not less than 1.05 mol and not greater than 1.50 mol per 1 mol of the sulfur content in the reaction mixture. | 09-11-2014 |
| 20150057429 | PRODUCTION METHOD OF POLYARYLENE SULFIDE, CYCLIC POLYARYLENE SULFIDE PELLET AND PRODUCTION METHOD THEREOF - A production method includes a process (I) of heating a cyclic polyarylene sulfide composition under reduced pressure and a process (II) of heating and polymerizing a cyclic polyarylene sulfide composition. This simple method allows for production of a polyarylene sulfide of the higher molecular weight and can produce a polyarylene sulfide having a narrow molecular weight distribution, low gas generation and high industrial usability. Additionally, pelletization after the process (I) can produce a cyclic polyarylene sulfide pellet having ease of conveyance, excellent molding processability, less gas generation amount and high industrial usability. | 02-26-2015 |
| 20150087805 | Method and System for Separation of a Polymer from Multiple Compounds - Methods, devices, and systems that can be utilized in separating a polymer from other compounds of a polymer formation process are described. The methods utilize multiple sedimentors in a countercurrent flow design in conjunction with different solvent solutions in the multiple sedimentors to separate a product polymer from other compounds of a polymer formation process. The sedimentors include feed inlets that can encourage contact between countercurrent flows and improve mass transfer rates between the countercurrent flows. | 03-26-2015 |
| 20150126705 | METHOD FOR SEPARATING VOLATILE SUBSTANCES FROM MATERIAL MIXTURES AND DEVICE FOR PRODUCING POLYARYLENE SULPHIDES - The present invention relates to a method for separating volatile substances, particularly iodine, diiodised aromatic compounds and/or mixtures thereof, from material mixtures containing said compounds. The invention further relates to a device for producing polyarylene sulphides, by means of which volatile substances, particularly iodine and diiodised aromatic compounds, can be separated from the polymers. | 05-07-2015 |
| 20150376339 | Process for Production of Poly(Arylene Sulfide) - A process comprising (a) reacting a sulfur source and a dihaloaromatic compound in the presence of a polar organic compound to form a reaction mixture, (b) quenching the reaction mixture by adding a quench liquid thereto to form a quenched mixture, wherein the quench liquid comprises a particle size modifying additive, and (c) cooling the quenched mixture to yield poly(arylene sulfide) polymer particles. A process for producing a poly(phenylene sulfide) polymer comprising (a) reacting a sulfur source and a dihaloaromatic compound in the presence of N-methyl-2-pyrrolidone to form a reaction mixture, (b) quenching the reaction mixture by adding a quench liquid thereto to form a quenched mixture, wherein the quench liquid comprises a particle size modifying additive selected from the group consisting of sodium acetate, sodium benzoate, lithium acetate, lithium benzoate, lithium formate, sodium formate, and combinations thereof, and (c) cooling the quenched mixture to yield poly(phenylene sulfide) polymer particles. | 12-31-2015 |
| 20160130400 | CONTINUOUS PROCESS FOR PRODUCING POLY(ARYLENE SULFIDE) - A process comprising (a) contacting a sulfur compound and a polar organic compound to produce a sulfur complex mixture, wherein the sulfur complex mixture comprises a sulfur complex, (b) continuously introducing at least a portion of the sulfur complex mixture and at least one halogenated aromatic compound having two halogens to a reaction vessel to form a reaction mixture, wherein the reaction vessel is continuously stirred, and wherein the reaction vessel comprises a single reaction zone, (c) continuously removing a portion of the reaction mixture from the reaction vessel to yield a reaction product mixture, and (d) processing at least a portion of the reaction product mixture to obtain a poly(arylene sulfide) polymer, wherein the poly(arylene sulfide) polymer is the product of a single stage polymerization. | 05-12-2016 |
| 20160145393 | PROCESS FOR PRODUCTION OF POLY(ARYLENE SULFIDE) - A process for producing a poly(arylene sulfide) polymer comprising (a) polymerizing reactants in a reaction vessel to produce a poly(arylene sulfide) reaction mixture, (b) processing at least a portion of the poly(arylene sulfide) reaction mixture to obtain a poly(arylene sulfide) reaction mixture downstream product, and (c) contacting a by-product treatment additive with at least a portion of the poly(arylene sulfide) reaction mixture and/or downstream product thereof, and (d) processing at least a portion of the poly(arylene sulfide) reaction mixture downstream product to yield salt solids particulates, wherein the by-product treatment additive reduces agglomeration of the salt solids particulates. | 05-26-2016 |
| 20160145394 | Process for the Preparation of a Polysulfide - Pre-polymer according to structure (I) X—(R | 05-26-2016 |
| 528389000 | Elemental sulfur is reactant | 7 |
| 20090023888 | METHOD OF PRODUCING SULFUR-CONTAINING AROMATIC POLYMER - A method of producing a polymer of a sulfur-containing aromatic compound includes reacting, under heating, a halide of a sulfur-containing aromatic compound having at least one aromatic ring and at least one ring containing one or more disulfide bonds wherein one side of the disulfide-containing ring constitutes one side of the aromatic ring, with inorganic sulfur in an amount equivalent to 2 to 8 S atoms relative to 1 mol of the halide of the sulfur-containing aromatic compound in the presence of at least one inorganic base selected from the group consisting of an alkali metal hydroxide, an alkali metal hydrogen carbonate and an alkali metal carbonate and/or at least one organic base selected from the group consisting of a tri(lower alkyl)amine and a heterocyclic amine in an organic solvent. | 01-22-2009 |
| 20100022743 | POLYARYLENE SULFIDE RESIN WITH EXCELLENT LUMINOSITY AND PREPARATION METHOD THEREOF - The present invention relates to a polyarylene sulfide that is prepared from a composition including 100 parts by weight of solid sulfur, 500 to 10,000 parts by weight of iodinated aryl compounds, and 0.03 to 30 parts by weight of a sulfur-containing polymerization terminator with respect to 100 parts by weight of the solid sulfur, and has a melting temperature (Tm) of 255 to 285° C., and luminosity of 40 or higher as defined by the CIE Lab color model, and a process of preparing the same. The PAS resin is prepared from a composition including a sulfur-containing polymerization terminator and thus has excellent thermal properties and luminosity. | 01-28-2010 |
| 20120329983 | POLYARYLENE SULFIDE HAVING REDUCED OUTGASSING AND PREPARATION METHOD THEREOF - This disclosure relates to polyarylene sulfide that may exhibit excellent processability at low temperature, decrease outgassing and flash or burr generation, and thus may satisfactorily mold a product requiring high molding accuracy, and a method for preparing the same. Specifically, the polyarylene sulfide includes an arylene sulfide repeat unit and an arylene disulfide repeat unit, wherein the weight ratio of the arylene sulfide repeat unit:arylene disulfide repeat unit is 1:0.0001 to 1:0.05. | 12-27-2012 |
| 20140194592 | POLYARYLENE SULFIDE RESIN WITH EXCELLENT LUMINOSITY AND PREPARATION METHOD THEREOF - The present invention relates to a polyarylene sulfide that is prepared from a composition including 100 parts by weight of solid sulfur, 500 to 10,000 parts by weight of iodinated aryl compounds, and 0.03 to 30 parts by weight of a sulfur-containing polymerization terminator with respect to 100 parts by weight of the solid sulfur, and has a melting temperature (Tm) of 255 to 285° C., and luminosity of 40 or higher as defined by the CIE Lab color model, and a process of preparing the same. The PAS resin is prepared from a composition including a sulfur-containing polymerization terminator and thus has excellent thermal properties and luminosity. | 07-10-2014 |
| 20140350215 | METHOD FOR PREPARING POLYARYLENE SULFIDE HAVING REDUCED IODINE CONTENT - This disclosure relates to a method for preparing polyarylene sulfide having reduced iodine content while having excellent thermal stability, specifically to a method comprising polymerization reacting a composition comprising diiodide aromatic compounds, sulfur compounds, and a polymerization terminator. The preparation method may effectively reduce iodine content of polyarylene sulfide to prevent corrosion of post processing equipment, improve properties of polyarylene sulfide such as thermal stability, and the like, and thus, it may be usefully applied in the industrial field relating to preparation of polyarylene sulfide. | 11-27-2014 |
| 20150353687 | METHOD FOR PREPARING POLYARYLENE SULFIDE WITH REDUCED FREE IODINE CONTENT - The present invention relates to a method for preparing polyarylene sulfide with a reduced free iodine content. More specifically, the method for preparing polyarylene sulfide includes: (a) polymerizing reactants including a diiodo aromatic compound and a sulfur compound to form a polyarylene sulfide; and (b) maintaining the polyarylene sulfide product at 100 to 260° C. for heat-setting. The preparation method of the present invention effectively reduces the free iodine content of the polyarylene sulfide to prevent potential corrosion of facilities for the subsequent process and improves the properties of the polyarylene sulfide product such as thermal stability, so the method can be usefully applied to industrial fields in regard to the preparation of polyarylene sulfide. | 12-10-2015 |
| 20160060397 | METHOD FOR PRODUCING POLYARYLENE SULFIDE RESIN AND POLYARYLENE SULFIDE RESIN COMPOSITION - A problem is to provide a method for producing a polyarylene sulfide resin having excellent reactivity to other compounds and resins, such as an impact resistance improver such as an epoxysilane coupling agent, a functional group-containing thermoplastic elastomer, or the like, and also provide a polyarylene sulfide resin composition produced by the production method, not containing chlorine atoms, and having the excellent reactivity. A method for producing a polyarylene sulfide resin includes performing polymerization reaction of a mixture containing a diiodo aromatic compound, a sulfur compound, and a polymerization inhibitor having a specified functional group. The problem can be solved by using a polyarylene sulfide resin composition containing a polyarylene sulfide resin having a specified terminal functional group and iodine atoms within a range of 0.01 to 10,000 ppm relative to the polyarylene sulfide resin. | 03-03-2016 |
