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| Number | Title | Issue Date |
| 7847055 | Polyphenylene sulfide resin, process for producing the same, and fiber comprising the same A polyphenylene sulfide resin treated by thermal oxidation has a generated gas amount of 0.23 wt % or less when the resin is heated and melted in vacuum at 320° C. for 2 hours; a residual amount of 3.0 wt % or less as a residue when the resin is dissolved in an amo... | 12/07/2010 |
| 7569656 | Process for production of polyarylene sulfide There is provided a method for producing a poly(arylene sulfide) in which a dihalo-aromatic compound and an alkali metal halide are polymerized by heating in an organic amide solvent, wherein the cooling time for the polymerization reaction system is significantly r... | 08/04/2009 |
| 7517946 | Production process of poly(arylene sulfide) In the dehydration step, a mixture comprising an organic amide solvent and a sulfur source is heated, vapor volatilized is guided to a distillation column, a fraction comprising the organic amide solvent as a principal component is refluxed into a reaction vessel, a... | 04/14/2009 |
| 7294684 | Dimeric and polymeric alkylphenol polysulfides The invention relates to a process and composition-of-matter for the preparation of dimeric and polymeric alkylphenol polysulfides based on paracumyl phenol for use in vulcanizable rubbers in which the additive is a dimeric or polymeric alkylphenol polysulfide non-n... | 11/13/2007 |
| 7265196 | Controlled crosslinked polyaryletherketone material with improved properties and a process by producing the same The present invention relates to a controllable crosslinking polyaryletherketone with improved properties such as stiffness, heat resistance, and stability as shown by any one of the following structures: ... | 09/04/2007 |
| 7115704 | Method for producing a polyarylene sulfide This invention provides a method for producing a polyarylene sulfide, comprising the step of bringing a low-hydrated alkali metal sulfide containing respectively 0.05 to less than 0.8 mole of water and an organic amide solvent per mole of the sulfur contained in the... | 10/03/2006 |
| 7091307 | Composition for optical material 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 sin... | 08/15/2006 |
| 6492448 | Polyarylenesulfide resin composition A resin composition is provided which composition comprises 100 parts by weight of (A) polyarylene sulfide, and 0.01 to 5.0 parts by weight of (B) a product compound of an element selected from the group consisting of group IIA and group IIB of the period... | 12/10/2002 |
| 6437024 | Menthanol extraction of polar organic compounds and modifier compounds from poly(arylene sulfide) polymer and oligomer streams A process is provided to recover at least one modifier compound and at least one polar organic compound from a poly(arylene sulfide) reaction mixture comprising high molecular weight poly(arylene sulfide), low molecular weight poly(arylene sulfide), cycli... | 08/20/2002 |
| 6350852 | Process for producing sulfur-containing polymers by polymerizing prepolymers and monomers The process for preparing sulfur-containing polymers, in particular polyarylene sulfides, from at least one sulfide and at least one aromatic dihalogen compound, in a solvent, is carried out in the steps: a) a mixture of aromatic dihalogen compound and su... | 02/26/2002 |
| 6307011 | Recovery of modifier compounds and polar organic compounds from a poly(arylene sulfide) recycle mixture A process is provided to recover at least one modifier compound and at least one polar organic compound from a P(AS) recycle mixture.... | 10/23/2001 |
| 6201100 | Electroactive, energy-storing, highly crosslinked, polysulfide-containing organic polymers and methods for making same The present invention pertains to electroactive, energy-storing, highly crosslinked organic polymers and copolymers with a carbocyclic repeat unit comprising a non-aromatic carbocycle with from 3 to 12 ring carbon atoms, wherein each repeat unit is covale... | 03/13/2001 |
| 6194487 | Method of manufacturing modified particles In the present method of manufacturing modified particles, a saturated vapor of a monomer B is produced in a condensing chamber, and then particles containing a monomer A, which differs from the monomer B and is polymerizable therewith, are introduced, al... | 02/27/2001 |
| 5962630 | Process and material that encapsulates solid hazardous waste A method of encapsulating mixed waste in which a thermoplastic polymer having a melting temperature less than about 150° C. and sulfur and mixed waste are mixed at an elevated temperature not greater than about 200° C. and mixed for a time sufficient to... | 10/05/1999 |
| 5929203 | Process for preparing high molecular weight poly(arylene sulfide) polymers using lithium salts A process is provided for producing a high molecular weight poly(arylene sulfide) polymer employing at least one dihaloaromatic compound, a sulfur source, a polar organic compound, a lithium salt which is soluble in the polar organic compound, and water i... | 07/27/1999 |
| 5886130 | Polyphenylene co-polymers A new class of polyarylene co-polymers include repeating units comprising one or more arylene units having the general formula (--Ar--/--Y--)n, where Y is a divalent group chosen from nil, --Z--, --Z--Ph--, and --Ph--Z--Ph--, where Z is a dival... | 03/23/1999 |
| 5824767 | Poly(arylene sulfide) compositions having improved processability 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.... | 10/20/1998 |
| 5750656 | Process for sulfonating or sulfating polymers The invention is a process for the preparation of a sulfur-containing polymer, comprising: A. contacting sulfuric acid with one or more of fatty acid, fat or oil, and an inert solvent that allows dispersion of the sulfuric acid; B. contacting the mixture from ... | 05/12/1998 |
| 5712039 | Epoxy adhesives with dithiooxamide adhesion promoters The invention provides a curable, structural epoxy adhesive composition comprising: (a) an epoxy resin; (b) a curing agent for the epoxy resin; and (c) a compound of the formula I: ##STR1## in which R1 and R2, which may be the s... | 01/27/1998 |
| 5635587 | Process for manufacturing polyarylene sulfide 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. a... | 06/03/1997 |
| 5563240 | Poly [2,5-bis(polysulphano)-1,3,4-thiadiazoles] Poly[2,5-bis(polysulphano)-1,3,4-thiadiazoles] of the formula ##STR1## wherein X signifies a number from 1 to 10 and n signifies a number from 2 to 1,000.... | 10/08/1996 |
| 5561215 | Pyrrolidones for cleanup of sulfur-containing polymers 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 ... | 10/01/1996 |
| 5500474 | Stable conducting polymer and processes for the preparation thereof Conductive polymers having repeating units of formula (II) ##STR1## formed by chemical or electrochemical oxidation of aniline derivatives of formula (I) ##STR2## wherein R1 denotes --(CH2)n --; n is an integer b... | 03/19/1996 |
| 5432257 | Process for manufacturing a polysulfide polymer from the heavy ends waste of chlorinated hydrocarbon production A process is disclosed for preparing a polysulfide polymer using a heavy ends waste generated in chlorinated hydrocarbon production. The process involves first pretreating the heavy ends waste by an enriching process to form an enriched heavy ends waste w... | 07/11/1995 |
| 5411776 | Sealants A sealant comprising a mercapto-terminal liquid oligomer containing plasticizers, fillers and additives wherein the improvement comprises as curing agent an acrylic or methacrylic compound with at least two acrylic or methacrylic groups per molecule and a... | 05/02/1995 |
| 5364928 | Process for preparing arylene sulfide polymers 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 produc... | 11/15/1994 |
| 5306805 | Process for the preparation of polyarylene sulphides 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 sit... | 04/26/1994 |
| 5268451 | Process for the preparation of cross-linked polyarylene sulfide The present invention discloses a process for producing a granular polyarylene sulfide which has a high melt viscosity and a high degree of cross-linkage, becomes gel under melting and is easy to handle in the production and the fabrication thereof. The p... | 12/07/1993 |
| 5250657 | Process for preparing polyarylene thioether Polyarylene thioether is easily prepared by oxidative polymerizing an aromatic compound of the formula: ##STR1## wherein R1, R2, R3 and R4 are independently a hydrogen atom, a halogen atom, a lower alkyl gr... | 10/05/1993 |
| 5239050 | Process for preparing arylene sulfide polymer with addition of aqueous alkali metal carboxylate prior to termination of polymerization 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 produc... | 08/24/1993 |
| 5200500 | Process for the preparation of cross-linked polyarylene sulfide The present invention discloses a process for producing a granular polyarylene sulfide which has a high melt viscosity and a high degree of cross-linkage, becomes gel under melting and is easy to handle in the production and the fabrication thereof. The p... | 04/06/1993 |
| 5179194 | Process for production of polyarylenesulfides Disclosed herein is a process for the production of a polyarylenesulfide, wherein an alkali metal sulfide is reacted with a dihalo-aromatic compound in an organic amide solvent. The process comprises causing at least one compound selected from the oxides ... | 01/12/1993 |
| 5112892 | Method for the production of an asymmetric semipermeable membrane from a solution of a sulfonated polyarylethersulfone A polymer solution contains a sulphonated polyarylethersulphone in a solvent mixture containing at least three components, where the solvent mixture has a delta-H in the range from 3 to 8.5; a delta-P in the range from 4 to 8 and a delta-D in the range 7.... | 05/12/1992 |
| 5066776 | Process for the manufacture of polyarylene sulphides The invention concerns a process for the manufcture of polyarylene sulphides from alkali sulphide and aromatic dihalogen compounds, whereby the alkali sulphide is produced in situ.... | 11/19/1991 |
| 5030672 | Membranes An asymmetric membrane formed from a sulphonated polyarylethersulphone has a salt rejection of at least 99%. Alternatively, a membrane has a good salt rejection and an acceptable water flux such that the ratio ##EQU1## has the value of at least 0.7. ... | 07/09/1991 |
| 4973663 | Poly(cyano arylene sulfide/sulfone)copolymer and preparation thereof A novel thermoplastic poly(arylene thioether) copolymer which may be cross-linked is provided. The copolymer may be prepared by reacting a dihalogenobenzonitrile, a dihalogenophenyl sulfone and a thioetherifying agent in a suitable organic solvent.... | 11/27/1990 |
| 4965338 | PBT with improved tracking resistance The properties of polyesters, in particular the tracking index and the antistatic properties, can be improved by the addition of a salt of an alkane sulphonic acid.... | 10/23/1990 |
| 4942218 | Process for the preparation of polymers having an inorganic backbone The present invention provides a method of making a polymer by reacting, in the absence of water, an organic compound having the general formula R-H wherein R represents an organo radical having at least one unsaturated carbon-carbon bond and H is covalen... | 07/17/1990 |
| 4920193 | Membranes An asymmetric membrane formed from a sulphonated polyarylethersulphone has a salt rejection of at least 99%. Alternatively, a membrane has a good salt rejection and an acceptable water flux such that the ratio ##EQU1## has the value of at least 0.7. ... | 04/24/1990 |
| 4739018 | Polycarbon sulphide polymers Polycarbon sulphide derivatives comprise units (Rx CSm)n in which R represents hydrogen, an alkali metal or a transition metal, x is the degree to which R is present in the carbon-sulphur structure, m is the degree of substitution w... | 04/19/1988 |
