Abstract: The invention relates to highly crystalline, rapidly crystallizing, thermoplastic materials of polyphenylene sulphides and sulphonic acid esters.

Abstract: The invention relates to a process for the isolation of polyarylene sulphides, polyarylene sulphides with particularly low electrolyte content being obtained.

Abstract: A block copolymer composed of polyphenylene sulfide segments and aromatic sulfide sulfone polymer segments and having a logarithmic viscosity [.eta.], determined at 206.degree. C. for its solution in alpha-chloronaphthalene in a polymer concentration of 0.4 g/100 ml of solution and calculated in accordance with the equation [.eta.]=ln (relative viscosity)/polymer concentration, of 0.03 to 1.0. A resin composition comprising the block copolymer and polyphenylene sulfide and/or an aromatic sulfide sulfone polymer and optionally a filler. The block copolymer and the resin composition have improved mechanical strength and are suitable, for example, for encapsulation of electronic component parts.

Abstract: This invention relates to optionally branched polyarylene sulphides and a process for the production thereof in a polar solvent, from 0.2 to 100 mole %, based on the aromatic dihalogen compounds, of an amino acid being added to the reaction mixture.

Abstract: Poly(arylene sulfide) oligomers are recovered in a process comprising steps of:(a) dehydration of an aqueous admixture of alkali metal hydroxide such as sodium hydroxide, and alkali metal bisulfide such as sodium bisulfide, in a polar organic solvent such as N-methyl-2-pyrrolidone (NMP), wherein the molar ratio of alkali metal hydroxide to alkali metal bisulfide is about 0.90:1 to about 1.05:1 prior to dehydration and 0.99:1 to about 1.

Abstract: Polyphenylene-sulfide having a much reduced content of impurities is prepared by adding an inorganic acid or organic acid to a slurry of polyphenylene-sulfide as-obtained by condensation reaction of an aromatic polyhalide compound with an alkali metal sulfide in the presence of a polar organic solvent, to adjust the pH of the slurry to a value not higher than 6, stirring the pH-adjusted slurry, filtering the slurry, and washing and drying the recovered solid.

Abstract: A method for producing mercaptan terminated liquid polymers with increased chemical reactivity and reduced odor is disclosed which involves heating the polymeric liquid material under conditions which avoid oxidation and depolymerization of the material while removing at least 50 weight percent of low molecular weight mercaptan compounds to produce a stripped polymer material having an increased cure rate and reduced obnoxious mercaptan odor.

Abstract: A poly(arylene sulfide) coating composition, method of preparing the composition, and method of coating are disclosed. The composition comprises a finely-divided poly(arylene sulfide) having from about 75 to about 99 mole percent para-polymerized aromatic units and from about 1 to about 25 mole percent ortho- or meta- polymerized aromatic units and, optionally, from about 0.1 to about 2 mole percent trifunctionally-polymerization aromatic units. The coating resin can be prepared in a polymerization reaction medium containing a molar excess of base, with respect to sulfur present, and can be washed with water at at least about 100.degree. C. to lower the curing temperature of the coating composition. The compositions are particularly suited for application in which curing temperatures of 350.degree. C. or lower are desired.

Abstract: A readily crystallizable arylenesulfide resin composition is produced by adding, to 100 parts by weight of an arylenesulfide polymer, 0.01 to 10.0 parts of an organic acid or organic acid anhydride having a high boiling or melting point such as 2,6-naphthalene dicarboxylic acid, and then heating the mixture to a temperature not lower than the melting point of the polymer. The resulting resin composition is characterized in that its crystallization from its glass state and molten state is very rapid, in that it forms very fine spherulite structures, and in that it has a high degree of crystallization, a very crystallizable character, and other desirable characteristics.

Abstract: The invention provides a novel efficient method for the preparation of a polyarylene sulfide or, typically, polyphenylene sulfide by the reaction of an alkali metal sulfide, e.g. Na.sub.2 S, and a polyhalogenated aromatic compound, e.g. 1,4-dichlorobenzene. The improvement in the inventive method comprises performing the reaction in a heterogeneous reaction mixture comprising water and a polyethyleneglycol having a relatively high molecular weight, namely an average molecular weight of from 2,000 to 20,000, and not freely miscible with water. The product polymer is outstandingly free from salt impurities, e.g. sodium chloride, as a byproduct of the reaction. When a low molecular polyethyleneglycol is added to the reaction mixture in combination with the above mentioned high molecular polyethyleneglycol, a remarkable catalytic effect is obtained to accelerate the reaction and increase the yield of the desired polymer product.

Abstract: Compositions comprising a poly(arylene sulfide) which crystallizes to a fine-grained crystalline morphology are provided. A method is also provided for treating compositions comprising a poly(arylene sulfide) by incorporation of a crystalline morphology altering additive, heating the resulting mixture above the melting point of the poly(arylene sulfide) and cooling the mixture at a rate of less than 50.degree. C. per minute. Exemplary additives include a poly(arylene sulfide-ketone) and a polyaryl ketone.

Abstract: A block copolymer comprising a polyphenylenesulfide portion and a polysulfone portion, and having a logarithmic viscosity [.eta.] in the range of 0.03 to 1.0, said logarithmic viscosity [.eta.] being a value calculated by the following equation from a relative viscosity measured at 206.degree. C. for a solution of a polymer in .alpha.-chloronaphthalene in a polymer concentration of 0.4 g/100 ml.[.eta.]=ln (relative viscosity)/polymer concentration;and a resin composition comprising a block copolymer composed of a polyphenylenesulfide portion and a polysulfone portion, polyphenylenesulfide and/or polysulfone, and if required, a filler.

Abstract: Additives for rubber compositions, giving vulcanisates having improved retention of optimum physical properties, are polymeric trithiocarbonates having a structure comprising repeating units of the formula ##STR1## where R is an organic bridging group, e.g. an alkylene group.

Abstract: The invention relates to mono- and biaxially drawable films of a specific polyphenylene sulphide.

Abstract: A process for preparing a polyarylene sulfide which comprises reacting an alkali metal sulfide compound and a polyhalo-substituted aromatic compound in an organic polar solvent in the presence of(A) an alkali metal salt of a phenolic aromatic sulfonic acid of the formula:(HO).sub.m --Ar--(SO.sub.3 M).sub.nwherein Ar is a di- to tetravalent aromatic group having 6 to 24 carbon atoms; M is an alkali metal; and m and n are each 1 or 2,(B) an alkali metal hydroxide and/or an alkali metal alcoholate, and optionally,(C) an alkali metal salt of sulfuric acid.

Abstract: This invention relates to a process for the preparation of high molecular weight, optionally branched polyarylene sulphides. These may be prepared from alkali metal sulphides and aromatic halogen compounds in a polar organic solvent in the absence of water.

Abstract: This invention relates to optionally branched polyarylene sulphides and a process for the production thereof in a polar solvent, from 0.2 to 100 mole %, based on the aromatic dihalogen compounds, of an amino acid being added to the reaction mixture.

Abstract: Zinc oxide is used in poly(arylene sulfide compositions to improve encapsulation properties and to inhibit color shift. The invention includes electronic components encapsulated with poly(arylene sulfide) compositions containing zinc oxide.

Abstract: A novel phenylenesulfide resin composition comprises(I) a poly-p-phenylenesulfide,(II) a poly-m-phenylenesulfide, and(III) a phenylenesulfide block copolymer consisting essentially of a repeating unit ##STR1## (A) and a repeating unit ##STR2## (B), wherein from 20 to 5,000 units on the average of the repeating units (A) linked together exist in the molecular chain in the form of the block component, and wherein the molar faction (X) of the repeating unit (A) is in the range of 0.10 to 0.95, the mixing ratio of the three components (I), (II) and (III) being in a specified range. The composition is characterized by compatibility between the components (I) and (II), whereby transparency, physical properties and other characteristics thereof are markedly enhanced.

Abstract: A process for the production and use of branched polymers of arylene sulfide in which (A) a reaction mixture of (1) at least one p-dihalo-benzene, (2) at least one alkali metal sulfide, (3) at least one organic amide, (4) water in an amount of about 1.0 mole to about 2.

Abstract: An aromatic polysulfone ether/polythioether sulfone copolymer having the formula: ##STR1## wherein each of R.sup.1 and R.sup.2 which may be the same or different, is hydrogen, halogen or a hydrocarbon group having from 1 to 8 carbon atoms, each of a and b which may be the same or different, is an integer of from 0 to 4, Ar is a bivalent aromatic residue selected from the group consisting of: ##STR2## wherein each of R.sup.3, R.sup.4 and R.sup.5 which may be the same or different, is hydrogen, or a hydrocarbon group having from 1 to 8 carbon atoms, each of c to e which may be the same of different, is an integer of from 0 to 4, Y is a single bond, --O--, --S--, --SO--, --SO.sub.2 --, ##STR3## wherein R is hydrogen or a hydrocarbon group having from 1 to 6 carbon atoms, and each of m and n is an integer indicating the degree of polymerization and m:n is from 1:20 to 20:1, said copolymer having an inherent viscosity .eta..sub.inh of from 0.1 to 1.5 as measured at 30.degree. C.

Abstract: The invention relates to fibres and filaments of special new polyarylene sulphides.

Abstract: By maintaining an arylenesulfide prepolymer with a melt viscosity of 5 to 3,000 poise at a temperature of 245.degree. to 290.degree. C. under a liquid-liquid two-phase separated state in a solvent for 1 to 50 hours, the molecular weight of said prepolymer is increased to a high to ultra-high value while the linearity of the polymer is retained.

Abstract: The isolation of polyarylene sulphides by freeing polyarylene sulphides of the type obtained in customary production processes from adherent water and any other volatile constituents by treating the polyarylene sulphides in screw machines and optionally melting them either simultaneously or subsequently.

Abstract: This invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulphides from alkali metal sulphides and halogenated aromatic compounds in the presence of from 0.5 to 100 mol %, based on the molar quantity of aromatic dihalogen compounds, of an ester or anhydride of a carboxylic acid.

Abstract: A biaxially oriented crystalline poly(p-phenylene sulfide) film wherein said polymer contains at least 90 mole % of recurring units of the formula ##STR1## and has a melt viscosity of at least 0.12 dl/g and when said film is heat-treated at 270.degree. C. for 10 minutes under relaxation and then stretched at 23.degree. C. at a rate of 200%/min., its tensile strength, stress at 5% stretch and elongation show a percent retention of at least 60%, at least 80%, and 80 to 120%, respectively, based on these properties of the same film which has been stretched under said conditions without the heat-treatment; and a process for producing a crystalline poly(p-phenylene sulfide) film, which comprises heat-treating a biaxially oriented amorphous poly(p-phenylene sulfide) film at a temperature in the range of from 3.degree. C. above its melting point measured by a differential scanning calorimeter to 350.degree. C. at a constant length or under tension or in a moderate relaxed condition.

Abstract: Novel polyarylenesulfide complexes are obtained by reacting a polyarylenesulfide with 0.05 to 20 mols of at least one strongly basic metal compound per 100 mols of arylenesulfide groups contained in the polyarylenesulfide under a uniformly dispersed condition, and have the properties defined in the following (A) through (C):(A) .eta.*/.eta..sub.0 *=3 to 100, wherein the .eta.* and .eta..sub.0 * stand for melt viscosities of the complex and the starting polyarylenesulfide, respectively;(B) .DELTA.T.sub.c2 =(T.sub.c2).sub.0 -T.sub.c2 =10 to 100.degree. C., wherein T.sub.c2 and (T.sub.c2).sub.0 stand for crystallization temperaturs of the complex and the starting polyarylenesulfide, respectively, observed when the polyarylenesulfide is cooled from its moten state; and(C) .DELTA.(.DELTA.E)=.DELTA.E-(.DELTA.E).sub.0 =5 to 75 kcal/mol, wherein .DELTA.E and (.DELTA.E).sub.0 stand for apparent flow activation energies of the complex and the starting polyarylenesulfide, respectively.

Abstract: Disclosed herein are inert monovalent hydrocarbon terminated polysulfide copolymers having the general structure ##STR1## wherein n is an integer from about 2 to about 8, l is zero or a positive integer, m is a positive integer, each R is independently an organic polyradical with the radicals residing on carbon atoms, p is zero or a positive integer which is the difference between the number of radicals on R and 2, and each Y is a terminal substituent that is an inert monovalent hydrocarbon radical.

Abstract: The invention relates to a process for the production of polyarylene sulphides with functional end groups.

Abstract: A polyarylene sulfide is prepared in a reaction mixture containing a dihaloaromatic compound, a sulfur source, a polar organic compound and an alkali metal or alkaline earth metal dithionite. The presence of dithionite in the reaction mixture enables the production of polymer and products therefrom having a reduced Tmc and enhanced heat stability.

Abstract: This invention relates to a process for the production of polyarylene sulphides with functional end groups.

Abstract: The present invention relates to a process for the production of high molecular weight, optionally branched polyarylene sulphides. These can be produced in a polar organic solvent in the absence of water in a reaction vessel cascade comprising from two to six reaction vessels.

Abstract: This invention relates to a process for the preparation of high molecular weight, optionally branched polyarylene sulphides. These may be prepared in polar organic solvents in the absence of water, substances containing water being dehydrated in the reaction mixture before the reaction.

Abstract: A method for affecting the crystallization of poly(phenylene sulfide), i.e., lowering the melt crystallization temperature or lowering the rate of crystallization of the polymer, in which phenylene sulfide polymer is contacted with polyvalent metal cations in solution, preferably aqueous at a temperature and for a time sufficient to affect the crystallization of the polymer.

Abstract: This invention relates to a new process for the preparation of optionally branched polyarylene sulphides from optionally substituted halogen benzenes in admixture with aromatic polyhalogen compounds and alkali metal sulphides in polar solvents in the presence of thio salts.

Abstract: Polyvinylene sulfide is prepared in a high yield by reacting 1,2-dichloroethylene with sodium sulfide in the presence of dimethyl sulfoxide.

Abstract: Poly(phenylene sulfide) (PPS) copolymers and terpolymers can be made infusible or thermoset by first treating with hydrogen peroxide followed by heating above the melting temperature of the polymers.

Abstract: A method is described for producing electrically-conductive paths in poly(arylene sulfide) and other polymers exhibiting differing receptivity to chemical doping agents depending upon the crystallinity of the polymer structure. Conductivity is selectively induced in amorphous regions by contacting the amorphous regions with a doping agent in solution. Selected areas of crystalline polymers are made amorphous by heat or solvent treatment.

Abstract: A novel polyvinylene chalcogenide of the formula: --CH.dbd.CH--L).sub.n wherein L is S or Se, is provided. This compound is prepared by reacting an ethylene dihalide of the formula: XHC.dbd.CHX' (X and X' are selected from F, Cl, Br and I) with an alkali metal chalcogenide or bichalcogenide.

Abstract: The improvement in a process for producing an aromatic sulfide polymer from (A) hydrous sulfide of an alkali or alkaline earth metal and (B) a dihalo-aromatic compound is disclosed. The improvement is concerned with how the hydrous sulfide is dehydrated and comprises dehydrating the hydrous sulfide by the action thereon of (C) an alkaline earth metal oxide before substantial formation of the aromatic sulfide polymer.

Abstract: The invention relates to a process for the production of optionally branched polyarylene sulfides by reacting dihalogen benzenes in admixture with aromatic polyhalogen compounds and alkali sulfides in polar solvents, the reaction being carried out in the presence of reducing agents.

Abstract: This invention relates to a new process for the production of optionally branched polyarylene sulphides from optionally substituted halo-benzenes in admixture with polyhalogen aromatic compounds and alkali sulphides in polar solvents in the presence of disulphide compounds.

Abstract: A method for continuously treating arylene sulfide polymer by passing the polymer through an extruder operated at conditions to produce mixing action at a temperature above the melting point of the polymer while contacting an amount of oxygen sufficient to produce a reduction of melt flow within a fixed residence time in the extruder.

Abstract: This invention relates to a new process for the production of optionally branched polyarylene sulphides from optionally substituted halogen benzenes in admixture with aromatic polyhalogen compounds and alkali metal sulphides in polar solvents, with the addition of reducing agents and other polyhalogenated compounds.

Abstract: Granular poly(arylene sulfide) is recovered from a slurry comprising granular poly(arylene sulfide), polar organic solvent, alkali metal halide, poly(arylene sulfide) oligomers, untreated reactants in the water by heating the slurry under conditions to evaporate polar organic solvent, water and volatile impurities at a temperature below the normal boiling point of the polar organic solvent to produce a dry mixture containing poly(arylene sulfide), poly(arylene sulfide) oligomers and alkali metal halide which is then reslurried with water to produce a reslurried mixture containing aqueous alkali metal halide solution and dispersed poly(arylene sulfide) oligomers with the reslurried mixture being filtered through a coarse screen to recover granular poly(arylene sulfide) thereon and pass a filtrate containing poly(arylene sulfide) oligomers and aqueous alkali metal halide solution therethrough.

Abstract: A process for obtaining an aromatic sulfide polymer which has a markedly high molecular weight and can be readily formed into films, fibers, and other structures. The process comprises heating, to a temperature of 100.degree. to 270.degree. C. in an organic solvent under the coexistence of a very small amount of water, a dihaloaromatic compound and a substantially anhydrous amorphous vitreous compound composed of (i) S.sup.2- anions and other inorganic salt-forming anions and (ii) ions of an alkali metal and/or an alkaline earth metal.

Abstract: Phenol is extracted with a chlorinated aromatic extractant, such as p-dichlorobenzene, from an aqueous mixture containing phenol and N-methylpyrrolidone. In an embodiment of this invention the purified N-methylpyrrolidone is recycled for use in a poly(phenylene sulfide) polymerization process.

Abstract: A method for purifying polyphenylene sulfide containing impurities mainly comprising an electrolytic component, which comprises heat-treating said polyphenylene sulfide in an organic solvent in the presence of an oxyalkylene compound thereby to reduce the amount of said impurities.

Abstract: Tetrafluoroethylene is reacted in an aqueous environment with hydroxyl radicals, generating a mixture of water soluble and water insoluble .alpha.,.omega.-perfluorodicarboxylic acids.

Abstract: This invention relates to a process for the production of optionally branched polyarylene sulphides in piperazinones as solvent.