Abstract: The invention is drawn to a polyarylene sulfide resin composition for optical communications parts, containing a polyarylene sulfide resin (A) having a melt viscosity of 8 to 20 Pa·s as measured at 300° C. and a shear rate of 500/sec and spherical silica (B) having a mean particle size of 3 to 25 &mgr;m and containing silica particles having a particle size of 1 &mgr;m or less in an amount of 50 wt. % or less based on the entire amount of the silica, the component (A) content being 15 wt. % or more and less than 20 wt. % and the component (B) content being more than 80 wt. % and 85 wt. % or less, based on the sum of the weights of the components (A) and (B). According to the invention, a polyphenylene sulfide resin composition suitably used for forming optical communications parts such as optical fiber connector ferrules and sleeves can be provided.

Abstract: Provided is a polyarylene sulfide resin composition for sealing electronic parts, which comprises (A) from 20 to 35% by weight of a polyarylene sulfide resin, (B) from 60 to 75% by weight of silica, and (C) from 1 to 10% by weight of an elastomer, and contains (D) from 0.05 to 1.2 parts by weight of an epoxysilane and/or (E) from 0.1 to 3 parts by weight of an epoxy resin, both relative to 100 parts by weight of the total amount of the components (A), (B) and (C). The composition has good PCT and TCT acceptable quality and good fluidity, naturally having good properties intrinsic to ordinary PAS resin, and which, when used for sealing electronic parts, causes neither deformation of bonding wires and other elements nor package breakdown, and is therefore favorable to materials for sealing electronic parts.

Abstract: Provided is a polyarylene sulfide resin composition comprising (A) from 20 to 34% by weight of a polyarylene sulfide having a melt viscosity of from 150 to 800 poises, (B) from 66 to 80% by weight of spherical silica having a mean particle size of from 0.3 to 10 &mgr;m, and (C) from 0 to 12% by weight of whiskers, in which the total of the spherical silica (B) and the whiskers (C) falls between 66 and 80% by weight. The composition has well-balanced physical properties of dimensional accuracy and mechanical strength, and has good moldability. It is favorable to moldings for precision members such as optical fiber connector ferrules, etc.

Abstract: Provided is a polyarylene sulfide (PAS) resin composition having extremely high dimensional accuracy and favorable to fiber-optics connector members, etc. The PAS resin composition for optical telecommunication members comprises (A) from 20 to 35% by weight of a polyarylene sulfide having a crystallization temperature, as measured through differential scanning calorimetry, of not lower than 250° C., and (B) from 65 to 80% by weight of silica, preferably spherical silica having a mean particle size of from 1 to 10 &mgr;m.

Abstract: Provided is a polyarylene sulfide resin composition comprising (A) from 20 to 34% by weight of a polyarylene sulfide having a melt viscosity of from 150 to 800 poises, (B) from 66 to 80% by weight of spherical silica having a mean particle size of from 0.3 to 10 &mgr;m, and (C) from 0 to 12% by weight of whiskers, in which the total of the spherical silica (B) and the whiskers (C) falls between 66 and 80% by weight. The composition has well-balanced physical properties of dimensional accuracy and mechanical strength, and has good moldability. It is favorable to moldings for precision members such as optical fiber connector ferrules, etc.

Abstract: Provided is a filter favorably used in high-temperature long-term exposure conditions, for example, in coal boilers, cupola furnaces for steel and cast iron production, cement kilns, aggregate drying furnaces, furnaces for non-iron metals, etc. For the filter, provided are a filter material comprising a web or a web and its support, which contains a polycyanoaryl ether in an amount of not smaller than 5% by weight relative to the weight of the filter material; and a filter material comprising a substrate of polycyanoaryl ether fibers or of polycyanoaryl ether fibers and other organic fibers, and a web of at least one type of fibers selected from polycyanoaryl ether fibers and other organic fibers, wherein the amount of the polycyanoaryl ether fibers is not smaller than 5% by weight relative to the total weight of the substrate and the web.

Abstract: A polyarylene sulfide resin composition comprising (A) a polyarylene sulfide resin, (B) an aliphatic or saturated cyclic polycarbodiimide resin or a precursor thereof, and preferably (C) reactive silicone compound grains, and (D) a polyethylene naphthalate resin or (E) a filler, which improves excellent properties exhibited by polyarylene sulfide resins, and which is also endowed with an excellent adhesion characteristics to adhesives such as epoxy resins. In addition, a molded article obtained by molding a polyarylene sulfide resin composition endowed with such excellent properties is useful as a container for accommodating an electric component material. Such a molded article may also be used as an electronic component having conductive portions which are totally or partially accommodated in the container, wherein the conductive portions are seled by a sealant encapsulated in the container.

Abstract: Disclosed are slide members for parts to be in contact with magnetic tape, which are made of polyarylenesulfide resin compositions comprising from 20 to 40% by weight of a polyarylenesulfide resin optionally combined with an amorphous, thermoplastic resin, and from 60 to 80% by weight of calcium metasilicate whiskers having a mean fiber diameter of not larger than 5 .mu.m and a mean aspect ratio of not smaller than 5, optionally combined with an inorganic filler. While being shaped, the resin compositions have good fluidity. The slide members are used in electric and electronic devices as the parts to be in contact with magnetic tape, for example, as VTR cylinders (drums). The slide members have high mechanical strength and good dimensional stability, and have good slidability with magnetic tape.

Abstract: A polyarylene sulfide resin composition comprising as major components: (A) 100 parts by weight of a polyarylene sulfide resin; (B) 200-30 parts by weight of mica; (C) 150-30 parts by weight of carbon fiber; and (D) 30-0.5 parts by weight of conductive carbon black. Various parts with stable conductivity and high dimensional precision can be produced from this resin composition by one molding operation.

Abstract: A resin composition comprising (A) a polycyanoarylether consisting essentially of the repeating unit represented by the following general formula (I) ##STR1## and having a reduced viscosity of at least 0.6 dl/g as measured at 60.degree. C. in p-chlorophenol at a concentration of 0.2 g/dl and (B) a carbonized phenolic resin is suitable for sliding parts of electric and electronic instruments and machines because it exhibits excellent abrasion resistance and reduces the damage to counterparts. The sliding characteristics of the resin composition is further increased by addition of a non-fibrous solid lubricant.

Abstract: Disclosed is a novel polymer of this invention which comprises having a recurring unit represented by the formula: ##STR1## and having a reduced viscosity (.eta.sp/c) of 0.2 dl/g or more at 60.degree. C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol as a solvent, a method for preparing the same which comprises reacting a dihalogenobenzonitrile represented by the formula: ##STR2## wherein X represents a halogen atom, with an alkali metal salt of resorcin represented by the formula: ##STR3## wherein M represents an alkali metal, in the presence of a solvent, and then treating the reaction product obtained by water or alcohol, and molding materials and molded products employing the polycyanoaryl ether.

Abstract: Disclosed is a novel polymer of this invention which comprises having a recurring unit represented by the formula: ##STR1## and having a reduced viscosity (.eta.sp/c) of 0.2 dl/g or more at 60.degree. C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol as a solvent, a method for preparing the same which comprises reacting a dihalogenobenzonitrile represented by the formula: ##STR2## wherein X represents a halogen atom, with an alkali metal salt of resorcin represented by the formula: ##STR3## wherein M represents an alkali metal, in the presence of a solvent; and then treating the reaction product obtained by water or alcohol, and molding materials and molded products employing the polycyanoaryl ether.

Abstract: The present invention relates to a poly(cyanoarylether)based resin composition comprising 100 parts by weight of poly(cyanoarylether) having a repeating unit represented by the formula: ##STR1## (wherein Ar is ##STR2## as a main constitutional component and 0.01 to 3 parts by weight of at least one crystallization nucleating agent selected from the group consisting of talc, mica and carbon black each having a particle diameter of not more than 3 .mu.m.In the composition of the present invention, the rate of crystallization of poly(cyanoarylether) is greatly improved. Thus, the productivity of molding can be increased. Furthermore, the composition of the present invention can provide moldings having excellent heat resistance without annealing.

Abstract: Disclosed is a novel polymer of this invention which comprises having a recurring unit represented by the formula: ##STR1## and having a reduced viscosity (.eta.sp/c) of 0.2 dl/g or more at 60.degree. C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol as a solvent, a method for preparing the same which comprises reacting a dihalogenobenzonitrile represented by the formula: ##STR2## wherein X represents a halogen atom, with an alkali metal salt of resorcin represented by the formula: ##STR3## wherein M represents an alkali metal, in the presence of a solvent; and then treating the reaction product obtained by water or alcohol, and molding materials and molded products employing the polycyanoaryl ether.

Abstract: Disclosed is a novel polymer of this invention which comprises having a recurring unit represented by the formula: ##STR1## and having a reduced viscosity (.eta.sp/c) of 0.2 dl/g or more at 60.degree. C. in a solution of a concentration of 0.2 g/dl in p-chlorophenol as a solvent, a method for preparing the same which comprises reacting a dihalogenobenzonitrile represented by the formula: ##STR2## wherein X represents a halogen atom, with an alkali metal salt of resorcin represented by the formula: ##STR3## wherein M represents an alkali metal, in the presence of a solvent; and then treating the reaction product obtained by water or alcohol. and molding materials and molded products employing the polycyanoaryl ether.

Abstract: There are disclosed a novel copolymer comprising having recurring unit represented by the formula: ##STR1## wherein Y represents a phenylene group or a naphthylene group, with a recurring number of k and a recurring unit represented by the formula: ##STR2## wherein Ar represents a divalent aryl group, with a recurring number of l, a value of k/(k+l) is 0.5 to 0.97 and having a reduced viscosity [.eta..sub.sp/c ] of 0.3 dl/g or higher as measured in p-chlorophenol solution at a concentration of 0.2 g/dl at 60.degree. C.

Abstract: A process for preparing a polycyanoaryl ether powder which comprises;reacting at a temperature between 100.degree. and 350.degree. C. a dihalogenobenzonitrile with an alkali metal salt of at least one of hydroquinone and dihydroxydiphenyl in the presence of a solvent (i) selected from the group consisting of dimethyl sulfoxide, diethyl sulfoxide, sulfolane, N-methylpyrrolidone, N-methylacetoamide and N-methylformamide to form a reaction mixture containing a dissolved polycyanoaryl ether; andwhen the concentration of said dissolved polycyanoaryl ether in the reaction mixture is in the range of from 2 to 15% by weight, adding to said reaction mixture, a solvent (ii) which is miscible with said solvent (i) but which is not a solvent for said polycyanoaryl ether, said solvent (ii) being added in an amount of from 30 to 200% by volume based on the volume of said solvent (i) and said solvent (ii) being added at a temperature of from 10.degree. to 100.degree. C.

Abstract: A polycyano aryl ether which has recurring units each represented by the formula: ##STR1## and a reduced viscosity of which is 0.3 dl/g or more at 60.degree. C. in a solution in which the polycyanoaryl ether is dissolved in p-chlorophenol in a concentration of 0.2 g/dl.A method for preparing the above-mentioned polycyanoaryl ether which comprises reacting a dihalogenobenzonitrile represented by the formula: ##STR2## wherein X is a halogen atom, with an alkali metal salt of dihydroxynaphthalene represented by the formula: ##STR3## wherein M is an alkali metal, in the presence of a solvent.

Abstract: Polycyanoaryl ether stretched films and fibers prepared from polycyanoaryl ethers containing specific repeating units and number-average molecular weights or reduced viscosities by stretching molded films or melt-spinned fibers, said films and fibers having superior heat resistance and mechanical strength.