Abstract: Heat-resistant resin composition comprising (A) 100 parts by weight of a poly(arylene sulfide) of a substantially linear structure containing 50% by weight or higher of recurring units of the formula ##STR1## and a logarithmic viscosity number of 0.1 to 1.0 dl/g; (B) from 0.01 to less than 25 parts by weight of a melt-stable poly(arylene thioether-ketone) having predominant recurring units of the formula ##STR2## wherein the --CO-- and --S-- are in the para position to each other, and having a melting point of 310.degree.-380.degree. C., a residual melt crystallization enthalpy of at least 10 J/g, a melt crystallization temperature of at least 210.degree. C. and a reduced viscosity of 0.2 to 2 dl/g; and (C) at least one of fibrous fibers and/or at least one of inorganic fillers in a proportion of 0 to 400 parts by weight per 100 parts by weight of the resin component comprising said poly(arylene sulfide) and said poly(arylene thioether-ketone).

Abstract: The present invention discloses a polyarylene thioether of high crystallizing rate having a necessary time for 50% crystallization of not more than 50 seconds upon crystallization of a molten polymer at 250.degree. C. as well as a production process therefor.

Abstract: Disclosed herein is a composition of polyarylene thioether prepared by combining 0.001 to 10 parts by weight of kaoline of the mean particle diameter of 0.03 to 2 .mu.m with 100 parts by weight of polyarylene thioether having the repeating unit of ##STR1## as the main constituent. The composition of polyarylene thioether has a high crystallization rate and forms a minute spherulite structure. Moreover, the composition having a short molding cycle at the time of melt molding, generates a small amount of the flash and gives the molded products excellent in mechanical properties.Disclosed herein also is a composition prepared by further combining an inorganic filler and/or a fibrous filler with the above-mentioned composition of polyarylene thioether.

Abstract: Disclosed herein is a polyarylene thioether composition comprising: 100 parts by weight of a polyarylene thioether (A) which contains not less than 70 wt % of a repeating unit of ##STR1## and 0.01 to 15 parts by weight of a polyarylene thioether (B), which is a nucleating agent and contains not less than 50 wt % of a repeating unit of ##STR2## as the main constituent and has a melting point of not lower than 290.degree. C. or a melt crystallization temperature of not lower than 220.degree. C. This composition may further comprise 0.1 to 300 parts by weight of an inorganic filler and/or a fibrous filler. A 50% crystallization time, t.sub.1/2, at 250.degree. C. of the polyarylene thioether composition is not more than 1/1.5 of the 50% crystallization time of a polyarylene thioether which does not contain the polyarylene thioether (B) Accordingly, its melt molding cycle is short and its molded product has a high strength.

Abstract: A polyarylene thioether composition comprising (1) 100 parts by weight of a polyarylene thioether (A) having an average particle size of spherulites of not more than 2 .mu.m, formed upon crystallization of the molten polymer at 250.degree. C., obtained by treating a polyarylene thioether having a repeating unit of ##STR1## as the main constituent and an inherent solution viscosity, which is measured at 206.degree. C. in 1-chloronaphthalene at a polymer concentration of 0.4 g/100 ml solution, of 0.30 to 0.90 dl/g with an aqueous solution of non-oxidative strong acid or non-oxidative strong-acid-weak-base type salt; and (2) 11 to 800 parts by weight of a polyarylene thioether (B) having a necessary time for 50% crystallization of not more than 50 seconds upon crystallization of the molten polymer at 250.degree. C. obtained by treating a polyarylene thioether having a repeating unit of ##STR2## as the main constituent and an inherent solution viscosity, which is measured at 206.degree. C.

Abstract: In the process of chemical plating on a formed article composed of a polyarylene sulfide or a composition comprising a polyarylene sulfide as the predominant resin component, a method for selective chemical plating is provided, which comprises irradiating a portion not to be plated of the formed article with light of a wavelength of 0.1 nm to 800 nm and then subjecting the formed article to chemical plating.

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.