Polymer mixture comprising a polyphenylene ether and a polyarylene sulphide

A polymer mixture comprising:

• (A) a polyphenylene ether;
• (B) a polyarylene sulphide;
• and
• (C) polycarboxylic acid compounds or derivative-compounds thereof, as agents to improve the homogeneity of components (A) and (B), said compounds or derivatives having the general formula:
• (R.sub.1 O).sub.m R(COOR.sub.2).sub.n (CONR.sub.3 R.sub.4).sub.s
• wherein R is a saturated hydrocarbon group having 2 to 20 carbon atoms with a linear or branched chain;
• R.sub.1 is a hydrogen atom or an alkyl group, aryl group, acyl group or carbonyldioxy group, each having 1 to 10 carbon atoms;
• each R.sub.2 independently of each other is a hydrogen atom or an alkyl group or aryl group, each having 1 to 20 carbon atoms;
• each R.sub.3 and R.sub.4 independently of each other represents a hydrogen atom or an alkyl group or aryl group, each having 1 to 10 carbon atoms;
• m is equal to 1 and (n+s) is larger than or equal to 2, and n and s each are larger than or equal to zero;
• and wherein (OR.sub.1) is in an alpha position or beta position with respect to a carbonyl group, and in which at least two carbonyl groups are separated by 2 to 6 carbon atoms.