Moulding materials (I) are claimed, contg. (A) 50-95 wt.% polyarylene ether, (B) 5-50 wt.% block copolycondensate of (B1) polyarylene ether blocks and (B2) thermotropic polyester blocks, and (C) 0-40 wt.% additives etc.. Pref. (I) contains 70-95 wt.% (A), 5-30 wt.% (B) comprising 2-50 wt.% (B1) blocks and 50-98 wt.% (B2) blocks, and 0-40 wt.% (C). (A) is a polymer with repeating units of formula (II), or a statistical copolymer or block copolymer thereof; t, q = 0, 1, 2 or 3; T, Q = SO2, O, S, CO, N=N, SO, -RaC=CRb-, direct bond or CRcRd (with Ra, Rb = H or 1-6C alkyl and Rc, Rd = H, 1-6C alk(ox)yl or aryl opt. substd. with F and/or Cl); Z = SO2, CO, -RaC=CRb-, SO or N=N; Ar, Ar1 = 6-14C aryl, opt. substd. 1-8C alkyl, 6-20C aryl, 1-8C alkoxy or halo. USE/ADVANTAGE - Used for the prodn. of fibres, film and moulded prods. (claimed). Also claimed are fibres, film and moulded prods. obtd. from (I). Compared with prior-art mixts. of polyacrylene ethers and thermotropic polyesters, (I) have a better balance of good flow properties and mechanical properties, esp. high heat distortion pt. and good rigidity; (I) are therefore suitable for the prodn. of fine-structured mouldings, esp. for electrical and electronic components.
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