公开(公告)号：CA1205594A

公开(公告)日：1986-06-03

申请号：CA407664

申请日：1982-07-20

Applicant: BASF AG

Inventor： HINSELMANN KLAUS ,  NAARMANN HERBERT ,  ECHTE ADOLF ,  HEIL EDUARD ,  NIKLES ALBERT ,  REFFERT RUDI W ,  HAMBRECHT JUERGEN

IPC: C08L7/00 ,  B29C35/00 ,  B29C45/00 ,  C08G65/46 ,  C08J3/00 ,  C08J3/20 ,  C08L21/00 ,  C08L23/00 ,  C08L33/00 ,  C08L33/02 ,  C08L71/00 ,  C08L71/12 ,  C08L101/00 ,  C08L71/04 ,  C08L25/04 ,  C08L51/04

Abstract: Molding materials containing high molecular weight polyphenylene ethers are produced by a process in which a solution of a polyphenylene ether in an organic solvent, together with another polymer, is freed of solvent by multi-stage evaporation. The solvent is preferably an aromatic compound from the class comprising the hydrocarbons, halohydrocarbons, ethers or esters, the ratio of the other polymer to the polyphenylene ether is advantageously from 99 : 1 to 20 : 80 parts by weight, the other polymer is, in particular, a homopolymer or copolymer of styrene or of a homolog thereof, which may be modified with rubber, and the multi-stage evaporation process preferably comprises not less than two and not more than four workingup stages. The evaporation is carried out in general at from 120 to 280.degree.C and under a pressure of from 1 to 3,000 mbar, advantageously in the presence of assistants which reduce the partial pressure, eg. water and/or methanol.