C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
400/3040, 400/48
C08L 51/04 (2006.01) C08G 65/46 (2006.01) C08J 3/00 (2006.01) C08L 25/04 (2006.01) C08L 71/12 (2006.01)
Patent
CA 1205594
Abstract of the Disclosure: 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, halohydro- carbons, 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 com- prises not less than two and not more than four working- up stages. The evaporation is carried out in general at from 120 to 280°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.
407664
Echte Adolf
Hambrecht Juergen
Heil Eduard
Hinselmann Klaus
Naarmann Herbert
Basf Aktiengesellschaft
Robic Robic & Associes/associates
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