| 摘要 |
Capped polyphenylene ethers or mixtures thereof prepared by reacting polyphenylene ethers composed of the following units wherein Q1 and Q2 are hydrocarbyl radicals having 1 to 10 carbon atoms, Q3 and Q4 are hydrogen or hydrocarbyl radicals having 1 to 10 carbon atoms with from about 0.5 to about 10% by weight, relative to the polyphenylene ethers, of imides of the general formula and/or wherein R1 is aromatic or saturated aliphatic radical having 1 to 20 carbon atoms, R2 and R3 are aromatic or saturated aliphatic radical having 1 to 12 carbon atoms, R4 is (CH2)m where m is from 3 to 11 and n is from 1 to 3. The reaction is carried out at a temperature of from 230.degree. to 330.degree.C, preferably in the melt. The capping components are neither aggressive nor corrosive. The resulting capped polyphenylene ethers have increased oxidative and thermal stability and are useful as components of molding compositions.
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