Polyphenylene ether capped with salicylic acid ester
AssigneeGeneral Electric Company
InventorsDwain M. White, Laura A. Socha
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Abstract
Polyphenylene ethers are capped by reaction in the melt with an ester of salicylic acid, anthranilic acid or a substituted derivative thereof; esters of salicylic acid, and especially salicylic carbonate and linear polysalicylates, are preferred. The capping reaction typically takes place at a temperature in the range of about 225.degree.-325.degree. C., employing about 5-12% by weight of the ester based on polyphenylene ether.
Claims20
A method for capping a polyphenylene ether which comprises reacting said polyphenylene ether in the melt with at least one ester of salicylic acid or a substituted derivative thereof.
A capped polyphenylene ether composition which comprises polymer molecules having end groups of at least one of the formulas ##STR21## ##STR22## wherein A is an unsubstituted or substituted o-phenylene radical;
- each Q.sup.1 is independently halogen, primary or secondary lower alkyl, phenyl, haloalkyl, aminoalkyl, hydrocarbonoxy, or halohydrocarbonoxy wherein at least two carbon atoms separate the halogen and oxygen atoms;
- and each Q.sup.2 is independently hydrogen, halogen, primary or secondary lower alkyl, phenyl, haloalkyl, hydrocarbonoxy or halohydrocarbonoxy as defined for Q.sup.1.
Dependencies are inferred from the claim text.