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US 5,204,442 AGranted
Polyether polymers derived from 4,4"-dihydroxy-m-terphenyls
AssigneeGeneral Electric Company
InventorSusan A. Nye
Life of this patent
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Abstract
Polyether polymers are prepared from 4,4"-dihydroxy-m-terphenyls, especially the unsubstituted dihydroxyterphenyl, by reaction under alkaline conditions with bis(4-halophenyl) sulfones, 4,4'-dihalobenzophenones or gem-dihaloalkanes. Both homopolymers and copolymers with other dihydroxyaromatic compounds, particularly bisphenol A, may be prepared. They have glass transition temperatures higher than those of the corresponding bisphenol A-derived polymers.
Claims19
A polymer comprising structural units of the formula ##STR4## wherein:
- Z is ##STR5## each R.sup.1 is independently a substituent which is inert under conditions of reactive contact with alkyl or aryl halides;
- each of R.sup.2 and R.sup.3 is hydrogen, C.sub.1-4 primary or secondary alkyl or phenyl;
- and
- each x is independently 0-4.
1 more element
Dependencies are inferred from the claim text.