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US 4,543,416 AGranted
Di(phthalic anhydride) derivatives of di(disubstituted phenol) sulfones
AssigneeGeneral Electric Company
InventorEdward N. Peters
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Abstract
Novel di(phthalic anhydride) derivatives of di(dialkylphenol) sulfones of the following formula are disclosed: ##STR1## These dianhydrides can be reacted with organic diamines to form novel polyetherimide polymers having particularly beneficial properties.
Claims4
A compound of the formula
- wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 independently selected from the group consisting of lower alkyl of from 1 to about 10 carbon atoms;
- aryl of from 6 to about 15 carbon atoms;
- aralkyl, wherein the alkyl portion contains from 1 to about 5 carbon atoms and the aryl portion contains from 6 to about 10 carbon atoms;
- halogen;
- lower alkoxy of from 1 to about 10 carbon atoms, and aryloxy of from 6 to about 15 carbon atoms.
2 more elements
Dependencies are inferred from the claim text.