Heat-resistant polycarbonate resins containing 2-alkyl-3,3-bis(p-hydroxyphenyl)phthalimide

A synthetic polymeric resin containing recurring or repeating polycarbonate chain units of the formula:

• ##STR14## wherein R represents an alkyl having 1 to 12 carbon atoms;
• said chain units being interrupted by second chain units of formula:
• ##STR15## wherein D is a divalent aromatic moiety of formula:
• ##STR16## wherein A is a divalent hydrocarbon radical containing from 1 to about 15 carbon atoms;
• a substituted divalent hydrocarbon radical containing from 1 to about 15 carbon atoms and halogen;
• --S--;
• --SS--;
• --S(O)--;
• --S(O).sub.2 --;
• --O--;
• or --C(O)--;
• each X is independently selected from the group consisting of halogen and a monovalent hydrocarbon radical selected from the group consisting of an alkyl group of from 1 to about 8 carbon atoms, and aryl of from 6-18 carbon atoms, an aralkyl group of from 7 to about 14 carbon atoms, an alkaryl group of from 7 to about 14 carbon atoms, an alkoxy group of from 1 to about 8 carbon atoms, and an aryloxy group of from 6 to about 18 carbon atoms;
• and m is zero or 1 and n is an integer of from 0 to 5.