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Polyimides comprising substituted benzidines

  • US 5,071,997 A
  • Filed: 07/20/1989
  • Issued: 12/10/1991
  • Est. Priority Date: 07/20/1989
  • Status: Expired due to Term
First Claim
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1. A polyimide which consists of 1 to 100 mole percent of the structural elements of the formula (II) ##STR10## where R is a tetravalent organic radical, each A is selected from the group consisting of a halogenated alkyl group, an aryl group and a substituted-aryl group.

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