Chain-extending phenolic end-capped polyimides

Patent

Description

Aromatic polyimides with phenolic end groups are chain-extended (molecular weight increased) by reacting them with formaldehyde, compounds capable of generating formaldehyde under the reaction conditions or hexamethylene tetramine in the presence of a catalytic amount of lime. These polyimides can be shaped and formed prior to the chain-extending. The aromatic polyimides appropriate for chain-extending are formed by the reaction of aromatic dianhydrides, aromatic diamines and phenolic compounds such as aminophenol.

Attributes

Attribute NameValues
Title
  • Chain-extending phenolic end-capped polyimides

Patent Number
  • US 4026871 B2

USPTO Link
Inventor
  • Gaetano Francis D'Alelio

Inventor From Local Institution
  • Gaetano Frank D'Alelio

Other Application
  • 05/558,451

Claims
  • 18

Classification (US Patent)
  • 528/125; 525/422; 525/424; 525/429; 525/436; 525/925; 525/928; 528/126; 528/127; 528/128; 528/149; 528/150; 528/170; 528/172; 528/180; 528/188; 528/222; 528/223; 528/225; 528/229; 528/312; 528/319; 528/322; 528/351; 528/352;

Cooperative Patent Classification codes
  • C08G 18/6438 (20130101); C08G 73/1003 (20130101); C08G 73/1071 (20130101); C08G 73/1067 (20130101); C08G 73/1064 (20130101)

International Patent Classification codes
  • C08G 18/00 (20060101); C08G 73/00 (20060101); C08G 73/10 (20060101); C08G 18/64 (20060101); C08G 073/10 ()

Language
  • eng

Date Issued
  • 1977-05-31

Publisher
  • United States Patent and Trademark Office

Assignee
  • University of Notre Dame Du Lac

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