Polymerizing bis-maleimides

Patent

Description

Processes for increasing the molecular weight of bis-maleimides are provided. The bis-maleimides are reacted with certain cyclic dienes to form reversible adducts. These adducts, upon elimination of the cyclic diene, yield an extension of the bis-maleimides to higher molecular weight polymers, ultimately to thermally stable, infusible polymers. The process can be interrupted to yield tractable polymers which are also convertible to cross-linked, infusible products. Modifications of the process include preparing the adducts in the presence of aprotic solvents as well as Bronsted acid salt catalysts, and the isolation of intermediate solid products.

Attributes

Attribute NameValues
Title
  • Polymerizing bis-maleimides

Patent Number
  • US 4118377 B2

USPTO Link
Inventor
  • Gaetano Francis D'Alelio

Inventor From Local Institution
  • Gaetano Frank D'Alelio

Other Application
  • 05/497,490

Claims
  • 15

Classification (US Patent)
  • 526/236; 526/234; 526/256; 526/258; 526/262; 526/270; 526/89;

Cooperative Patent Classification codes
  • C08G 73/12 (20130101); C08G 73/127 (20130101); C08G 73/126 (20130101); C08G 73/125 (20130101)

International Patent Classification codes
  • C08G 73/00 (20060101); C08G 73/12 (20060101); C08G 073/12 ()

Language
  • eng

Date Issued
  • 1978-10-03

Publisher
  • United States Patent and Trademark Office

Assignee
  • University of Notre Dame Du Lac

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