The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1977
Filed:
Apr. 16, 1975
Max Gruffaz, La Mulatiere, FR;
Gerard Lefebvre, Lyon, FR;
Rhone-Poulenc Industries, Paris, FR;
Abstract
Polymers possessing imide groups having excellent heat resistance and chemical inertness are disclosed. They are prepared by reacting cyanamide and a product possessing imide groups selected from: A. a bis-imide of the general formula: ##STR1## in which Q represents a divalent radical of the formula: ##STR2## WHEREIN Y represents H, CH.sub.3 or Cl and m is 0 or 1, and A represents a divalent organic radical containing 2 to 30 carbon atoms; and B. a mixture comprising a said bis-imide and a mono-imide of the general formula: ##STR3## in which Q is as defined above and R represents a hydrogen atom or a monovalent organic radical containing 1 to 20 carbon atoms.