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:
Nov. 22, 1977
Filed:
Jul. 22, 1976
Rudolf Sundermann, New Martinsville, WV (US);
Gunther Rottloff, Cologne, DT;
Ernst Grigat, Odenthal-Gloebusch, DT;
Bayer Aktiengesellschaft, , DT;
Abstract
Polyfunctional aminophenols or amino(alkyl)phenols are converted with cyano halide in the presence of a base at temperatures below 65.degree. C into the corresponding aromatic cyanic acid esters containing cyanamide groups and thereafter at 65.degree. C to 150.degree. C into prepolymers which are soluble in organic solvents and highly stable in storage. The prepolymers may be converted into high molecular weight polymers of triazine structure by heating to 150.degree. C to 350.degree. C. The end products are insoluble in solvents and are infusible. The prepolymers may be used for the production coatings, shaped articles or laminates.