Polyphenylquinoxalines containing latent crosslinking groups

Abstract

Abstract Disclosed are polyphenylquinoxalines containing latent crosslinking groups, such as -CN, -OCN, -CNO and -C*CH groups, and processes for preparing and using same. These polymers can be prepared by reacting a bis(o-diamine) and a bis(1,2-dicarbonyl) compound containing latent crosslinking groups in a solvent such as m-cresol, anisole or chloroform. Alternatively, an aromatic bis(o-diamine) can be reacted with a bis (1,2-dicarbonyl) compound containing reactive hydroxyl groups, the resulting hydroxyl-containing polyphenylquinoxalines being then further reacted in a solvent such as N,N-dimethylacetamide with a modifying agent such as cyanogen bromide to provide polyphenylquinoxalines containing -OCN groups. Upon exposure of these polymers to elevated temperatures (optionally in the presence of a catalyst), they undergo crosslinking via the latent crosslinking groups, and become less thermoplastic or essentially non-thermoplastic. The polyphenylquinoxalines of this invention are particularly useful as adhesives, laminating resins, protective coatings, films and membranes for employment in environments requiring high chemical and thermal stability.

Inventors

• 👤 P Hergenrother

Bibliographic Details