Patent · US Expired

High molecular weight polytriazines of soluble polymeric N-cyano-isourea ethers

US4059567A · kind A · utility

10Cited by

4References

2Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Rudolf Sundermann · New Martinsville, US
Gunther Rottloff
Ernst Grigat

Key dates

Filing date	Jul 22, 1976
Grant date	Nov 22, 1977
Priority date	—
Expiry date	Jul 22, 1996

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08G73/0655
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.