High molecular weight polytriazines of soluble polymeric N-cyano-isourea ethers
US4066577A · kind A · utility
9Cited by
3References
5Claims
0Family size
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Key dates
| Filing date | Jul 22, 1976 |
| Grant date | Jan 3, 1978 |
| Priority date | — |
| Expiry date | Jul 22, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G73/0655
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
High molecular weight temperature-resistant polymers of polytriazine structure obtained by heating cyanamides of the formula I EQU r -- (nh-cn).sub.n in which R represents an aliphatic, cycloaliphatic, heterocyclic or aromatic radical, optionally interrupted by oxygen and n is a number from 2 to 5, with polyfunctional, aromatic cyanic acid esters into a fusible or in organic solvents soluble polymeric N-cyano-isourea ether and completing the reaction at elevated temperatures and optionally in the presence of a catalyst to form said polymer of polytriazine structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.