Cyanic acid esters of aromatic polycarbonates
US4026913A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 1976 |
| Grant date | May 31, 1977 |
| Priority date | — |
| Expiry date | Mar 25, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G64/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A novel cyanic acid ester of an aromatic polycarbonate can be prepared by reacting an aromatic polycarbonate having one or two terminal hydroxyl groups with a cyanogen halide in an inert solvent at a temperature of -30.degree. to +65.degree. C in the presence of a base. Said cyanic acid ester and an admixture of said cyanic acid ester with other known cyanic acid ester, both of which may or may not contain a catalyst and/or other polymers are available for a coating material, a casting material, an adhesive or a molding material. When said cyanic acid ester or said admixture is cured, there is obtained a laminate, a film or a molded article. The cured products are rich in flexibility.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.