Aromatic polycarbonates having reduced combustibility and methods for their preparation
US4645786A · kind A · utility
1Cited by
2References
12Claims
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Key dates
| Filing date | Aug 9, 1985 |
| Grant date | Feb 24, 1987 |
| Priority date | — |
| Expiry date | Aug 9, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S260/24
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polycarbonate-based compositions the fire-resistance of which is improved with small but effective amounts of a urazole salt having the formula: ##STR1## wherein R and R' are the same or different and are hydrogen, an alkyl group having from one to six carbon atoms, phenyl, or halosubstituted phenyl, and M is an alkali metal, many of such fire-resistive polycarbonates being transparent, together with method for preparing such fire-resistive polycarbonates.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.