Linear phosphine-borane polymers and methods of preparation therefor
US6372873B1 · kind B1 · utility
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6References
5Claims
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Key dates
| Filing date | Apr 3, 2000 |
| Grant date | Apr 16, 2002 |
| Priority date | — |
| Expiry date | Apr 3, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K21/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Linear backbone phosphorus-boron polymers of the general formula (I): wherein R1, R2, R3, and R4, are the same or different and selected from H, optionally substituted alkyl, alkenyl and phenyl; and n is at least 2, and particularly high molecular weight polymers of absolute weight average molecular weight of at least 10,000. The polymers are of use as fire retardants.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.