Synthesis of polyphosphazenes with controlled molecular weight and polydispersity
US5698664A · kind A · utility
9Cited by
6References
31Claims
0Family size
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Key dates
| Filing date | Apr 26, 1995 |
| Grant date | Dec 16, 1997 |
| Priority date | — |
| Expiry date | Apr 26, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G79/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process for the preparation of polyphosphazenes is provided that includes the cationic solution polymerization reaction of a phosphoranimine, using a main group or transition metal halide, or other appropriate halide salt, including a linear phosphazene salt of any chain length, or a preformed nonphosphazene polymer containing a main or transition metal chloride, as an initiator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.