Phosphazenium salt and preparation process thereof, and process for producing poly(alkylene oxide)
US5990352A · kind A · utility
13Cited by
3References
11Claims
0Family size
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Key dates
| Filing date | Feb 5, 1997 |
| Grant date | Nov 23, 1999 |
| Priority date | — |
| Expiry date | Feb 5, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2675
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A salt useful as an active species in an organic reaction and represented by the following chemical formula (1): ##STR1## wherein n stands for an integer of from 1 to 8, Z.sup.n- represents an n-valent anion of an active hydrogen compound, a, b, c and d each stands for a positive integer, and Rs represent the same or different hydrocarbon groups. In addition, a simple and efficient process is provided for producing a poly(alkylene oxide) by polymerizing an alkylene oxide compound in the presence of the salt represented by the chemical formula (1).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.