Poly (alkylene oxide) prepared in the presence of a phosphazenium salt or compound
US6936684B2 · kind B2 · utility
1Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2003 |
| Grant date | Aug 30, 2005 |
| Priority date | — |
| Expiry date | May 22, 2024 |
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): wherein n stands for an integer of from 1 to 8, Zn− 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.