Double metal cyanide catalysts containing functionalized polymers
US5714428A · kind A · utility
69Cited by
18References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 16, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Oct 16, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/26
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Double metal cyanide (DMC) catalysts useful for epoxide polymerizations are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and from about 2 to about 80 wt. % of a functionalized polymer or a water-soluble salt derived from the polymer. The catalysts are easy to prepare and isolate, are substantially non-crystalline, and have high activity for polymerizing epoxides. Polyols made from the catalysts have exceptionally low unsaturations, low viscosities, and reduced levels of high molecular weight polyol tail.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.