Polyether-containing double metal cyanide catalysts
US5545601A · kind A · utility
102Cited by
13References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 22, 1995 |
| Grant date | Aug 13, 1996 |
| Priority date | — |
| Expiry date | Aug 22, 2015 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2531/96
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Improved double metal cyanide (DMC) catalysts are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and from about 5 to about 80 wt. % of a polyether polyol that has tertiary hydroxyl groups. Compared with other DMC catalysts, those of the invention have excellent activity for epoxide polymerization, and they can be used to make polyols having very low unsaturation even at high epoxide polymerization temperatures.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.