Double metal cyanide catalysts containing cyclic, bidentate complexing agents
US6013596A · kind A · utility
10Cited by
18References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 18, 1998 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | May 18, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J27/26
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Double metal cyanide (DMC) catalysts and methods for making them are disclosed. The catalysts comprise a DMC compound, an organic complexing agent, and optionally, a functionalized polymer. The key component is the complexing agent, which comprises a C.sub.3 -C.sub.5 aliphatic alcohol a cyclic, bidentate compound selected from lactams and lactones. Polyether polyols made from the catalysts contain reduced levels of high-molecular-weight (Mn greater than 400,000) components and consistently perform better in urethane applications such as flexible and molded foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.