Nano-scale DMC catalyst particles
US7645717B2 · kind B2 · utility
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Key dates
| Filing date | May 21, 2004 |
| Grant date | Jan 12, 2010 |
| Priority date | — |
| Expiry date | Feb 28, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J35/45
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Nano-scale DMC catalyst complexes are highly active alkylene oxide polymerization catalysts. Thy show a greatly improved ability to catalyze the formation of EO-capping onto secondary hydroxyl-terminated polyethers. The catalysts can be prepared by precipitation in the dispersed adequous phase of a water-in-oil emulsion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.