Process for preparing capped polyoxyalkylene block polyethers
US4902834A · kind A · utility
24Cited by
10References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1988 |
| Grant date | Feb 20, 1990 |
| Priority date | — |
| Expiry date | Aug 30, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/3312
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A process is disclosed for the preparation of capped polyoxyalkylene block polyethers with exceptionally low hydroxyl numbers and correspondingly high capping efficiency. This improvement is accomplished through the use of cesium hydroxide catalysis during oxyethylation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.