Process for the preparation of polyether polyols with a reduced unsaturation content
US5374705A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 27, 1993 |
| Grant date | Dec 20, 1994 |
| Priority date | — |
| Expiry date | Dec 27, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2651
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polyether polyols are by reacting an alkylene oxide comprising propylene oxide with an initiator containing at least three active hydrogen atoms per molecule. The reaction is conducted in the presence of an alkoxylation catalyst which is barium, strontium and their oxides, hydroxides, hydrated hydroxides or monohydroxide salts, or mixtures thereof; and in the presence of from about 1 to about 10 weight percent, based on total weight of initiator, of a processing aid that is an organic monohydroxyl- or dihydroxyl-containing substance having a molecular weight of at least 30, or a mixture thereof. The processing aid enhances the ability to obtain polyether polyols having a reduced unsaturation content.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.