Polymer product containing isobutylene oxide polyols
US5055496A · kind A · utility
2Cited by
3References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Dec 27, 2010 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2609
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Novel polyether polyols are disclosed which contain an internal block of isobutylene oxide or a mixture of isobutylene oxide and a mono- or unsaturated alkylene oxide and an end-cap of a mono- or unsubstituted alkylene oxide to provide reactive primary or secondary hydroxyl end-groups. The polyether polyols are useful intermediates in the production of segmented elastomers. A process for the preparation of the novel polyols is also described in which an alkali metal catalyst and a crown ether cocatalyst are employed to afford polyols containing relatively low levels of unsaturation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.