Isobutylene oxide polyols
US5003111A · kind A · utility
6Cited by
6References
31Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 14, 1989 |
| Grant date | Mar 26, 1991 |
| Priority date | — |
| Expiry date | Feb 14, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G65/2648
- 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.