Aldehyde-telechelic polyisobutylenes, catalytic method for preparing the same with high conversion and selectivity, and block copolymers made therefrom
US5442015A · kind A · utility
24Cited by
4References
12Claims
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Key dates
| Filing date | Apr 13, 1994 |
| Grant date | Aug 15, 1995 |
| Priority date | — |
| Expiry date | Apr 13, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2810/40
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aldehyde-telechelic polyisobutylenes free of other end groups such as alcohols, olefins, etc., are made by the hydroformylation of polyisobutylene having one or more olefinic end groups in the presence of a rhodium catalyst in combination with an organic phosphorus ligand. Very high conversions of olefin to aldehyde are obtained. Depending upon the number of aldehyde end groups per macromolecule, the telechelic polyisobutylene polymers can be utilized as precursors to form various types of block copolymers, e.g., AB, ABA, or radial block copolymers, with other polymers such as polyurethanes, polyesters, polyamines, and the like.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.