Aminated, alkoxylated hydroxyl-terminated polybutadienes
US4994621A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1989 |
| Grant date | Feb 19, 1991 |
| Priority date | — |
| Expiry date | Apr 17, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G18/696
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Aminated, alkoxylated hydroxyl-terminated polymers are made by a process involving first polymerizing one or more unsaturated hydrocarbons, such as butadiene, to form a liquid polymer. Next, the liquid polymer is provided with terminal hydroxyl groups. Then, the hydroxylated liquid polymer is alkoxylated with one or more alkylene oxides, such as ethylene oxide, propylene oxide, butylene oxide, and mixtures thereof, to provide secondary terminal hydroxyl groups. Finally, the alkoxylated liquid polymer is aminated over a transition metal oxide catalyst, such as a combination of nickel oxide/copper oxide/chromium oxide. If the alkoxylated, hydroxyl-terminated liquid polymer is terminated with primary hydroxyl groups, then the amination does not proceed well.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.