Process for polylithiating unsaturated polymers
US3976628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 6, 1970 |
| Grant date | Aug 24, 1976 |
| Priority date | — |
| Expiry date | Jan 6, 1990 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/42
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A polymer is metalated with a lithiating reagent and an tetraalkylethylene, the ratio of active lithium atoms in the lithiating reagent to the molecules of the amine being from 0.01 to 1.5. Such lithiated polymer may then be further reacted to introduce reactive groups of many varieties along the polymer chain. For example, polybutadiene, polyisoprene and other unsaturated polymers may be reacted with butyl lithium and triethylene diamine; and the lithiated polymer may then be reacted with carbon dioxide, and the resulting product may be neutralized to produce a polymer containing carboxyl groups, or the lithiated polymer may be reacted with styrene or a mixture of styrene and butadiene, or styrene and isoprene, etc.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.