Anionic polymerization of cis- and trans-1,3-pentadiene from a mixture of saturated and unsaturated hydrocarbons
US4482771A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 8, 1983 |
| Grant date | Nov 13, 1984 |
| Priority date | — |
| Expiry date | Dec 8, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/045
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
1,3-Pentadiene is polymerized in an inert gaseous atmosphere from a mixture of saturated and unsaturated hydrocarbon molecules. At least 50 percent by weight of said molecules have 5 carbon atoms. An anionic polymerization initiator in conjunction with an organic polar solvent is used to effect polymerization. Cyclopentadiene, active hydrogen compounds and other polymerization-terminating compounds may be inactivated and separated from the mixture of hydrocarbon compounds before starting polymerization. As an alternative, inactivation and separation of cyclopentadiene, active hydrogen compounds and polymerization-terminating compounds may be omitted provided the anionic polymerization initiator is employed in an amount to (a) inactivate such compounds and (b) initiate polymerization of 1,3-pentadiene. The polymer of 1,3-pentadiene so prepared is then hydrogenated or functionalized by further reaction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.