Increasing the reactivity of coupling homopolymers
US4452952A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 17, 1983 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Jun 17, 2003 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F36/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
There is disclosed a process for the preparation of elastomeric polymers which comprises contacting at least one conjugated diolefinic monomer selected from the group consisting of isoprene, piperylene, 2-ethyl-1,3-butadiene, 2,3-dimethyl-1,3-butadiene and 1,3-butadiene, mixed with at least one polyvinyl aromatic coupling compound selected from the group consisting of o, m and p-divinylbenzene, 1,2,4-trivinylbenzene, 1,8-divinylnaphthalene, 1,2-divinyl-3,4-dimethylbenzene, 2,4-divinylbiphenyl, 3,5,4'-trivinylbiphenyl and 1,3,5-trivinylbenzene under solution polymerization conditions with an organolithium catalyst, in which the amount of polyvinyl aromatic coupling compound employed contains from about 0.1 to about 10 moles of vinyl groups per mole of active lithium catalyst used to produce a living polymer and then subsequently contacting said living polymer, with (A) a polar compound selected from the group consisting of ethylene glycol dimethyl ether (glyme), diethylene glycol dimethyl ether (diglyme), triethylene glycol dimethylether (triglyme), tetraethylene glycol dimethyl ether (tetraglyme), 2,3-dimethyoxybutane, N,N,N', N'tetramethylethylene-diamine (TMEDA), tri-n-butylphosp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.