In-situ anionic continuous dispersion polymerization process
US5891947A · kind A · utility
54Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1993 |
| Grant date | Apr 6, 1999 |
| Priority date | — |
| Expiry date | Oct 18, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F297/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a process for the dispersion copolymerization of 35 to 70% by weight of vinyl substituted aromatic monomer and 30 to 65% by weight of conjugated diene monomer comprising carrying out the copolymerization in a reaction mixture containing a liquid aliphatic hydrocarbon dispersing medium, an anionic catalyst system, and an "A" block of a copolymer dispersing agent, the dispersing agent having at least two polymer blocks wherein at least one of the polymer blocks is soluble in the dispersing medium and at least another of the polymer blocks is insoluble in the dispersing medium and is formed in situ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.