Method for polymerizing dienic monomers
US4090015A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 25, 1977 |
| Grant date | May 16, 1978 |
| Priority date | — |
| Expiry date | Jul 25, 1997 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F2/004
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
In the emulsion polymerization of a dienic monomer or a mixture containing a dienic monomer and at least one other copolymerizable monomer in an aqueous medium, the deposition of polymer scale on the inner walls of the polymerization reactor and other surfaces in contact with the monomer or monomeric mixture can be remarkably reduced or prevented by providing coating layers of an organopolysiloxane on those surfaces, prior to the polymerization, by applying the organopolysiloxane directly to the surfaces or by applying one or a mixture of hydrolyzable organosilanes to the surfaces, followed by hydrolysis-condensation of the silanes, to form the organopolysiloxane in situ.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.