FOERFARANDE FOER ELIMINERING AV POLYMERAVLAGRING PAO INRE YTOR AV ETT POLYMERISATIONSREAKTIONSKAERL

FOERFARANDE FOER ELIMINERING AV POLYMERAVLAGRING PAO INRE YTOR AV ETT POLYMERISATIONSREAKTIONSKAERL

A method of preventing or retarding polymer build-up on the internal surfaces of polymerization reactors is provided by this invention. Reduced build-up in vinyl chloride polymerization is obtained by having a phenolic compound coated on the internal surfaces of the reactor vessel and a water phase...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser: GARDNER, KEITH LESLIE
Format: Patent
Sprache:fin
Schlagworte:
CHEMISTRY
COMPOSITIONS BASED THEREON
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:A method of preventing or retarding polymer build-up on the internal surfaces of polymerization reactors is provided by this invention. Reduced build-up in vinyl chloride polymerization is obtained by having a phenolic compound coated on the internal surfaces of the reactor vessel and a water phase polymerization inhibitor either combined with the phenolic coating or added to the aqueous polymerization medium. Optionally, a chelating agent is also added with the water phase inhibitor. The process is further enhanced by the presence of water soluble dispersants such as polyvinyl alcohol and methyl cellulose.