Sulfur dioxide for vapor phase elimination of styrene and acrylonitrile popcorn polymer in bulk san production
AssigneeGeneral Electric Company
InventorsJohn C. Wozny, Chen-Youn Sue, John E. Pace
Life of this patent
Estimating the term…
Abstract
A bulk or mass polymerization process is provided which involves bulk polymerization of vinyl monomers in a liquid phase in the presence of a nitrogen rich vapor phase containing amounts of sulfur dioxide effective to inhibit formation of popcorn polymer during the reaction. The process may be used as a step in the formation of polymer or may be used as the entire reaction process.
Claims6
A bulk polymerization process comprising reacting vinyl monomers in a liquid phase, said liquid phase comprising styrene and acrylonitrile, said liquid phase being in the presence of a vapor phase comprising diatomic nitrogen and sulfur dioxide, said sulfur dioxide being present at a level sufficient to inhibit popcorn polymer formation.
Dependencies are inferred from the claim text.