The Goodyear & Tire Rubber Company

Frank A Cich

Edwin Studley Smith

Richard A Marshall

Emmett Jean Glazer

This invention relates to a method for the removal of vinyl chloride monomer from polyvinyl chloride resins by lowering the Tg (glass transition temperature) of the polyvinyl chloride resins at an elevated temperature while in the presence of reduced pressure thus allowing the vinyl chloride monomer to escape from the polyvinyl chloride resins.

Method of removing vinyl chloride monomer from polyvinyl chloride resins

A method of achieving chain transfer in the polymerization of a vinyl chloride monomer to polyvinyl chloride, utilizing aldehydes of 3 to 6 carbon atoms as the chain transfer agent and treating the polymerization mixture with an alkali bisulfite, such as sodium bisulfite or potassium bisulfite solution after the vinyl chloride monomer has been stripped from the polymerization mixture to obtain modified polyvinyl chloride having improved compounded physical properties.

Growing community of inventors

Norton, OH, United States of America

Frank A Cich