Process for producing acrylonitrile polymer melt employing H{HD 2{B O{HD 2 {B polymerization catalyst at a temperature of at least 80{20 {0 C containing 3{14 80% water in the system

摘要

An improved process for producing an acrylonitrile melt by polymerizing acrylonitrile alone or a monomer mixture consisting of at least 75% of acrylonitrile and as the remainder at least one different ethylenically unsaturated compound in a system where water is present in an amount from 3 to 80% by weight based on the total amount of the monomer(s) and water, under a pressure above the self-generated pressure at a temperature above 80 DEG C. The improvement is characterized by the use of hydrogen peroxide as the polymerization initiator.