PROCESS FOR THE BULK POLYMERIZATION OF ACRYLONITRILE

• Main Authors: MELACINI P,IT, MORETTI A,IT, PATRON L,IT, TEDESCO R,IT
• Format: Patent
• Language: English
• Published: 28.06.1974
• Edition: 1
• Subjects: 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

Improvements in the object of the main patent no. 390,618, for "Procedure for the mass polymerization of acrylonitrile", characterized by: a) polymerizing acrylonitrile, alone or in mixture with at most 50 mol%, of at least one other ethylenically unsaturated copolymerizable monomer, according to a continuous or semi-continuous polymerization process; b) employing a root catalytic system that has a decomposition rate constant (Kd) greater than 1 h-1, at the polymerization temperature; c) employing a reaction time or residence time (Q) sufficient for at least half-decomposition of the catalyst; and d) employing a catalyst concentration (C) equal to at least 2.10-3.Q moles per liter (where Q is the reaction time in hours), according to the related application (main patent 390,618), The improvement consists in that 2,2'-azo-bis- (2-methyl-4-methyl-4-methoxy-valeronitrile) is used as the radical catalyst with a decomposition rate constant (Kd) greater than 1 h1. (Machine-translation by Google Translate, not legally binding)