| abstract |
A PROCESS FOR THE PREPARATION OF STABLE, AQUEOUS COPOLYMER DISPERSIONS OF ETHYLENE AND VINYL ESTERS, PARTICULARLY VINYL ACETATE, CONTAINING FROM 5 TO 50% BY WEIGHT OF ETHYLENE BY EMULSION POLYMERIZATION IN THE PRESENCE OF REDOX CATALYST, PROTECTIVE COLLIODS AND/OR EMULSIFIERS, CHARACTERIZED IN THAT THE MONOMER TOGETHER WITH THE TOTAL AMOUNT OF THE REDUCING AGENT IS CHARGED TOGETHER WITH AUXILIARY AQUEOUS DISPERSION AGENTS. THEN A PEROXIDE COMPONENT IS DOSED-IN SO THAT A CONSTANT POLYMERIZATION TEMPERATURE IS MAINTAINED BETWEEN 0 AND 100* C. AND THE COOLING CAPACITY OF THE REACTION VESSEL IS UTILIZED. |