Patent ID: 6740691
Filing Date: 2004-05-25
Classification: C08F

Abstract:
A process for treating an aqueous polymer dispersion prepared by polymerizing at least one or more monomeric materials to a degree of conversion of at least 98% comprising the steps of:A. adding to the polymer dispersion a sufficient amount of at least one reducing agent in one or more portions followed by adding at least one free radical generator in such a way that at least the bulk of the reducing agent has been added before addition of free radical generator is started and maintaining the dispersion at a suitable temperature for a period of time which is sufficient to reduce the VOC-level of the dispersion to below 1,100 ppm after which B. water vapour and/or gas is/are fed into the dispersion whilst the temperature of the dispersion is maintained at a suitable temperature for a period of time which is sufficient to decrease the VOC-level to below 200 ppm.