Patent ID: 7244812
Filing Date: 2007-07-17
Classification: C08F

Abstract:
1. A process for reducing the amount of residual monomers in aqueous polymer dispersions by chemical aftertreatmcnt, comprising: treating an aqueous polymer dispersion containing residual monomers with a redox system which consists essentially of a) from 0.005 to 5% by weight based on the total weight of all monomers used for the preparation of the polymer dispersion, of at least one oxidizing agent based on an organic peroxide from the class consisting of the b) from 0.005 to 5% by weight, based on the total weight of all monomers used for the preparation of the polymer dispersion, of at least one reducing agent from the group consisting of the sulfinic acids and the salts thereof having the structure in which M is hydrogen, NH in which R and optionally sodium sulfite and/or sulfonic acid derivates which cannot eliminate any formaldehyde.