Patent ID: 6946529
Filing Date: 2005-09-20
Classification: C08F,Y10S

Abstract:
1. A process for preparing an aqueous polymer dispersion by free-radical emulsion polymerization of an aqueous monomer emulsion wherein said aqueous monomer emulsion is formed continuously at the rate of its consumption over a mixing means, wherein said mixing means comprises a baffle or a nozzle wherein said nozzle is at least one nozzle selected from the group consisting of a solid cone nozzle, a hollow cone nozzle, a fan jet nozzle, a smooth jet nozzle, an injector nozzle, an ejector nozzle, a spiral nozzle, an impingement jet nozzle, and a two-fluid nozzle, wherein said mixing means further comprises a mixing chamber; wherein the components of the aqueous emulsion are passed first through a nozzle then through the mixing chamber; and wherein there is at least a 5-fold replacement of the contents of the mixing chamber on average per hour.