Method for the production of a polymer dispersion by radical aqueous emulsion polymerization with a continuously produced aqueous monomer emulsion
AssigneeBASF SE
InventorsAndreas Keller, Sven Lawrenz, Gerhard Bauer, Jürgen Schmidt-Thümmes, Reinhard Bächer, Jürgen Hartmann, Chung-Ji Tschang
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Abstract
A polymer dispersion is prepared by free radical polymerization of an aqueous monomer emulsion by a process in which the monomer emulsion is prepared continuously at the rate of consumption.
Claims20
A process for the preparation of a polymer dispersion by free radical polymerization of an aqueous monomer emulsion, wherein the monomer emulsion is prepared continuously at the rate at which it is consumed, and wherein the components of the monomer emulsion are mixed in at least one mixing apparatus to give the emulsion, and further wherein an inline mixer in combination with a static mixer, is used as the mixing apparatus.
A process for the preparation of a polymer dispersion by free radical polymerization of an aqueous monomer emulsion, wherein the monomer emulsion is prepared continuously at the rate at which it is consumed, and wherein the components of the monomer emulsion are mixed in at least one mixing apparatus to give the emulsion and further wherein the mixing apparatus used is a curved tubular apparatus which has an essentially circular or ellipsoidal cross-section and comprises a plurality of curves with alternating direction of curvature, a change in the direction of curvature occurring at the latest when that section of the center of gravity of the tube cross-sectional area flowed through from the beginning of a curve is 200 times the tube diameter, and it being possible for a curve to comprise up to three revolutions about the axis of curvature.
A process as claimed in 2, wherein the components of the monomer emulsion are fed in at one point or at different points along the apparatus.
A process for the preparation of a polymer dispersion by free radical polymerization of an aqueous monomer emulsion having an aqueous continuous phase, wherein the monomer emulsion is prepared continuously at the rate at which it is consumed.
Dependencies are inferred from the claim text.