Water-dilutable emulsion polymerisate, process for producing...

C - Chemistry – Metallurgy – 08 – F

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C08F 246/00 (2006.01) C08F 257/02 (2006.01) C08F 291/00 (2006.01) C09D 5/02 (2006.01) C09D 17/00 (2006.01) C09D 151/00 (2006.01) C09D 157/04 (2006.01)

Patent

CA 2120723

- 21 - Abstract The present invention relates to water-dilutable emulsion polymers prepared by multistep emulsion polymerization. To this end, (a1) 0.5 to 5.0 % by weight of ethylenically un- saturated monomers containing carboxyl groups, and (a2) from 0.5 to 2.5 % by weight of olefinically unsaturated carboxamides, where a total of from 1.0 to 8.0 % by weight of hydro- philic ionic and hydrophilic nonionic olefinically unsaturated monomers are employed, and (b) from 92.0 to 99.0 % by weight of further ethylenically unsaturated monomers containing no further functional groups, are polymerized in the first step of the emulsion polymerization, where the total amount of monomers in the first step is 100 % by weight, and exclusively olefinically unsaturated monomers containing no further functional groups are polymerized in the second step of the emulsion polymerization, and the weight ratio between the monomers polymerized in the first step and the monomers polymerized in the second step is from 30 - 80 % : 20 - 70 % by weight. The emulsion polymers are preferably used of [sic] the grinding resin for pigment resins, [sic], dispersion resins and as binders in physically drying aqueous lacquers for metallic surfaces, wood and mineral substrates.

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