Sio2-flatting agent, process for its production and its use

Details Sio2-flatting agent, process for its production and its use Sio2-flatting agent, process for its production and its use

C - Chemistry, Metallurgy

09

D

400/1705, 6/180,

C09D 5/04 (2006.01) C09C 1/30 (2006.01) C09D 7/00 (2006.01) C09D 167/00 (2006.01) C09D 191/06 (2006.01)

Patent

CA 2035675

- 21 - ABSTRACT A universally applicable SiO2-flatting agent is described, which consists of SiO2, 1 to 25 % by weight polyol and optionally 1 to 25 % by weight wax. The novel flatting agent is, even after lengthy storage, especially at pressure, still easily dispersible, does not lead to the formation of a hard sediment with non-thixotropic paints and lacquers, and has practically no negative effect on the thixotropic behaviour of paints and lacquers based on thixotropic polyamide-modified alkyd resins. The SiO2, polyol and wax can be brought together in a variety of ways, e.g. during the micronization of the SiO2 in a jet-mill or mechanical mill by adding polyol and wax at the same time, by spray-drying a suspension of SiO2 in an aqueous polyol solution or even before drying by adding polyol during washing or an earlier production step. It is also possible to spray-dry a suspension of SiO2, wax emulsion and polyol.

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