SiO.sub.2 flatting agent, process for its production and its use

Details SiO.sub.2 flatting agent, process for its production and its use SiO.sub.2 flatting agent, process for its production and its use

1991-11-01

1993-06-22

Brunsman, David

Compositions: coating or plastic

Coating or plastic compositions

Fat, fatty oil, fatty oil acid or salt thereof containing

106489, 106491, 106245, 106253, 10628726, 10628734, C09D19100, C09D 712

Patent

active

052213374

ABSTRACT:
A universally applicable SiO.sub.2 -flatting agent is described, which consists of SiO.sub.2, 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 SiO.sub.2, polyol and wax can be brought together in a variety of ways, e.g. during the micronization of the SiO.sub.2 in a jet-mill or mechanical mill by adding polyol and wax at the same time, by spray-drying a suspension of SiO.sub.2 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 SiO.sub.2, wax emulsion and polyol.

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"Resinotes 31", 1979. Cray Valley Products, Inc. pp. 1-3 (no month).
"CVP Thixotropic," Cray Valley Products Limited, Farnborough, England, Nov. 1988, pp.: cover, 1 and 3.

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