Th. Goldschmidt Ag

Roland Berger

Hans-Ferdi Fink

Christian Weitemeyer

Gotz Koerner

Otto Klocker

Wernfried Heilen

Dietmar Schaefer

Roland Sucker

Peter Muss

Jaroslav Langner

Heinz Dumm

Hubert Holthoff

Polyoxyalkylene-polysiloxane block copolymers are disclosed which exhibit an outstanding defoaming action and have the special advantage of not causing wetting defects when dispersions defoamed therewith are applied on a 2-dimensional substrate. Dispersions of polymeric organic substances, especially dispersions of vehicles, coating agents and adhesives are defoamed by the addition of 0.01 to 2.0% by weight, based on the dispersion to be defoamed, of a polyoxyalkylene-polysiloxane block copolymer of the formula,

Method for defoaming aqueous dispersions of polymeric organic substances

A composition useful for defoaming and/or deaerating liquid organic systems, such as crude oil, hydraulic oil, lacquer, varnish and paint is disclosed. The composition comprises

Defoaming and deaerating composition and method

Disclosed are pour point depressants of the general, average formula ##STR1## in which R.sup.1 is alkyl with 18 to 36 carbon atoms with the proviso, that at least 40% of the alkyl groups have at least 22 carbon atoms,

Crude oil with a depressed pour point

Compounds of the general formula ##STR1## wherein R.sup.1 is alkyl with 1 to 8 carbon atoms,

Method for improving the scratch resistance and increasing the sliding

Polysiloxanes of the general formula ##STR1## wherein R.sup.1 is the same or different and represents alkyl or phenyl,

New fluorine-containing siloxanes, their synthesis and use as defoaming

Alkoxysiloxanes of the general formula ##STR1## are disclosed wherein R.sup.1 is methyl or ##STR2## and/or ##STR3## the sum of the units a being 0 to 100, the sum of the units b being 0 to 15, with the proviso that the ratio of methyl to alkoxy groups in R.sup.1 is less than 50:1, and that b.gtoreq.1 when a=0 and a.gtoreq.5 when b=0. The compounds may be synthesized by known methods from halogen- or alkoxysiloxanes, the alkoxy group of which has 1 to 4 carbon atoms. The compounds are effective deaerating agents for curable resins and plastisols. The invention is also directed to compositions containing the novel deaerating compounds as well as to methods for deaerating coating systems.

Siloxanes, their synthesis and use as deaerating agents for curable

The use of fluorinated norbornylsiloxanes of the general formula ##STR1## in which R is a hydrocarbon radical with 1 to 6 carbon atoms or a phenyl radical;

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Bochum, Germany

Roland Berger