Th. Goldschmidt Ag

Peter Zaske

Gerd Rossmy

Gotz Koerner

Rolf-Dieter Langenhagen

Helmut Lammerting

Hermann Hoffmann

Heinz Theile

This invention relates to an emulsion-breaking composition comprising about 70 to 99.8% by weight of at least one silicon-free demulsifier, and about 0.2 to 30% by weight of a mixed polyoxyalkylene-polysiloxane block polymerizate, the polyoxyalkylene blocks of which have a molecular weight of about 500 to 4000 and are composed of polyoxyethylene and polyoxypropylene blocks in a weight ratio of 40 to 60 to 100:0, and the polysiloxane blocks of which contain 3 to 50 silicon atoms per block. The invention also includes a process for breaking emulsions using the novel emulsion-breaking composition.

Use of demulsifying mixtures for breaking petroleum emulsions

In the disclosed foaming process for manufacturing soft polyurethane foams on the basis of polyethers containing at least two hydroxy groups, the foaming is carried out in the presence of selected low-molecular weight, low-viscosity methylpolysiloxanes which do not cause disorders in the boundary regions of the foam or shrinkage.

Process for the manufacture of highly elastic soft polyurethane foams

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Essen-Bredeney, Germany

Peter Zaske