Patent · US Expired

Defoamer preparation and processes for its production

US4274977A · kind A · utility

25Cited by

2References

10Claims

0Family size

Assignee

Th. Goldschmidt. AG · DE

Inventors

Gotz Koerner · Essen, DE
Hans-Ferdi Fink · Essen, DE

Key dates

Filing date	Sep 28, 1978
Grant date	Jun 23, 1981
Priority date	—
Expiry date	Sep 28, 1998

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L83/10
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A defoamer composition having a high dispersion stability composed of a water-insoluble defoamer oil, a water-soluble emulsifier which is insoluble in the defoamer oil, and a mixture of a finely divided hydrophobic and hydrophilic silica. The composition of the present invention allows for the production of exceptionally stable dispersions thereof. A method for preparing the composition is also disclosed.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.