Patent · US Expired

High-whiteness hydrophobic precipitated silica with ultralow moisture absorption

US7022375B2 · kind B2 · utility

22Cited by

14References

68Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Uwe Schachtely · New York, US
Christian Panz · Wesseling, DE
Ralf Schmoll · Gerolzhofen, DE

Key dates

Filing date	Aug 5, 2002
Grant date	Apr 4, 2006
Priority date	—
Expiry date	Dec 27, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K2200/0247
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to hydrophobicized precipitated silicas that possess an extremely high whiteness and extremely low moisture absorption. The hydrophobic precipitated silicas are prepared, inter alia, by coating with silicone oil and oxidative heat treatment.

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