Patent · US Active

Precipitated silica for thickening and creating thixotropic behavior in liquid systems

US7985292B2 · kind B2 · utility

1Cited by

14References

22Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Christian Panz · Wesseling, DE
Karl Meier · Bornheim, DE
James R. Toth · Ann Arbor, US
Guido Titz · Heimbach, DE
Matt Romaine · Willingboro, US
Mario Scholz · Zöblitz, DE

Key dates

Filing date	Nov 26, 2007
Grant date	Jul 26, 2011
Priority date	—
Expiry date	Sep 20, 2028

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/259
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A precipitated silica having a d50-value of from 150 to 2000 nm, a d90-value of from 500 to 7000 nm, a silanol group density of from 2.5 to 8 OH/nm2, and a modified tapped density of less than or equal to 70 g/l is useful for thickening and providing thixotropy in liquid systems and shows superior efficiency at thickening and creating thixotropy compared to existing grades of precipitated silica. The precipitated silica functions best as a thixotrope in non-polar or intermediate polar liquid systems such as unsaturated polyester (UPE) resin systems.

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