Patent · US Active

Hydrophilic silica as filler for silicone rubber formulations

US9725326B2 · kind B2 · utility

1Cited by

12References

15Claims

0Family size

Assignee

EVONIK DEGUSSA GMBH · DE

Inventors

Gottlieb-Georg Lindner · Wesseling, DE
Michael Kempf · Rodenbach, DE

Key dates

Filing date	Jul 3, 2009
Grant date	Aug 8, 2017
Priority date	—
Expiry date	Sep 22, 2031

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/2982
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Provided is a hydrophilic precipitated silica which is well suited to use in silicone rubber formulations (RTV-1, RTV-2, HTV and LSR), particularly well suited to use in HTV silicone rubber formulations. It has a BET surface area of 185˜260 m2/g, a CTAB surface area of 100˜160 m2/g, a BET/CTAB ratio of 1.2˜2.6, and a conductivity of <250 μS/cm. Also provided are a process for producing the precipitated silica and the use of the precipitated silica for thickening and reinforcing silicone rubber formulations.

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