Wacker Chemie Ag

Achim Schneider

Torsten Gottschalk-Gaudig

Modified precipitated silica is produced in a one pot synthesis by forming precipitated silica and modifying with an organosiliconate. The modified precipitated silica is washed following preparation, affording a modified precipitated silica with low levels of ionic substances.

Method for producing modified precipitated silica and a composition containing the same

Modified silica having a fraction of at least 15% T1 groups, or a greater fraction of T1 groups as compared to T3 groups, and an extractable content of less than 15 weight percent have a high proportion of surface modifying groups, and exhibit high thickening power in liquid media.

Surface-modified particulate metal oxides

Metal oxides surface modified with M and D groups where the D groups are in excess relative to the M groups exhibit high rheology properties in liquid compositions and provide products with elevated mechanical properties. The modified metal oxides contain a significant quantity of unreacted silanol groups, and can be more easily incorporated into polar organic substances, and also increase physical properties of cured polymers containing the modified metal oxides.

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Burghausen, Germany

Achim Schneider