Mixed oxide powder comprising alkali metal oxide, and silicone rubber comprising this powder
AssigneeEvonik Degussa GmbH
InventorsKai Schumacher, Helmut Roth, Rainer Golchert, Helmut Mangold, Mario Scholz
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Abstract
Alkali metal oxide-metal oxide mixed oxide powder in the form of aggregates of pore-free primary particles, comprising from 0.005 to 5% by weight of at least one alkali metal oxide, which has a BET surface area of from 100 to 350 m2/g, has a specific DBP number, expressed as DBP number per square meter of specific surface area, greater than or equal to that of a powder which has only the metal oxide component, has the alkali metal oxide distributed in the core and on the surface of the primary particles. Silicone rubber comprising the alkali metal oxide-metal oxide mixed oxide powder.
Claims11
A mixed oxide powder comprising:
- from 0.005 to 5% by weight of at least one alkali metal oxide and at least one metal oxide, wherein the powder
- is in the form of aggregates of pore-free primary particles,
- has a BET surface area of from 100 to 350 m2/g,
- has a specific DBP number, expressed as DBP number per square meter of specific surface area, greater than or equal to that of a powder which has only the metal oxide component, and
- has the alkali metal oxide distributed in the core and on the surface of the primary particles.
Dependencies are inferred from the claim text.