Degussa Aktiengesellschaft

Evonik Degussa Gmbh

Roland Bergmann

Manfred Diehl

Gunter Stadtmuller

Karl Meier

Christian Panz

Helga Obladen

Rene Allerdisse

Mario Loebbus

Anja Lukas

Wolfgang Leonhardt

Udo Kittelmann

Hans-Jurgen Strempel

Sigrid Diener

A hydrophobic precipitated silica having a BET of less than 110 m/g, a CTAB of less than 150 m/g, a BET/CTAB ratio of less than 3, a carbon content of greater than 3.1%, a pH of 9.7 to 10.5, a DBP of less than 230 g/(100 g), and a methanol wettability of more than 50%. The hydrophobic precipitated silica is used in compositions including defoamers, silicone rubber and HTV crosslinkable silicone rubber compositions. The hydrophobic precipitated silica is also useful as a flow assistant and carrier or anti-blocking agent.

Hydrophobic precipitated silica for defoamer formulations

Precipitated silicas with a high pH and their use in applications as defoamers having optimum silanol group density and a process for preparing precipitated silicas and to their use, particularly in defoamer formulations.

Hydrophilic precipitated silica for defoamer formulations

Aqueous suspensions of a silicate capable of binding calcium ions, containing, based on the total weight of the suspension,

Aqueous stable suspension of water-insoluble silicates capable of

A stable, pumpable, aqueous solution of a water-insoluble silicate capable of binding calcium ion is shown which, referred to the total weight of the aqueous suspension, contains

Stable aqueous suspensions of detergent zeolites and four oxo-alcohol

There is prepared an aqueous stable suspension of a water insoluble silicate capable of binding calcium ions and it is used for the production of washing and cleaning agents. The suspension contains in addition to water components A and B wherein component A is a silicate capable of binding calcium and having the formula

Aqueous stable suspensions of water insoluble silicates capable of

A granulated detergent builder is disclosed comprising:

Detergent builder

A scouring powder is provided which contains as the sole mechanical cleaning component crystalline zeolite powder of Type A having the following particle spectrum:

Scouring powder

There are provided aqueous pumpable stable suspensions of a water insoluble silicate capable of binding calcium ions which contain based on the total weight of the aqueous suspension (A) as the silicate capable of binding calcium 0.5 to 80 weight percent of a finely divided, bound water containing, synthetically produced, water insoluble compound of the general formula

Aqueous stable suspension of water insoluble silicate capable of binding

The invention is directed to a process for the production of zeolites of the type Na A4 having the surface modified with organosilanes. The organosilane must have at least one alkoxy group bonded to the silicon atom. The modified zeolites of the invention are used in washing and cleansing agents.

Process for the production of zeolites modified on the surface with

The solidification of hydraulic cement mixtures can be accelerated by addition of crystalline zeolites. Preferably, there are employed zeolites of Types A, X, and P.

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Grosskrotzenburg, Germany

Roland Bergmann