Water dispersible antifoam concentrates
AssigneeOSi Specialties, Inc.
InventorsKalman Koczo, Joan Kircher
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Abstract
Disclosed is a water dispersible antifoam concentrate comprising a polydiorganosiloxane component; fine solid particles of inorganic oxide, bearing on the surface thereof a polydiorganosiloxane component; a nonionic emulsifier component; a thickener component; and optionally, water, at up to 5 wt. % of the concentrate if present therein; optionally, but preferably, solvent, and preservative or biocide. The antifoam concentrate can be dispersed with a pre-set amount of water, using moderate shear, to obtain a complete, storage stable, low cost antifoam emulsion, which can be used in agricultural, food, textile, waste water, liquid detergent and general industrial applications.
Claims11
A water dispersible antifoam concentrate which comprises
- (a) polydiorganosiloxane;
- (b) fine solid particles of inorganic oxide, bearing on the surface thereof a polydiorganosiloxane component;
- wherein the total amount of polydiorganosiloxane present in components (a) and (b) comprises 10 wt. % to 80 wt. % of the concentrate and the weight ratio of the total amount of polydiorganosiloxane present in components (a) and (b) to the amount of said inorganic oxide is 10:1 to 200:1;
- (c) a nonionic emulsifier component which comprises 0.1 wt. % to 15 wt. % of said concentrate;
- (d) a thickener component which comprises 0.1 wt. % to 15 wt. % of said concentrate;
- (e) a polypropylene glycol solvent component of a molecular weight of about 500 to about 10,000 Daltons which comprises 5 wt. % to 50 wt. % of said concentrate, and
- optionally, water, at up to 5 wt. % of the concentrate if present therein, which concentrate can be dispersed in water to obtain a storage stable antifoam emulsion.
Dependencies are inferred from the claim text.