POWDERED ANTIFROTHING AGENT FOR AQUEOUS SYSTEM NOT CONTAINING SILICON SUBSTANTIALLY AND ITS MANUFACTURE

Japanese Patent JPS57180408

A

A free-flowing, substantially silicone-free, powdery antifoaming composition for use in aqueous systems comprised of: (a) a liquid homogeneous mixture of a branched-chain primary C16-C30 alcohol and hydrophobic-reacting colloidal silicic acid with a ratio by weight of alcohol:silicic acid of 100:2 to 100:20, as obtained by heating to 100 DEG to 240 DEG C. with agitation for a time sufficient to obtain a homogeneous mixture, (b) a water-insoluble wax in a ratio by weight of (a):(b) of from 3:1 to 1:3, and (c) a water-soluble powdered carrier where the components (a) and (b) are present on the carrier in homogeneous distribution, the powdered carrier being present in such an amount that a free-flowing product results. The primary alcohol of component (a) is preferably a Guerbet alcohol of the formula: R = C4-C16alkyl. A natural or synthetic paraffin wax or mixture of waxes with a congealing point in the range of 40 DEG to 120 DEG C. is used preferably as the wax (b). The carrier (c) is a salt that is compatible with the aqueous system, especially an alkali metal salt from the group of the phosphates, the polymeric phosphates, the borates, carbonates, silicates, sulfates or their mixtures, preferably sodium tripolyphosphate. The product is prepared by mixing the liquid alcohol/silicic acid mixture (a) with the wax (b) and the carrier (c) at temperatures above the congealing point of the wax, cooling of the homogeneous mixture to room temperature with continued mixing and crushing into a free-flowing powder. The antifoaming agent is preferably used in washing and cleaning products in amounts from 0.15% to 15% by weight.

HANSUUURURITSUHI HENPERU
EDOMUNTO SHIYUMAADERU

JP6184882A

November 06, 1982

April 15, 1982

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HENKEL KGAA

B01D19/04; C11D3/00; (IPC1-7): B01D19/04

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