Defoamer granules and processes for producing the same
AssigneeCognis Deutschland GmbH & Co. KG
InventorsKarl Heinz Schmid, Michael Neuss, Detlef Stanislowski, Karin Koren, Andrea Borntraeger
Life of this patent
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Abstract
Defoamer granules containing support materials and silicones for solid laundry detergent, dishwashing detergent and cleaning compositions, obtainable by applying silicones in the form of aqueous emulsions to an added intermediate product of support materials and simultaneously drying and granulating the products in a fluidized bed, with the proviso that at least 85% by weight of the particles have a mean diameter below 1.5 mm, are described.
Claims24
A process for producing defoamer granules, said process comprising:
- (a) providing a support material;
- (b) applying an aqueous emulsion comprising a silicone to the support material to form a silicone/support material product;
- and
- (c) simultaneously drying and granulating the-product in a fluidized bed granulator to provide a defoamer granule composition, such that the composition contains at least 85% by weight of particles having a mean diameter less than 1.5 mm.
A process for producing defoamer granules, said process comprising:
- (a) providing a support material comprising (i) at least one compound selected from the group consisting of alkali metal carbonates, alkali metal sulfates, alkali metal phosphates, zeolites, alkali metal silicates, cellulose ethers, polycarboxylates and starches, and (ii) a wax-like defoamer selected from the group consisting of bisamides, fatty acids, fatty alcohols, carboxylic acid esters, paraffin waxes and mixtures thereof, wherein the wax-like defoamer is present in an amount of from about 2% to about 80% by weight, based on the total weight of the support material;
- (b) continuously spraying an aqueous emulsion comprising a polydisiloxane and a thickener onto the support material to form a silicone/support material product, wherein the thickener comprises sodium carboxymethyl cellulose and a nonionic cellulose ether in a ratio by weight of from about 80:20 to about 40:60, the thickener being present in an amount of from about 0.5 to about 10% by weight, based on the total weight of the aqueous emulsion;
- and
- (c) simultaneously drying and granulating the product in a fluidized bed granulator to provide a defoamer granule composition, such that the composition contains at least 85% by weight of particles having a mean diameter less than 1.5 mm.
Dependencies are inferred from the claim text.