Flow aids for detergent powders comprising sodium aluminosilicate and hydrophobic silica
AssigneeThe Procter & Gamble Company
InventorsPaul Amaat Raymond Gerard France, Paul Irma Albertus Van Dijk
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Abstract
Detergent components or compositions having a bulk density of at least 700 g/l comprise a nonionic surfactant system including at least one nonionic surfactant which is a liquid at temperatures below 40.degree. C., and from about 0.5% to 15% by weight of the component or compositions of a flow aid which is a premixed powder comprising sodium aluminosilicate and hydrophobic silica in a weight ratio of from 100:1 to 5:1. The detergent components or compositions are made by free dispersion mixing or granulation.
Claims14
A granular detergent component or composition having a bulk density of at least 700 g/l which comprises:
- i) a detergent powder which comprises a nonionic surfactant mixture comprising at least one nonionic surfactant selected from the group consisting of ethoxylated alcohols, and at least one nonionic surfactant selected from the group consisting of polyhydroxy fatty acid amides, and
- ii) from 0.5% to 15% by weight of a powdery flow aid characterised in that the flow aid comprises sodium aluminosilicate and hydrophobic silica wherein the weight ratio of the sodium aluminosilicate to hydrophobic silica is from 100:1 to 5:1.
A process for making a free-flowing detergent powder having a bulk density of at least 700 g/l which comprises the steps of:
- i) providing a nonionic surfactant system comprising at least one nonionic surfactant which is a liquid at temperatures below 40.degree. C.;
- ii) providing a granular detergent powder having a bulk density of at least 650 g/l;
- iii) spraying the nonionic surfactant system onto the granular detergent powder;
- iv) mixing the product of step iii) with a premixed powder comprising sodium aluminosilicate and hydrophobic silica in a weight ratio of from 100:1 to 5:1, wherein the flee-flowing detergent powder comprises from 3% to 15% by weight of the premixed powder.
A process for making a free-flowing detergent powder having a bulk density of at least 700 g/l which comprises the step of:
- fine dispersion mixing or granulating at least one nonionic surfactant which is a liquid at temperatures below 40.degree. C. in the presence of a premixed powder comprising sodium aluminosilicate and hydrophobic silica, wherein the ratio of the sodium aluminosilicate to silica is from 100:1 to 5:1 by weight, and further wherein the free-flowing detergent powder comprises 0.5 to 15% by weight of the premixed powder.
Dependencies are inferred from the claim text.