Unilever Home & Personal Care Usa, a Division of Conopco, Inc.

Unilever Home & Personal Care USA

Reinhard Kohlus

William Derek Emery

Seeng Djiang Liem

Terry Instone

Gilbert Martin Verschelling

Remy Antal Verburgh

Johannes Hendrikus Langeveld

A free-flowing granular detergent component comprises a high level (at least 30 wt %) of a heat-sensitive surfactant, preferably an alkyl ether sulphate; a water-insoluble silica or silicate carrier material of high oil absorption capacity; and a film-forming or crystal-forming structurant. The granular component may be used in conjunction with one or more other granular components containing surfactant and/or detergency builder, to form a particulate laundry detergent composition. The granular component is preferably prepared by mixing and granulation in a high- or moderate-shear mixer and drying in a fluidized bed.

Granular detergent components and particulate detergent compositions containing them

A particulate free-flowing laundry detergent composition comprises at least two different granular components: a granular component containing anionic surfactant, and a granular nonionic surfactant component comprising from 20 to 30 wt % of nonionic surfactant on a non-spray-dried particulate carrier material comprising sodium sesquicarbonate. The nonionic surfactant component is preferably prepared by in-situ neutralisation of sodium carbonate with a water-soluble organic acid in the presence of the nonionic surfactant, in a high- or moderate-shear mixer.

Particulate laundry detergent compositions containing nonionic surfactant granules

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Vlaardingen, Netherlands

Reinhard Kohlus