Spray-dried powdered detergent with perfume capsules.(Patent Review)

* U.S. Patent 7,538,079 B2; A process for manufacturing a spray dried detergent powder has been patented by Takasago, Tokyo. It entails forming a warm, stirred aqueous slurry comprised of inorganic salts, binding agents and 0.001-20% by weight of capsules based on the weight of spray dried powder, said capsules containing at least one benefit agent comprising perfume, and spray drying the slurry to form a detergent powder while admixing at least one member selected from a zeolite builder, phosphate builder, carbonate builder and a surfactant binding agent. More than 40% by weight of the benefit agent remains encapsulated 60 minutes after dispersion thereof at 70[degrees]C in the slurry in a sealed vessel without agitation; and more than 30% by weight of the benefit agent added for 15 minutes to an ambient slurry survives spray drying.

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