Process for the manufacture of a spray dried powder

摘要

The present invention relates to a process for the manufacture of a spray dried powder which comprises the the steps of (a) forming a warm, stirred aqueous slurry comprising: inorganic salts, at least one binding agent and from 0.001 to 20% by weight of capsules, based on the weight of spray dried powder, containing benefit agents including at least perfume, (b) spray drying the resultant slurry to form a spray dried powder, said capsules being such that:
1) more than 40% by weight of the benefit agents remain encapsulated 60 minutes after dispersion thereof at 70°C in the slurry as defined in the "slurry survival test" in a sealed vessel without agitation ;
2) more than 30% by weight of the benefit agents added for 15 minutes to an ambient slurry as defined in the "spray dry test" survive spray drying through a laboratory scale spray drier. Application: manufacture of detergents.