Patent ID: 8119164

Claim:
A method for the preparation of a powder containing perfuming or flavoring microcapsules having an St-1 dust hazard explosive classification, which comprises providing an explosion suppressant selected from the group consisting of C 1 -C 12 carboxylic acids, salts of C 1 -C 12 carboxylic acids and mixtures thereof in the powder by (a) adding the explosion suppressant to an aqueous emulsion of the perfuming or flavoring ingredient in a polymeric carrier comprising a starch, and spray-drying the obtained emulsion to form the powder; or (b) spray-drying an aqueous emulsion of a perfuming or flavoring ingredient in a polymeric carrier comprising a starch, and dry blending the spray-dried powder obtained with the explosion suppressant; or (c) impregnating the carrier material with the perfuming or flavoring ingredient and coating the impregnated carrier material with the explosion suppressant wherein the explosion suppressant is present in an amount of from 0.5 to 80% by weight relative to the total weight of the microcapsules and wherein the at least one perfuming ingredient is present in an amount of from 5 to 70% by weight relative to the total weight of the microcapsules.