Firmenich Sa

Otto Gräther

Lahoussine Ouali

Arnaud Struillou

Marlène Jacquemond

Eric Frerot

Estelle Rassat

Claudie Bellouard Drevet

Jean-Yves Billard De Saint-Laumer

The present invention relates to a process for producing perfume-containing microcapsules with a polyurea wall that can be used in home or personal care products, as well as to the microcapsules themselves and consumer products that include or incorporate these microcapsules. The process of the invention uses a particular colloidal stabilizer in the form of an aqueous solution that includes defined proportions of particular polymers.

Process for preparing polyurea microcapsules

Compounds of the formulain which the dotted lines indicate the position of single or double bonds, Rrepresents a radical belonging to a fragrant alcohol of the formula ROH, X represents a nucleophilic group selected from the group consisting of &#x2014;OH, &#x2550;O, &#x2014;NHor &#x2014;NHR, Rrepresenting a Cto Cstraight-chain or branched hydrocarbon radical, saturated or unsaturated, or an aliphatic or aromatic ring having 5 or 6 carbon atoms, m and n define whole numbers within the range 0 to 2 such that the sum m+n is equal to 1 or 2, p defines a whole number with a value of 0 or 1, each of the symbols R, R, R, R, R, taken independently, represents a hydrogen atom, a Cto Cstraight-chain or branched hydrocarbon radical, saturated or unsaturated, optionally substituted and, taken two by two, they can form aromatic or aliphatic monocyclic, bicyclic or tricyclic substances with the carbon atoms to which they are bound, are compounds capable of releasing a fragrant alcohol of the formula ROH upon hydrolysis of the ester bond.

Cyclic compounds and their use as precursors of fragrant alcohols

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Satigny, Switzerland

Otto Gräther