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公开(公告)号：US20210030639A1
公开(公告)日：2021-02-04
申请号：US16968284
申请日：2019-03-06
Applicant: GIVAUDAN SA
Inventor： Sarah EL-HABNOUNI , Emmanuel AUSSANT , Vladica BOCOKIC , Sandra GUINEBRETIERE , Florent ROBERT
Abstract: Disclosed is a process for preparing an encapsulated fragrance composition. The composition comprises a plurality of microcapsules dispersed in a dispersion medium. The microcapsules comprise a core and a shell around the core. The process comprises the consecutive steps of: a) Providing an aqueous phase (I) comprising at least one anionically modified polyisocyanate (A); b) Providing an organic phase (II) comprising at least one fragrance ingredient; c) Mixing the aqueous phase (I) and the an organic phase (II) to obtain a mixture; d) Forming an emulsion comprising droplets of the organic phase (II) in the continuous aqueous phase (I); e) Adding at least one polyfunctional amine; f) Effecting formation of shells around the droplets formed in step d), to obtain a dispersion of microcapsules. The process comprises the additional step of adding a polyisocyanate (B), which is different from polyisocyanate (A).
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公开(公告)号：US20190233770A1
公开(公告)日：2019-08-01
申请号：US16329754
申请日：2017-09-19
Applicant: Givaudan SA
Inventor： Emmanuel AUSSANT , Ian Michael HARRISON , Sandra GUINEBRETIERE , Frederic BLONDEL , Guillaume JEANSON
Abstract: The invention relates to an encapsulated fragrance composition including at least one microcapsule dispersed in a dispersion medium, said at least one microcapsule including a fragrance oil core and a positively charged shell, which includes a reaction product of at least one at least difunctional anionically modified isocyanate with an amine or alcohol, preferably a polyamine, and wherein the shell is formed around droplet of core material that is stabilized with a positively charged colloidal stabilizer. Furthermore, the invention relates to a process of formation of said encapsulated fragrance compositions.
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