Maleic anhydride polymer-stabilized microcapsules
AssigneeFirmenich SA
InventorsVincent M. Rotello, Bradley P. Duncan, Valery Normand, Huda Jerri, Lahoussine Ouali, Daniel Benczedi
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Abstract
The present invention relates to microcapsules with a core-shell or matrix morphology stabilized by cross-linked nanoparticles. A process for the preparation of said microcapsules comprising selecting internal crosslinking of a Pickering emulsion is also an object of the invention. Perfumed consumer products, in particular fine fragrance, home and personal care products are also part of the invention.
Claims20
A particle-stabilized microcapsule obtainable by a process comprising the steps of:
- 1) suspending inorganic solid particles with at least one amine functionality in water, to form an aqueous phase;
- 2) suspending at least one maleic anhydride-containing polymer in a perfume or flavor oil to form an oil phase;
- 3) adding the oil phase to the water phase and mixing the resulting emulsion to form the microcapsule due to reaction between the inorganic solid particles and the maleic anhydride-containing polymer with the resulting cross-linked particles present at the oil/water interface of the emulsion surrounding the perfume or flavor oil.
A particle-stabilized microcapsule obtainable by a process comprising the steps of:
- 1) suspending inorganic solid particles with at least one amine functionality in water, to form an aqueous phase;
- 2) suspending at least one maleic anhydride-containing polymer in a perfume or flavor oil to form an oil phase, wherein the at least one maleic anhydride-containing polymer is present in an amount comprised between 0.5 and 50 wt % of the oil phase;
- and
- adding the oil phase to the water phase and mixing the resulting emulsion to form a microcapsule with cross-linked particles present at the oil/water interface.
A process for the preparation of a particle-stabilized microcapsule comprising the steps of:
- 1) suspending inorganic solid particles with at least one amine functionality in water, to form an aqueous phase;
- 2) suspending at least one maleic anhydride-containing polymer in a perfume oil to form an oil phase;
- 3) adding the oil phase to the water phase and mixing to form the microcapsule due to reaction between the inorganic solid particles and the maleic anhydride-containing polymer with the resulting cross-linked particles present at the oil/water interface of the emulsion surrounding the perfume or flavor oil.
A particle-stabilized microcapsule comprising
- a) a core of hydrophobic perfume or flavor;
- and
- b) a shell consisting of inorganic particles selectively cross-linked with a maleic anhydride-containing polymer.
Dependencies are inferred from the claim text.