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US 9,359,464 B2Granted
Stable formaldehyde-free microcapsules
AssigneeFirmenich SA
InventorsDamien Berthier, Géraldine Leon, Nicolas Paret
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Abstract
The present invention relates to water-dispersible core-shell microcapsules essentially free of formaldehyde. In particular it concerns oligomeric compositions comprising, and the microcapsules obtained from, particular reaction product between a polyamine component and a particular mixture of glyoxal and a C4-6 2,2-dialkoxy-ethanal. The present invention comprises also the invention's core-shell microcapsules as part of a perfuming composition or of a perfuming consumer product.
Claims16
An oligomeric composition for the preparation of core-shell microcapsules, the composition obtained by reacting together:
- 1) a polyamine component in the form of melamine or of a mixture of melamine and at least one C1-4 compound comprising two NH2 functional groups;
- 2) an aldehyde component in the form of a mixture of glyoxal, a C4-6 2,2-dialkoxy-ethanal and optionally a glyoxalate, said mixture having a molar ratio glyoxal/C4-6 2,2-dialkoxy-ethanal comprised between about 1/1 and 10/1;
- and
- 3) a protic acid catalyst;
- wherein the composition provides a stable emulsion that facilitates formation of core-shell microcapsules.
2 more elements
Dependencies are inferred from the claim text.