Microcapsules containing hydrophobic liquid core

D - Textiles – Paper – 06 – M

Patent

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Details

8/93.12

D06M 23/12 (2006.01) C08L 89/00 (2006.01) C11D 3/50 (2006.01) D06M 13/00 (2006.01)

Patent

CA 2009046

Microcapsules which are prepared using coacervation processes and/or which have a complex structure in which there is a large central core of encapsulated material, preferably perfume, and the walls contain small wall inclusion particles of either the core material or some other material that can be activated to disrupt the wall are disclosed. The microcapsules that are prepared by coacervation and contain perfume are especially desirable for inclusion in fabric softener compositions that have a pH of about 7 or less and which contain cationic fabric softener. The encapsulated perfume preferably does not contain large amounts of relatively water-soluble ingredients. Such ingredients are added separately to the fabric softener compositions. Ingredients that have high and low volatilities as compared to, e.g., the desired perfume, can either be added to, or removed from, the perfume to achieve the desired volatility.

Microcapsules préparées grâce à des procédés de coacervation et (ou) qui possèdent une structure complexe dans laquelle un grand noyau central renferme un produit encapsulé, de préférence du parfum, avec des parois renfermant de petites particules d'inclusion soit du même produit que le noyau, soit d'un autre produit qui peut être activé pour disloquer la paroi. Les microcapsules ainsi préparées et renfermant du parfum sont particulièrement intéressantes pour inclusion dans des compositions d'assouplissants pour tissus qui ont un pH d'environ 7 ou moins et qui renferment un assouplissant cationique. Il est préférable que le parfum encapsulé ne renferme pas de grandes quantités d'ingrédients relativement hydrosolubles. Ces derniers sont ajoutés séparément aux compositions d'assouplissants pour tissus. Les ingrédients qui possèdent des volatilités faibles ou fortes, comparativement p. ex. au parfum ciblé, peuvent être soit ajoutés à ce parfum, soit éliminés dans ce dernier pour obtenir la volatilité recherchée.

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