Microcapsules

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 17/00 (2006.01) B01J 13/02 (2006.01) C11D 3/22 (2006.01)

Patent

CA 2575107

Microcapsule for use in a liquid detergent composition, the microcapsule having a core and a polymeric polyanion-polycation complex shell wherein the polyanion component is capable of gelling in the presence of calcium and has a storage modulus when gelled with 0.05 moles/litre of calcium of less than about 150 Pa at an angular frequency of about 0.5 rad/s and a polyanion concentration of about 3.8 % by weight at 25 ~C. The invention also relates to a process for making the microcapsules, liquid detergents comprising the microcapsules and cleaning methods using the liquid detergents.

L'invention concerne une microcapsule utilisée dans une composition détergente liquide. La microcapsule est formée d'un noyau et d'une enveloppe complexe polyanion-polycation polymérique, le composant polyanion pouvant se gélifier en présence de calcium et comprenant un module de conservation, lorsqu'il est gélifié à l'aide de 0,05 moles/litre de calcium, inférieur à environ 150 Pa à une fréquence angulaire d'environ 0,5 rad/s et une concentration de polyanions d'environ 3,8 % en poids à 25 °C. L'invention concerne également un procédé de fabrication des microcapsules, des détergents liquides contenant lesdites microcapsules, et des méthodes de nettoyage consistant à utiliser lesdits détergents liquides.

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