Laundry additive particle having multiple surface coatings

Details Laundry additive particle having multiple surface coatings Laundry additive particle having multiple surface coatings

C - Chemistry, Metallurgy

11

D

C11D 17/06 (2006.01) C11D 3/12 (2006.01) C11D 3/22 (2006.01) C11D 3/50 (2006.01) C11D 17/00 (2006.01)

Patent

CA 2250324

A laundry additive particle having multiple coatings and compositions employing the particle are provided. The laundry additive particle comprises a porous carrier core material; a first encapsulating material coated on the core material to form an intermediate layer, the first encapsulating material comprising a glassy material derived from one or more at least partially water- soluble hydroxylic compounds having an anhydrous, nonplasticized, glass transition temperature, Tg, of at least about 0 ~C; and a second encapsulating material coated on the intermediate layer to form an outer layer, the second encapsulating material comprising a carbohydrate material having an anhydrous, nonplasticized, glass transition temperature, Tg, of at least about 130 ~C; and the laundry additive particle has a hygroscopicity value of less than about 80 %. Preferably, a laundry or cleaning agent such as a perfume is supported on or contained in the porous carrier.

Particule pour additif de lessive comportant de couches multiples et compositions contenantcette particule. La particule pour additif de lessive est composée d'un noyau formé d'un matériau de support poreux; un matériau d'encapsulage recouvre le matériau du noyau pour former une couche intermédiaire, ce premier matériau d'encapsulage étant un matériau vitreux dérivé d'un ou de plusieurs composés hydroxyliques au moins paritellement solubles à l'eau, dont la température T¿g? de transition en phase vitreuse anhydre non plastifiée se situe au moins autour de 0 ·C. Un second matériau d'encapsulage recouvre la couche intermédiaire pour former une couche externe, ce second matériau d'encapsulage étant un matériau glucide dont la température T¿g? de transition en phase vitreuse anhydre non plastifiée se situe au moins autour de 130 ·C. La particule d'additif pour lessive a un taux d'hygroscopicité inférieure à env. 80 %. Le support poreux supporte ou contient un agent de lessive ou de nettoyage, tel qu'un parfum.

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