| 摘要 |
A laundry additive particle having multiple coatings and compositions employing the particle are provided. The laundry additive particle comprises a central core particle with the core particle comprising a porous carrier core material and a glassy encapsulating material intermixed with the carrier material. The glassy encapsulating material is derived from one or more at least partially water-soluble hydroxylic compounds having an anhydrous, nonplasticized, glass transition temperature, T g, of at least about 0 .degree.C. An optional intermediate encapsulating material may be coated on the central core particle. The intermediate encapsulating material may comprise a carbohydrate material having an anhydrous, nonplasticized, glass transition temperature, T g, of at least about 130 .degree.C. Lastly, an external coating material is coated on the core particle or the intermediate encapsulating material which provides the laundry additive particle with a substantially non-tacky surface. The external coating material is derived from one or more at least partially wash soluble or dispersible compounds selected from the group consisting of waxes, water-soluble polymers, fatty compounds, carbohydrates, cellulose and cellulose derivatives, natural and synthetic gums, silicates, borates, phosphates, chitinand chitosan, and mixtures thereof. 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.
|
