Laundry additive particle having multiple surface coatings
US6221826A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1999 |
| Grant date | Apr 24, 2001 |
| Priority date | — |
| Expiry date | Sep 20, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/3905
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
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.sub.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.sub.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 water soluble or dispersible compounds selected from the group consisting of waxes, water-soluble polymers, fatty comp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.