Encapsulated bleach particles with at least two coating layers having different melting points
US4731195A · kind A · utility
47Cited by
10References
10Claims
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Assignee
Inventor
Key dates
| Filing date | Oct 31, 1986 |
| Grant date | Mar 15, 1988 |
| Priority date | — |
| Expiry date | Oct 31, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2998
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
High efficiency encapsulation of core particles, particularly halogen bleaches, by (i) encapsulating the core particle in at least two separate coats wherein the melting point of the inner or first coating material is below the melting point of the outer or second coating material, (ii) heating the thus encapsulated particle to a temperature between the melting points of the inner and outer coating materials in order to liquefy the inner coat, and (iii) allowing the liquid inner coat to solidfy and form a continuous, nonporous encapsulating coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.