Process for encapsulating particles with at least two coating layers having different melting points
US4657784A · kind A · utility
51Cited by
15References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1986 |
| Grant date | Apr 14, 1987 |
| Priority date | — |
| Expiry date | Mar 10, 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 solidify and form a continuous, nonporous encapsulating coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.