Production of microcapsules
US4898780A · kind A · utility
7Cited by
26References
10Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1988 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Jan 7, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2985
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Microcapsules having hard, thick walls are formed by dispersing an oily solution containing a crosslinking agent in an aqueous solution, and forming a polysalt in the aqueous solution, the polysalt including a high molecular weight polyanion and a low molecular weight polycationic polyamine having a functionality of at least three. The polyanion is preferably casein. The microcapsules may be used in a CB ink for preparing carbonless copy paper.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.