Process for preparing oil-containing microcapsules
US3970585A · kind A · utility
3Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 24, 1973 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Apr 24, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2987
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a process for preparing oil-containing microcapsules comprising cooling a coacervate dispersion of a gelatin-containing colloid deposited around individual oil droplets to cause gelation of the colloid and subsequently hardening the gelled colloid by adding to the dispersion a hardening agent and adjusting the pH to the alkaline region, the improvement which comprises adding to the dispersion, after gelation but prior to hardening, an aqueous solution of an anionic high molecular weight electrolyte and an aqueous solution of an anionic surface active agent. Specific electrolytes and specific surface active agents are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.