Process for producing microcapsules
US4010038A · kind A · utility
39Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 1, 1975 |
| Grant date | Mar 1, 1977 |
| Priority date | — |
| Expiry date | Apr 1, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/2989
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a process for producing microcapsules of complex hydrophilic colloid material enclosing fine particles of a hydrophobic substance, the improvement characterized in that: PA1 An acid-treated gelatin and at least one of carboxy-modified cellulose derivatives are used as the hydrophilic colloid materials, the amount of the cellulose derivative being 1/7 to 1/40 the amount of the gelatin by weight, the cellulose derivative having an average polymerization degree of 50 to 1,000 and a carboxyl substitution degree of 0.4 to 1.5, and PA1 The coacervation of the colloid material solution is effected at a pH of 4.8 to 6.0.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.