Process of encapsulation by interfacial polycondensation
US4309213A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 1978 |
| Grant date | Jan 5, 1982 |
| Priority date | — |
| Expiry date | Dec 26, 1998 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01N25/28
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The process for the encapsulation of a liquid hydrophobic substance involves, in a first stage, dispersing an organic phase containing the liquid hydrophobic substance to be encapsulated and at least one polyfunctional hydrophobic monomer having functional groups containing the carbonyl or sulphonyl group, in an aqueous phase containing a polyfunctional amine in which the amine functions have been rendered inactive by salification, and subsequently starting polycondensation by liberating the amine functions through the addition, to the aqueous phase, of an equivalent amount of a base which is stronger than the amine. The process has application to the preparation of compounds which can be used especially in the field of plant health.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.