Enzymatic method for the production of microcapsules
The present invention provides a process for producing microcapsules. The microcapsules have an effect-substance-containing capsule core and a polymer-containing capsule covering. The capsule covering is formed by enzyme-catalyzed polymerization of monomers which are present in an inverse miniemulsion, as well as microcapsules and dispersions. The present invention also provides for using the microcapsules and microcapsule dispersions as components in colorants, cosmetics, pharmaceuticals, crop protection agents, fertilizers, and additives for foods or animal feed.
1. A process for producing microcapsules comprising a capsule core comprising an effect substance and a polymer-containing capsule covering, said method comprising forming a capsule covering by treating C 2 -C 18 lactones which are present in an inverse miniemulsion comprising a continuous non-polar phase and a discontinuous polar phase, with an enzyme effective to catalyze polymerization of the lactones, wherein:
said polar phase comprises a polar liquid and said non-polar phase comprises a non-polar liquid;
said polar liquid comprises less than 5 wt. % water;
said effect substance is present in solid, dissolved, emulsified or dispersed form in a discontinuous polar phase; and
said enzyme comprises a hydrolase.
2. A process for producing microcapsules comprising a capsule core comprising an effect substance and a polymer containing capsule covering, said process comprising forming a capsule covering by treating C2-C18 lactones which are present in an inverse miniemulsion comprising a continuous non-polar phase and a discontinuous polar phase, with an enzyme effective to catalyze polymerization of the lactones, wherein:
said polar phase comprises a polar liquid and said non-polar phase comprises a non-polar liquid;
said polar liquid comprises less than 5 wt. % water;
said effect substance is present in solid, dissolved, emulsified, or dispersed form in a discontinuous polar phase; and
said enzyme comprises a hydrolase;
wherein said enzyme comprises an oxidoreductase.
3. The process of claim 1 , wherein said effect substance is a colorant, cosmetic, pharmaceutical, crop protection agent, fertilizer, or an additive for foods or animal feed.
4. The process of claim 1 , wherein said effect substance is a crop protection agent or a fertilizer.
5. A microcapsule obtainable by means of the process of claim 1 .
6. A dispersion comprising said microcapsules of claim 5 .
7. An agrochemical formulation comprising microcapsules of claim 5 .
8. The process of claim 1 , further comprising a releaser is present in the capsule covering.
9. The process of claim 8 , wherein said releaser comprises at least one enzyme.
10. The process of claim 1 , further comprising a releaser is present in the capsule core.
11. The process of claim 10 , wherein said releaser comprises at least one enzyme.