Enzymatic method for the production of microcapsules
AssigneeBASF SE
InventorsRainer Dyllick-Brenzinger, Yvonne Dieckmann, Dietmar Haering, Bernhard Sturm, Michael Schroers, Harald Keller
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Abstract
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.
Claims11
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 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.
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.
Dependencies are inferred from the claim text.