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US 12,576,380 B2Granted
Environmentally friendly microcapsules and a method for the production thereof
AssigneeFollmann GmbH & Co. KG
InventorRaúl Amado Muñoz
Life of this patent
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Abstract
The present invention is directed to a method for producing advantageous microcapsules. Moreover, the present invention provides microcapsules obtained/obtainable by the method according to the invention.
Claims22
Method for producing microcapsules comprising a core material and a shell comprising the following steps,
- a) adding at least one crosslinking agent to a composition comprising at least one first solubilised polyelectrolyte (polyelectrolyte A),
- b) then adding the core material,
- c) optionally adding at least one further solubilised polyelectrolyte A,
- d) then optionally cooling the composition,
- e) adding at least one second solubilised polyelectrolyte (polyelectrolyte B) in a next step,
- f) then fostering a coacervation of the polyelectrolytes,
- wherein the polyelectrolyte A is an anionic polyelectrolyte and polyelectrolyte B is a cationic or amphoteric polyelectrolyte.
4 more elements
Microcapsule with a shell obtained or obtainable by crosslinking at least two polyelectrolytes with a reaction product from a dialdehyde and an aromatic alcohol.
Dependencies are inferred from the claim text.