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US 11,077,417 B2Granted
Microcapsule comprising a polyester-urethane shell and a hydrophobic core material
AssigneeBASF SE
InventorsYannick Fuchs, Helmut Witteler, Matthias Bratz
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Abstract
Disclosed herein are microcapsules as core-shell-particles, including a polymeric shell, a method of making them, a dispersion of those microcapsules in a liquid medium and use thereof. The microcapsules include a core that contains a hydrophobic component.
Claims20
A microcapsule comprising a capsule core and a polymeric shell, wherein the core comprises only hydrophobic components and the shell comprises in polymerized form:
- A) at least one poly(ester-urethane) comprising at least 2 isocyanate groups, obtainable by reacting at least one polyester-polyol comprising at least 2 OH groups with at least one polyisocyanate comprising at least 2 NCO groups, and;
- B1) at least one polymeric polyamine selected from the group consisting of polyaminosaccharides, polyamidoamines, polyesteramines, polyaminoacids and combinations thereof, having an average molecular weight of between about 375 g/mol and about 2500 g/mol, and comprising at least 3 amino groups reactive towards NCO groups.
Dependencies are inferred from the claim text.