Patent · US Active

Method for producing microcapsules

US10835885B2 · kind B2 · utility

1Cited by

0References

13Claims

0Family size

Assignee

SYMRISE AG · DE

Inventors

Benjamin Rost · Bodenwerder, DE
Ralf Bertram · Holzminden, DE
Daniela Gregor · Holzminden, DE
Jan Peter Ebbecke · Bodenwerder, DE
Sabine Lange · Holzminden, DE

Key dates

Filing date	Apr 22, 2017
Grant date	Nov 17, 2020
Priority date	—
Expiry date	Jul 23, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D3/505
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

The invention relates to a method for producing microcapsules, comprising the following steps: (a) providing a first aqueous preparation containing at least one prepolymer; (b) providing a second non-aqueous preparation containing the active substance to be encapsulated; (c) mixing the aqueous and the non-aqueous phases in the presence of at least one emulsifier and/or stabilizer in order to form an emulsion; (d) polymerizing the at least one prepolymer contained in the emulsion from step (c) in order to obtain a dispersion of microcapsules that enclose the active substance; (e) hardening and cross-linking the microcapsules obtained in step (d); and optionally (f) removing the microcapsules from the dispersion and drying the microcapsules, the method being characterized in that the emulsion is formed in the presence of at least one 1,2-diol in step (c).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.