Aqueous microcapsule dispersion
The invention relates to [1] an aqueous microcapsule dispersion containing a component (A): microcapsules each having a shell and a core containing at least one organic compound inside the shell, and a component (B): a surfactant containing a quaternary ammonium salt compound represented by the general formula (1), wherein the ratio by mass of the content of the component (A) to the content of the component (B) [component (A)/component (B)] is 0.1 or more and 20 or less, and [2] a dispersant for microcapsules, containing a surfactant that contains a quaternary ammonium salt compound represented by the general formula (1).
1. An aqueous microcapsule dispersion comprising the following component (A) and component (B), wherein:
the content of the component (A) is 5% by mass or more,
the ratio by mass of the content of the component (A) to the content of the component (B) [component (A)/component (B)] is 3 or more and 20 or less,
Component (A): microcapsules each having a shell that comprises silica as a constituent component and a core comprising at least one organic compound inside the shell,
Component (B): a surfactant comprising a quaternary ammonium salt compound represented by the following general formula (1):
wherein R 1 , R 2 and R 3 each independently represent an acyl group derived from a fatty acid having 12 or more and 30 or less carbon atoms, or a hydrogen atom, R 4 represents an alkyl group having 1 or more and 3 or less carbon atoms, and X-represents an anion, provided that at least one of R 1 , R 2 and R 3 is an acyl group derived from a fatty acid having 12 or more and 30 or less carbon atoms.
2. The aqueous microcapsule dispersion according to claim 1 , wherein the quaternary ammonium salt is liquid within a range of 10° C. or higher and 40° C. or lower.
3. The aqueous microcapsule dispersion according to claim 1 , wherein the total ratio of the acyl groups derived from oleic acid, linoleic acid and linolenic acid in all the acyl groups constituting the quaternary ammonium salt compound is 60% by mass or more and 100% by mass or less.
4. The aqueous microcapsule dispersion according to claim 1 , wherein the proportion of the acyl groups derived from oleic acid in all the acyl groups constituting the quaternary ammonium salt compound is 50% by mass or more.
5. The aqueous microcapsule dispersion according to claim 1 , wherein the content of the component (B) in the aqueous microcapsule dispersion is 10% by mass or less.
6. The aqueous microcapsule dispersion according to claim 1 , wherein the content of the component (A) in the aqueous microcapsule dispersion is 5% by mass or more and 50% by mass or less.
7. The aqueous microcapsule dispersion according to claim 1 , wherein the content of the quaternary ammonium salt compound in the aqueous microcapsule dispersion is 0.1% by mass or more and 10% by mass or less.
8. The aqueous microcapsule dispersion according to claim 1 , wherein the viscosity at 25° C. of the aqueous microcapsule dispersion is 1 mPa·s or more and 500 mPa·s or less.
9. The aqueous microcapsule dispersion according to claim 1 , wherein the median diameter D 50 of the microcapsules of the component (A) is 0.1 μm or more and 50 μm or less.
10. The aqueous microcapsule dispersion according to claim 1 , wherein the organic compound is at least one material selected from the group consisting of a fragrance material, a fragrance precursor, an oil, an antioxidant and a solvent.