Stable encapsulated fragrance compositions
Provided herein are solid salt base or sugar base compositions for delivering encapsulated fragrance to textiles, and processes of making and using the compositions for treating textiles. It has been discovered that, during the manufacturing process, premixing a silicon compound and a salt base or sugar base before incorporating an encapsulated fragrance slurry to the salt base or sugar base significantly decreases the encapsulate breakage rate of the solid compositions. Solid encapsulated fragrance compositions prepared by the process allows consumers to experience a long-lasting freshness of their clothes after treating their clothes with the encapsulated fragrance compositions.
1. A method for preparing an encapsulated fragrance composition comprising:
blending a salt base or a sugar base in an amount from about 88% to about 93% by weight of the composition and a first batch silicon compound in an amount from about 0.01% to about 10% by weight of the composition to form a first mixture;
optionally blending the first mixture with a free fragrance in an amount ranging from 0 to less than less than 10% by weight of the composition;
wherein the first batch silicon compound is selected from a group consisting of silicon dioxide, fumed silica, precipitated silica, aluminosilicate, sodium silicate, potassium silicate, calcium silicate, and a mixture thereof;
blending the first mixture, and optionally the free fragrance, and a fragrance encapsulate slurry to obtain a second mixture;
wherein the encapsulated fragrance slurry comprises a fragrance encapsulate and water, with the fragrance encapsulate suspended in the water;
wherein the fragrance encapsulate is present in the encapsulated fragrance slurry at a concentration of 30% to 40% by weight based on the total weight of the encapsulated fragrance slurry;
wherein the fragrance encapsulate comprises a microcapsule and a fragrance entrapped in the microcapsule; and
wherein the weight ratio of the first batch silicon compound and the fragrance encapsulate slurry is from 0.3 to 2.5.
2. The method of claim 1 , wherein the weight ratio of the first batch silicon compound and the fragrance encapsulate slurry is from 0.1 to 0.2.
3. The method of claim 1 , wherein the free fragrance in an amount ranging from about 1.0% to about 2.0% by weight of the composition.
4. The method of claim 1 , wherein the encapsulated fragrance slurry is in an amount from about 0.01% to about 20% by weight of the composition.
5. The method of claim 1 , wherein the encapsulated fragrance slurry is sprayed onto the first mixture.
6. The method of claim 1 , wherein the salt base or the sugar base is a salt base comprising sodium chloride.
7. The method of claim 1 , wherein the first batch silicon compound is silicon dioxide.
8. The method of claim 1 , wherein the first batch silicon is from about 0.2% to about 1% by weight of the composition.
9. The method of claim 1 , wherein the fragrance in the encapsulated fragrance slurry and the free fragrance are individually selected from a group consisting of an ester, an ether, an aldehyde, a ketone, an alcohol, a hydrocarbon, or a combination thereof.
10. The method of claim 1 , wherein the encapsulated fragrance slurry is from about 0.04% by weight to about 5% by weight, based on the total weight of the composition.
11. The method of claim 1 , wherein the microcapsule has a melamine/formaldehyde shell or a melamine acrylate/acrylamide shell.
12. The method of claim 1 , wherein the salt base or the sugar base further comprises an alcoholic solvent as a carrier for the free fragrance.
13. The method of claim 12 , wherein the alcoholic solvent is propylene glycol, dipropylene glycol, or a combination thereof.
14. The method of claim 1 , further comprising:
blending the second mixture and a second batch silicon compound,
wherein the second batch silicon compound is in an amount from about 0.01% to about 10% by weight of the composition.
15. An encapsulated fragrance composition comprising:
(a) a salt base or a sugar base in an amount from about 88% to about 93% by weight of the composition, wherein the salt base or the sugar base comprises an inorganic salt;
(b) a silicon compound in an amount from about 0.01% to about 10% by weight of the composition, wherein the silicon compound is selected from a group consisting of silicon dioxide, fumed silica, precipitated silica, aluminosilicate, sodium silicate, potassium silicate, calcium silicate, and a mixture thereof;
(c) a fragrance encapsulate slurry in an amount from about 0.01% to about 20% by weight of the composition, wherein the fragrance encapsulate comprises a microcapsule and a fragrance entrapped in the microcapsule;
wherein the weight ratio of the silicon compound and the fragrance encapsulate is from 0.3 to 2.5;
wherein the composition comprises water in an amount of less than 10% by weight of the composition.
16. The encapsulated fragrance composition of claim 15 , wherein the microcapsule has a melamine/formaldehyde shell or a melamine acrylate/acrylamide shell, and
wherein the fragrance in the fragrance encapsulate is an ester, an ether, an aldehyde, a ketone, an alcohol, a hydrocarbon, or a combination thereof.
17. The encapsulated fragrance composition of claim 15 , wherein the weight ratio of the silicon compound and the fragrance encapsulate slurry is from 0.1 to 0.2.
18. The encapsulated fragrance composition of claim 15 , further comprises a free fragrance in an amount ranging from about 0.01 to less than less than 2.3% by weight of the composition.
19. An encapsulated fragrance composition comprising:
(a) a salt base or a sugar base in an amount from about 50% to about 99.5% by weight of the composition, wherein the salt base or the sugar base comprises an inorganic salt;
(b) a silicon compound in an amount from about 0.01% to about 10% by weight of the composition, wherein the silicon compound is selected from a group consisting of silicon dioxide, fumed silica, precipitated silica, aluminosilicate, sodium silicate, potassium silicate, calcium silicate, and a mixture thereof;
(c) a fragrance encapsulate slurry in an amount from about 0.01% to about 20% by weight of the composition, wherein the fragrance encapsulate comprises a microcapsule and a fragrance entrapped in the microcapsule;
wherein the weight ratio of the silicon compound and the fragrance encapsulate is from 0.3 to 2.5;
wherein the composition comprises water in an amount of less than 10% by weight of the composition; and
wherein the salt base or the sugar base is a salt base comprising sodium chloride.
20. The encapsulated fragrance composition of claim 19 , wherein the silicon compound is silicon dioxide.