Deposition from surfactant systems
View Patent ↗The invention presented in this application relates to a fragrance deposition system for high surfactant applications such as shampoo and body wash. The system will provide a long lasting release of the fragrance and is more efficient at low levels and does not deposit particles that can cause adverse properties.
1. A surfactant system comprising at least one surfactant and an emulsion of a modified starch and a hydrophobic active ingredient, wherein the emulsion is stable without the at least one surfactant, wherein said modified starch is modified with at least one quaternary ammonium cationic derivative and at least one hydrophobic derivative selected from the group consisting of octenyl succinic anhydride and dodecenyl succinic anhydride on the same polymer backbone, wherein the modified starch contains between 0.2 and 0.7 wt. % of cationic nitrogen and between 3 and 10 wt. % of said hydrophobic derivative, based on the dry weight of said modified starch, and wherein the hydrophobic active ingredient is an oil.
2. The composition of claim 1 , wherein said hydrophobic active ingredient is present at less than 3% by weight based on the total weight of said system.
3. The composition of claim 1 , wherein the hydrophobic active ingredient is emulsified into said modified starch.
4. The composition of claim 3 , wherein the emulsion before blending has an average particle size of about 0.05 microns to about 15 microns.
5. The composition of claim 1 , wherein the hydrophobic active ingredient is a fragrance oil.
6. The composition according to claim 1 , wherein said modified starch has a water fluidity (WF) value of from about 40 to about 70.
7. The composition of according to claim 1 , wherein said modified starch is derived from a base starch, and wherein the base starch is selected from the group consisting of starch from corn, tapioca, potato, wheat, rice, pea and mixtures thereof.
8. The composition according to claim 7 , wherein the base starch is a waxy starch.
9. The composition according to claim 1 , wherein the composition is a shampoo, soap or body wash.
10. The composition according to claim 1 , wherein the weight average molecular weight of said modified starch is from about 7 to about 90×10 6 Daltons.
11. The composition of claim 1 , wherein said cationic derivative is derived from reaction of said starch with a trimethyl ammonium derivative of an epoxide or chlorohydrin.
12. The composition of claim 11 , wherein the trimethyl ammonium derivative is selected from 3-chloro-2-hydroxypropyltrimethyl ammonium chloride and 2,3 epoxypropyltrimethyl ammonium chloride.
13. The composition of claim 1 , wherein the hydrophobic active ingredient is emulsified into the starch at 20-70% by weight relative to the dry basis of the modified starch.
14. The composition of claim 13 , wherein said hydrophobic active ingredient is a fragrance oil.
15. The composition of claim 1 wherein the hydrophobic active ingredient is encapsulated at 30-50% by weight relative to the dry basis of the modified starch.
16. The composition of claim 15 , wherein said hydrophobic active ingredient is a fragrance oil.