Emulsion comprising a mixture of silicone polymer and method of preparation thereof
Present invention is related to an oil-in-water emulsion comprising a silicone mixture, a mixture of emulsifier having HLB value from 10 to 16, and the particle size of the silicone mixture in the emulsion is less than 350 nm. A method of preparing the said emulsion comprising mixing a trialkylsilyl terminated dialkylpolysiloxane of viscosity of from 40,000 to less than 100,000 mPa·s at 25° C. and an amino silicone of viscosity of from 1,000 to 15,000 mPa·s at 25° C. and amine value of from 2 to 10 mg of KOH per gram of polymer, at a temperature of 25° C. to obtain a mixed silicone fluid and emulsifying the mixed silicone fluid by using plurality of the non-ionic emulsifier to obtain an oil-in-water emulsion, wherein D 50 particle size of less than 350 nm. The invention is to use the emulsion composition in the hair cosmetic composition.
1. An oil-in-water emulsion having D 50 particle size of less than 350 nm comprising:
a silicone mixture comprising:
a trialkylsilyl terminated dialkylpolysiloxane having a viscosity of from 40,000 to less than 100,000 mPa·s at 250 C. and an amino silicone having a viscosity of from 1,000 to 15,000 mPa·s at 25° C. and amine value of from 2 to 10 mg of KOH per gram of polymer;
a mixture of emulsifiers comprising one or more non-ionic emulsifier, wherein the mixture of emulsifiers has a HLB value from 10 to 16; and
water.
2. The oil-in-water emulsion of claim 1 , wherein the viscosity of the trialkylsilyl terminated dialkylpolysiloxaneis from 40,000 to 70,000 mPa·s at 250 C.
3. The oil-in-water emulsion of claim 1 , wherein the viscosity of the trialkylsilyl terminated dialkylpolysiloxane is from 51,000 to 70,000 mPa·s at 250 C.
4. The oil-in-water emulsion of claim 1 , wherein the trialkylsilyl terminated dialkylpolysiloxane is having less than 100 ppm by weight of hydroxyl terminated dialkylpolysiloxane or methoxy terminated dialkylpolysiloxane or mixtures thereof.
5. The oil-in-water emulsion of claim 1 , wherein the amino silicone is a trialkylsilyl terminated amino silicone.
6. The oil-in-water emulsion of claim 1 , wherein the amino silicone having less than 100 ppm by weight of hydroxyl terminated amino silicone or methoxy terminated amino silicone or mixtures thereof.
7. The oil-in-water emulsion of claim 1 , wherein the aminosilicone is of an amine value from 2 to 8 mg of KOH per gram of polymer.
8. The oil-in-water emulsion of any of claim 1 , wherein the aminosilicone is having amine value from 3.5 to 8 mg of KOH per gram of polymer.
9. The oil-in-water emulsion of any of claim 1 , wherein the mixture of emulsifier further comprises optionally one or more cationic emulsifier.
10. The oil-in-water emulsion of any of claim 1 , wherein the mixture of non-ionic emulsifiers is a mixture of alkyl ether of polyalkylene glycol and alkyl esters of polyalkylene glycol.
11. The oil-in-water emulsion of any of claim 1 , wherein the oil-in-water emulsion further comprises a biocide.
12. A method of preparing an oil-in-water emulsion comprising:
mixing a trialkylsilyl terminated dialkylpolysiloxane having a viscosity of from 40,000 to less than 100,000 mPa·s at 25° C. and an amino silicone having a viscosity of from 1,000 to 15,000 mPa·s at 25° C. and amine value of from 2 to 10 mg of KOH per gram of polymer, at a temperature of from 15° C. to 40° C., preferably at 25° C., to obtain a mixed silicone fluid;
adding a mixture of emulsifiers comprising one or more non-ionic emulsifier, wherein the mixture of emulsifiers has a HLB value from 10 to 16, to the mixed silicone fluid to obtain a silicone-emulsifier-mixture;
homogenizing the silicone-emulsifier-mixture; and
adding step-wise water, preferably demineralized water, to obtain an oil-in-water emulsion having D50 particle size of less than 350 nm.
13. The method of preparing the emulsion of claim 12 , further comprises adding a biocide.
14. The method of preparing the emulsion of claim 12 , wherein the mixture of emulsifier is prepared by mixing one or more non-ionic emulsifier.