Method of preparing a product composition comprising a discrete particle and an aqueous base composition
Disclosed is a method of preparing a product composition comprising steps of: Preparing a mixture composition comprising a surfactant and a high melting point fatty compound and benefit agent; Separately preparing an aqueous base composition comprising an aqueous carrier and water soluble polymer, wherein the base composition is substantially free of a detersive surfactant selected from anionic surfactants, zwitterionic surfactant, amphoteric surfactant, and combinations thereof; Mixing the mixture composition and the aqueous base composition to form a discrete particle of the mixture composition dispersed in the aqueous base composition. Alternatively, the method comprises steps of preparing a discrete particle of the mixture composition; and mixing it with the aqueous composition. The methods of the present invention provide a product composition with at least one the followings: more flexibility in the product composition rheology; improved stability in the product composition; improved deposition of benefit agents; and improved visual/aesthetic appearance.
1. A method of preparing a hair conditioning product composition comprising steps of:
Preparing a discrete particle mixture composition comprising a surfactant wherein the surfactant is selected from the group consisting of behenyl trimethyl ammonium methosulfate, behenyl trimethyl ammonium chloride, stearamidopropyl dimethylamine, and combinations thereof, and a high melting point fatty compound wherein the high melting point fatty compound is selected from the group consisting of cetyl alcohol, and stearyl alcohol and combinations thereof, and a benefit agent wherein the benefit agent is selected from the group consisting of silicone compounds, perfumes, coloring agents to add a different color to the discrete particle from the color of the aqueous base composition, incompatible agents which are incompatible to at least one ingredient contained in the aqueous base composition, and combinations thereof;
Separately preparing an aqueous base composition comprising an aqueous carrier and a water soluble polymer wherein the water soluble polymer is selected from the group consisting of maleic acrylate based copolymers, maleic methacrylate based copolymers, copolymers of methylvinyl ether and of maleic anhydride, copolymers of vinyl acetate and of crotonic acid, copolymers of vinylpyrrolidone and of vinyl acetate, and copolymers of vinylpyrrolidone and of caprolactam, polyquarternium-37, polyquarternium-6 and polyquarternium-7 and combinations thereof, and, wherein the base composition is substantially free of a detersive surfactant selected from anionic surfactants, zwitterionic surfactant, amphoteric surfactant, and combinations thereof;
Mixing the discrete particle mixture composition and the aqueous base composition, to form a discrete particle of the mixture composition dispersed in the aqueous base composition.
2. The method of claim 1 , wherein mixing the mixture composition and the aqueous base composition, both at a temperature lower than the melting point of the high melting point fatty compound contained in the mixture compound.
3. The method of claim 1 , wherein the mixture composition is prepared by steps of:
preparing a melting mixture composition comprising the surfactant and the high melting point fatty compound, wherein the temperature of the melting mixture composition is higher than a melting point of the high melting point fatty compound contained in the mixture composition;
cooling the melting mixture composition to the temperature which is lower than a melting point of the high melting point fatty compound contained in the mixture composition, to form the mixture composition;
wherein the benefit agent is added to the mixture composition before cooling, during cooling and/or right after cooling.
4. The method of claim 1 , wherein the water soluble polymer is selected from the group consisting of: a cationic water soluble polymer, a nonionic water soluble polymer, and mixtures thereof.
5. The method of claim 1 , wherein the water soluble polymer has an average molecular weight of from about 5,000 g/mol to about 50,000,000 g/mol.
6. The method of claim 1 , wherein the aqueous base composition has a viscosity of from about 100 centipoise to about 10,000,000 centipoise.
7. The method of claim 1 , wherein the discrete particles are not coated or encapsulated.
8. The method of claim 1 , wherein the discrete particle exists in the composition for 1 month or longer.
9. The method of claim 1 , wherein the discrete particle is swollen in the product composition.
10. The method of claim 1 , wherein the discrete particle is not an oil-in-water emulsion or water-in-oil-in-water emulsion.
11. The method of claim 1 , wherein the discrete particle before swelling is solid.
12. The method of claim 1 , wherein the discrete particle before swelling contains less than about 50% of water by weight of the discrete particle.
13. The method of claim 1 , wherein the discrete particle before swelling comprises from about 10% to about 100%, by weight of the discrete particle.
14. The method of claim 1 , wherein the surfactant contained in the discrete particle is hydrophobic.