Controlled delivery system for hair care products
First Claim
1. A controlled delivery system for topical application to hair comprising:
- a solid particle comprising an active agent, a cationic charge booster and a cationic conditioning agent, said cationic charge booster is selected from the group consisting of polyvinyl amine, polyamine, polyalkyleneamine, polyalkyleneimine, a poly-quaternary ammonium compound and a quaternary ammonium compound having the formula, wherein X is an anion and R1, R2, R3, and R4 are each independently C1-C22 alkyl, C3-C22 alkenyl, or R5—
Q—
(CH2)m—
, wherein R5 is C1-C22 alkyl or alkenyl moiety having from 1 to 22 carbon atoms, and mixtures thereof, m is from 1 to about 6;
and when taken together with the Q unit is an acyl unit, Q can be derived from a source of triglyceride selected from the group consisting of tallow, partially hydrogenated tallow, lard, partially hydrogenated lard, vegetable oils, partially hydrogenated vegetable oils, such as canola oil, safflower oil, peanut oil, sunflower oil, corn oil, soybean oil, tall oil, rice bran oil, and the like and mixtures thereof.
1 Assignment
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Accused Products
Abstract
The present invention is a controlled delivery system that can be incorporated in hair care products such as shampoos, conditioners, hair styling products, and other hair care products to effectively deliver a broad range of active agents and sensory markers, such as fragrances or cooling agents onto the hair. The system also prolongs the release rate of the active agents or sensory markers over an extended period of time, or provides heat triggered release of the active agents and yields a high impact fragrance “burst” upon blow drying the hair or other types of heat treatment. The controlled delivery system of the present invention is a nano-particle, having an average particle diameter of from about 0.01 microns to about 10 microns. The nano-particle comprises hydrophobic polymers and co-polymers, cationic charge boosters in conjunction with cationic surface-active conditioning agents that assist in adhering the particles onto hair. The invention further relates to a controlled delivery system where the release rate of the active ingredients is synchronized with that of a sensory marker to convey to the consumer the product performance.
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Citations
31 Claims
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1. A controlled delivery system for topical application to hair comprising:
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a solid particle comprising an active agent, a cationic charge booster and a cationic conditioning agent, said cationic charge booster is selected from the group consisting of polyvinyl amine, polyamine, polyalkyleneamine, polyalkyleneimine, a poly-quaternary ammonium compound and a quaternary ammonium compound having the formula, wherein X is an anion and R1, R2, R3, and R4 are each independently C1-C22 alkyl, C3-C22 alkenyl, or R5—
Q—
(CH2)m—
, wherein R5 is C1-C22 alkyl or alkenyl moiety having from 1 to 22 carbon atoms, and mixtures thereof, m is from 1 to about 6;and when taken together with the Q unit is an acyl unit, Q can be derived from a source of triglyceride selected from the group consisting of tallow, partially hydrogenated tallow, lard, partially hydrogenated lard, vegetable oils, partially hydrogenated vegetable oils, such as canola oil, safflower oil, peanut oil, sunflower oil, corn oil, soybean oil, tall oil, rice bran oil, and the like and mixtures thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27, 28, 29, 30, 31)
shampoo, conditioners and hair styling products.
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29. The hair care product of claim 28 where the release of said active agent is activated by heat treatment of the hair.
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30. The hair care product of claim 29 further comprising a sensory marker.
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31. The hair care product of claim 30 wherein the release of said active agent is activated by heat treatment of the hair.
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25. A method of producing a controlled release system for topical application to hair comprising the steps of:
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heating a matrix material of a hydrophobic polymer to a temperature above the material melting point;
dissolving or dispersing an active agent into the melt;
dissolving or dispersing a cationic conditioning agent and cationic charge booster into the melt, said cationic charge booster is selected from the group consisting of polyvinyl amine, polyamine, polyalkyleneamine, polyalkyleneimine, a poly-quaternary ammonium compound and a quaternary ammonium compound;
wherein X is an anion and R1, R2, R3, and R4 are each independently C1-C22 alkyl, C3-C22 alkenyl, or R5—
Q—
(CH2)m—
, wherein R5 is C1-C22 alkyl or alkenyl moiety having from 1 to 22 carbon atoms, and mixtures thereof, m is from 1 to about 6;
and when taken together with the Q unit is an acyl unit, Q can be derived from a source of triglyceride selected from the group consisting of tallow, partially hydrogenated tallow, lard, partially hydrogenated lard, vegetable oils, partially hydrogenated vegetable oils, such as canola oil, safflower oil, peanut oil, sunflower oil, corn oil, soybean oil, tall oil, rice bran oil, and the like and mixtures thereof, heating the melt to a temperature above the melting point of the melt;
mixing the hot melt with the aqueous solution to form a suspension;
high shear homogenization of the suspension at a temperature above the melting temperature until a homogeneous fine suspension is obtained; and
cooling the suspension to ambient temperature to create a fine dispersion.- View Dependent Claims (26)
dissolving or dispersing a co-surfactant in the melt.
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Specification