| 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. |