Patent ID: 6991781

Claim:
A treatment composition, comprising: i) an aqueous continuous phase; ii) a reactive component comprising a reactive agent comprising a compound comprising a reactive group, the reactive group being a protected thiol reactive group having the formula R—(S—Pr) m where R is a mono or multivalent cosmetically active functional group, wherein R is a functional group selected from the group consisting of, skin conditioning agents, hair conditioning agents, hair repair agents, hair styling agents, hair dyes, scalp treatment agents, anti-inflammatory compounds, antioxidants, perfumes, oral care actives, skin moisturizers, pharmaceutical agents, antidandruff agents, moisturizers, humectants, pearlescent and/or opacifying materials, nail actives such as enamel and polish, eyelash actives and mascara, antiperspirant and deodorant actives, anti-acne actives, odor control actives, fluorescent actives, bleaching agents, enzymes, antibodies, dispersing aids, emollients, stabilizers, anti-static agents, anti-seborrhea agents, and mixtures thereof, S is sulfur, Pr is a protecting group, wherein the protecting group is selected from the group consisting of heterocyclic protecting groups, sp 2 aliphatic trigonal carbon protecting groups, sp 3 carbon electrophilic protecting groups, phosphorus protecting groups, metal based protecting groups, non-metal and metalloid based protecting groups other than phosphorus, energy-sensitive protecting groups and mixtures thereof, and m is an integer between 1 and 100; and b) a water immiscible solvent, wherein the water immiscible solvent solubilizes the reactive agent; and iii) a cationic surfactant comprising a quaternary ammonium halide wherein the cationic surfactants emulsify the reactive component in the aqueous phase to form bi-layer emulsion wherein the composition further comprises cholesterol wherein the ratio of cholesterol to cationic surfactant ranges from about 0.5:1.0 to about 1.5:1.0.