Rinse-Off Cleanser Patented by Unilever
U.S. Patent No. 7,446,081 B2: A U.S. patent has been awarded to Unilever Home & Personal Care USA for a rinse-off cleanser composition for delivering enhanced opacity (defined by ΔL value) while minimizing matting effect (lower shine). The composition consists of, by weight, 0.5-90% surfactant system comprising C10-C24 fatty acids, alkyl taurates, and oxyalkylene ethers; 0.1-35% solid particulate optical modifier with said modifier selected from the group consisting of talc, mica having particle size below about 50 micrometers and mixtures thereof; 0.01%-30% titanium dioxide particle having size of approximately 100-300nm; 2-25% of a deposition enhancement system that is comprised of 0.1-10% polyquaternium 6 cationic polymer or polymers having charge density of about 6.2 meq/g, 0.1 to 30% anionic surfactant and optionally 0.1-30% by wt. of a granular anionic polymer which is a natural alkaloid polymer that forms a precipitate with said cationic polymer or polymers upon dilution. The anionic forming the precipitate is selected from the group consisting of C10 to C24 fatty acid soaps, alkyl taurates, and mixtures thereof; and 0.1-45% of a hydrophilic structural dispersant comprising polyalkylene glycol, maltitol and glycerin. The combination of titanium dioxide with the specified particle size of and the optical modifier together with deposition enhancement system of provides at least 5% enhancement in ΔL while simultaneously enhancing shine effect.
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