- Preparation of cationic nanoparticles and personal care compositions comprising said nanoparticles
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The present invention is directed to cationic nanoparticles, methods to make them, and the use of compositions containing said nanoparticles in personal care compositions or formulations. The nanoparticles are useful in personal care applications and impart antimicrobial properties to home and personal care products containing them. These cationic nanoparticles also contribute useful conditioning properties to hair-care and skin-care products.
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- Process for Hair Dyeing Comprising Application of Composite Pigment
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Disclosed is a process for dyeing of keratin-containing fibers comprising treating the fibers with at least one functionalized particle comprising on the surface an organic chromophore which is bound via a bridge member, wherein the particles are based on SiO2, Al2O3 or mixtures thereof, and the functionalized particles carry a positive charge.
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- Coloured Particles for Electrophoretic Displays
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The present invention discloses the use of functionalized particles as electrophoretic displaying particles, wherein the functionalized particles are SiO2, Al2O3 or mixed SiO2 and Al2O3 particles comprising, covalently bound to an oxygen atom on the surface, a radical of formula (1), wherein R1 and R2 are independently of each other hydrogen, particle surface-O—, or a substituent, n is 1, 2, 3, 4, 5, 6, 7 or 8, B is the direct bond or a bridge member, and D is the residue of an organic chromophore.
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