MICROSPHERES AND PHOTOPROTECTIVE PERSONAL CARE COMPOSITION COMPRISING SAME

• Main Authors: PALANISAMY, BHARATH, GHOSH DASTIDAR, SUDIPTA
• Format: Patent
• Language: English; French; German
• Published: 24.02.2016
• Subjects: ADHESIVES; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; DYES; HUMAN NECESSITIES; HYGIENE; INORGANIC CHEMISTRY; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MEDICAL OR VETERINARY SCIENCE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NANOTECHNOLOGY; NATURAL RESINS; PAINTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POLISHES; PREPARATION OF CARBON BLACK; PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES; SPECIFIC USE OF COSMETICS OR SIMILAR TOILETPREPARATIONS; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF INORGANIC MATERIALS, OTHER THAN FIBROUS FILLERS,TO ENHANCE THEIR PIGMENTING OR FILLING PROPERTIES

The invention relates to photoprotective cosmetic compositions comprising microspheres and a process to prepare them. In particular, the invention is especially effective in protecting the skin against visible solar radiation while ensuring a highly acceptable even skin tone and appearance. The present inventors have developed a microsphere with hollow interior and shell of a material having a specific optical property and specific thickness and coated with another material having a different specific optical property, a combination of which gives the microsphere surprising benefits both in terms of protection from the harmful sun rays while giving a pleasing skin appearance when these microspheres are incorporated in topical compositions.