CRAIG WARREN JONES,HAILEY KELSO,JAMES MERRINGTON,MARTIN PETER CROPPER
申请号：
BR112019009066
公开号：
BR112019009066A2
申请日:
2017.10.17
申请国别(地区):
BR
年份:
2019
代理人:
摘要：
The present invention relates to a skin composition comprising: (i) at least 40% by weight of ethanol； (ii) from 0.1 to 6% by weight of perfume comprising nonpolar perfume materials； (iii) optionally at least 0.2% by weight of surfactant； (iv) 0.1 to 6% by weight of porous microparticles comprising sol-gel derived material； sol-gel derivative material including a plurality of alkylsilyloxy substituents and wherein the sol-gel derivative material is obtained from: (a) at least one first alkoxysilane precursor having the formula: (ch2) n-ar- (ch2) m-si- (or?) 3 (1) where neither is individually an integer from 1 to 8, ar is a unique, fused or polyaromatic ring, and each r? is independently a C1 to C5 alkyl group and； (b) optionally at least one second precursor having the formula: (r) y (r) y x (r 'o)? si? (r) "si" (or ") x) z (2) where x is 1, 2, 3 or 4； y is 0, 1, 2, 3； z is 0.1； the total of x + y + z is 4； each r is independently an organic functional group； each r? is independently an alkyl group c1 to c5 and r ?? It is an organic bridging group where the sol-gel derived material is swellable to at least 2.5 times its dry mass when placed in excess acetone, so at least part of the perfume remains outside the microparticles. likewise, a method of extending perfume release from a perfumed composition comprising the steps of: (i) adding sol-gel derived silica microparticles as described above to an ethanolic composition comprising ethanol and perfume comprising components non-polar perfumes, dispersed or dissolved in ethanol, and optionally surfactant； (ii) applying the composition to the skin to deposit the microparticles on the skin； (iii) evaporation of ethanol to leave some perfume and microparticles on the skin； absorbing at least part of the nonpolar perfume components from the liquid in the microparticles, preferably such that the microparticles increase in weight by 20 to 80% by weight and； (iv) release of perfume from the microparticles over a period of up
