METHOD OF MAKING ELECTRET ARTICLES BASED ON ZETA POTENTIAL
申请人:Sebastian John M.
公开号:US20090293279A1
公开(公告)日:2009-12-03
A method of making an electret article, from a polymeric article that has a zeta potential of greater than or less than −7.5 millivolts. The article is charged by contacting it with an aqueous liquid that has a pH and conductivity as follows: (i) if the article has a zeta potential of −7.5 mV or less, then the contacting liquid has pH greater than 7 and a conductivity of 5 to 9,000 microSiemens per centimeter; and (ii) if the article has a zeta potential of greater than −7.5 mV, then the contacting liquid has a pH of 7 or less and a conductivity of 5 to 5,500 microSiemens per centimeter. An electret article made in this manner can provide improved electret performance, particularly in electret filtration articles.
COSMETIC OR DERMATOLOGICAL COMPOSITION COMPRISING A MEROCYANINE, AN ORGANIC UVB-SCREENING AGENT AND AN ADDITIONAL ORGANIC UVA-SCREENING AGENT
申请人:L'OREAL
公开号:US20150366769A1
公开(公告)日:2015-12-24
The present invention relates to a cosmetic or dermatological composition comprising, in a physiologically acceptable support: a) at least one oily phase and b) at least one merocyanine compound of formula (1) defined hereinbelow and c) at least one organic UVB-screening agent chosen from: v) a liquid lipophilic organic UVB-screening agent vi) a hydrophilic organic UVB-screening agent vii) a triazine UVB-screening agent and viii) mixtures thereof; and d) at least one organic UVA-screening agent other than the said merocyanine compound; when the said UVB-screening agent is liquid and lipophilic, the said composition contains less than 2% by weight of cyclohexasiloxane relative to the total weight of the composition. Another subject of the present invention consists of a non-therapeutic cosmetic process for caring for and/or making up a keratin material, comprising the application, to the surface of the said keratin material, of at least one composition according to the invention as defined above. The invention also relates to a non-therapeutic cosmetic process for limiting the darkening of the skin and/or improving the colour and/or uniformity of the complexion, comprising the application, to the surface of the keratin material, of at least one composition as defined previously. The invention also relates to a non-therapeutic cosmetic process for preventing and/or treating the signs of ageing of a keratin material, comprising the application, to the surface of the keratin material, of at least one composition as defined previously.
Photophysical Properties of Methyl Triazone Included in MCM-41¶
作者:Andrea Ricci、Michelle N. Chrétien、Abdelhamid Sayari、J. C. Scaiano
DOI:10.1562/2005-03-19-rn-466r.1
日期:——
Methyll triazone (4,4',4 ''-[1,3,5-triazine-2,4,6-triyltriimino]tris-trimethyl benzoate) has been included in mesoporous MCM-41 (Mobil's composition of matter-41) silica, and its fluorescence emission has been compared in solution and in the solid state. Although inclusion does not affect significantly the absorption properties, a fluorescence emission shift and a behavior similar to the solid state has been observed by increasing the loading. It is believed that this observation reflects molecular aggregation inside the MCM-41 channels. The potential of formulations of this type for sunscreen applications is discussed.