Titre : |
Using spherical silica gels to improve sunscreen |
Type de document : |
texte imprimé |
Auteurs : |
Michael Sweeney, Auteur |
Année de publication : |
2022 |
Article en page(s) : |
p. 54-56 |
Note générale : |
Bibliogr. |
Langues : |
Anglais (eng) |
Catégories : |
Cosmétiques Dermo-cosmétologie Emulsions -- Emploi en cosmétologie Formulation (Génie chimique) Gel de silice Peau -- Soins et hygiène Produits antisolaires
|
Index. décimale : |
668.5 Parfums et cosmétiques |
Résumé : |
AGC Chemicals Americas explains how recent advances in silica gel technology mean W/O (water-in-oil) sun care formulations can now be created that rival the appeal and processing ease of O/W (oil-in-water) formulations.
Skincare product formulators often turn to water-in-oil (W/O) emulsions when working with inorganic sunscreen actives because of their superior sun protection factor (SPF) efficiency per unit of active. Oil-in-water (O/W) formulations have tactile aesthetic advantages but are less SPF-efficient and present formulation issues with inorganic sunscreen actives, especially zinc oxide.
W/O formulations provide better SPF efficiency in part because of the more consistent film they apply to the hydrophobic skin surface. There are other advantages as well, including the fact W/O emulsions have a degree of inherent water resistance not seen in O/W emulsions that contain hydrophilic emulsifiers. |
Note de contenu : |
- Challenges of W/O formulations using mineral actives
- Challenges of safe UV protection for daily wear applications
- SPF booster options
- Advantages of silica gels
- Nonporous aqueous gels provide additional SPF boost
- Processing advantages of silica gels
- Test formulations demonstrate results
- Fig. 1 : As UV light passes through the film of the sunscreen product on the skin, the porosity of the silica gels increases the pathlengthand causes it to scatter, promoting UV light reflection from the skin
- Fig. 2 : Silica gels are harder than plastic microbeads, so they retain their spherical shape and roll on easier, improving spreadibility on the skin
- Table 1 : Test formulations demonstrate in vitro SPF increase after adding porour and nonporous silica gels |
En ligne : |
https://drive.google.com/file/d/1SIWJP-W6poZZoRFET4PIHunPaNWXFbhZ/view?usp=drive [...] |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=38664 |
in GLOBAL PERSONAL CARE > Vol. 23, N° 9 (10/2022) . - p. 54-56