Politecnico di Torino - Corso Duca degli Abruzzi, 24 - 10129 Torino, ITALY

+39 011 090 6100 info@tech-share.it

Broad-Spectrum Photoabsorber

Ecofriendly SunscreensencapsulationHybrid MaterialsPhotoprotective Additive DyesPhotostable UV Filters


New broad spectrum photo-absorbent material, formed by organic UV filters encapsulated in aluminosilicate particles (zeolites). The material absorbs UV radiation while remaining transparent. The encapsulation provides longer and greater stability, safety and efficacy of the filter, that are sheltered and isolated from the surrounding environment. The material is ideal for reducing the unwanted effects of sun exposure.

Technical features

The invention relates to a broad-spectrum photoabsorber, its preparation procedure, and its applications. The material is an organic-inorganic hybrid of microporous aluminosilicate microcrystals with organic UV filters. The molecules are permanently trapped in the structure. The material merges both advantages of chemical and physical filters. Indeed the encapsulation boosts the stability and efficacy of the UV filter. The encapsulation inhibits the filter photodegradation by sheltering and isolating the molecule from the surrounding matrix. The encapsulation also mitigates filter-skin interactions in cosmetic formulations and filter-ecosystem interactions. The environmental fate is secured by the microcrystal stability into an aqueous environment. The hybrid materials are highly versatile and tuneable. Moreover, their combination can provide a broad photoprotection spectrum, safe both for human health and the environment.

This technology reaches a TRL=4.

Possible Applications

  • Personal-care products: cosmetics, makeup and skin-care cosmetics;
  • UV-protection devices: packaging, food/beverage/goods containers and bottles, plastics, glassware, plastic/glass ophthalmic lenses, contact lenses, food and agricultural products;
  • Industrial Production: dyes, glazes, paints, coatings.


  • Enhanced filtering power;
  • Maintains the functionality of the UV filters in use;
  • Molecule-dermis interaction are precluded;
  • Amount of filter can be reduced;
  • Environmental impact of UV filters is mitigated;
  • Filter photodegradation is stopped;
  • Filter molecule release is hindered.