COVER STORY: ELEMENTIS ADVERTISEMENT FEATURE with BENTONE LUXE XO without BENTONE LUXE XO
60 50 40 30 20 10 0
gel w/o gel in vitro
with
gel w/o gel in vivo
Inorganic, BENTONE® GEL TN V
Picture 4: Mineral W/O sunscreen showing enhanced water resistance with BENTONE® LUXE XO
sunscreens with either organic or mineral sun filters and BENTONE GEL® technology were tested in-vitro and in-vivo. The ideal dispersion of UV filters in the sunscreens and the improved structure and rheology of the system with BENTONE GEL® technology leads to a boost in SPF independent of the UV filter system. The same phenomenon can be seen with
sun care formulations containing BENTONE® LUXE technology in vitro and in vivo. Sun care products need to be long- lasting including a resistance to wash off. In a very simple approach, a formulation with BENTONE® LUXE XO is applied as thin film on a glass plate. The water droplets from the formulation with BENTONE® LUXE XO keep their shape when applied on the film, demonstrating enhanced indicative water resistance. Water droplets placed on the film of the control formulation without BENTONE® LUXE XO spread out and disrupted the film indicating poor hydrophobicity. In vitro studies were conducted to
determine the SPF before and after two water immersion steps for 20 min each. A hybrid sun care formulation based on BENTONE® LUXE technology not only indicated a boosted SPF before water immersion but after water
with
gel w/o gel in vitro
with
gel w/o gel in vivo
Organic, BENTONE® GEL HS V with
LUXE LUXE LUXE LUXE in vitro
in vivo Inorganic, BENTONE® LUXE XO with w/o with w/o
LUXE LUXE LUXE LUXE in vitro
in vivo Organic, BENTONE® LUXE XO with w/o with w/o
7
Figure 5: SPF boost with the addition of BENTONE GEL® technology with comparisons from in vitro and in vivo testing showing good reproducibility
160 140 120 100 80 60 40 20 0
Increase or stabilisation in SPF with BENTONE LUXE XO
Reduction in SPF with no Clay
Before Washing After Washing
Before Washing After Washing
Hybrid Sun Lotion-No Clay Hybrid Sun Lotion with BENTONE LUXE XO
Picture 6: BENTONE® LUXE XO gives improved SPF values and improved water resistance compared to the same hybrid W/O formulation without clay and only with emulsifiers
immersion due to the strong and intact film created by BENTONE® LUXE XO.
Benefits of BENTONE GEL®, BENTONE® LUXE and BENTONE HYDROCLAY™ Products of the BENTONE GEL® series form extremely stable W/O emulsions with the ability to create a variety of textures. Formulations apply easily without leaving a
with BENTONE LUXE XO
greasy film on the skin while enabling very uniform coverage of the skin. BENTONE GEL® products bring multiple benefits to the oil phase of a formulation while remaining up to 99% naturally derived according to the ISO 16128 standard. Emulsifying gels of the BENTONE® LUXE series can additionally create cold processable water-in-oil systems with very high oil content, ideal for reaching highest SPF performance. Both systems boost SPF and water resistance of sun care formulations. Products of the BENTONE HYDROCLAY™ series are up to 100% natural and address consumer’s needs of COSMOS approved and vegan ingredients. They create a strong network that boosts stability of O/W emulsions, making them a natural alternative in suspending mineral UV filters while providing heat resilient rheology.
PC
Elementis Services GmbH Stolberger Strasse 370 50933 Cologne, Germany Tel: +49 221 2923 2066 Fax: +49 221 2923 2011
without BENTONE LUXE XO
Figure 7: Surface metrology shows improved film thickness of a hybrid sunscreen formulated with BENTONE LUXE® XO
www.personalcaremagazine.com November 2023 PERSONAL CARE
In Vitro SPF on PMMA Plates
SPF
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