Stabilizer + Dispersant for W/O suncare formulas.

INCI name: Polyglyceryl-6 Polyricinoleate

NIKKOL Hexaglyn PR-15 is a plant-derived ester of ricinoleic acid and hexaglycerin, which is a sustainable raw material. Since it is a nonionic surfactant with many hydroxyl groups in its structure, NIKKOL Hexaglyn PR-15 has a high affinity with inorganic UV filters. It’s effective in improving the dispersibility of inorganic pigments in oil.
When the dispersibility for the hydrophobized titanium oxide (particle size 10 nm) and zinc oxide (particle size 25 nm) was evaluated, the significant dispersion effect was confirmed at the concentrations shown in the figure below for 50% of mineral UV filter dispersion.

The dispersion performance of NIKKOL Hexaglyn PR-15 to amino-acid treated pigments in mineral oil or cetyl ethylhexanoate were evaluated as ΔE(ab) which showed the color before and after dispersion of lightness, redness and yellowness. The condition was observed after 1 day.
Comparing the ΔE(ab) of the dispersions of 10% Disodium Stearoyl Glutamate-treated Iron Oxide and 88% oils, it was found that dispersibility improved in both mineral oil and cetyl ethylhexanoate when 2% NIKKOL Hexaglyn PR-15 was added.

Stabilizer & Dispersant for O/W suncare formulas.

INCI name: SODIUM METHYL STEAROYL TAURATE

NIKKOL SMT is an anionic surfactant which is highly safe for the skin. Dissolves in water and is resistant to both acids and alkalis. Since NIKKOL SMT is negatively charged in water phase, it easily adsorbs to inorganic powder and disperses well. Since it has stearic acid in its chemical structure, the viscosity and stability of O/W emulsion is increased even in the presence of salt.

NIKKOL SMT has an excellent stabilizing effect on O/W mineral sunscreen.
The O/W emulsion containing 35% titanium oxide and zinc oxide dispersion (powder amount is 17.5%), 25% oil and 3% NIKKOL Nikkomulese 41 was stored at a cycle and high temperature condition for 1 month, and the emulsified state was observed. The sample to which 0.5% NIKKOL SMT was added had a good emulsified state, whereas 5% thickening polymer (2% aq.) alone could not stabilize, and the inorganic UV filters were aggregated.