New UV absorber research trends

UVA band sunscreen products research

INCI NAME (Diethylamino Hydroxybenzoyl Hexyl Benzoate) referred as DHHB, it has molecular weight of about 391g/mol and it is oil-soluble chemical sunscreen.

It also has been concluded that DHHB's functionality in sunscreen products includes:

(1) Very high absorption effect on UVA1.

(2) Strong protective effect on free radicals generated by ultraviolet rays.

(3) Help to improve the SPF value of UVB sunscreen ingredients.

(4) Excellent stability and maintain performance for long time.

DHHB's UV-shielding range includes the entire UVA which is from 320 to 400 nm, with a maximum absorption peak at 354 nm. So the UVA1 masking effect is the same as the current best UVA1 sunscreen agent, Avobenzone, but DHHB is better than Avobenzone because of its stability to sunlight. Avobenzone is the most criticized. Under sunlight, the ability to absorb ultraviolet light is quickly weakened. Therefore, other UV absorbers are needed as a light stabilizer in the formulation to reduce the loss of avobenzone. For DHHB, this does not require any consideration.

UVA band sunscreen products research

DHHB has good light stability because its molecular structure has good resonance and hydrogen ion transfer (H-shift) effect. When DHHB molecules absorb ultraviolet light, they change through the benzene ring structure and adjacent hydrogen ions in the molecule.When the energy is absorbed, the entire molecular structure will temporarily change. When the molecule slowly releases the energy, the molecular structure of DHHB will return to its original state. In other words, during the absorption of ultraviolet light, DHHB structure It will not be destroyed, so it can maintain its long-term effectiveness.

DHHB not only provides good protection against UVA, but also improves the SPF value when used with UBV sunscreens, helping UVB protection. When used different concentrations of Uvinul A plus with UVB sunscreen (fixed 2% Ethylhexyl Triazone) and found that when DHHB was 2.5%, the SPF of the entire product was 10; when DHHB was increased to 10% At the time, the SPF value of the entire product can be increased to about 32.5. Formulated with UVB sunscreen (2% T-150 = EthylhexylTriazone), the UVA protection of DHHB can be increased with dose and has considerable effect on SPF values.

DHHB also has a strong protective effect on the free radicals generated by ultraviolet rays. A new concept ISPF of sun protection is roughly that, in addition to the UVB and UVA protection currently included in the sunscreen, the free radicals generated by ultraviolet light should be a protective focus, and ISPF refers to the protection against ultraviolet radicals.

Through nearly 10 years of data analysis and promotion, DHHB has completely replaced the unstable avobenzone in high-end brands, especially in Japanese and Korean cosmetics. Typical representatives are South Korea's Amore Pacific and Japan's Shiseido series of sunscreen products. The emergence of this product solves the UVA band protection problem that has long plagued the industry. With the deepening of its formulation, the product advantage will become more and more obvious. (At present, the demand for this product has reached nearly 500 tons without the US market, and the total amount is around RMB180 million.)

Sun protection band broadband research

1.Tinosorb A2B

Tinosorb A2B - terphenyl phenyl triazine, a highly effective UVB and UVA II UV absorber, water soluble, high light stability, enhances UVA I protection and is suitable for all product markets (eg sensitive skin and sunscreen for children)

2.Tinosorb S

Bis-dthylhexyloxyphend methoxyphenyl triazines, high-efficiency broad-spectrum UVB and UVA UV absorbers, light yellow powder, oil-soluble, excellent skin feel, high light stability, other light stability Stabilizer for poor UV absorbers. Not only for sunscreen products, but also for day care products such as skin lightening products. This sunscreen is being approved by the US FDA and approved by the European Union. This is an oil-soluble substance, a broad-spectrum UVA and UVB absorber. Research on this substance is not sufficient. It is only known to be light stable and has no estrogenic activity. (At present, the demand for this product has reached 800 tons without the US market, and the total amount is about RMB 500 million.)

3. Research on simplification trend of sunscreen compounding technology

Uvinul Easy is a sunscreen concentrate that turns into a sunscreen after adding water and thickeners. It can be used to make all sunscreens between SPF 6-50. Among them, the active ingredients of sunscreen are DHHB, OMC, T-150, Tinosorb M.

All people who care about sun protection become their own sunscreen formulators. Sunscreen products are directly based on personal and use occasions DIY, which is a trend in the future development of the industry.