Zemea biobased propanediol (INCI: Propanediol), manufactured by DuPont Tate & Lyle Bio Products, is a natural, preservative-boosting humectant and solvent. It can be used to replace or augment petroleum based glycols such as propylene glycol (PG), butylene glycol (BG) or glycerin in cosmetic and personal care formulations.
It is multifunctional and may be used as a humectant, emollient, preservative-booster, viscosity enhancer and/or natural solvent in a wide variety of skin, hair care and other personal care products. The unique solvency properties of Zemea enable effective delivery of certain actives to the skin. It is also used as a component in various other personal care ingredients such as preservative systems, antimicrobials, esters and botanical extracts.
Previously reported in Personal Care (May 2011), CTFA challenge testing results showed that biobased propanediol can boost the efficacy of preservatives in a personal care formulation. In this study, we evaluated the combined effect of Zemea propanediol and ZPT on mortality of M. globosa, a microorganism associated with human dandruff. Zinc pyrithione (ZPT) is an antimicrobial compound that has been used since the 1960s in antidandruff shampoos. Treatment with ZPT reduces the amount of fungus on the scalp and stops dandruff flaking.3 The concentration of Zemea propanediol that was tested in this study was approximately 50% under the Minimum Fungicidal Concentration, which permitted insight into interactions of Zemea propanediol and ZPT. The results indicate that Zemea propanediol significantly enhances the effect of ZPT3 and that efficacy of hair care formulations intended for the control of dandruff can be improved by incorporation of Zemea propanediol.
Dandruff
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