Kong Qiucha
2015
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Flavour Fragrance Cosmetics
Abstract
Through the antimicrobial efficacy study on 1,2-hexanediol and Zeastat separately,a new synergistic preservative-free combination of 1,2-hexanediol and Zeastat was presented. In water aqua,O / W emulsion,gel and cream,the inhibiting effect on bacteria and fungi of different mass ratio of mixtures were studied. The results showed that 1,2-hexanediol and Zeastat with mass fraction of 0. 80% and 0. 20%,or 0. 80% and 0. 30%,respectively,provided the excellent inhibiting effect on bacteria and fungi. In water aqua product,all tested bacteria and fungi were killed in 14 days,while in other products they were killed in 7 days. The experiment result confirmed that this new synergistic preservative-free combination not only had outstanding antimicrobial effect,but also cost saving,which is satisfied with the requirement of modern preservative free cosmetics.