Patents

L’Oréal Patents Preservation Agent for Hair Care Composition

The formula is comprised of 4-(3-ethoxy-4-hydroxyphenyl)-2-butanone.

US Patent No. 12,048,758 B2 (Gaelle Farhi, Gaelle Moneuze, Damien Drillon, Julien Galvan); L’Oréal, Paris, has patented a  synergistic preserving agent for protecting a hair cosmetic composition against contamination from microorganisms.

The composition is comprised of:

• a first compound of formula shown below, present in a content ranging from 0.005% to 0.1% by weight relative to the total weight of the hair cosmetic composition containing the preserving agent;

US Patent No. 12,048,758 B2

• at least one diol comprising from 2 to 6 carbon atoms, present in a content ranging from 0.01% to 1% by weight relative to the total weight of the hair cosmetic composition containing the preserving agent, and wherein the weight ratio of the first compound to the • at least one diol ranges from 0.01 to 1l; and

at least salicylic acid, present in a content ranging from 0.01% to 0.05% by weight relative to the total weight of the hair cosmetic composition containing the preserving agent.

The first compound of formula and the salicylic acid show a synergistic antimicrobial effect.

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