Non-soap liquid cleanser composition comprising caprylic acid

Caprylic acid in non-soap liquid cleansers enhances antibacterial efficacy against both gram-positive and gram-negative bacteria at mild pH, addressing the limitations of traditional agents by providing rapid and broad-spectrum protection.

CA3075701CActive Publication Date: 2026-09-22UNILEVER GLOBAL IP LTD
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Patent Information

Application Number
CA3075701
Authority / Receiving Office
CA · CA
Patent Type
Patents
Current Assignee / Owner
Priority Date
2017-10-27
Filing Date
2018-09-26
Publication Date
2026-09-22
Estimated Expiration
2038-09-26

AI Technical Summary

Technical Problem

Existing non-soap liquid cleansers face challenges in achieving enhanced antibacterial activity at mild pH ranges (4.5 to 5.5) without traditional antibacterial agents, particularly against both gram-positive and gram-negative bacteria, and in providing quick antibacterial effects within 20 seconds or less.

Method used

Incorporating caprylic acid (octanoic acid) into mild pH liquid syndet compositions, optionally combined with specific organic acids and non-ionic molecules, enhances antibacterial efficacy against both gram-positive and gram-negative bacteria, even in the absence of traditional antibacterial agents.

Benefits of technology

Caprylic acid significantly boosts antibacterial activity, achieving broad-spectrum protection against bacteria within 10 to 20 seconds, particularly at pH 4.5 to 5.5, with formulations showing up to 3-log reduction in bacterial counts.

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Abstract

This invention relates to syndet-based compositions having pH of 4.5 to 5.5 wherein use of caprylic acid has been unexpectedly found to enhance bacterial kill. Specifically, this invention relates to a liquid composition, the process for making it and its use, wherein the liquid composition comprises: 5 to 25% of an anionic surfactant; 0 to 5% of a non-ionic surfactant; optionally an amphoteric surfactant, wherein the anionic surfactant is 50% or more of surfactants; and 0.5 to 3% caprylic acid; wherein pH is 4.5 to 5.5; and wherein there is additionally present an organic acid having pKa of 4.5 to 5.0, a logP greater than 1.8 and water solubility greater than 0.5 g / 100 ml.
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