Preservative Composition for Stable, Low-Irritation Microbial Control

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Solution Overview

Problem

Existing preservative systems in cosmetics and personal care products often cause microbial contamination, phase separations, odors, discoloration, and pose health risks due to natural-derived ingredients with irritating effects, despite consumer concerns and improper storage practices.

Innovation Solution

A preservative system comprising xylitol ester and/or ether, caprylyl glycol, ethylhexylglycerin, and 1,3-propanediol, optionally with additional ingredients like anisic acid and chlorphenesin, is formulated to inhibit microbial growth effectively while being hypoallergenic and non-naturally occurring.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If natural-derived preservative ingredients are used, then microbial protection is achieved, but irritating effects and hypersensitizing effects occur

Engineering Contradiction:

Improvemicrobial protectionVSAvoidirritating effects and hypersensitizing effects

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the chemical parameters of preservative ingredients by using synthetic alternatives (synthetic parabens, synthetic vitamin E, synthetic fragrances) that mimic the functionality of natural ingredients but without the harmful biological effects. This parameter change allows achieving microbial protection while eliminating irritation and hypersensitivity issues associated with natural-derived ingredients.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs composite preservative systems combining multiple synthetic ingredients (e.g., combining synthetic parabens with synthetic vitamin E, or using combinations of synthetic fragrances with preservatives) to achieve synergistic microbial protection while maintaining hypoallergenic properties. The composite approach allows distributing the protective function across multiple ingredients, reducing the burden on any single component.

Inventive Principle:

Principle #40Composite materials

2Reliability

If conventional preservative systems are used, then microbial contamination is prevented, but phase separations, odors, and discoloration occur

Engineering Contradiction:

Improveprotection from microbial contaminationVSAvoidphase separations, odors, and discoloration

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent changes the chemical stability parameters by using synthetic preservatives that are more chemically stable and less prone to degradation. Synthetic ingredients maintain their structural integrity better under various storage conditions, preventing phase separations, odor development, and discoloration that commonly occur with natural-derived preservatives.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent ensures continuous and consistent preservative action through synthetically stabilized formulations that maintain their protective function throughout the product shelf life. The synthetic ingredients provide uninterrupted microbial protection without the intermittent failure that occurs when natural ingredients degrade or separate, ensuring continuous product stability.

Inventive Principle:

Principle #20Continuity of useful action

Data Source

PatentUS12576153B2Preservative systems

Publication Date: 2026.03.17 ALUMIER LABS INC

AI summary

Described herein are preservative systems that can include xylitol esters and/or ethers, caprylyl glycol, ethylhexylglycerin, and 1,3-propanediol. Also disclosed are formulations such as cosmetics, pharmaceuticals, and personal care products that include a preservative system as described herein.