Unit Dose MEE Surfactant Detergent for Mildness
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Solution Overview
Problem
There is a need for a unit dose laundry detergent product that effectively cleans textiles while maintaining mildness and minimizing allergenic compounds, particularly in formulations packaged in unit dose film pouches.
Innovation Solution
A unit dose product comprising a pouch made from a water-soluble film material, with a detergent composition that includes about 5 to 20 wt % water, 35 to 65 wt % of a methyl ester ethoxylate (MEE) surfactant, and a non-aqueous solvent, ensuring a Zein score not exceeding 2% dissolved zein at a 3% dilution, and excluding linear alkylbenzene sulfonates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anionic linear alkylbenzene sulfonates (LAS) are used as surfactants, then cleaning efficacy is improved, but skin and eye irritation increases
Solution Approach 1:
The patent removes harmful anionic surfactants (LAS, SLES, AES) from the detergent composition entirely and replaces them with nonionic surfactants (MEE, AE, APG), thereby extracting the harmful component while maintaining cleaning function through alternative surfactant mechanisms
Solution Approach 2:
The patent changes the chemical nature of surfactants from anionic to nonionic, specifically using methyl ester ethoxylates with controlled HLB values and chain lengths to achieve effective cleaning while reducing irritation. The composition parameters are optimized to maintain performance without harsh chemicals
2Reliability
If propylene glycol is included as a solvent, then detergent performance is improved, but allergenic potential increases
Solution Approach 1:
The patent removes propylene glycol from the solvent system and replaces it with safer alternatives such as butylene glycol, pentylene glycol, or their cyclic ethers, thereby extracting the allergenic component while maintaining solvent functionality for detergent performance
Solution Approach 2:
The patent uses biodegradable glycols with shorter environmental persistence, replacing propylene glycol with compounds that break down more rapidly and have lower allergenic potential, effectively using shorter-lived, safer alternatives
3Reliability
If alcohol ethoxysulfonates are used as surfactants, then cleaning performance is improved, but traces of regulated compounds are present
Solution Approach 1:
The patent removes alcohol ethoxysulfonates from the surfactant system and replaces them with methyl ester ethoxylates and other nonionic surfactants that do not contain regulated compounds, thereby extracting the harmful traces while maintaining cleaning efficacy
Solution Approach 2:
The patent uses surfactants with similar functional properties to alcohol ethoxysulfonates but with different chemical structures that avoid regulated compounds, effectively copying the cleaning function without the harmful chemical identity
4Ease of operation
If unit dose film pouches are used for packaging, then convenience and skin protection are improved, but formulation challenges increase
Solution Approach 1:
The patent optimizes formulation parameters specifically for unit dose packaging, controlling water content, surfactant concentration, and solvent selection to ensure stability and performance in pouch format, thereby adapting the formulation to the packaging constraints
Solution Approach 2:
The patent creates a composite detergent system combining multiple nonionic surfactants (MEE, AE, APG) with specific solvents and additives that work synergistically to maintain performance in unit dose format while meeting mildness criteria
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The detergent composition provides effective cleaning performance while maintaining mildness and reducing allergenic potential, as evidenced by the low Zein score and absence of harsh surfactants like linear alkylbenzene sulfonates.
Implementation Method 1
a detergent composition comprising about 5 to 20 wt % water, about 35 to about 65 wt % of at least one surfactant comprising a methyl ester ethoxylate (MEE)
Implementation Method 2
a pouch formed from a water-soluble film material
Data Source
AI summary
The present disclosure provides a unit dose product comprising a pouch formed from a water-soluble film material; and a detergent composition disposed within the pouch that comprises about 5 to about 20 wt % water, about 35 to about 65 wt % of at least one surfactant comprising methyl ester ethoxylate and no linear alkylbenzene sulfonate, and a non-aqueous solvent. The detergent composition comprises a Zein score of not greater than 2% dissolved zein when tested on a 3% dilution. The composition can further comprise additional components, such as a base, a performance polymer, an anti-redeposition agent, an enzyme, a bleaching agent, a bleach activator, a chelating agent, an optical brightener, a bitterant, a corrosion inhibitor, or a combination thereof. The detergent composition comprises surfactants with improved mildness and solvents with reduced allergic components.