Methyl Ester Ethoxylate Blends for Liquid Detergent Foam Control
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Solution Overview
Problem
There is a need for improved liquid laundry detergent compositions with enhanced foaming characteristics.
Innovation Solution
A mixture of methyl ester ethoxylates comprising components (Z1) and (Z2) with specific molar ratios and ethoxylation properties, where (Z1) consists of linear monounsaturated alkenyl groups and (Z2) consists of linear saturated or polyunsaturated alkenyl groups with a molar ratio of at least 2.2:1.0, and an average ethoxylation degree of 5 to 25, preferably 9 to 11.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methyl ester ethoxylates are used in laundry detergent compositions, then surfactant function is provided, but foaming characteristics are insufficient
Solution Approach 1:
The invention changes the compositional parameters of methyl ester ethoxylates by specifying a particular mixture ratio of component (Z1) with 17-carbon monounsaturated alkenyl groups to component (Z2) with 17-carbon saturated or polyunsaturated alkenyl groups, where the molar ratio is at least 2.2:1.0. This parameter optimization resolves the contradiction by achieving superior foaming characteristics while maintaining effective surfactant performance.
Solution Approach 2:
The invention creates a composite surfactant system by combining two distinct methyl ester ethoxylate components (Z1 and Z2) with different fatty acid chain characteristics. The composite mixture leverages the synergistic effects of monounsaturated and saturated/polyunsaturated chains to achieve both excellent foaming properties and surfactant functionality, resolving the technical contradiction.
2Productivity
If the ethoxylation degree is increased to improve surfactant efficiency, then cleaning performance improves, but viscosity and handling difficulty increase
Solution Approach 1:
The invention optimizes the ethoxylation degree parameter to an average of 5 to 25 (preferably 9 to 11) units per molecule. This parameter selection achieves high surfactant efficiency for effective cleaning while controlling the viscosity and maintaining ease of handling, thus resolving the contradiction between productivity and ease of operation.
3Reliability
If excessive foaming occurs during handling and application, then surfactant activity is high, but control and usability are reduced
Solution Approach 1:
The invention fine-tunes the compositional parameters by controlling the ratio of component (Z1) to component (Z2) at least 2.2:1.0 and optimizing the ethoxylation degree to 5-25 units. This parameter optimization achieves the desired balance where sufficient surfactant activity is maintained while foam generation during handling and application is controlled to acceptable levels, resolving the contradiction between reliability and ease of operation.
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 mixture imparts advantageous foaming characteristics to laundry detergent compositions, reducing foaming during handling and application, and providing improved surfactant performance.
Implementation Method 1
Methyl ester ethoxylates (MEE) are already known in the prior art. Methyl ester ethoxylate surfactants as described in the prior art
Data Source
AI summary
Specific mixtures of methyl ester ethoxylates are described. The mixtures may be advantageously used as surfactants in laundry detergent compositions and preferably in liquid laundry detergent compositions.