Liquid Detergent Composition with Stable Viscosity
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Solution Overview
Problem
High foaming liquid detergents experience significant viscosity changes with temperature, leading to unpredictable flow characteristics and dosage control issues when used in hand-washing applications.
Innovation Solution
A high foaming liquid detergent composition with a specific formulation of 5-17.5 wt.% anionic surfactants, 0-0.5 wt.% nonionic surfactants, 2-4 wt.% polyethylene glycol, and at least 50 wt.% water, which maintains stable viscosity between 10°C and 40°C, ensuring predictable flow and high foaming capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If high foaming liquid detergent is formulated, then foaming performance is improved, but viscosity stability across temperature range deteriorates
Solution Approach 1:
The patent changes the molecular weight parameter of polyethylene glycol from conventional high values (10,000-1,000,000) to a specific low range (4,000-6,000). This parameter change fundamentally alters the temperature-viscosity relationship, enabling the detergent to maintain stable viscosity across temperature ranges while achieving high foaming performance of at least 100ml
Solution Approach 2:
The patent creates a composite surfactant system combining non-alkoxylated anionic surfactants (linear alkylbenzene sulphonate, alpha-olefin sulphonate, methyl ester sulphonate, primary alcohol sulphate) with alkoxylated anionic surfactants in a specific weight ratio (95:5 to 60:40). This composite approach synergistically achieves both high foaming capability and temperature-stable viscosity
2Quantity of substance
If conventional high foam detergent is used, then foaming capability is improved, but dosage control precision deteriorates
Solution Approach 1:
By changing the molecular weight parameter of polyethylene glycol to 4,000-6,000, the patent achieves a unique viscosity profile that remains stable (5-100 cP) across the temperature range of 10-40°C. This stability enables precise dosage control in hand-washing applications while maintaining high foaming performance, as the detergent flow characteristics become predictable and controllable
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 composition achieves stable viscosity and high foaming performance across a temperature range, enhancing the reliability of hand-washing applications by maintaining consistent flow characteristics and lather production.
Implementation Method 1
A high foaming liquid detergent composition whose viscosity does not change substantially within the temperature range in which the composition is normally used (10°C to 40°C)... the liquid detergent composition has stable viscosity between a temperature range of 10 and 40 °C
Implementation Method 2
5 to 17.5 wt.% of one or more anionic surfactants... wherein the liquid detergent composition forms a foam volume of at least 100ml... enhancing the reliability of hand-washing applications by maintaining consistent flow characteristics and lather production
Data Source
AI summary
The present invention provides a liquid detergent composition comprising anionic surfactants, optionally one or more nonionic surfactants, polyethylene glycol, and water, and wherein the liquid detergent composition has a pH of 7.0 to 7.5, wherein the liquid detergent composition has a viscosity at 25°C and 20 s-1 in the range of 5 to 100 mPa s-1, and wherein the liquid laundry composition has stable viscosity between a temperature range of 10 and 40°C, and wherein the composition is adapted for application with a hand-held dispensing device used for washing by hand. The liquid detergent composition has a low constant viscosity throughout the temperature range of normal use and produces a stable foamy lather.