Compact Sulfate-Free Shampoo Composition for Stable Pump Foaming
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Solution Overview
Problem
Formulating a stable, compact shampoo composition that is substantially free of sulfate-based surfactants is challenging due to issues with lather volume, cleansing, stability, and clarity, particularly when high surfactant levels lead to phase separation and product instability, especially in low viscosity formulas.
Innovation Solution
A shampoo composition comprising 5% to 40% of a surfactant system comprising 5% to 40% of a surfactant system comprising 5% to 40% of a surfactant system comprising 5% to 40% of a surfactant system comprising a viscosity of less than or equal to about 35 centipoise (cP), with a pH of 6 to 8, and a weight ratio of acyl glutamate to total surfactant from 0.30 to 1, and including anionic, zwitterionic, and non-ionic surfactants, without sulfate-based surfactants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If sulfate-free surfactants are used to achieve gentler cleaning, then skin and hair gentleness is improved, but lather volume and cleansing effectiveness deteriorate
Solution Approach 1:
The patent uses a composite surfactant system combining multiple sulfate-free surfactants (acyl glutamate, co-surfactant, decyl glycoside) to achieve both gentleness and adequate lather volume, replacing single-component sulfate-based surfactants
2Quantity of substance
If high surfactant levels are used to improve lather volume and cleansing, then cleaning effectiveness is improved, but product stability deteriorates due to phase separation
Solution Approach 1:
The patent optimizes the weight ratio of acyl glutamate to total surfactant (0.30 to 1) and controls pH (6 to 8) to prevent phase separation while maintaining adequate lather volume, resolving the stability-lather volume contradiction
3Ease of operation
If low viscosity is used to improve dispensing through pump foamer, then ease of operation is improved, but product stability deteriorates due to surfactant precipitation
Solution Approach 1:
The patent controls viscosity at ≤35 cP for pump compatibility while maintaining stability by optimizing surfactant composition ratios and pH, preventing precipitation despite low viscosity
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 phase stability and effective cleaning with a low viscosity, suitable for dispensing through a mechanical pump foamer, maintaining uniform product performance and avoiding orifice blockage.
Implementation Method 1
a surfactant system comprising: i) from about 5% to about 40%, by weight of the composition, acyl glutamate; ii) from about 5% to about 40%, by weight of the composition, co-surfactant
Data Source
AI summary
The present invention is directed to a compact, stable shampoo composition comprising from about 18% to about 40%, by weight of the composition, of a surfactant system wherein the surfactant system comprises: i) from about 5% to about 40%, by weight of the composition, acyl glutamate; ii) from about 5% to about 40%, by weight of the composition, co-surfactant wherein the co-surfactant is selected from the group consisting of anionic surfactant, zwitterionic surfactant, and combinations thereof; wherein the shampoo composition is substantially free of sulfate-based surfactants; wherein the weight ratio of acyl glutamate to total surfactant is from about 0.30 to about 1; from about 3% to about 10% of decyl glycoside; wherein the pH is from about 6 to about 8; wherein the composition has a viscosity of less than or equal to about 35 centipoise (cP).