Cationic Dextran Shampoo Formulation for Silicone Deposition
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Solution Overview
Problem
Existing shampoo formulations face challenges in efficiently depositing silicone onto hair while maintaining foam/lathery consumer feel and are costly, and there is a need for deposition aids with a higher natural origin index.
Innovation Solution
Incorporation of a cationic dextran polymer functionalized with quaternary ammonium groups into shampoo formulations, specifically with a weight average molecular weight of 50,000 to 3,000,000 Daltons, enhances silicone deposition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional deposition aids (e.g., polyquaternium-10, guar hydroxypropyltrimonium chloride) are used to deposit silicone onto hair, then deposition efficiency is achieved, but the amount of active ingredient required is high which detrimentally affects foam/lathery consumer feel and increases cost
Solution Approach 1:
The patent changes the chemical parameters of the deposition aid by using cationic dextran polymers with specific molecular weights (50,000 to 3,000,000 Daltons) and specific quaternary ammonium group structures. This parameter optimization enables enhanced silicone deposition efficiency at lower concentrations, resolving the contradiction between deposition effectiveness and the quantity of active ingredient required.
2Manufacturing precision
If high levels of silicone are incorporated into shampoo formulation to achieve desired deposition results, then deposition is facilitated, but foam/lathery consumer feel is detrimentally affected and cost increases
Solution Approach 1:
The patent optimizes the concentration parameters of both silicone and deposition aid in the shampoo formulation. By using highly efficient cationic dextran polymers, the formulation achieves effective silicone deposition at lower silicone levels, thereby preserving foam quality and consumer feel while reducing the burden on consumers to rinse thoroughly.
3Manufacturing precision
If conventional deposition aids are used in personal care cleansers, then deposition is achieved, but the natural origin index is low
Solution Approach 1:
The patent changes the chemical composition parameters by selecting dextran as the polymer base, which is a natural polysaccharide derived from bacterial fermentation of starch. This natural origin polymer is then functionalized with quaternary ammonium groups to provide cationic character for silicone deposition. This approach maintains deposition capability while significantly improving the natural origin index compared to conventional synthetic polymers.
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 cationic dextran polymer significantly improves silicone deposition on hair, maintaining formulation foam/lathery feel and reducing the amount needed, thus enhancing hair conditioning while being dermatologically acceptable.
Implementation Method 1
a deposition aid polymer, wherein the deposition aid polymer is a cationic dextran polymer, comprising a dextran polymer functionalized with quaternary ammonium groups
Data Source
AI summary
A shampoo formulation is provided, comprising: dermatologically acceptable vehicle; dermatologically acceptable silicone; sodium lauryl ether surfactant, wherein the sodium lauryl ether surfactant is selected from sodium lauryl ether sulfate having an average two -(OCH2CH2)- groups per molecule, sodium lauryl ether sulfate having an average three -(OCH2CH2)- groups per molecule and mixtures thereof; deposition aid polymer, wherein the deposition aid polymer is cationic dextran polymer, comprising dextran polymer functionalized with quaternary ammonium groups; wherein the dextran polymer has weight average molecular weight of 50,000 to 3,000,000 Daltons; wherein quaternary ammonium groups are selected from quaternary ammonium moieties of formula (A) bound to pendent oxygen on dextran polymer (A) wherein is pendent oxygen on dextran polymer; wherein X is divalent linking group bonding quaternary ammonium moiety to pendent oxygen on dextran polymer; wherein each R2 is independently selected from C1-4 alkyl group; and wherein R3 is linear or branched C8-16 alkyl group.