Personal Cleansing Composition for Piroctone Deposition Stability
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Solution Overview
Problem
Existing hair treatment compositions face challenges in achieving effective deposition of piroctone compounds, such as piroctone olamine, on the scalp and hair during washing, leading to low antidandruff activity and potential adverse effects on formulation stability and sensory properties.
Innovation Solution
A personal cleansing composition comprising an amphoteric surfactant and an anionic surfactant with a specific ethoxylation degree, a liquid hydrocarbon triglyceride oil, an aliphatic fatty acid, and piroctone compound, formulated at a pH of 6 or less, to enhance deposition while maintaining formulation stability and sensory benefits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the level of piroctone olamine is increased to improve antidandruff activity, then deposition effectiveness is improved, but formulation stability and sensory properties deteriorate
Solution Approach 1:
The patent introduces an intermediary substance - a cationic polymer - that mediates between the piroctone olamine and the scalp/hair surface. This polymer acts as a carrier that facilitates the deposition of piroctone olamine while maintaining formulation stability and sensory properties, resolving the contradiction between effectiveness and stability
Solution Approach 2:
The patent changes the physical-chemical parameters of the formulation by adjusting pH to acidic conditions (pH 3-6) and incorporating specific cationic polymers. These parameter changes enable effective deposition of piroctone olamine at lower concentrations, maintaining stability while improving antidandruff activity
2Reliability
If the level of piroctone olamine is increased to improve deposition, then antidandruff activity is improved, but adverse effects on hair sensory occur
Solution Approach 1:
The cationic polymer serves as an intermediary carrier that delivers piroctone olamine to the scalp and hair surface through electrostatic interactions. This intermediary mechanism enables effective deposition at lower concentrations, avoiding adverse sensory effects while maintaining antidandruff activity
Solution Approach 2:
By adjusting the pH to acidic conditions (pH 3-6) and incorporating cationic polymers, the formulation achieves improved deposition efficiency at lower piroctone olamine concentrations, thereby avoiding adverse effects on hair sensory properties
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 improves the deposition of piroctone olamine on the scalp and hair, enhancing antidandruff activity without adverse effects on formulation rheology or sensory properties.
Implementation Method 1
a cleansing surfactant comprising an amphoteric surfactant and an anionic surfactant
Implementation Method 2
an oil phase comprising at least one liquid hydrocarbon triglyceride oil
Data Source
AI summary
A personal cleansing composition comprising: i) a cleansing surfactant comprising an amphoteric surfactant and an anionic surfactant which if ethoxylated has a degree of ethoxylation of less than 3, in which the ratio of anionic surfactant to amphoteric surfactant is less than 5:1; ii) an oil phase comprising at least one triglycerideoil; iii) an aliphatic fatty acid or salt thereof having a carbon chain length from C4 to C10; and iv) a piroctone compound; in which the composition has a pH at 20°C of l6 or less and the weight ratio of aliphatic fatty acid to triglyceride oil is from 1:2 to 5:1.