Rinse-off Composition Cooling Sensation Lactoyl Ethanolamine
Solution Overview
Problem
Rinse-off compositions, such as shampoos, face challenges in delivering a noticeable and long-lasting cooling sensation due to the limited contact time with the skin, as cooling compounds like menthol are less effective on skin compared to mucous membranes.
Innovation Solution
A rinse-off composition combining lactoyl ethanolamine with N-(4-cyanomethylphenyl) p-menthanecarboxamide and N-(2-pyridin-2-ylethyl) p-menthanecarboxamide, which are added to the standard composition base, providing an enhanced and prolonged cooling effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If cooling compounds like menthol are used in rinse-off compositions, then a cooling sensation is provided, but the cooling effect is not long-lasting due to limited contact time with the skin
Solution Approach 1:
The patent changes the chemical parameters by replacing traditional menthol with novel cooling compounds (N-(4-cyanomethylphenyl) p-menthanecarboxamide and N-(2-pyridin-2-ylethyl) p-menthanecarboxamide) that have enhanced skin penetration and prolonged action duration. This parameter change in chemical structure and properties directly addresses the short duration issue while maintaining the cooling effect.
Solution Approach 2:
The patent creates a composite cooling system by combining multiple cooling compounds with specific surfactants and conditioning agents in a formulated rinse-off composition. This composite approach synergistically enhances the cooling sensation duration beyond what single compounds could achieve alone, particularly through the interaction of cooling agents with skin and hair matrices.
2Reliability
If cooling compounds are applied to skin, then cooling sensation is achieved, but the effect is weaker compared to mucous membranes due to receptor distance
Solution Approach 1:
The patent modifies the chemical parameters of cooling compounds by selecting molecules with specific lipophilicity and molecular size characteristics that enhance skin penetration. The chosen compounds (N-(4-cyanomethylphenyl) p-menthanecarboxamide and N-(2-pyridin-2-ylethyl) p-menthanecarboxamide) have optimized physicochemical properties that allow them to reach skin receptors more effectively than traditional menthol, thereby improving reliability and detectability.
3Productivity
If rinse-off composition is applied quickly, then cleaning function is achieved, but cooling effect does not have time to manifest
Solution Approach 1:
The patent applies preliminary action by formulating cooling compounds that rapidly penetrate skin and initiate cooling sensation upon contact, before the rinse-off process completes. The compounds are designed to act immediately upon application, ensuring the cooling effect manifests during the brief contact period and continues afterward, thus resolving the timing conflict between quick cleaning and cooling manifestation.
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 combination results in a pleasant, long-lasting cooling sensation, up to 50% longer than traditional menthol-based shampoos, as demonstrated by improved ratings from user panels and graphical analysis of cooling effects over time.
Implementation Method 1
certain chemical compounds can provide a cooling sensation to the skin and mucous membranes of the body
Implementation Method 2
a particular combination of cooling compounds and other compounds gives a particularly effective cooling sensation
Data Source
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AI summary
A rinse-off composition, such as a shampoo, hair conditioner or shower gel, comprising a rinse-off composition base, lactoyl ethanolamine and at least one compound selected from the group consisting of N-(4-cyanomethylphenyl) p-menthanecarboxamide and N-(2-pyridin-2-ylethyl) p-menthanecarboxamide. The compositions provide a pleasant, long-lasting cooling sensation.