Shaving Composition Surfactant System for Lubrication and Skin Protection
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Solution Overview
Problem
Shaving foams containing fatty acid-based soaps cause skin dryness, irritation, and razor blade dulling, while soap-free formulations struggle with consistent texture and rigidity.
Innovation Solution
A shaving composition comprising amphoteric and anionic surfactants, humectants, moisturizing agents, and other additives, with a pH range of 3.5 to 8 and less than 1% fatty acid, providing lubrication and consistent foam without the need for self-lubricating razor mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fatty acid-based soaps are used in shaving foams, then lubrication is provided, but skin dryness and irritation occur
Solution Approach 1:
The patent removes fatty acid-based soaps from the shaving foam formulation to eliminate the harmful effects of skin dryness and irritation, while maintaining lubrication through alternative amphoteric and anionic surfactant combinations
Solution Approach 2:
The patent changes the chemical composition parameters by substituting traditional soap-based surfactants with specific amphoteric surfactants (0.1-60% w/w) and anionic surfactants (0.1-30% w/w), adjusting the formulation to achieve adequate lubrication without the harmful effects of fatty acids
2Ease of operation
If fatty acid-based soaps are used in shaving foams, then lubrication is provided, but razor blade dulling occurs
Solution Approach 1:
The patent extracts and eliminates fatty acid-based soaps from the formulation to prevent razor blade dulling, while maintaining necessary lubrication through alternative surfactant systems that do not contribute to blade degradation
3Object-affected harmful factors
If soap-free formulations are used, then skin irritation is reduced, but foam consistency and rigidity deteriorate
Solution Approach 1:
The patent creates a composite surfactant system combining multiple amphoteric surfactants (0.1-60% w/w) and anionic surfactants (0.1-30% w/w) in specific ratios, achieving a synergistic effect that provides both skin gentleness and adequate foam consistency without relying on fatty acid-based soaps
Solution Approach 2:
The patent adjusts the concentration parameters of amphoteric and anionic surfactants within specific ranges to optimize the balance between reducing skin irritation and maintaining foam rigidity, achieving satisfactory performance in both aspects
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 satisfactory rigidity and consistency in foams, reduces skin dryness and irritation, and slows razor blade dulling, offering improved user experience and cost-effectiveness.
Implementation Method 1
the shaving compositions include mixtures of amphoteric and anionic surfactants
Implementation Method 2
Shaving foams are generally in the form of an oil-in-water emulsion
Implementation Method 3
about 0.1% w/w to about 20% w/w of a humectant
Implementation Method 4
provide the desired lubrication for shaving
Data Source
AI summary
The invention relates to shaving compositions that are non-fatty acid-soap based, but still provide the desired lubrication for shaving. In embodiments, the shaving compositions include mixtures of amphoteric and anionic surfactants, along with other components such as, e.g., humectant, moisturizing agent, chelating agent, preservative, natural extract, opacifier, foaming agent, fragrance, and water.