Cationic Surfactant Cosmetic Composition for Sensitized Hair
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Solution Overview
Problem
Current cosmetic compositions for treating sensitized hair, particularly those containing cationic surfactants, often face issues such as rinseability problems, stability issues, difficulty in distribution, and insufficient cosmetic properties, leading to undesirable effects like stiffening and residue feel, with insufficient care for damaged hair ends.
Innovation Solution
A cosmetic composition combining a cationic surfactant, a weakly oxyethylenated sorbitan ester of a saturated fatty acid, and a non-silicone liquid fatty substance in a specific ratio, which improves hair smoothness, disentanglement, and reduces discomfort reactions, providing uniform softness from roots to ends without residue feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cationic surfactants are used to treat sensitized hair, then softness and smoothness are improved, but rinseability problems and stability problems occur
Solution Approach 1:
The patent changes the molecular structure parameters of the surfactant by using cationic surfactants with specific chain lengths (C12-C22) and combining them with nonionic surfactants having controlled HLB values (3-15), which modifies the overall properties to improve both softness and rinseability simultaneously
Solution Approach 2:
The patent creates a composite surfactant system by combining cationic surfactants (for softness and smoothness) with nonionic surfactants (for rinseability and stability), where each component contributes different properties that complement each other, resolving the contradiction between softness improvement and rinseability maintenance
2Ease of operation
If cationic polymers or cations are used to facilitate disentanglement and give softness, then hair softness is improved, but high affinity for hair leads to substantial deposition during repeated use causing unpleasant feel and stiffening
Solution Approach 1:
The patent modifies the charge density and molecular weight parameters of the cationic components by selecting specific cationic surfactants rather than high-molecular-weight cationic polymers, which reduces excessive deposition while maintaining sufficient softness and disentanglement benefits
Solution Approach 2:
The patent applies different surfactant components to different aspects of hair care: cationic surfactants provide localized softness and smoothness where needed, while nonionic surfactants provide rinseability and prevent excessive deposition, creating a balanced local effect that avoids overall stiffening
3Ease of operation
If current conditioning cosmetic compositions are used on very sensitized hair, then some cosmetic properties are improved, but the ends which are usually very damaged receive insufficient care
Solution Approach 1:
The patent applies different surfactant components with different properties to address different needs: cationic surfactants target the damaged ends for intensive conditioning and repair, while nonionic surfactants provide overall rinseability and stability, creating localized intensive care where it is most needed
Solution Approach 2:
The patent creates a multi-functional surfactant system where the combination of cationic and nonionic surfactants provides multiple benefits simultaneously: conditioning, smoothness, rinseability, and targeted care for damaged ends, making the composition universally effective for sensitized hair throughout
Data Source
AI summary
The present disclosure relates to a cosmetic composition comprising, in a cosmetically acceptable aqueous medium, at least one cationic surfactant, at least one oxyethylenated ester of sorbitan and at least one non-silicone liquid fatty substance, the liquid fatty substance being present in an amount of less than 8% by weight relative to the total weight of the composition. Another aspect of the present disclosure relates to a cosmetic process for treating keratin materials, such as the hair.The compositions as disclosed herein have an improved conditioning effect, for instance by smoothing the tips of the hair and providing improved hair sheen.