Hair Styling Composition Residue Reduction via Sulfonated Polymer
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Solution Overview
Problem
Hair styling compositions that combine fixing polymers with thickening or gelling agents often result in the formation of unsightly residues on hair due to partial degradation of welds, while also failing to provide a satisfactory texture for easy application and absorption.
Innovation Solution
A cosmetic composition combining an anionic fixing polymer, such as a terpolymer of vinylpyrrolidone, acrylic acid, and lauryl methacrylate, with a sulfonated polymer derived from ethylenically unsaturated monomers containing a sulfonic group, which minimizes residue formation and provides a suitable texture for hair styling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fixing polymers are combined with thickening polymers or gelling agents in hair gels, then the hairstyle fixation and hold are improved, but unsightly residues form on the hair due to partial degradation of welds
Solution Approach 1:
The patent changes the chemical parameters of the polymer composition by specifying a particular terpolymer composition (vinyl pyrrolidone, acrylic acid, and lauryl methacrylate in specific ratios) and controlling the molecular weight and charge density parameters to minimize residue formation while maintaining fixation reliability
Solution Approach 2:
The invention uses a composite polymer system combining three different monomers (vinyl pyrrolidone, acrylic acid, and lauryl methacrylate) in a specific terpolymer structure, creating a material that simultaneously provides strong fixation and resistance to residue formation through the synergistic effects of its components
2Reliability
If fixing polymers are combined with thickening polymers or gelling agents, then the hairstyle fixation is improved, but the texture becomes unsatisfactory with sticky or dragging sensation during application
Solution Approach 1:
The patent optimizes the physical parameters of the gel texture by controlling the molecular weight, charge density, and monomer ratio of the terpolymer, achieving a balance between fixation strength and application ease with a slippery, non-sticky texture
Solution Approach 2:
The invention creates different local properties within the polymer structure - the hydrophilic acrylic acid segments provide texture and slip, while the hydrophobic lauryl methacrylate segments provide fixation strength, allowing the material to exhibit different qualities at different molecular levels
Data Source
AI summary
Cosmetic composition (A) for treating keratin fibers, especially human hair, comprises, in a cosmetic medium, at least one anionic, fixing polymer (P1) containing, as monomers, at least one vinyl lactam (VL), an ethylenically unsaturated carboxylic acid (II) and an alkyl (of at least 6C) acrylate or methacrylate (III); and at least one partially or entirely neutralized sulfonated polymer (P2) that includes at least one motif derived from an ethylenically unsaturated monomer (M) carrying a sulfonic acid group. An independent claim is included for an aerosol device comprising a container filled with (A) and a distribution system.