Anionic Fixing Polymer with Alkyl Acrylate for Hair Styling
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Solution Overview
Problem
Conventional hair styling compositions, particularly hair gels, often form unsightly residues on hair due to the fragility of the fixing film and are difficult to distribute in aerosol devices, lacking sufficient fixation and ease of application.
Innovation Solution
A cosmetic composition combining an anionic fixing polymer with vinyl lactam, ethylenically substituted carboxylic acid, and alkyl acrylate or methacrylate, along with a cationic surfactant, which provides high viscosity without the need for thickening polymers or gelling agents, minimizing residue formation and enhancing sprayability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional hair gels are used to achieve fixation, then hair shaping is improved, but unsightly residues form on the hair due to film fragility
Solution Approach 1:
The patent changes the chemical composition parameters of the fixing polymer by incorporating specific monomers (vinyl lactam, ethylenically substituted carboxylic acid, and alkyl acrylate or methacrylate with at least 6 carbon atoms) in defined proportions to create a polymer that forms a more durable film resistant to residue formation while maintaining fixation properties
Solution Approach 2:
The patent creates a composite system combining the specially formulated anionic fixing polymer with cationic surfactants (quaternary ammonium salts or fatty amine salts) to achieve synergistic effects that improve film durability and reduce residue formation while maintaining effective hair fixation
2Stability of the object's composition
If thickening polymers or gelling agents are added to achieve gel texture, then composition consistency is improved, but device complexity increases and sprayability deteriorates
Solution Approach 1:
The patent extracts and eliminates the need for separate thickening polymers or gelling agents by incorporating thickening functionality directly into the fixing polymer formulation through the specific monomer composition and cationic surfactant interaction, thereby simplifying the overall formulation while maintaining gel texture
Solution Approach 2:
The fixing polymer composition is designed to perform multiple functions simultaneously: fixation, gel texture provision, and sprayability enhancement, eliminating the need for separate functional additives and reducing formulation complexity
3Reliability
If conventional fixing polymers are used to achieve film formation, then fixation is improved, but ease of distribution in aerosol devices deteriorates
Solution Approach 1:
The patent modifies the polymer composition parameters by incorporating long-chain alkyl acrylate or methacrylate (at least 6 carbon atoms) which changes the polymer's interaction with aerosol propellants and improves its dispersibility in the aerosol formulation, enabling easier distribution while maintaining fixation
4Reliability
If the composition viscosity is increased to improve fixation, then shaping is improved, but sprayability deteriorates
Solution Approach 1:
The patent optimizes the viscosity parameter by controlling the molecular weight and composition of the fixing polymer and the concentration of cationic surfactants, achieving a balanced viscosity that provides adequate fixation while maintaining sufficient sprayability for effective application
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 effective hair fixation with reduced residue formation and improved sprayability, allowing for a satisfactory gel texture and ease of application, eliminating the need for additional thickening agents.
Implementation Method 1
combining a particular fixing polymer and a cationic surfactant
Implementation Method 2
forming a film on the surface of the keratin fibers to be fixed
Data Source
AI summary
Cosmetic composition for treating keratinic fibers comprises an anionic fixing polymer with vinyl lactam, ethylenically unsaturated carboxylic acid and alkyl (meth)acrylate units in which the alkyl groups have at least 6 carbon atoms, and a surfactant. The composition has a viscosity above 200 cps at 25[deg]C and a shear rate of 1 second -> 1>. Independent claims are also included for: (1) aerosol device containing a composition as above; (2) cosmetic treatment comprising applying a composition as above, especially to the hair.