Polyurethane Thickener Reduces Polymer Load in Hydrogen Peroxide Agents
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Solution Overview
Problem
Existing color-changing preparations for keratin fibers, such as hair, face challenges in achieving optimal viscosity for application and retention, often requiring high concentrations of anionic polymeric thickeners that can cause production issues and flowability problems, while also needing reduced polymer content to avoid equipment blockages and improve miscibility.
Innovation Solution
A hydrogen peroxide-based agent containing a combination of an anionic polymer thickener and a polyurethane, specifically a polycondensate of polyethylene glycol, diisocyanate, and ethoxylated fatty alcohol, which adjusts viscosity without increasing polymer load, ensuring good miscibility and application properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If high concentrations of anionic polymeric thickeners are used to achieve optimal viscosity for application and retention, then the viscosity is improved, but production issues and equipment blockages occur
Solution Approach 1:
A polyurethane thickening agent is introduced as an intermediary substance to mediate between the anionic polymeric thickener and the final formulation. This polyurethane component enhances viscosity while preventing the equipment blockages and production issues associated with high concentrations of anionic polymers alone
Solution Approach 2:
The invention uses a composite thickening system combining anionic polymeric thickeners with polyurethane thickening agents. This composite approach leverages the viscosity-enhancing properties of anionic polymers while the polyurethane component prevents their harmful effects on manufacturing equipment and flowability
2Stability of the object's composition
If high concentrations of anionic polymeric thickeners are used to maintain viscosity during application, then the agent retention is improved, but the miscibility and flowability deteriorate
Solution Approach 1:
The polyurethane thickening agent serves as an intermediary that maintains agent retention on hair fibers while preserving the flowability and miscibility of the formulation. It mediates between the need for high viscosity (for retention) and the need for good flow properties (for application)
Solution Approach 2:
The invention changes the chemical composition parameters by introducing polyurethane thickening agents with specific molecular structures that provide viscosity at lower concentrations. This parameter change allows the formulation to maintain both high retention and good flowability simultaneously
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 allows for reduced anionic polymer thickener usage, minimizing production issues and maintaining desired viscosity, ensuring the agent can be easily applied and retained on hair fibers, while maintaining effective color-changing performance.
Implementation Method 1
polymeric thickeners in the ready-to-use color change preparation
Implementation Method 2
hydrogen peroxide as well as a bleaching powder and/or an alkalizing preparation
Data Source
AI summary
The invention relates to an agent which comprises at least hydrogen peroxide, at least one homopolymer or copolymer of acrylic acid and/or methacrylic acid and at least one polyurethane in a cosmetically suitable carrier, wherein the polyurethane is a polycondensate made of polyethylene glycol(s), diisocyanate(s) and optionally ethoxylated fatty alcohol(s).