Water-Soluble Polyamide Chelators for Stable Adhesives
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Solution Overview
Problem
Existing polymers used in adhesive, detergent, and cosmetic compositions often lack environmental friendliness and stability, particularly under alkaline conditions, leading to hair damage during oxidative hair treatments due to the presence of redox metal ions and the use of poorly biodegradable chelating agents like EDTA.
Innovation Solution
Development of polyamide polymers synthesized through processes involving itaconic acid and di- or triamines, which are water-soluble over a broad pH range, stable against light, heat, and oxygen, and do not contain lactam or pyrrolidinone structures, offering improved performance as functional additives in compositions and enhanced chelating properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional chelating agents like EDTA are used to complex metal ions, then chelating performance is improved, but biodegradability deteriorates and environmental friendliness worsens
Solution Approach 1:
The patent changes the chemical structure parameters of chelating agents by using itaconic acid-based polymers with specific molecular weights (1,000-10,000 g/mol) and functional group compositions, transforming conventional small-molecule chelators into biodegradable polymeric chelators that maintain effectiveness while improving environmental compatibility
Solution Approach 2:
The invention creates composite chelating systems by combining itaconic acid units with various amine components to form polyamide polymers with tailored properties, integrating multiple functional groups (carboxyl, amide, and residual chelating groups) into a single biodegradable chelating agent
2Object-generated harmful factors
If polyimide and pyrrolidinone polymers are used as functional additives, then environmental friendliness is improved through bio-based content, but stability against light, heat, and oxygen deteriorates
Solution Approach 1:
The patent modifies the polymer structure by controlling the molecular weight (1,000-10,000 g/mol) and functional group composition of itaconic acid-based polymers, optimizing the balance between environmental compatibility and stability against degradation factors while maintaining water solubility across broad pH ranges
Solution Approach 2:
The invention employs biodegradable polymeric chelators that can perform their function and then decompose naturally, replacing persistent conventional chelators with environmentally benign alternatives that break down after use, accepting temporary performance for long-term ecological benefit
3Reliability
If high molecular weight polymers are used in adhesive compositions, then performance is improved, but water solubility deteriorates
Solution Approach 1:
The patent optimizes the molecular weight parameter to a specific range (1,000-10,000 g/mol) that balances adhesive performance requirements with water solubility needs, creating polymers that are sufficiently large for performance but small enough to dissolve effectively in water across broad pH ranges
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 polyamide polymers enhance the performance of adhesive, detergent, and cosmetic compositions, improve washing performance, and reduce hair damage by effectively complexing redox metal ions, thereby minimizing the generation of reactive oxygen species during hair treatments.
Implementation Method 1
The redox metal ions, especially copper or iron, catalyse the redox reaction with hydrogen peroxide under alkaline conditions and lead to the generation of reactive oxygen species (ROS)... Complexing agents such as ethylenediaminetetraacetic acid (EDTA)... are therefore used in blonding agents to mask corresponding metal ions
Data Source
AI summary
A specific polyamide polymer which is obtainable by two specific processes according to the invention. The invention further relates to the use of this polyamide polymer as a functional additive and to detergent compositions, cosmetic compositions, cleaning compositions and adhesive compositions including this polyamide polymer.