Anionic Dye Polymer Composition for Non-Buildup Fabric Shading
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Solution Overview
Problem
Current methods for incorporating high levels of dyes into fabrics are synthetically difficult and expensive, and existing dye polymers tend to build up on cellulosic fabrics over multiple washes, reducing their effectiveness.
Innovation Solution
Development of dye polymers with negatively charged groups that are easy to produce and maintain high dye levels, which are labile on cellulosic fabrics and do not substantially build up with washing, using a combination of dye monomers and alkene comonomers in a laundry detergent composition, along with a method of treating textiles with an aqueous solution of these polymers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If anionic reactive dyes bound to polysaccharide polymers are used for shading cellulosic garments, then shading benefit is achieved, but the polymers are synthetically difficult and expensive to make with high dye levels
Solution Approach 1:
The patent changes the chemical parameters of the dye polymer system by using acrylic acid or methacrylic acid monomers with specific dye molecules, creating polymers with controlled molecular weights and dye loadings that are easier and cheaper to manufacture while achieving high dye levels (up to 50 wt% or higher) effectively
Solution Approach 2:
The patent creates composite dye polymers by combining dye molecules with acrylic acid or methacrylic acid monomers through covalent bonding, forming a new material system that integrates the shading function with polymer structure, enabling high dye levels to be incorporated more easily and cost-effectively than traditional polysaccharide-based systems
2Reliability
If conventional dyes are used on cellulosic fabrics, then shading is achieved, but the dyes build up substantially with the number of washes, reducing effectiveness
Solution Approach 1:
The patent introduces dynamic behavior to the dye system by creating polymers with controlled molecular weights and charge densities that allow the dye to bind reversibly to cellulosic fabrics during washing, enabling the fabric to be re-shaded with each wash cycle rather than accumulating permanent deposits, thus maintaining consistent shading effectiveness
Solution Approach 2:
The patent modifies the electrostatic parameters of the dye system by using anionic dye polymers that interact with the cationic sites on cellulosic fabrics through controlled electrostatic attraction, allowing the dye to be deposited and removed in a controlled manner that prevents buildup while maintaining shading effectiveness over multiple washes
3Quantity of substance
If high levels of dyes are incorporated into polymers, then weight effectiveness for shading is improved, but the synthesis becomes more difficult and expensive
Solution Approach 1:
The patent optimizes the molecular weight parameters of the polymer backbone and the ratio of dye to monomer units to achieve high dye loadings (50 wt% or higher) while maintaining manageable synthesis conditions, using acrylic or methacrylic acid-based polymers that can be produced more easily than traditional high-dye-content systems
Solution Approach 2:
The patent segments the polymer structure into repeating units of dye-monomer complexes, allowing high dye levels to be achieved through simple copolymerization reactions rather than complex multi-step synthesis, making the manufacturing process more scalable and cost-effective
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 dye polymers effectively shade fabrics with high dye levels without building up over washes, providing a cost-effective and efficient solution for fabric treatment.
Implementation Method 1
the dye-polymer is obtainable by polymerisation of: (a) a dye monomer, the dye monomer comprising an alkene covalently bound to a dye
Implementation Method 2
The dye polymers are labile from cellulosic fabrics and do not build up substantially with the number of washes
Data Source
AI summary
The present invention provides a laundry treatment composition comprising an anionic dye-polymer.