Polyether Polyester Dye Transfer Inhibition
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Solution Overview
Problem
Conventional detergents often cause dye transfer from dyed textiles to undyed or differently colored textiles during washing, leading to unwanted color changes and losses, due to the high affinity of polymers for dyes.
Innovation Solution
The use of polyether polyesters, synthesized by reacting dicarboxylic compounds, polyol compounds with multiple hydroxyl groups, water-soluble alkylene oxide addition products, and diol compounds, which are incorporated into detergents to inhibit dye transfer by forming a repellent action on dye molecules during the washing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If conventional polymers with high affinity for dyes are used in detergents, then dye transfer inhibition should be improved, but actually greater colour losses occur from washed textiles
Solution Approach 1:
The patent changes the chemical parameters of the polymer by specifying precise compositional ratios: 20-50 mole% dicarboxylic acid, 10.1-50 mole% polyol with at least 3 OH-groups, 10.1-50 mole% alkylene oxide addition product, and 0-30 mole% diol. These parameter changes create a polymer with optimized dye interaction properties that inhibit transfer without causing excessive colour loss.
Solution Approach 2:
The invention uses a composite polymer structure combining multiple functional components: dicarboxylic acid units, polyol units with multiple hydroxyl groups, alkylene oxide addition products, and diol units. This composite material approach creates a detergent additive with balanced properties for dye transfer inhibition while minimizing harmful effects on textile coloration.
2Stability of the object's composition
If polymers are added to detergents to prevent dye dissolution and deposition, then colour appearance stability should be improved, but the complexity of detergent formulation increases
Solution Approach 1:
The polymer composition serves multiple functions simultaneously: it acts as a dye transfer inhibitor, a washing auxiliary, and a color protection agent. The same compositional formula (with specified ranges of dicarboxylic acid, polyol, alkylene oxide addition product, and diol) provides comprehensive color protection throughout the washing process, reducing the need for multiple separate additives.
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 polyether polyesters effectively reduce dye transfer and fading, maintaining color consistency, particularly when washing cotton and synthetic fibers, with a pronounced effect on preventing staining of white textiles.
Implementation Method 1
It is conceivable that the polyether polyesters attach themselves to the textiles during washing and have a repellent action on the dye molecules present in the liquor.
Implementation Method 2
have a repellent action on the dye molecules present in the liquor
Data Source
AI summary
The present invention improves dye transfer inhibition in the washing of textiles by the use of suitable polyether polyesters.