Polymer Composition for Anionic Dye Anchoring Without Phenol Yellowing
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Solution Overview
Problem
Dyed textiles with anionic dyes suffer from unsatisfactory color fastness due to weak ionic bonds, leading to issues like color loss during wear, washing, and exposure to light, and existing fastness enhancers like phenols and formaldehyde-based compounds pose health and environmental risks.
Innovation Solution
A polymer with specific repeating units and salt forms, including sodium styrene sulfonate and acrylic acid, is used to anchor dyes through hydrophobic and π interactions, providing excellent color fastness without yellowing or health hazards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If phenols, bisphenols, or formaldehyde-based compounds are used as color fastness enhancers, then dye anchoring is improved, but health and environmental safety deteriorates due to harmful substances
Solution Approach 1:
The invention extracts and eliminates harmful substances (phenols, bisphenols, formaldehyde) from the color fastness enhancer composition, replacing them with safe polymer components that maintain dye anchoring effectiveness without the associated health and environmental risks
Solution Approach 2:
The invention uses safe, non-harmful polymer components that can be applied and rinsed off, replacing persistent harmful chemicals with benign alternatives that achieve the same functional purpose without long-term environmental or health impacts
2Reliability
If phenolic constituents are used in post-treatment agents, then dye anchoring is improved, but substrate stability deteriorates due to yellowing from UV light
Solution Approach 1:
The invention removes phenolic constituents from the post-treatment agent formulation, eliminating the cause of UV-induced yellowing while preserving the dye anchoring function through alternative safe polymer components
Solution Approach 2:
The invention introduces safe polymer intermediaries that perform the dye anchoring function without the harmful side effects of phenolic compounds, acting as mediators between the dye and substrate that do not cause yellowing
3Ease of manufacture
If ionic bonds are used to anchor anionic dyes to substrates, then dye application is simplified, but color fastness deteriorates due to weak bond strength
Solution Approach 1:
The invention uses composite polymer materials containing multiple functional groups (sulfonate, carboxylate, phosphonate) that provide both ease of application and strong, stable anchoring through multiple interaction mechanisms beyond simple ionic bonding
Solution Approach 2:
The invention changes the chemical parameters of the anchoring mechanism by using polymers with multiple functional groups that can form various types of bonds (ionic, coordination, hydrophobic interactions) with both dye and substrate, thereby strengthening the overall anchoring while maintaining application simplicity
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 polymer achieves strong dye anchoring, ensuring minimal color loss under mechanical stress, washing, perspiration, and UV exposure, with improved handling and storage stability.
Implementation Method 1
the dye can be anchored strongly to a substrate... essentially through hydrophobic and π interactions of the aromatic groups
Implementation Method 2
the dye can be anchored strongly to a substrate... essentially through hydrophobic and π interactions of the aromatic groups
Data Source
AI summary
The present invention relates to a partially neutralized polymer, a method for its production and its use for the finishing of substrates.