Comb-Shaped Polysiloxane Copolymers for Wash-Durable Hydrophilic Textiles
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Solution Overview
Problem
Existing silicone-based treatments for textiles and fibrous materials face challenges in maintaining softness, elasticity, and hydrophilicity while resisting washing and exposure to harsh detergents, and they often require high quantities and material costs.
Innovation Solution
Development of polyamino-polysiloxane and polyammonium-polysiloxane copolymer compounds with specific repeating units and alkylene oxide structures that enhance hydrophilicity and substantivity, allowing for reduced dosage and cost while maintaining softness and elasticity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If polysiloxanes with amino groups are used as textile plasticizers, then softness is improved, but substantivity (resistance to washing out) deteriorates
Solution Approach 1:
The patent creates composite polyamino-polysiloxane copolymers combining siloxane backbone with polyalkylene oxide side chains and quaternary ammonium groups. This composite structure integrates the softness-providing siloxane component with the substantivity-enhancing quat component, resolving the contradiction between softness and wash resistance
Solution Approach 2:
The invention introduces quaternary ammonium groups at specific locations (local positions) on the polysiloxane chain, particularly at the ends of polyalkylene oxide side chains. This localized placement of cationic groups provides substantivity without compromising the overall softness provided by the siloxane structure
2Quantity of substance
If alkylene oxide groups are introduced to increase hydrophilicity, then moisture absorption is improved, but substantivity (resistance to washing out) deteriorates
Solution Approach 1:
The patent places quaternary ammonium groups specifically at the terminal positions of polyalkylene oxide side chains rather than throughout the entire structure. This localized quaternization maintains the hydrophilic character of the alkylene oxide groups while providing anchor points for substantivity, resolving the contradiction between hydrophilicity and wash resistance
Solution Approach 2:
The copolymer structure combines hydrophilic polyalkylene oxide segments with substantivity-providing quaternary ammonium groups in a unified molecular architecture, allowing both properties to coexist and function synergistically
3Reliability
If high quantities of silicone-based treatments are applied to maintain softness and substantivity, then performance is improved, but material costs and dosage increase
Solution Approach 1:
The invention changes the chemical parameters of the polysiloxane treatment by incorporating quaternary ammonium groups, which fundamentally alter the interaction with textile fibers. This parameter change increases substantivity per unit of material, reducing the required dosage while maintaining or improving performance
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 compounds provide improved hydrophilicity and substantivity, reducing the tendency of treated materials to wrinkle and improving their moisture absorption, while maintaining silicone-like softness and elasticity, even under harsh washing conditions.
Implementation Method 1
The compounds provide improved hydrophilicity and substantivity, reducing the tendency of treated materials to wrinkle and improving their moisture absorption
Data Source
AI summary
The invention concerns polyamino and/or polyammonium/polysiloxane copolymer compounds with polyalkylene oxide units in comb-shaped arrangement, a method for producing said compounds and their use, in particular for treating textiles and other natural or synthetic textile materials.