Suede type artificial leather with soiling protection property and preparation therefor
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Solution Overview
Problem
Existing artificial leather products require additional soiling protection additives, such as fluorine-based or silicone-based surfactants, which are not chemically bonded and can migrate over time, leading to surface changes and reduced durability.
Innovation Solution
A suede-type artificial leather is developed using a fluorine-containing modified polyurethane, synthesized through a polymerization reaction between a urethane prepolymer and a fluorinated carbon compound, eliminating the need for separate additives and enhancing chemical bonding for improved durability and water repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorine-based or silicone-based surfactants are mixed with polyurethane to provide soiling protection, then soiling protection function is improved, but reliability deteriorates due to chemical bonding issues and surfactant migration
Solution Approach 1:
The patent combines the soiling protection function and the elastomer matrix into a single integrated fluorine-containing modified polyurethane molecule. The fluorinated side chains are chemically bonded to the polyurethane backbone, merging the surfactant function with the structural material, eliminating the need for separate surfactant additives and preventing migration issues.
Solution Approach 2:
The invention creates a composite molecular structure where fluorinated side chains are chemically incorporated into the polyurethane elastomer matrix. This composite approach integrates the hydrophobic fluorine chains with the polyurethane backbone, forming a unified material that provides both elastomeric properties and soiling protection through chemical bonding.
2Reliability
If fluorine-containing side chains are bonded to urethane compound to improve water repellency, then water repellency is improved, but device complexity increases due to additional synthesis steps
Solution Approach 1:
The patent incorporates fluorinated side chains during the polyurethane synthesis process itself, performing the modification action in advance rather than as a separate post-treatment step. The fluorinated diol is used as a raw material in the polymerization reaction, building the soiling protection function into the elastomer matrix from the beginning.
3Reliability
If separate soiling protection additives are added to artificial leather, then soiling protection is improved, but manufacturing complexity increases
Solution Approach 1:
The fluorine-containing modified polyurethane serves multiple functions simultaneously: it acts as the elastomer matrix providing mechanical properties, and as the soiling protection agent providing water and oil repellency. This multi-functionality eliminates the need for separate surfactant additives and simplifies the manufacturing process by reducing the number of components and steps required.
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 artificial leather exhibits excellent soiling protection and water repellency without the need for additional surfactants, reducing surface changes and simplifying manufacturing, while maintaining mechanical and chemical properties.
Implementation Method 1
a product obtained by a polymerization reaction between a urethane prepolymer having isocyanate groups at terminals and a fluorinated carbon compound having hydroxy functional groups at both terminals
Implementation Method 2
eliminating the need for separate additives and enhancing chemical bonding for improved durability and water repellency
Implementation Method 3
The artificial leather exhibits excellent soiling protection and water repellency without the need for additional surfactants
Data Source
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AI summary
The present invention relates to a suede type artificial leather having antifouling property in which a polymeric elastomer is impregnated in a nonwoven fabric formed by three-dimensionally interlacing ultrafine fibers and raising is formed, wherein the polymeric elastomer is a fluorine-containing modified polyurethane, and the fluorine-containing modified polyurethane is a product obtained by a polymerization reaction between a urethane prepolymer having isocyanate groups at terminals, obtained by reacting a diol and a diisocyanate, and a fluorinated carbon compound having hydroxy functional groups at both terminals, and has a weight average molecular weight (Mw) of 500,000 to 800,000. According to the present invention, the suede type artificial leather is prepared by using a fluorine-containing polyurethane elastomer having antifouling property during the preparation of the artificial leather, thus a separate fluorine-based surfactant for an antifouling property does not need and the surface change with the passage of time of the artificial leather caused by using a fluorine-based surfactant does not occur.