Fluorosilicone Surface Treatment for Soft, Repellent Textiles
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Solution Overview
Problem
Conventional fluorocarbon polymer treatments for textiles often impart harsh feel and compromise water and oil repellency when attempting to provide both properties simultaneously.
Innovation Solution
A fluorine-containing polymer is developed by polymerizing a fluorine-containing monomer in the presence of a functional organopolysiloxane, combining fluorine-containing acrylate and cyclic hydrocarbon groups with mercapto-, vinyl-, (meth)acrylamide-, or (meth)acrylate-functional organopolysiloxanes to create a fluorosilicone product that offers excellent water and oil repellency while maintaining a soft feel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fluorocarbon polymer treatments are applied to provide water and oil repellency, then repellent properties are improved, but fabric feel becomes harsh
Solution Approach 1:
The patent combines fluorocarbon polymer and silicone polymer into a single composite treatment composition. The fluorocarbon component provides water and oil repellency, while the silicone component provides softness and improved fabric feel. This merging allows both contradictory properties to coexist in the final treated fabric.
Solution Approach 2:
The invention uses a composite material system consisting of fluorocarbon polymer and silicone polymer in a treatment composition. This composite approach allows the fabric to simultaneously exhibit the repellent properties from fluorocarbon and the softness from silicone, resolving the contradiction between durability and comfort.
2Reliability
If conventional fluorocarbon polymer treatments are used, then water and oil repellency is achieved, but durability of repellent properties decreases
Solution Approach 1:
The treatment composition merges fluorocarbon polymer for durable repellency with silicone polymer for softness. The synergistic combination ensures that the fabric maintains both long-lasting water and oil repellency and improved hand feel, overcoming the limitations of using fluorocarbon polymer alone.
3Ease of operation
If silicone compound is added to improve fabric feel, then softness is improved, but water and oil repellency decreases
Solution Approach 1:
The patent creates a balanced composite treatment where fluorocarbon polymer and silicone polymer work together. The fluorocarbon component ensures water and oil repellency is maintained while the silicone component provides softness, with neither component compromising the other's functionality when used in the specified composition ratios.
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 fluorosilicone product effectively imparts durable water and oil repellency, soil resistance, and improved feel to textiles, outperforming conventional treatments by maintaining softness while enhancing repellent properties.
Implementation Method 1
a fluorine-containing polymer which is formed from a monomer (A) comprising a fluorine-containing monomer and which is polymerized in the presence of a functional organopolysiloxane
Data Source
AI summary
A surface treatment agent, which can impart the excellent water- and oil-repellency, soil resistance and feeling to the substrate, is obtained from a fluorine-containing polymer which contains: (A) a monomer which comprises; (A1) a fluorine-containing monomer of the formula: CH2═C(—X)—C(═O)—Y—Z—Rf wherein X is a hydrogen atom, a monovalent organic group, or a halogen atom, Y is —O— or —NH—, Z is a direct bond or a divalent organic group, and Rf is a fluoroalkyl group having 1 to 20 carbon atoms, and (A2) a (meth)acrylate monomer having a cyclic hydrocarbon group, and (B) at least one functional organopolysiloxane selected from the group consisting of a mercapto-functional organopolysiloxane, a vinyl-functional organopolysiloxane, a (meth)acrylamide-functional organopolysiloxane and a (meth)acrylate-functional group.