Fluorine-Containing Polymer Composition for Roll-Release Repellency
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Solution Overview
Problem
Existing water- and oil-repellent compositions face issues with polymer adhesion to treatment rolls during processing, leading to roll soil and instability, particularly when the carbon number of the fluoroalkyl group is 6 or less, resulting in lower melting points and higher tackiness.
Innovation Solution
A fluorine-containing polymer is developed through a 2-stage polymerization process, where a first polymer is formed from a fluorine-containing monomer and a second polymer is polymerized in its presence, using halogenated olefin monomers to create a composition that prevents roll adhesion and maintains high water- and oil-repellency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the carbon number of the fluoroalkyl group is 6 or less, then the polymer has lower melting point and easier processing, but the polymer has higher tackiness and adheres to treatment rolls
Solution Approach 1:
The invention divides the polymer into two distinct segments: a core polymer containing the fluoroalkyl group (with carbon number 6 or less) that provides water- and oil-repellency, and a shell polymer with adhesive groups that prevents roll adhesion. This segmentation allows each segment to perform its specific function without the drawbacks of the other.
Solution Approach 2:
The invention creates a composite polymer structure where a core polymer (providing repellency) is combined with a shell polymer (providing anti-adhesion). The composite structure integrates the beneficial properties of both components: the low melting point and repellency of the fluoroalkyl-containing core, and the roll-release properties of the adhesive-group-containing shell.
2Strength
If a polymer with high tackiness is used, then the polymer has better adhesion to substrates, but the polymer adheres to treatment rolls causing roll soil
Solution Approach 1:
The invention applies local quality by concentrating different functional groups in different regions of the polymer structure. The core polymer provides strong adhesion to the substrate through its fluoroalkyl groups, while the shell polymer provides release from the treatment roll through its adhesive groups. Each region performs its specific function locally without interfering with the other.
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 resulting composition effectively imparts excellent water- and oil-repellency to substrates while preventing polymer adhesion to treatment rolls, ensuring high durability and stability during processing.
Implementation Method 1
the fluorine-containing compounds have the advantageous effects of having properties excellent in heat resistance, oxidation resistance, weather resistance and the like. The fluorine-containing compounds are used as, for example, the water- and oil-repellent agent and soil release agent by utilizing the properties that the fluorine-containing compounds have low free energy, i.e., difficulty in adherence.
Implementation Method 2
a method for producing a fluorine-containing polymer comprising a first polymer formed from a first monomer, and a second polymer formed from a second monomer, wherein the second monomer is polymerized in the presence of the first polymer
Data Source
AI summary
Provided is a water and oil repellent composition that provides water and oil repellency that is excellent for base materials such as textile products, and is excellent for preventing adhesion of polymers on rolls during processing. The present invention involves a method for manufacturing a fluorine-containing polymer comprising a first polymer formed from a first monomer, and a second polymer formed from a second monomer. The manufacturing method includes: (I) a step for obtaining the first polymer by polymerizing the first monomer; and (II) a step for obtaining the second polymer by preparing and polymerizing the second monomer in the presence of the first polymer. The first monomer and/or the second monomer includes a fluorine-containing monomer (a), and both the first monomer and the second monomer include a halogenated olefin (b).