Fluoroelastomer Composition with Reduced Polymer I Content
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Solution Overview
Problem
Existing compositions containing fluoroelastomers often have a significant content of polymers with specific polymerization units, which can hinder the smooth crosslinking process and affect the physical properties of the resulting fluoroelastomer.
Innovation Solution
A composition comprising a polymer with a specific polymerization unit and a fluoroelastomer, where the content of the polymer with the specific polymerization unit is significantly reduced to 0.0001 to 1.0% by mass based on the fluoroelastomer, facilitating smooth crosslinking and enhancing physical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If polymerization is carried out in an aqueous medium in the presence of a polymer containing polymerization units based on fluorinated vinyl ether monomers, then fluoropolymer can be produced, but the content of the polymer with specific polymerization units becomes significant and hinders smooth crosslinking
Solution Approach 1:
The patent changes the concentration parameter of the polymer (I) in the composition to be 0.0001 to 1.0% by mass based on the fluoroelastomer. This parameter change resolves the contradiction by maintaining enough polymer (I) to facilitate crosslinking initiation while reducing it sufficiently to prevent interference with crosslinking smoothness and physical properties.
2Productivity
If the content of polymer (I) is reduced to improve crosslinking efficiency, then crosslinking time is shortened and compression set is reduced, but the polymerization process becomes more difficult to control
Solution Approach 1:
The patent precisely defines the concentration parameter of polymer (I) as 0.0001 to 1.0% by mass based on fluoroelastomer. This narrow but well-defined parameter range resolves the contradiction by providing enough polymer for crosslinking initiation while minimizing interference, achieving both high crosslinking efficiency and controllable composition.
3Ease of manufacture
If polymer (I) is present in significant content, then polymerization can proceed, but the physical properties of the resulting fluoroelastomer are affected
Solution Approach 1:
The patent sets the polymer (I) content parameter to 0.0001 to 1.0% by mass based on fluoroelastomer. This parameter change resolves the contradiction by maintaining sufficient polymer (I) for polymerization while reducing it enough to ensure excellent physical properties including tensile strength, elongation, and compression set of the final product.
Data Source
AI summary
Provided is a composition containing: a polymer (I) having a polymerization unit (I) based on a monomer (I) represented by general formula (I); and a fluoroelastomer, wherein a content of the polymer (I) is 0.0001 to 1.0% by mass based on the fluoroelastomer: CX1X3=CX2R(-CZ1Z2-A0)m (I) wherein X1 and X3 are each independently F, Cl, H, or CF3; X2 is H, F, an alkyl group, or a fluorine-containing alkyl group; A0 is an anionic group; R is a linking group; Z1 and Z2 are each independently H, F, an alkyl group, or a fluorine-containing alkyl group; and m is an integer of 1 or more.