Fluoroelastomer Curing Agents Eliminating Surface Particles
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Solution Overview
Problem
Peroxide curing agents used in fluoroelastomers often result in residual solid particles on the surface of cured compounds, which are visible under magnification, affecting the surface appearance and performance of articles such as seals and gaskets.
Innovation Solution
Incorporating chemical entities with azo functional groups and oxazoline functional groups, along with a peroxide curing agent, into fluoroelastomer compounds to improve surface appearance by eliminating visible particles when viewed at high magnification, and enhancing thermal stability and chemical resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If peroxide curing agents are used to cure fluoroelastomer compounds, then the compounds achieve crosslinking and elastomeric properties, but residual solid particles form on the surface of cured articles, degrading surface appearance
Solution Approach 1:
The patent extracts and removes the harmful co-agent from the curing system. By using peroxide curing agents alone without co-agents, the invention eliminates the source of residual solid particles that cause surface defects, while still achieving adequate crosslinking of the fluoroelastomer compound
Solution Approach 2:
The patent changes the curing system composition by eliminating co-agents and using only peroxide curing agents. This parameter change in the curing chemistry modifies the reaction pathway to prevent particle formation while maintaining crosslinking efficiency
2Reliability
If co-agents are used with peroxide curing agents, then curing characteristics are modified, but insoluble residual materials form visible solid particles on the surface at 500x magnification
Solution Approach 1:
The invention removes co-agents from the curing system entirely. By extracting this component, the patent eliminates the chemical source that produces insoluble residual materials and visible surface particles, achieving a cleaner cured surface
Solution Approach 2:
The patent converts the potential harm of insufficient crosslinking (when co-agents are removed) into a benefit by optimizing peroxide curing agent selection and formulation, achieving both clean surfaces and adequate curing through alternative means
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 combination of azo and oxazoline functional groups with peroxide curing agents in fluoroelastomer compounds prevents the formation of visible particles on the surface of cured articles, improving their surface appearance and performance in high-temperature and chemical environments.
Implementation Method 1
Compounds comprising such cure sites may be cured by peroxide curing agents
Implementation Method 2
Upon crosslinking, the cure sites react with a curing agent to form a crosslinked elastomer entity
Implementation Method 3
one or more chemical entities selected from the group consisting of chemical entities comprising an azo functional group and chemical entities comprising an oxazoline functional group
Implementation Method 4
a fluoroelastomer comprising cure sites; one or more chemical entities selected from the group consisting of chemical entities comprising an azo functional group and chemical entities comprising an oxazoline functional group
Data Source
AI summary
A fluoroelastomer compound comprising at least one co-agent and at least one chemical entity comprising: (1) an azo functional group or (2) an oxazoline functional group, when cured into an article using a peroxide curing agent, the article exhibits no visible particles on the article surface when viewed at a magnification of 500 times that of an unmagnified image.