Radiation-Crosslinked Fluoroelastomer Sealing Material for Faster Mixing

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Solution Overview

Problem

Conventional crosslinkable fluoroelastomer compositions require long mixing times for uniformity, result in poor sheeting properties during molding, and lack desired physical properties such as tensile strength and elongation, making them unsuitable for high-performance sealing applications.

Innovation Solution

A sealing material composed of a crosslinkable fluoroelastomer with 66-68% fluorine content and a crosslinking aid to crosslinking agent ratio of 4 or more, irradiated to form a radiation-crosslinked body, enhancing moldability and physical properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of time

If a conventional crosslinkable fluoroelastomer is used with liquid or oily components, then the composition can be formulated, but it takes a long time to achieve uniform mixing

Engineering Contradiction:

Improvemixing timeVSAvoiduniformity of elastomer composition

Core Design Contradiction:

Loss of timeVSStability of the object's composition

Solution Approach 1:

The patent changes the physical state parameter of the crosslinking aid from liquid/oily to solid powder form. This parameter change fundamentally alters the mixing characteristics, enabling rapid and uniform distribution throughout the fluoroelastomer without the prolonged mixing times associated with liquid components.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent employs a solid crosslinking aid that can be quickly and uniformly dispersed, effectively replacing the need for prolonged mixing processes. The solid form allows for efficient incorporation and uniform distribution, making the mixing process faster and more reliable.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Ease of manufacture

If a conventional elastomer composition is used for sheeting, then the composition can be processed, but it is not caught well between rolls and sheeting property is poor

Engineering Contradiction:

Improvesheeting propertyVSAvoidmoldability

Core Design Contradiction:

Ease of manufactureVSProductivity

Solution Approach 1:

The patent changes the physical state parameter of the crosslinking aid from liquid to solid, which fundamentally improves the rheological properties of the elastomer composition. This parameter change enables the composition to be effectively caught between rolls during sheeting, dramatically improving sheeting property and moldability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent replaces the mechanical mixing and sheeting challenges associated with liquid crosslinking aids by using a solid crosslinking aid that naturally provides better adhesion and handling characteristics during the sheeting process, reducing the need for complex mechanical adjustments.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Strength

If a conventional elastomer composition is used, then the composition can be formed, but the sealing material lacks desired physical properties such as tensile strength and elongation

Engineering Contradiction:

Improvetensile strength and elongationVSAvoidsealability

Core Design Contradiction:

StrengthVSEase of manufacture

Solution Approach 1:

The patent creates a composite system by combining fluoroelastomer with a solid crosslinking aid and crosslinking catalyst, forming a unified elastomer composition that achieves both excellent processability and superior physical properties including high tensile strength and elongation after crosslinking.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent changes the chemical composition parameters by introducing a solid crosslinking aid with specific functional groups that react with the fluoroelastomer to form a crosslinked network. This compositional change enables the material to achieve desired physical properties while maintaining ease of manufacture.

Inventive Principle:

Principle #35Parameter changes

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 sealing material exhibits improved moldability, sealability, tensile strength, and elongation, making it suitable for semiconductor manufacturing and plasma processing applications with balanced hardness, tensile strength, and resistance to plasma and chemicals.

Implementation Method 1

a sealing material that is a radiation-crosslinked body of an elastomer composition including a crosslinkable fluoroelastomer (A) other than a perfluoroelastomer, a crosslinking agent, and a crosslinking aid

Methodology Applied

Scientific EffectRadiation crosslinking: Radiation

Data Source

PatentEP4219644B1Sealing material and method for producing sealing material

Publication Date: 2025.10.22 VALQUA LTD

AI summary

One embodiment of the present invention relates to a sealing material or a method for producing a sealing material, in which the sealing material is a radiation-crosslinked body of an elastomer composition including a crosslinkable fluoroelastomer (A) other than a perfluoroelastomer, a crosslinking agent, and a crosslinking aid, and the fluoroelastomer (A) contains a crosslinkable fluoroelastomer (A1) that is other than a perfluoroelastomer and has a fluorine content in a range of 66 to 68% by mass.