Vulcanization Bonding Composition for Epichlorohydrin-Fluororubber Lamination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vulcanization bonding compositions struggle to achieve strong adhesion between epihalohydrin rubber and fluororubber, particularly when using steam vulcanization molding, which is known to result in poor adhesion due to direct steam contact with the rubber.
Innovation Solution
A vulcanization bonding composition containing epihalohydrin rubber, hydroxyl group-free tri- to penta-functional acrylate, epoxy resin, nickel dibutyldithiocarbamate, and a vulcanizing agent, which are stacked with a fluororubber layer containing a peroxide vulcanizing agent, allowing for strong bonding even through steam vulcanization molding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If steam vulcanization molding is used, then manufacturing ease is improved, but adhesion strength deteriorates
Solution Approach 1:
The patent introduces a specific chemical composition as an intermediary layer between the epihalohydrin rubber and fluororubber. This composition contains a polyfunctional (meth)acrylate compound and a vulcanizing agent that act as mediators to promote chemical bonding between the two rubber layers during steam vulcanization, thereby maintaining adhesion strength while using the easier steam vulcanization process
Solution Approach 2:
The patent changes the chemical parameters of the rubber composition by adding specific compounds (polyfunctional (meth)acrylate compound with two or more (meth)acryloyl groups per molecule and a vulcanizing agent). This chemical parameter change enables the rubber to achieve strong adhesion through steam vulcanization by creating crosslinked structures that resist steam interference
2Reliability
If fluororesin is used as barrier layer, then fuel barrier properties are improved, but flexibility deteriorates
Solution Approach 1:
The patent creates a composite laminate structure combining fluororubber (providing fuel barrier properties) with epihalohydrin rubber (providing flexibility). The composite structure allows each material to contribute its advantageous properties while the strong interfacial bonding ensures they work together as an integrated system, preventing delamination and maintaining overall performance
3Reliability
If epihalohydrin rubber and fluororubber are laminated, then fuel barrier properties are improved, but adhesion deteriorates
Solution Approach 1:
The patent introduces a specific chemical composition as an intermediary layer between the epihalohydrin rubber and fluororubber. This composition contains a polyfunctional (meth)acrylate compound and a vulcanizing agent that act as mediators to promote chemical bonding between the two rubber layers during steam vulcanization, thereby maintaining adhesion strength while using the easier steam vulcanization process
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 composition achieves high adhesion between the rubber and fluororubber layers, enabling successful vulcanization even by steam vulcanization molding, which is typically inferior in adhesion.
Implementation Method 1
a vulcanization bonding composition at least containing (a1) an epihalohydrin rubber, (a2) a hydroxyl group-free tri- to penta-functional acrylate, (a3) an epoxy resin, (a4) nickel dibutyldithiocarbamate, and (a5) a vulcanizing agent
Implementation Method 2
a fluororubber layer (B) formed from a fluororubber composition containing at least a peroxide vulcanizing agent
Implementation Method 3
the rubber layer (A) and the fluororubber layer (B) are stacked, the composition for a vulcanization-bonded laminate can be vulcanized, even by steam vulcanization molding
Data Source
AI summary
The present invention aims to provide a composition for a vulcanization-bonded laminate in which an epichlorohydrin rubber can be strongly bonded to a fluororubber, as well as a laminate produced from the composition. It has been found that a composition for a vulcanization-bonded laminate which includes a rubber layer (A) formed from a vulcanization bonding composition at least containing an epihalohydrin rubber, a hydroxyl group-free tri- to penta-functional acrylate, an epoxy resin, nickel dibutyldithiocarbamate, and a vulcanizing agent, and a fluororubber layer (B) formed from a fluororubber composition containing at least a peroxide vulcanizing agent, and in which the rubber layer (A) and the fluororubber layer (B) are stacked can be used to produce a laminate in which the rubber layer (A) is strongly bonded to the fluororubber layer (B).