Oil Resistant Adhesive for Transformers via Fluorinated Copolymer
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Solution Overview
Problem
Pressure-sensitive adhesives used in oily environments face challenges with adhesion loss and contamination, particularly at elevated temperatures, which can lead to decreased lifespan and catastrophic failure in applications like transformers.
Innovation Solution
A crosslinked copolymer adhesive comprising (meth)acrylic ester, methyl (meth)acrylate, vinyl ester, and functional monomers, such as (meth)acrylamide or hydroxyalkyl (meth)acrylate, which maintains adhesion and cohesive strength in oily environments without contaminating transformer oil, achieved through electron beam crosslinking without chemical agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pressure-sensitive adhesives are used in oily environments, then initial adhesion may be achieved, but adhesion strength and cohesive strength are lost due to oil saturation, particularly at elevated temperatures
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by incorporating fluorinated monomers (such as vinyl fluoride, fluoroethylene) in specific amounts (0.1-10 wt%) within the copolymer structure. This compositional parameter change provides oil resistance while maintaining adhesion and cohesive strength in oily environments at elevated temperatures
Solution Approach 2:
The patent creates a composite adhesive system by combining multiple monomers including (meth)acrylic acid, (meth)acrylates, vinyl esters, and fluorinated monomers into a single copolymer structure. This composite material approach allows the adhesive to simultaneously achieve tack, adhesion, cohesion, and oil resistance properties that individual polymers cannot provide
2Object-affected harmful factors
If oil-resistant adhesives like SBR or NBR are used, then resistance to oil is improved, but contamination of transformer oil occurs and adhesion properties are compromised
Solution Approach 1:
The patent modifies the adhesive composition by incorporating fluorinated monomers which provide inherent oil resistance without the need for traditional oil-resistant polymers like NBR or SBR. The fluorinated copolymer structure resists oil saturation while maintaining chemical stability, preventing contamination of transformer oil
Solution Approach 2:
The patent uses a synthetic fluorinated copolymer that can be precisely formulated to achieve the required performance characteristics. This allows for a tailored adhesive solution that provides adequate service life in transformer applications without the need for expensive natural rubber alternatives
3Ease of manufacture
If adhesive is used to bond components in transformers, then assembly is simplified, but the adhesive can contaminate transformer oil and degrade insulating properties
Solution Approach 1:
The patent changes the chemical parameters of the adhesive by using a fluorinated copolymer composition that is inherently resistant to oil contamination. This composition maintains its bonding function while preventing degradation of transformer oil insulating properties, thus preserving reliability
Solution Approach 2:
The adhesive composition is designed to be self-regulating in its interaction with transformer oil. The fluorinated copolymer structure naturally resists oil absorption and contamination, providing long-term stability without requiring additional protective measures or monitoring
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 adhesive maintains exceptional adhesion and cohesive strength in hot mineral oil, preventing contamination and ensuring the longevity and safety of transformer operations.
Implementation Method 1
achieved through electron beam crosslinking without chemical agents
Data Source
AI summary
The present disclosure provides an oil-resistant adhesive comprising a crosslinked copolymer of (meth)acrylic ester monomers, methyl (meth)acrylate monomers, vinyl ester monomers, and a functional monomer selected from one of (meth)acrylic acid, a (meth)acrylamide or a hydroxyalkyl (meth)acrylate monomers.