Electrically Peelable Adhesive Composition for High-Temperature Stability
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Solution Overview
Problem
Existing electrically peelable adhesives lose their peelability when exposed to high temperatures over a long period, limiting their application in environments with elevated temperatures.
Innovation Solution
An electrically peelable adhesive composition is formulated with specific ratios of ionic liquid and alkyl ether of polyethylene glycol, along with an acrylic polymer, to maintain peelability even under high temperatures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional electrically peelable adhesive composition is used, then excellent electrical peelability is achieved at room temperature, but electrical peelability is reduced when exposed to high temperature environment over long period
Solution Approach 1:
The patent changes the chemical composition parameters of the adhesive by introducing a specific migration accelerator (alkyl ether of polyethylene glycol with controlled molecular weight) and adjusting the ionic liquid content ratio. This parameter modification enables the adhesive to maintain electrical peelability at high temperatures by controlling the migration rate of ionic liquid molecules, preventing premature depletion while ensuring effective peeling when needed.
Solution Approach 2:
The alkyl ether of polyethylene glycol acts as a migration accelerator intermediary between the ionic liquid and the adhesive matrix. It facilitates controlled diffusion of ionic liquid molecules to the adhesive-substrate interface, ensuring that sufficient ionic liquid reaches the peeling front even under high temperature conditions, thereby maintaining reliable electrical peelability.
2Reliability
If ionic liquid content is increased to improve electrical peelability, then peeling performance is enhanced, but adhesive strength and stability are reduced
Solution Approach 1:
The patent optimizes the ionic liquid content parameter to a specific range (30-90 parts by weight relative to 100 parts by weight of acrylic polymer) and introduces a migration accelerator at controlled concentration (5-45 parts by weight). This parameter optimization ensures sufficient ionic liquid for effective peeling while maintaining adequate adhesive strength through controlled distribution and migration rates.
Solution Approach 2:
The patent introduces dynamic control of ionic liquid distribution through the migration accelerator, which enables the ionic liquid to move from the bulk adhesive to the interface dynamically during the peeling process. This dynamic migration ensures that ionic liquid is available at the peeling front without requiring excessive overall concentration, thereby maintaining adhesive strength.
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 ensures excellent electrical peelability even at high temperatures, allowing easy removal from conductive objects by applying a voltage without the need for UV irradiation or heating.
Implementation Method 1
peeling the adhesive by means of stimulation such as light, heat, vibration or electric current
Implementation Method 2
using a polymer and ionic liquid for the adhesive
Data Source
AI summary
The present invention is to address the problem of providing an electrically peelable adhesive product having excellent electrical peelability even under conditions where the adhesive product is exposed to high temperature conditions over a long period of time. The problem is solved by an electrically peelable adhesive composition comprising an acrylic polymer, an ionic liquid and an alkyl ether of a polyethylene glycol, wherein a content of the ionic liquid is more than 30 parts by weight and 90 parts by weight or less relative to 100 parts by weight of the acrylic polymer and a content of the alkyl ether of the polyethylene glycol is 5 parts by weight to 45 parts by weight relative to 100 parts by weight of the acrylic polymer.