Curable Perfluoropolyether Adhesive for Low-Adhesion Applications
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Solution Overview
Problem
Conventional silicone adhesives, while effective for most applications, lack sufficient chemical and solvent resistance for specific uses like barcode labels and medical examination processes, and their high adhesion can damage substrates with low strength.
Innovation Solution
A curable perfluoropolyether adhesive composition comprising a linear perfluoropolyether compound with alkenyl groups, an organosilicon compound with silicon-bonded hydrogen atoms, and a hydrosilylation-reaction catalyst, which produces a cured product with low adhesion (<0.5 N/25 mm) while maintaining excellent heat resistance, chemical resistance, and solvent resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional silicone adhesives are used, then good heat resistance and chemical resistance are achieved, but adhesion is too high causing substrate damage
Solution Approach 1:
The invention changes the chemical composition parameters of the adhesive by using perfluoropolyether compounds instead of conventional silicone adhesives. This parameter change results in reduced adhesion strength while maintaining other protective properties, thereby preventing substrate damage during detachment.
Solution Approach 2:
The invention creates a composite adhesive system combining perfluoropolyether compound (A), organosilicon compound (B), and hydrosilylation-reaction catalyst (C). This composite material achieves the desired low adhesion property while maintaining heat resistance and chemical resistance that single materials cannot provide.
2Reliability
If conventional silicone adhesives are used, then sufficient performance for most uses is achieved, but chemical resistance and solvent resistance are insufficient for specific applications
Solution Approach 1:
The invention changes the chemical composition by incorporating perfluoropolyether structures which provide superior chemical and solvent resistance. This parameter change expands the applicability to demanding environments such as barcode labels requiring chemical resistance and medical examination processes requiring solvent resistance.
3Reliability
If perfluoropolyether adhesive composition is used, then chemical resistance and solvent resistance are improved, but adhesion becomes too low for general applications
Solution Approach 1:
The invention formulates a composite adhesive system combining perfluoropolyether compound (A) with organosilicon compound (B) and hydrosilylation-reaction catalyst (C). This composite approach achieves the desired low adhesion property while maintaining heat resistance and chemical resistance that single materials cannot provide.
Solution Approach 2:
The invention precisely controls the composition parameters including the use of perfluoropolyether structure containing repeating unit —CaF2aO— and specifies the components with at least two alkenyl groups per molecule and at least two silicon-bonded hydrogen atoms per molecule to achieve the optimal balance of properties.
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 low adhesion, preventing substrate damage while providing superior chemical and solvent resistance, making it suitable for applications requiring gentle detachment from fragile substrates.
Implementation Method 1
a curable perfluoropolyether adhesive composition comprising the following components (A) to (C): (A) 100 parts by mass of a linear perfluoropolyether compound having at least two alkenyl groups per molecule... (B) an effective curing amount of an organosilicon compound having at least two silicon-bonded hydrogen atoms per molecule... (C) a catalytic amount of a hydrosiylation-reaction catalyst
Data Source
AI summary
A curable perfluoropolyether adhesive composition containing the following components (A) to (C): (A) 100 parts by mass of a linear perfluoropolyether compound having at least two alkenyl groups per molecule and having a perfluoropolyether structure containing a repeating unit represented by —CaF2aO— in a main chain, “a” being an integer of 1 to 6; (B) an effective curing amount of an organosilicon compound having at least two silicon-bonded hydrogen atoms per molecule; and (C) a catalytic amount of a hydrosilylation-reaction catalyst, where a cured product of the curable perfluoropolyether adhesive composition is an adhesive having adhesion of less than 0.5 N/25 mm.