Curable Perfluoropolyether Adhesive Composition for Resin and Metal Bonding
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Solution Overview
Problem
Conventional adhesives, particularly silicone-based ones, lack sufficient chemical and solvent resistance for applications in barcode labels and industrial processes, and require a primer for bonding to rigid substrates like resin or metal, which complicates the application process.
Innovation Solution
A curable perfluoropolyether adhesive composition comprising a linear perfluoropolyether compound with alkenyl groups, an organosilicon compound with silicon-bonded hydrogen atoms, a hydrosilylation-reaction catalyst, and an organosilicon compound with epoxy and trialkoxysilyl groups, which forms a cured product with enhanced heat resistance, chemical resistance, and adhesive strength to resin and metal substrates without the need for a primer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional silicone adhesives are used, then heat resistance and weatherability are improved, but chemical resistance and solvent resistance are insufficient
Solution Approach 1:
The patent uses a composite adhesive system combining perfluoropolyether compound (providing chemical and solvent resistance) with organosilicon compound (providing heat resistance and weatherability). This composite approach allows the adhesive to simultaneously achieve superior heat resistance, chemical resistance, and solvent resistance that neither material could provide alone.
2Reliability
If perfluoropolyether adhesive composition is used to achieve excellent chemical resistance and solvent resistance, then adhesive force to resin and metal substrates deteriorates without primer application
Solution Approach 1:
The organosilicon compound acts as an intermediary that bridges the perfluoropolyether compound and the substrate surface. It provides silane coupling agents that chemically bond to both the perfluoropolyether matrix and the substrate (resin or metal), enabling strong adhesion without requiring separate primer applications while maintaining excellent chemical and solvent resistance.
Solution Approach 2:
The patent modifies the chemical composition parameters by incorporating specific ratios of perfluoropolyether compound, organosilicon compound, and crosslinking agents. This parameter optimization allows the adhesive to achieve both high chemical resistance and strong substrate adhesion through controlled chemical bonding mechanisms.
3Ease of manufacture
If perfluoropolyether adhesive composition is applied to rigid substrates without primer, then application process complexity is reduced, but adhesive strength to substrates deteriorates
Solution Approach 1:
The organosilicon compound serves as a built-in intermediary that provides substrate bonding capability directly within the adhesive composition. This eliminates the need for separate primer applications while maintaining strong adhesive force to resin and metal substrates, thereby simplifying the overall application process without sacrificing bond 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 provides a cured adhesive with superior heat resistance, chemical resistance, and solvent resistance, along with strong adhesion to various substrates, eliminating the need for a primer and improving the durability of adhesive films in demanding environments.
Implementation Method 1
a curable perfluoropolyether adhesive composition comprising: a linear perfluoropolyether compound having at least two alkenyl groups per molecule... an organosilicon compound having two or more H—SiOSiO structures per molecule... and a hydrosilylation-reaction catalyst
Data Source
AI summary
A curable perfluoropolyether adhesive composition containing: (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; (B) an organosilicon compound having at least two silicon-bonded hydrogen atoms per molecule; (C) a hydrosilylation-reaction catalyst; (D) 0.05 to 5 parts by mass of an organosilicon compound, other than the component (B), having per molecule any two or more selected from a silicon-bonded hydrogen atom, an epoxy group bonded to a silicon atom via a carbon atom or via a carbon atom and an oxygen atom, and a trialkoxysilyl group bonded to a silicon atom via a carbon atom or via a carbon atom and an oxygen atom.