Curable Resin Composition for Metal Adhesion and Coolant Resistance
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Solution Overview
Problem
Existing curable resin compositions struggle to achieve high adhesiveness to metals while maintaining resistance to coolants, particularly when fillers or color powders are present, leading to incomplete curing and loss of sealant function.
Innovation Solution
A curable resin composition comprising a polymer with a (meth)acrylic monomer backbone and hydrolyzable silyl groups, an organozinc catalyst, and a silane-based coupling agent with an epoxy group, which facilitates crosslinking and enhances adhesion and coolant resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a photocurable composition contains a filler or color powder, then the composition can achieve high resistance to antifreeze liquid, but light energy cannot reach the interior of the composition and the interior remains uncured
Solution Approach 1:
The patent replaces the photocurable system (light energy activation) with a chemically curable system using organozinc catalyst and silane-based coupling agents. This substitution eliminates the dependency on light penetration, allowing complete curing even when fillers or color powders are present in the composition.
Solution Approach 2:
The patent changes the curing mechanism from photochemical activation to chemical catalysis. By using organozinc catalyst and silane-based coupling agents, the curing process becomes independent of light energy, enabling complete reaction throughout the composition including interior regions blocked from light.
2Reliability
If a curable resin composition achieves high resistance to coolant, then the cured product has good chemical stability, but adhesion to metal adherends is insufficient
Solution Approach 1:
The patent creates a composite curing system combining organozinc catalyst with silane-based coupling agents having epoxy groups. This composite approach enables simultaneous achievement of coolant resistance through the resin matrix and strong metal adhesion through the silane coupling agents that form chemical bonds with metal surfaces.
Solution Approach 2:
The silane-based coupling agent acts as an intermediary between the resin matrix and metal substrate. It provides both chemical compatibility with the coolant-resistant resin and strong bonding capability to metal surfaces, thereby bridging the contradiction between chemical stability and adhesion.
3Device complexity
If a curable resin composition uses conventional components, then the formulation is simple, but the cured product lacks both high adhesiveness to metal and high coolant resistance
Solution Approach 1:
The organozinc catalyst and silane-based coupling agents serve multiple functions: they catalyze the curing reaction, provide metal adhesion through silane-metals bonding, and contribute to coolant resistance through the crosslinked network formation. This multi-functionality achieves combined performance without requiring separate additives for each function.
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 a cured product with high adhesiveness to metals and resistance to coolants, ensuring complete curing and maintaining sealant functionality even with fillers or color powders.
Implementation Method 1
a polymer which has, as a main chain, a polymer of a monomer containing a (meth)acrylic monomer and which has a hydrolyzable silyl group in its molecule
Implementation Method 2
a silane-based coupling agent having an epoxy group
Implementation Method 3
an organozinc catalyst
Implementation Method 4
a silane-based coupling agent having an epoxy group
Data Source
AI summary
A means which allows a cured product having high adhesiveness to at least one metal and high resistance to a coolant to be obtained is provided. A curable resin composition containing components (A) to (C): component (A): a polymer which has, as a main chain, a polymer of a monomer containing a (meth)acrylic monomer and which has a hydrolyzable silyl group in its molecule, component (B): an organozinc catalyst, and component (C): a silane-based coupling agent having an epoxy group.