Curable Composition with Branched Polyolefin for Moisture Resistance
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Solution Overview
Problem
The existing curable compositions that cure by light irradiation lack sufficient moisture resistance, as the curing reaction between the low molecular isocyanate compound and (meth)acrylate monomer does not occur, leading to incomplete curing and reduced electrical insulation in unirradiated areas.
Innovation Solution
A curable composition incorporating a branched polyolefin structure with (meth)acryloyl and isocyanate groups, combined with an alicyclic (meth)acrylate monomer, which can polymerize upon light exposure and react with moisture, ensuring comprehensive curing and enhanced moisture resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a low molecular isocyanate compound is used in the curable composition, then the composition can be cured by light irradiation, but the curing reaction does not proceed between the isocyanate compound and (meth)acrylate monomer, resulting in insufficient curing and reduced moisture resistance
Solution Approach 1:
The patent combines the isocyanate group and (meth)acryloyl group into a single curable compound molecule, enabling both light-cured polymerization and moisture-cured polyaddition reactions to proceed simultaneously. This merging of functional groups within one molecule resolves the contradiction by ensuring complete curing while maintaining a relatively simple composition structure.
Solution Approach 2:
The curable compound is designed to perform multiple functions: it can undergo both photopolymerization (light-cured) and polyaddition (moisture-cured) reactions. This multi-functionality allows the single compound to address both curing pathways, ensuring complete curing in all regions including unirradiated areas, thereby improving moisture resistance without complicating the overall composition.
2Reliability
If only light irradiation is used for curing, then the curing process is simple and fast, but the cured film has insufficient moisture resistance due to incomplete curing in unirradiated portions
Solution Approach 1:
The curable compound enables continuous curing action through dual mechanisms: light irradiation provides immediate polymerization, while moisture-cured polyaddition continues the curing process in unirradiated areas. This continuity ensures complete curing throughout the film, improving electrical insulation while maintaining efficient curing productivity through the combined reactions.
3Reliability
If the curable composition lacks proper curing in unirradiated areas, then the composition structure remains simple, but the cured film exhibits reduced electrical insulation and insufficient moisture resistance
Solution Approach 1:
By integrating both isocyanate and (meth)acryloyl groups into one curable compound, the patent achieves complete curing in unirradiated areas without significantly complicating the composition structure. The merged molecular design allows both curing mechanisms to operate within a single compound framework, improving moisture resistance and electrical insulation while maintaining ease of manufacture.
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 complete curing both by light and moisture, resulting in improved moisture resistance and electrical insulation of the cured film, addressing the insufficiencies of previous technologies.
Implementation Method 1
a curable composition that includes a (meth)acrylate monomer having, in the molecule, a (meth)acryloyl group polymerized by being irradiated with ultraviolet rays
Implementation Method 2
the isocyanate groups of the low molecular isocyanate compound react with each other by moisture in air to allow polymerization to proceed
Data Source
AI summary
Provided is, for example, a curable composition including: a curable compound having, in a molecule, a branched polyolefin structure, a (meth)acryloyl group, and an isocyanate group; and an alicyclic (meth)acrylate monomer having, in a molecule, a cycloalkyl structure and a (meth)acryloyl group.