Curable Composition for Electronic Circuits

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Solution Overview

Problem

The existing curable composition for electronic circuits has insufficient elongation properties, leading to a risk of cracking under temperature fluctuations, compromising both electrical insulation and durability.

Innovation Solution

A curable composition incorporating a branched polyolefin structure, saturated cycloalkyl(meth)acrylate monomers, and saturated chain alkyl(meth)acrylate monomers, along with an isocyanate monomer, which can be cured by light and moisture, enhancing both electrical insulation and elongation properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a curable composition uses conventional urethane resin with hydrogenated butadiene-based skeleton and monofunctional (meth)acrylate monomer, then electrical insulation properties are achieved, but elongation properties are insufficient

Engineering Contradiction:

Improveelectrical insulation propertiesVSAvoidelongation properties

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The patent uses a composite resin system combining polyurethane resin with specific (meth)acrylate monomers (cycloalkyl and chain alkyl types) to achieve both electrical insulation and elongation properties. The composite structure allows the material to maintain electrical properties while gaining mechanical flexibility and elongation capability through the synergistic effect of different polymer components.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The patent modifies the chemical composition parameters by specifying precise ratios of (meth)acrylate monomers (cycloalkyl type: 40-80 parts, chain alkyl type: 20-60 parts) relative to the polyurethane resin. This parameter optimization enables the cured product to achieve both good electrical insulation and sufficient elongation properties simultaneously.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If the cured product has good electrical insulation, then it can be used in electronic circuits, but it is prone to cracking under temperature fluctuations

Engineering Contradiction:

Improveelectrical insulationVSAvoidcracking under temperature fluctuations

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent adjusts the chemical composition parameters by incorporating specific (meth)acrylate monomers in controlled amounts, which changes the thermal and mechanical properties of the cured product. This parameter modification enables the material to maintain electrical insulation while improving resistance to thermal stress and cracking.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The composite resin system combines polyurethane with (meth)acrylate monomers to create a material that has both electrical insulation properties and thermal stability. The composite structure provides a balance between electrical performance and resistance to thermal-induced cracking.

Inventive Principle:

Principle #40Composite materials

3Reliability

If the curable composition is cured by both light and moisture, then complete curing is achieved, but the formulation complexity increases

Engineering Contradiction:

Improvecuring completenessVSAvoidformulation complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs a multi-functional curing system where the same curable composition can be cured by both light (photopolymerization) and moisture (polymerization). This universal curing capability allows complete curing under different environmental conditions without requiring separate formulation systems, thereby achieving reliable curing while managing formulation complexity through a unified approach.

Inventive Principle:

Principle #6Universality (Multi-functionality)

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 improved elongation properties and electrical insulation, providing better thermal stability and reliability against temperature fluctuations.

Implementation Method 1

the monofunctional (meth)acrylate monomers described above react with each other by the irradiation with light such as ultraviolet rays to be polymerized

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Implementation Method 2

the isocyanate groups of the urethane resin react with each other by moisture in air to allow polymerization to proceed

Methodology Applied

Scientific EffectPolymerization:

Data Source

PatentUS12116432B2Curable composition

Publication Date: 2024.10.15 NITTO SHINKO KK

AI summary

Provided is a curable composition including: a curable oligomer having, in its molecule, a branched polyolefin structure and a (meth)acryloyl group; a saturated cycloalkyl (meth)acrylate monomer having, in its molecule, a saturated cyclic hydrocarbon structure and a (meth)acryloyl group; and a saturated chain alkyl (meth)acrylate monomer having, in its molecule, a saturated chain hydrocarbon structure and a (meth)acryloyl group.