Photocurable Resin Composition for Window Member Adhesion

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Existing window members for display panels face issues with adhesive property degradation and physical property deterioration under high temperature, high humidity, and thermal shock conditions, especially when subjected to additional UV irradiation.

Innovation Solution

A photocurable resin composition comprising (meth)acrylic resin, urethane acrylate oligomer, and photopolymerizable monomers, which forms a resin layer with improved adhesive properties and weatherability, including a specific ratio of monofunctional, bifunctional, and polyfunctional (meth)acrylic monomers, and a photopolymerization initiator, applied using UV curing to create a durable molding layer for window members.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a conventional ultraviolet curable molding layer is used to add design to the window member, then the optical function and design are improved, but the adhesive property deteriorates under high temperature and high humidity conditions

Engineering Contradiction:

Improvedesign capabilityVSAvoidadhesive property

Core Design Contradiction:

Ease of manufactureVSReliability

Solution Approach 1:

The patent modifies the chemical composition parameters of the photocurable resin by incorporating specific ratios of monofunctional, bifunctional, and polyfunctional (meth)acrylic monomers, along with urethane acrylate oligomer and photopolymerization initiator. This compositional parameter change enables the resin to maintain both design capability and adhesive stability under high temperature and humidity conditions, resolving the contradiction between ease of manufacture and reliability.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite photocurable resin system by combining multiple components: (meth)acrylic resin, monofunctional/multifunctional (meth)acrylic monomers, urethane acrylate oligomer, and photopolymerization initiator. This composite material approach allows the molding layer to simultaneously achieve good adhesion, weatherability, and resistance to thermal shock, while maintaining design flexibility.

Inventive Principle:

Principle #40Composite materials

2Duration of action of stationary object

If additional UV irradiation is applied in subsequent processes, then the curing is improved, but the molding layer develops cracks and adhesion decreases

Engineering Contradiction:

Improvecuring completenessVSAvoidstructural integrity

Core Design Contradiction:

Duration of action of stationary objectVSStrength

Solution Approach 1:

The patent formulates the photocurable resin with a balanced composition of photopolymerizable monomers and photopolymerization initiator that enables complete curing at controlled UV exposure levels. The specific ratio of monofunctional, bifunctional, and polyfunctional monomers ensures that the resin cures adequately without requiring excessive UV irradiation, thereby preventing crack formation and adhesion loss while still achieving complete curing.

Inventive Principle:

Principle #16Partial or excessive action

3Adaptability or versatility

If the window member is exposed to thermal shock conditions, then the environmental durability is tested, but the physical properties such as adhesion and cracking resistance deteriorate

Engineering Contradiction:

Improveenvironmental resistanceVSAvoidphysical property stability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent adjusts the glass transition temperature and molecular weight parameters of the (meth)acrylic resin component to optimize thermal stability. By selecting specific resin parameters and combining them with urethane acrylate oligomer and controlled monomer ratios, the molding layer achieves resistance to thermal shock while maintaining adhesion and preventing cracks under environmentally stressful conditions.

Inventive Principle:

Principle #35Parameter changes

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 solution provides a window member with enhanced adhesive properties and resistance to cracking, peeling, and physical property degradation under high temperature, high humidity, and thermal shock conditions, ensuring durability and reliability.

Implementation Method 1

a photopolymerizable monomer... and a photopolymerization initiator... applied using UV curing to create a durable molding layer

Methodology Applied

Scientific EffectPhotopolymerization: Photopolymerisation

Data Source

PatentUS11427669B2Photocurable resin composition and fabrication method of window member using the same

Publication Date: 2022.08.30 SAMSUNG DISPLAY CO LTD

AI summary

Provided are a photocurable resin composition and fabrication method of window member using the same. The photocurable resin composition includes a (meth)acrylic resin, a urethane acrylate oligomer, a photopolymerizable monomer and a photopolymerization initiator. Accordingly, deterioration in physical properties such as cracking or decrease of adhesion under additional ultraviolet irradiation conditions, high temperature and high humidity conditions, and thermal shock conditions does not occur.