Acrylic Pressure Sensitive Adhesive Antistatic Composition

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Solution Overview

Problem

Acrylic pressure sensitive adhesive compositions used in LCD production face challenges in preventing static electricity, which affects liquid crystal orientation, and existing solutions either compromise durability or transparency, or are difficult to implement industrially.

Innovation Solution

Incorporating ester plasticizers with ether bonds and alkali metallic salts into the acrylic pressure sensitive adhesive composition to enhance ionic conductivity and maintain durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conductive components or carbon particles are added to pressure sensitive adhesive to prevent static electricity, then antistatic property is improved, but transparency deteriorates

Engineering Contradiction:

Improveantistatic propertyVSAvoidtransparency

Core Design Contradiction:

ReliabilityVSIllumination intensity

Solution Approach 1:

The invention changes the chemical composition parameters by introducing ester plasticizers with specific ether bonds and alkali metallic salts, which fundamentally alter the electrical conductivity mechanism without affecting optical properties. This compositional parameter change enables antistatic function while preserving transparency

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The invention creates a composite adhesive system combining ester plasticizer and alkali metallic salt components that work synergistically to generate ionic conductivity. This composite approach achieves antistatic property through ionic mechanisms rather than electronic conduction, thereby maintaining transparency

Inventive Principle:

Principle #40Composite materials

2Reliability

If surfactants are added to pressure sensitive adhesive to prevent static electricity, then antistatic property is improved, but adhesive property deteriorates

Engineering Contradiction:

Improveantistatic propertyVSAvoidadhesive property

Core Design Contradiction:

ReliabilityVSStrength

Solution Approach 1:

The invention changes the chemical composition by using ester plasticizers with ether bonds and alkali metallic salts instead of surfactants. This parameter change achieves antistatic property through ionic conduction without the surface-transiting behavior that degrades adhesive performance

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The ester plasticizer acts as an intermediary substance that provides ionic conductivity through its ether bonds and alkali metallic salt interaction, preventing direct contact between conductive pathways and the adhesive interface, thereby preserving adhesive strength

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If polyether polyol compound and alkali metallic salt are mixed to prevent static electricity, then antistatic property is improved, but manufacturing complexity increases

Engineering Contradiction:

Improveantistatic propertyVSAvoidmanufacturing process

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The invention merges the functions of polyether polyol compound and alkali metallic salt into a single ester plasticizer component containing ether bonds. This consolidation eliminates the need for separate mixing steps and crosslinking sequence control, simplifying the manufacturing process while maintaining antistatic efficacy

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The ester plasticizer serves multiple functions simultaneously: it provides flexibility to the adhesive, generates ionic conductivity through ether bonds, and eliminates the need for complex crosslinking sequences. This multi-functionality reduces manufacturing complexity

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 solution effectively inhibits static electricity generation without compromising the adhesive's durability or transparency, ensuring reliable performance in LCD production.

Implementation Method 1

incorporating ester plasticizers with ether bonds and alkali metallic salts into the acrylic pressure sensitive adhesive composition to enhance ionic conductivity

Methodology Applied

Scientific EffectIonic conductivity: Conduction (electrical)

Data Source

PatentUS7767752B2Acrylic pressure sensitive adhesive having antistatic property

Publication Date: 2010.08.03 LG CHEM LTD

AI summary

The present invention relates to an acrylic pressure sensitive adhesive composition for the production of a polarizer, which has excellency in major characteristics including durability and antistatic property, more precisely, an acrylic pressure sensitive adhesive composition containing ester plasticizer having one or more ether bonds and alkali metallic salt, a polarizer applied with the pressure sensitive adhesive and liquid crystal display (LCD) device using the same. The acrylic pressure sensitive adhesive composition for the production of a polarizer of the present invention has excellent pressure sensitive adhesive functions and durability.