Acrylic Pressure Sensitive Adhesive Anti-Static Composition
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Solution Overview
Problem
Conventional pressure sensitive adhesives fail to effectively prevent static electricity in the production of liquid crystal displays without compromising durability, transparency, or adhesion, especially under high temperature and humidity conditions.
Innovation Solution
An acrylic pressure sensitive adhesive composition incorporating ester plasticizers with ether linkages and metal salts with perfluoro alkyl groups, which provide excellent anti-static properties while maintaining transparency and adhesion, is developed. This composition includes 100 parts of acrylic copolymers, 0.01 to 20 parts of ester plasticizers, and 0.001 to 25 parts of metal salts with alkali metal cations and super strong acid anions, forming a complex that enhances ion conductivity and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conductive metal powder or carbon particle is added to provide anti-static function, then static electricity prevention is improved, but transparency of the pressure sensitive adhesive layer is decreased
Solution Approach 1:
The invention changes the chemical composition parameters by using ester plasticizers with specific ether linkages and metal salts with perfluoro alkyl groups, achieving effective anti-static properties through ionic conduction rather than particulate conduction, thus maintaining transparency
Solution Approach 2:
The invention creates a composite system combining ester plasticizers and metal salts that work synergistically to provide anti-static function through ion conduction, avoiding the use of opaque conductive particles while achieving reliable static electricity prevention
2Reliability
If surfactant type ionic material is added to provide anti-static function, then static electricity prevention is improved, but adhesive property is decreased due to migration to surface
Solution Approach 1:
The ester plasticizer acts as an intermediary carrier that holds metal salts in a dissolved state within the adhesive matrix, preventing direct migration of ionic materials to the surface while still providing anti-static function through controlled ion conduction
Solution Approach 2:
The invention changes the physical state parameter of metal salts from migrated crystalline form to dissolved ionic form, controlled by the ester plasticizer, thereby preventing surface migration that would compromise adhesive properties
3Reliability
If polyether polyol compounds and alkali metal salts are mixed to provide anti-static property, then static electricity prevention is improved, but degree of crosslinking is affected
Solution Approach 1:
The invention changes the chemical structure parameter by using ester plasticizers with ether linkages instead of polyether polyol compounds, and selects metal salts with perfluoro alkyl groups that have appropriate solubility and compatibility, achieving anti-static function without interfering with the crosslinking reaction parameters
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 prevents static electricity, maintains transparency and adhesion, and ensures durability under high temperature and humidity conditions, outperforming comparative examples in stability and surface resistance tests.
Implementation Method 1
mixing polyether polyol compounds and one or more alkali metal salts... making crosslinking first by using isocyanate crosslinking agent, and then dissolved the composition again before mixing process of the polyether polyol compound and the alkali metallic salt
Implementation Method 2
ester plasticizer having at least one ether linkage in the molecular structure... and metal salts consisting of alkali metal cation, and anion which is counter-ion of super strong acid
Data Source
AI summary
The present invention relates to an acrylic pressure sensitive adhesive composition, specifically, an acrylic pressure sensitive adhesive composition having improved anti-static properties, comprising 100 part by weight of acrylic copolymers, 0.01 to 20 part by weight of ester plasticizer having at least one ether linkage in the molecular structure, and 0.001 to 25 part by weight of metal salts consisting of alkali metal cation, and anion which is counter-ion of super strong acid and has perfluoro alkyl group, and prevent whitening of appearance under high temperature and humidity condition as well as static electricity without change of the durability, transparency, and adhesion.