Antistatic Release Film Using Ionic Liquid Mediator

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Solution Overview

Problem

Existing antistatic release films face challenges with unstable antistatic properties due to humidity dependence and compatibility issues between silicone-based release agents and π-conjugated electrically conductive polymers, leading to separation and inadequate release properties.

Innovation Solution

A condensation-curing type organopolysiloxane-based antistatic release agent is developed, incorporating a complex of π-conjugated electrically conductive polymer and polyanion, with an amine-type compound coordinated to the polyanion to enhance compatibility and stability, forming a uniform dispersion for improved antistatic and release properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If an aqueous dispersion containing a π-conjugated electrically conductive polymer and a polyanion is used, then antistatic properties are achieved, but compatibility with silicone-based release agent is poor leading to separation

Engineering Contradiction:

Improveantistatic propertiesVSAvoidcompatibility between conductive polymer complex and silicone release agent

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

A choline chloride-based ionic liquid is introduced as an intermediary substance that bridges the aqueous conductive polymer dispersion and the silicone-based release agent. The ionic liquid contains both hydrophilic (quaternary ammonium) and hydrophobic (alkyl chain) groups, allowing it to interact with both phases and stabilize the mixture, preventing separation while maintaining antistatic properties.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The invention changes the chemical composition parameters of the dispersion system by replacing part of the aqueous phase with an ionic liquid. This parameter change modifies the interfacial properties and compatibility between the conductive polymer complex and silicone release agent, enabling stable mixing without phase separation.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If emulsion-type silicone is used, then release properties are improved, but adhesion to substrate is low and corrosion of coating machine occurs due to high water content

Engineering Contradiction:

Improverelease propertiesVSAvoidcorrosion and low adhesion

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The invention modifies the composition parameters of the silicone release agent by incorporating a choline chloride-based ionic liquid. This ionic liquid reduces the overall water content and hydrophilicity of the system, thereby improving adhesion to substrates and reducing corrosion of coating equipment while preserving the release properties provided by the silicone component.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If ionic conductive compounds such as surfactants are used, then antistatic properties are achieved, but conductivity is dependent on humidity and bleed-out occurs

Engineering Contradiction:

Improveantistatic propertiesVSAvoidhumidity dependence and bleed-out

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The invention creates a composite system combining a π-conjugated electrically conductive polymer with a polyanion and a choline chloride-based ionic liquid. This composite material provides antistatic properties through the conductive polymer network, which is inherently less dependent on humidity compared to ionic surfactants, while the ionic liquid ensures stable dispersion and prevents bleed-out.

Inventive Principle:

Principle #40Composite materials

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 superior antistatic and release properties with enhanced compatibility and stability, ensuring effective performance in various applications, including optical and electronic components.

Implementation Method 1

at least one amine-type compound selected from the group consisting of a secondary amine, a tertiary amine or a quaternary ammonium salt is coordinated to or bonded to portion of anion groups in the polyanion as an ion pair

Methodology Applied

Scientific EffectIon pair coordination: Ion Repulsion/Attraction

Implementation Method 2

a release component that contains a condensation-curing type organopolysiloxane

Methodology Applied

Scientific EffectCondensation reaction: Condensation

Data Source

PatentEP2894207B1Antistatic release agent and antistatic release film

Publication Date: 2022.03.23 SHIN ETSU POLYMER CO LTD

AI summary

The invention relates to an antistatic release agent comprising: a release component that contains a condensation-curing type organopolysiloxane, a conductive component that contains a complex of a π-conjugated electrically conductive polymer and a polyanion and an organic solvent, wherein the amount of the conductive component relative to 100 parts by mass of the release component is 1 to 300 parts by mass, at least one amine-type compound selected from the group consisting of a secondary amine, a tertiary amine or a quaternary ammonium salt is coordinated to or bonded to portion of anion groups in the polyanion as an ion pair, and the amine-type compound has one or more substituent selected from the group consisting of an alkyl group having 4 or more carbon atoms, an aryl group, an aralkyl group, an alkylene group, an arylene group, an aralkylene group and an oxyalkylene group.