Antistatic Release Agent Using Conductive Polymer Complex
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Solution Overview
Problem
Existing antistatic release agents for base materials, particularly those using silicone-based release agents, face issues with stability and effectiveness due to humidity-dependent conductivity and bleeding, as well as storage stability problems with thiophene-based polymers, which affect the antistatic and release properties of coated films.
Innovation Solution
An antistatic release agent comprising an aqueous solution of a π-conjugated electrically conductive polymer complex with a polyanion and an alkaline compound, combined with a silicone emulsion, where the alkaline compound content is 0.7 times or more relative to the neutralization equivalent of the polymer complex and the pH is 10 or lower, enhancing storage stability and antistatic properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ionic conductive compounds such as surfactants are used as antistatic agents, then antistatic properties are imparted to release base materials, but the conductivity is dependent on humidity causing unstable antistatic properties and bleeding out from the base material
Solution Approach 1:
The patent changes the fundamental parameter of conductivity mechanism from ionic conduction (humidity-dependent) to electronic conduction via π-conjugated polymers (humidity-independent). This parameter change resolves the contradiction by providing stable antistatic properties that do not fluctuate with humidity while preventing bleeding out.
Solution Approach 2:
The patent uses composite materials by combining π-conjugated electrically conductive polymers with silicone-based release agents. This composite approach allows the conductive polymer to provide stable antistatic properties while the silicone matrix prevents bleeding out and maintains release functionality.
2Reliability
If π-conjugated electrically conductive polymers are used as antistatic agents, then humidity-independent conductivity and no bleeding out are achieved, but the polymers are insoluble and infusible making them difficult to apply to coating or extrusion lamination
Solution Approach 1:
The patent uses polyanions as intermediary substances that form soluble complexes with the insoluble π-conjugated polymers. This intermediary approach allows the conductive polymers to be processed in aqueous solutions for coating applications while maintaining their inherent stable antistatic properties.
Solution Approach 2:
The patent changes the solubility parameter of π-conjugated polymers by forming complexes with polyanions. This parameter change transforms the insoluble polymers into soluble or dispersible forms that can be applied via coating or extrusion lamination while retaining their electrical conductivity and stable antistatic properties.
3Reliability
If a release agent containing thiophene-based electrically conductive polymer is used, then antistatic properties are provided, but the aqueous solution has low storage stability and gels in 2 to 3 days making it unusable
Solution Approach 1:
The patent optimizes the pH parameter of the aqueous solution to maintain stability. By controlling pH within a specific range and using appropriate polyanions, the patent prevents gelation and maintains storage stability for extended periods while preserving the antistatic properties of the thiophene-based conductive polymer.
Solution Approach 2:
The patent uses polyanions as intermediary agents that form stable complexes with thiophene-based polymers in aqueous solutions. This complexation prevents unwanted gelation reactions while maintaining the electrical conductivity and antistatic properties, thereby extending storage stability.
4Ease of operation
If silicone-based release agents are coated onto base materials, then release properties are provided, but the base materials become easily charged and more easily charged when coated with the release agent
Solution Approach 1:
The patent merges two previously separate functions into a single integrated coating: the silicone-based release agent provides release properties while the π-conjugated conductive polymer provides antistatic properties. This merging eliminates the need for separate coatings and ensures both functions work together without interference.
Solution Approach 2:
The patent creates a composite release coating by combining silicone-based release agents with π-conjugated electrically conductive polymers. This composite material simultaneously provides excellent release properties and stable antistatic properties, resolving the contradiction between release functionality and charge accumulation.
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 storage stability and maintains effective antistatic and release properties, preventing contamination and precipitation, thus ensuring stable coating and improved performance of the antistatic release coated film and base material.
Implementation Method 1
π-conjugated electrically conductive polymers are substances that are insoluble and infusible
Implementation Method 2
electrically conductive polymer complex composed of a π-conjugated electrically conductive polymer and a polyanion having an anionic group in a molecule thereof
Implementation Method 3
the content of the alkaline compound is 0.7 times or more relative to the number of moles of the neutralization equivalent of the electrically conductive polymer complex, and the pH at 25° C. is 10 or lower
Implementation Method 4
a silicone emulsion and a dispersion medium
Data Source
AI summary
The present invention relates to an antistatic release agent comprising an aqueous solution of an electrically conductive polymer complex composed of a π-conjugated electrically conductive polymer and a polyanion having an anionic group in a molecule thereof, an alkaline compound, a silicone emulsion and a dispersion medium, wherein the alkaline compound is at least one type of compound selected from the group consisting of an inorganic alkali, as amine compound and a nitrogen-containing aromatic cyclic compound, the content of the alkaline compound in the antistatic release agent is 0.7 times or more relative to the number of moles of the neutralization equivalent of the electrically conductive polymer complex, and the pH of the antistatic release agent at 25° C. is 10 or lower. The present invention can provide an antistatic release agent having superior storage stability for forming an antistatic release coated film.