Undercoat Agent Resin for Phase Separation Control
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Solution Overview
Problem
The existing undercoat agents for forming phase-separated structures have a limited baking temperature margin, making it difficult to control the surface state of the undercoat agent layer and leading to defective phase separation, especially requiring high-temperature baking above 200°C.
Innovation Solution
An undercoat agent comprising a resin component with specific constitutional units, allowing for a larger baking temperature margin and enabling the formation of a film at lower temperatures, which enhances the control of the surface state and phase separation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional undercoat agents are used, then phase separation can be achieved, but the baking temperature margin is small and high-temperature baking above 200°C is required
Solution Approach 1:
The invention modifies the chemical composition parameters of the undercoat agent by incorporating specific resin components with hydroxyl groups and controlling the content of aromatic constitutional units. This parameter change enables the system to achieve optimal phase separation at lower baking temperatures (150-200°C) while maintaining reliability, resolving the contradiction between temperature reduction and phase separation quality.
Solution Approach 2:
The invention creates a composite undercoat agent system combining multiple resin components (polyester resin, polyacrylic resin, or vinyl resin) with specific functional groups. This composite material approach provides both the thermal stability needed for reliable phase separation and the chemical properties that enable lower baking temperatures, thus resolving the contradiction between temperature and reliability.
2Reliability
If high-temperature baking is performed, then phase separation can be achieved, but the surface state control of the undercoat agent layer becomes difficult
Solution Approach 1:
By changing the chemical composition parameters of the undercoat agent—specifically incorporating resin components with hydroxyl groups and controlling aromatic constitutional unit content to 70-95%—the invention enables surface state control at lower temperatures, resolving the contradiction between achieving reliable phase separation and maintaining manufacturing precision for surface state control.
3Stability of the object's composition
If the undercoat agent layer is formed with conventional compositions, then film formation can be achieved, but the surface cannot be sufficiently controlled to be hydrophobic
Solution Approach 1:
The invention changes the compositional parameters by incorporating resin components with hydroxyl groups and controlling aromatic constitutional unit content. This enables sufficient hydrophobicity control at lower baking temperatures, resolving the contradiction between achieving stable hydrophobic surface composition and reducing baking temperature.
Solution Approach 2:
The invention substitutes chemical composition design for thermal energy input. Instead of relying on high temperature (mechanical/thermal system) to achieve hydrophobicity, the invention uses chemically active resin components with hydroxyl groups that provide the necessary surface properties at lower temperatures, resolving the contradiction between hydrophobicity control and temperature reduction.
4Temperature
If a large baking temperature margin is desired, then low-temperature baking is preferred, but conventional undercoat agents cannot achieve sufficient surface control
Solution Approach 1:
The invention changes the chemical composition parameters of the undercoat agent by incorporating resin components with hydroxyl groups and controlling aromatic constitutional unit content. This parameter change enables both low-temperature baking (providing large temperature margin) and sufficient surface state control, simultaneously resolving both requirements.
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 broader baking temperature range, allowing for stable control of the undercoat agent layer's surface state, improving phase separation performance and enabling phase-separated structure formation at lower temperatures, thus enhancing the adhesiveness and hydrophobicity of the layer.
Implementation Method 1
a technology for forming a finer structure by utilizing a phase-separated structure formed by self-organization of a block copolymer in which blocks incompatible to each other are bonded together
Implementation Method 2
it is necessary to control the surface free energy of an undercoat agent layer
Implementation Method 3
the margin of the baking temperature at the time of forming an undercoat agent layer is small
Data Source
AI summary
An undercoat agent that is used for subjecting a layer including a block copolymer to phase separation on a substrate, the undercoat agent containing a resin component (A1) having a constitutional unit (u1) represented by General Formula (u1) and a constitutional unit (u2) represented by General Formula (u2). In General Formula (u1), R11 represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogenated alkyl group having 1 to 5 carbon atoms, R12 represents a substituent, and n represents an integer of 0 to 5. In General Formula (u2), R2 represents a hydrogen atom, an alkyl group having 1 to 5 carbon atoms, or a halogenated alkyl group having 1 to 5 carbon atoms, L2 represents a single bond or a divalent linking group, and Y2 represents a divalent linking group having 5 to 15 carbon atoms