Polymerizable Compound for Uniform Polarized Light Conversion
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Solution Overview
Problem
Existing retardation films struggle to achieve uniform conversion of polarized light over a wide wavelength band due to wavelength dispersion, and current polymerizable compounds have issues with high melting points, low solubility, and high production costs, making them unsuitable for industrial applications.
Innovation Solution
A polymerizable compound represented by a specific formula, which can be polymerized to form a polymer that is used in a polymerizable composition, resulting in an optically anisotropic article that achieves uniform polarized light conversion across a wide wavelength band at a lower cost and with improved solubility and melting point characteristics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If existing low-molecular-weight polymerizable compounds are used to reduce retardation film thickness, then film thickness is reduced, but reverse wavelength dispersion is insufficient and production cost increases due to multi-step synthesis using expensive reagents
Solution Approach 1:
The invention modifies the molecular structure of polymerizable compounds by introducing specific chemical groups ( Formula I structure with R1-R6, G1-G2, Z1-Z2, Ax, A1-A3, and Q1 parameters) to achieve reverse wavelength dispersion while maintaining low melting points and high solubility, thereby reducing production cost and simplifying manufacturing
Solution Approach 2:
The invention creates a composite polymerizable compound that combines the optical properties of low-molecular-weight compounds with the processing advantages of materials having appropriate melting points and solubility, achieving both thin film formation and cost-effective manufacturing
2Manufacturing precision
If polymerizable compounds with excellent wavelength dispersion are used, then reverse wavelength dispersion is improved, but melting point becomes too high and solubility in industrial solvents decreases
Solution Approach 1:
The invention adjusts molecular parameters by introducing flexible chains (G1-G2 aliphatic groups), specific aromatic groups (A1-A3), and substituent patterns that maintain optical anisotropy while reducing intermolecular forces, thereby achieving low melting points without sacrificing reverse wavelength dispersion uniformity
Solution Approach 2:
The compound combines rigid aromatic groups (for optical properties) with flexible aliphatic chains and solubilizing groups (for low melting point and high solubility), creating a composite structure that balances optical performance with processing characteristics
3Manufacturing precision
If polymerizable compounds with excellent wavelength dispersion are used, then reverse wavelength dispersion is improved, but solubility in general-purpose solvents becomes low
Solution Approach 1:
The invention introduces solubilizing groups (Q1 alkyl groups, flexible G1-G2 chains) and adjusts the balance between rigid aromatic groups (for optical properties) and flexible/soluble groups, thereby achieving high solubility in general-purpose solvents without compromising reverse wavelength dispersion
Solution Approach 2:
The compound combines optically active aromatic groups with solubilizing aliphatic chains and substituents, creating a composite structure that maintains excellent reverse wavelength dispersion while ensuring high solubility for industrial processing
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 enables the production of an optically anisotropic article that provides uniform polarized light conversion over a wide wavelength band at a lower cost, with improved solubility and melting point characteristics, suitable for industrial applications.
Implementation Method 1
a polymerizable compound represented by formula (I), and a polymerizable composition including the polymerizable compound and an initiator
Implementation Method 2
the temperature range in which liquid crystallinity is obtained
Implementation Method 3
a quarter-wave plate that converts linearly polarized light into circularly polarized light, and a half-wave plate that converts the plane of vibration of linearly polarized light by 900
Data Source
AI summary
The present invention relates to: a polymerizable compound (I), wherein Y1 to Y6 are a chemical single bond, —O—C(═O)—, —C(═O)—O— or the like, G1 and G2 are a divalent aliphatic group, Z1 and Z2 are an alkenyl group, Ax is a fused ring group represented by a formula (II), wherein X is —NR3—, an oxygen atom, a sulfur atom or the like, R3 is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, and D is a substituted or unsubstituted ring having 1 to 20 carbon atoms that includes at least one nitrogen atom, Ay is a hydrogen atom, an alkyl group, A1 is a trivalent aromatic group or the like, A2 and A3 are a divalent aromatic group having 6 to 30 carbon atoms or the like, and Q1 is a hydrogen atom, or an alkyl group having 1 to 6 carbon atoms.