Polymerizable Composition for Hard Optical Films
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Solution Overview
Problem
Existing polymerizable compositions for optically anisotropic materials face challenges in achieving high hardness and durability, leading to inconsistencies in film coatings which affect the quality of displays, particularly in liquid crystal displays, due to precipitation of polymerizable compounds and uneven polymerization.
Innovation Solution
A polymerizable composition incorporating a trifunctional liquid crystal compound with specific polymerizable groups, which aligns and polymerizes to form a hard film, ensuring durability and consistency in optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If polymerizable liquid crystal compounds with reverse- or small-wavelength dispersion are added to achieve desired optical properties, then optical performance is improved, but preservation stability degrades due to crystal precipitation
Solution Approach 1:
The patent changes the molecular structure parameters of the polymerizable liquid crystal compound by introducing specific mesogenic groups and polymerizable groups at predetermined positions. This structural modification allows the compound to maintain reverse- or small-wavelength dispersion optical properties while improving preservation stability by preventing crystal precipitation through optimized molecular architecture
Solution Approach 2:
The patent creates a composite polymerizable composition by combining the specifically structured polymerizable liquid crystal compound with other compatible compounds. This composite approach ensures that the desired optical properties are maintained while the overall composition achieves improved preservation stability and coating uniformity
2Illumination intensity
If polymerizable compounds are added to meet optical property demands, then optical performance is improved, but manufacturing consistency deteriorates due to coating film inconsistencies
Solution Approach 1:
The patent modifies molecular parameters including the selection of specific mesogenic groups (cyclic structures with predetermined symmetry) and polymerizable groups, along with their positional arrangements. These parameter changes result in improved coating film uniformity while maintaining optical properties, eliminating the manufacturing consistency issues associated with conventional compounds
3Illumination intensity
If conventional polymerizable compositions are used to achieve optical properties, then optical performance is obtained, but mechanical strength is insufficient leading to low durability
Solution Approach 1:
The patent develops a composite polymerizable composition that integrates the specifically structured liquid crystal compound with other compatible compounds. This composite formulation achieves synergistic effects where the optimized molecular structure provides both desired optical properties and enhanced mechanical strength, resulting in durable films with sufficient hardness
Solution Approach 2:
The patent changes structural parameters by introducing specific mesogenic groups and positioning polymerizable groups at predetermined locations in the molecular structure. These parameter modifications enable the resulting polymer to achieve high hardness and durability while maintaining the required optical properties
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 composition effectively produces a polymer with high hardness and durability, maintaining film stability and optical quality by preventing compound precipitation and ensuring uniform polymerization, thus enhancing the performance of optically anisotropic materials and displays.
Implementation Method 1
a polymer having uniform alignment can be produced by aligning a polymerizable composition including a polymerizable compound while the polymerizable composition is in a liquid crystal state and subsequently polymerizing the polymerizable composition
Data Source
AI summary
An object of the present invention is to provide a polymerizable composition with which a polymer having a high degree of hardness can be produced. Another object is to provide, for example, an optically anisotropic body, a phase retardation film, an optical compensation film, an antireflection film, a lens, and a lens sheet that are composed of the polymerizable composition and a liquid crystal display element, an organic light-emitting display element, a lighting element, an optical component, a coloring agent, a security marker, a laser emission member, a polarizing film, a coloring material, and a printed item that are produced using the polymerizable composition. The present invention provides a polymerizable composition including a polymerizable compound represented by General Formula (IA) which has a specific structure including a plurality of polymerizable groups.