Optically Anisotropic Film Light Fastness via Aromatic Polyether Stabilization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The light fastness of optically anisotropic films formed using polymerizable liquid crystal compositions is compromised by the type of polymerizable compound and blending conditions of additives, leading to suboptimal performance in optical applications.
Innovation Solution
A polymerizable liquid crystal composition combining a polymerizable liquid crystal compound with reverse-wavelength dispersion properties and an aromatic polyether-based compound, specifically formulated with certain structural components and pKa ranges, is used to enhance the light fastness of optically anisotropic films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a polymerizable liquid crystal composition is used to form an optically anisotropic film, then the film achieves desired optical properties, but the light fastness deteriorates due to decomposition of the polymerizable compound
Solution Approach 1:
The patent introduces an aromatic polyether-based compound as an intermediary substance that acts as a stabilizer or protective agent. This compound mediates between the polymerizable liquid crystal compound and environmental factors (light, oxygen) that cause decomposition, thereby improving light fastness without compromising the optical properties of the film.
Solution Approach 2:
The patent creates a composite liquid crystal composition by combining the polymerizable liquid crystal compound with the aromatic polyether-based compound. This composite formulation leverages the complementary properties of both components: the optical anisotropy and polymerizability of the liquid crystal compound, and the stabilizing effect of the aromatic polyether compound, achieving both desired optical performance and improved light fastness.
2Length of moving object
If the wavelength of the long molecular axis is decreased and the wavelength of the short axis is increased to achieve reverse-wavelength dispersion properties, then the refractive index increases and film thickness can be reduced, but the light fastness deteriorates
Solution Approach 1:
The patent modifies the molecular parameters of the liquid crystal compound by incorporating specific structural features (cycloalkylene skeleton, aromatic polyether-based compound) that enable reverse-wavelength dispersion properties. By carefully adjusting molecular dimensions and electronic structure, the patent achieves high refractive index with reduced film thickness while the aromatic polyether component simultaneously provides protection against light-induced decomposition.
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 combination significantly improves the light fastness of optically anisotropic films, ensuring their durability and performance in optical films, polarizing plates, and display devices by suppressing decomposition and enhancing energy levels.
Implementation Method 1
a polymerizable liquid crystal compound having reverse-wavelength dispersion properties
Implementation Method 2
the light fastness of an optically anisotropic film thus formed is improved by using a polymerizable liquid crystal compound exhibiting reverse-wavelength dispersion properties in combination with an aromatic polyether-based compound
Data Source
AI summary
A polymerizable liquid crystal composition capable of manufacturing an optically anisotropic film having excellent light fastness; and an optically anisotropic film, an optical film, a polarizing plate, an image display device, and an organic electroluminescent display device, each of which uses the polymerizable liquid crystal composition. The polymerizable liquid crystal composition of an embodiment of the present invention contains a polymerizable liquid crystal compound having reverse-wavelength dispersion properties and an aromatic polyether-based compound.