Polymerizable Liquid Crystal Composition Haze Reduction
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Solution Overview
Problem
Polymerizable liquid crystal compositions used in optically anisotropic bodies often result in films with poor transparency due to defective molecular alignment and high haze values, which is not adequately addressed by existing solutions.
Innovation Solution
A polymerizable liquid crystal composition containing a polymerizable haze-reducing agent with specific functional groups and polar groups is used, which enhances molecular alignment and adhesion to substrates, reducing haze and improving transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a polymerizable liquid crystal composition is applied onto substrates and cured through heating or irradiation with active energy rays, then an optically anisotropic body is formed, but the film exhibits defective molecular alignment and high haze value resulting in poor transparency
Solution Approach 1:
The invention changes the chemical composition parameters of the polymerizable liquid crystal composition by incorporating specific fluorinated compounds and chiral agents in controlled ratios. This parameter modification enables improved molecular alignment during the liquid crystal phase and maintains alignment after polymerization, thereby reducing haze and improving transparency
Solution Approach 2:
The invention uses a composite composition system combining polymerizable liquid crystal compounds, fluorinated haze-reducing agents, and chiral compounds. This composite approach leverages the synergistic effects of different components to achieve both good molecular alignment and low haze values that cannot be obtained with single components alone
2Object-affected harmful factors
If a fluorine compound is added to a polymerizable liquid crystal composition to improve molecular alignment and reduce haze, then transparency is improved, but transparency is still insufficient
Solution Approach 1:
The invention optimizes the concentration and chemical structure parameters of fluorinated compounds by selecting specific fluorine-containing liquid crystal compounds and haze-reducing agents with particular molecular structures. This precise parameter control enhances the effectiveness of fluorine compounds in reducing haze while improving overall transparency
Solution Approach 2:
The invention introduces chiral compounds as intermediary substances that mediate between the fluorinated liquid crystal compounds and the polymerization process. These chiral agents help maintain molecular alignment during the transition from liquid crystal phase to polymerized state, thereby improving transparency
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 enables the production of optically anisotropic bodies with improved transparency and adhesion, suitable for applications in retardation films and other optical materials.
Implementation Method 1
curing the polymerizable liquid crystal composition in this state through application of heat or irradiation with active energy rays
Data Source
AI summary
There is provided a polymerizable liquid crystal composition that enables a film formed through application of the composition and exposure thereof to heat or active energy rays to have an excellent molecular alignment and reduced haze. There is also provided an optically anisotropic body that is produced by using such a polymerizable liquid crystal composition and that has a good transparency. In particular, the present invention provides a polymerizable liquid crystal composition containing a polymerizable haze-reducing agent and a polymerizable liquid crystal compound. Furthermore, the present invention also provides an optically anisotropic body produced by using the polymerizable liquid crystal composition of the present invention. Using the polymerizable liquid crystal composition of the present invention enables production of an optically anisotropic body having a good transparency; hence, the polymerizable liquid crystal composition is usefully applied to optical materials used in, for example, retardation films.