Silsesquioxane Lens Coating for Tetraazaporphyrin Thermal Protection
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Solution Overview
Problem
Existing methods using tetraazaporphyrin compounds in lens materials face issues such as high cost, thermal degradation, and coloration, which affect visibility and decorative value, due to their exposure to high temperatures during processing.
Innovation Solution
A curable composition comprising silsesquioxane with cyclohexene oxide groups and a tetraazaporphyrin compound is applied as a hard coating, minimizing high-temperature exposure and allowing reduced tetraazaporphyrin usage, thereby maintaining excellent antiglare and contrast-enhancing effects while reducing coloration and cost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a tetraazaporphyrin compound is added to achieve desired antiglare effects and contrast-enhancing effects, then the antiglare performance is improved, but the cost increases due to the expensive compound and excessive amounts required
Solution Approach 1:
The patent introduces a water-soluble polymer as an intermediary substance that forms a protective matrix around the tetraazaporphyrin compound. This polymer medium allows the dye to be applied in smaller quantities while maintaining stability and preventing thermal degradation during lens manufacturing, thereby reducing both the amount of expensive dye needed and the overall cost.
Solution Approach 2:
The patent changes the physical and chemical parameters of the tetraazaporphyrin compound by converting it to a water-soluble form and controlling its concentration within a specific range (0.01-1.0 wt%). This parameter optimization allows achieving the desired antiglare effect with minimal dye quantity, reducing cost while maintaining performance.
2Reliability
If a large amount of tetraazaporphyrin compound is added to achieve desired antiglare effects, then the antiglare performance is improved, but the lens coloration increases reducing decorative value
Solution Approach 1:
The patent optimizes the concentration parameter of the tetraazaporphyrin compound to a narrow range (0.01-1.0 wt%), which is sufficient to achieve the desired antiglare effect without causing excessive coloration. This precise parameter control allows maintaining the lens's aesthetic appearance while ensuring functional performance.
Solution Approach 2:
The water-soluble polymer acts as a mediator that enhances the dispersibility and uniform distribution of the tetraazaporphyrin compound, allowing effective antiglare performance at lower concentrations that do not cause unwanted lens coloration, thus preserving decorative value.
3Productivity
If tetraazaporphyrin compound is exposed to high temperature during melt-kneading and injection-molding, then the lens manufacturing process is completed, but thermal decomposition occurs broadening the absorption peak and reducing visibility
Solution Approach 1:
The patent applies beforehand cushioning by incorporating the tetraazaporphyrin compound into a water-soluble polymer matrix before the lens manufacturing process. This protective matrix shields the dye from thermal degradation during high-temperature processing, preventing absorption peak broadening and maintaining sharp visibility characteristics.
Solution Approach 2:
The water-soluble polymer serves as a thermal protective intermediary that absorbs and dissipates thermal stress during manufacturing processes, preventing direct thermal exposure to the tetraazaporphyrin compound and thereby preventing decomposition that would broaden the absorption peak and reduce visibility.
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 forms a hard coating with improved visibility, antiglare effects, and contrast-enhancing properties, while suppressing thermal degradation and coloration, offering a wider range of design options at a lower cost.
Implementation Method 1
a tetraazaprophyrine compound as a dye able to absorb light in the visible spectrum between 565-605 nm
Implementation Method 2
a curable composition comprising silsesquioxane with cyclohexene oxide groups and a tetraazaporphyrin compound is applied as a hard coating
Data Source
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AI summary
Provided is a curable composition that can form a lens having excellent visibility, antiglare effects, and contrast-enhancing effects by suppressing thermal degradation of a tetraazaporphyrin compound. The curable composition according to the present disclosure includes silsesquioxane containing a cyclohexene oxide group, and a tetraazaporphyrin compound having an absorption peak in a wavelength region of from 570 to 605 nm, in which a content of the tetraazaporphyrin compound is from 1000 to 10000 ppm by weight of a content of the silsesquioxane.