Optical Absorbent Composition for Heat-Stable Infrared Films
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Solution Overview
Problem
Existing optical absorbents face challenges in achieving excellent solubility or compatibility with various solvents and resin components, leading to poor optical properties under high temperature and humidity conditions, particularly for organic absorbents.
Innovation Solution
Development of an optical absorbent, represented by specific chemical formulas, exhibiting excellent compatibility with solvents and resin components, maintaining stable optical properties under high temperature and humidity conditions, with a molar mass range of 400 g/mol to 2,000 g/mol and a 5% pyrolysis temperature of 150°C or higher.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If organic optical absorbent is used to achieve easy application and wavelength control, then ease of manufacture is improved, but heat resistance deteriorates
Solution Approach 1:
The patent modifies the molecular structure of organic optical absorbents by introducing specific chemical groups and adjusting molecular weight parameters. The absorbent comprises a core structure with substituents at specific positions, where the substituent groups control both the absorption wavelength and thermal stability. By changing molecular parameters such as introducing rigid aromatic groups and controlling molecular weight within specific ranges, the patent achieves high heat resistance while maintaining optical properties.
Solution Approach 2:
The patent creates a composite molecular structure combining different functional groups within a single optical absorbent molecule. The core structure integrates chromophoric groups for optical absorption with thermally stable aromatic substituents. This composite molecular design allows the single compound to exhibit both excellent optical absorption characteristics and high heat resistance, resolving the contradiction between ease of manufacture and temperature stability.
2Ease of manufacture
If optical absorbent compatibility with solvents and resin components is improved, then ease of manufacture is improved, but optical properties under high temperature conditions deteriorate
Solution Approach 1:
The patent optimizes molecular parameters including molecular weight (controlled within specific ranges) and introduces flexible alkyl chain substituents that enhance solubility in various solvents and compatibility with resin components. The molecular structure includes both polar and non-polar regions that allow broad compatibility while the core aromatic structure maintains thermal stability.
Solution Approach 2:
The patent introduces intermediary alkyl chain groups and alkoxy substituents that act as mediators between the optical absorbent molecule and the surrounding solvent or resin matrix. These intermediary groups improve intermolecular interactions and compatibility without compromising the thermal stability of the core chromophoric structure, allowing the absorbent to maintain optical properties under high temperature conditions.
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 absorbent achieves desired optical characteristics and maintains stability under harsh conditions, suitable for applications such as optical absorption films, optical filters, and infrared sensors.
Implementation Method 1
an optical absorbent, for example, an absorbent capable of absorbing light in the infrared region
Data Source
AI summary
The present invention provides an optical absorbent and its application. The invention provides the optical absorbent, as an organic optical absorbent, exhibiting excellent compatibility or solubility in various solvents and resin components, and having excellent heat resistance thereby providing the optical absorbent capable of stably maintaining optical properties even under high temperature condition or high temperature and high humidity conditions. The present invention can also provide an optical absorption film that obtains desired optical properties by applying the optical absorbent. The present invention may also provide applications of the optical absorbent or the optical absorption film, and may provide, for example, an optical filter, a solid-state image capturing device, and/or an infrared sensor including the optical absorbent or the optical absorption film.