Infrared-Absorbing Composition for Broad-Spectrum IR Shielding
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Solution Overview
Problem
Existing infrared-absorbing compositions do not effectively shield infrared rays in a wide wavelength range, necessitating further improvement in spectral characteristics.
Innovation Solution
An infrared-absorbing composition comprising particles of an infrared-absorbing coloring agent with two or more maximal absorption wavelengths in the range of 650 to 1500 nm, where the absorbance ratio of the shortest to second shortest wavelength sides is 0.6 to 2.0, and the coloring agent is a pyrrolopyrrole or squarylium compound with specific functional groups, allowing for enhanced infrared shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional infrared-absorbing compositions are used, then the composition can absorb some infrared rays, but the shielding effectiveness across a wide wavelength range is insufficient
Solution Approach 1:
The patent changes the molecular structure parameters of the coloring agent by introducing specific substituents (Formula 1 and Formula 2 groups) to pyrrolopyrrole or squarylium compounds, which shifts and broadens the absorption spectrum to cover 650-1500 nm range effectively
Solution Approach 2:
The patent creates a composite coloring agent system combining pyrrolopyrrole or squarylium core structures with specific functional groups (Formula 1 and Formula 2), achieving synergistic effect that broadens absorption coverage while maintaining high absorbance
2Adaptability or versatility
If multiple types of coloring agents are used to broaden absorption range, then wavelength coverage improves, but composition complexity increases
Solution Approach 1:
The patent designs a universal coloring agent platform based on pyrrolopyrrole or squarylium cores that can achieve broad-spectrum infrared absorption (650-1500 nm) through single compound design, eliminating the need for multiple different coloring agents while maintaining comprehensive wavelength coverage
3Manufacturing precision
If the absorbance ratio at different wavelengths is not optimized, then the composition is simpler to manufacture, but the spectral characteristics are insufficient
Solution Approach 1:
The patent optimizes the absorbance ratio parameter (0.6-2.0 between shortest and second shortest wavelength absorbances) by adjusting the molecular structure parameters of the coloring agent, achieving balanced spectral characteristics that simplify quality control during manufacturing
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 achieves excellent infrared shielding properties across a wide wavelength range using a single type of coloring agent, forming films with improved spectral characteristics and infrared ray blocking capabilities.
Implementation Method 1
particles of an infrared-absorbing coloring agent... the particles in the infrared-absorbing composition have two or more maximal absorption wavelengths exhibited in a wavelength range of 650 to 1500 nm
Data Source
AI summary
An infrared-absorbing composition includes particles of an infrared-absorbing coloring agent and a solvent, in which the particles in the infrared-absorbing composition have two or more maximal absorption wavelengths exhibited in a wavelength range of 650 to 1500 nm, and in the range, in a case where an absorbance at a maximal absorption wavelength existing on a second shortest wavelength side is set to 1, an absorbance at a maximal absorption wavelength existing on a shortest wavelength side is 0.6 to 2.0.