Ultraviolet Absorber Compound for Resin Composition
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Solution Overview
Problem
Current ultraviolet absorbers face challenges in maintaining high absorption ability for longer wavelengths, particularly around 400 nm, and suffer from degradation due to light exposure, leading to poor light resistance and coloration issues.
Innovation Solution
A resin composition incorporating a specific compound with a defined structure, represented by Formula (1), which combines a group Q1 with Q2 in a specific combination, along with a resin, to enhance ultraviolet absorption, minimize coloration, and improve light resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If an ultraviolet absorber having a maximal absorption wavelength on a longer wavelength side in the ultraviolet region is used, then the absorption ability for ultraviolet rays around 400 nm is improved, but the light resistance deteriorates and the ultraviolet absorption ability is likely to be degraded with time
Solution Approach 1:
The patent applies parameter changes by precisely controlling the molecular structure parameters of the ultraviolet absorber compound. Specifically, it defines exact structural formulas (Formula 1 and Formula 2) with specific substituent positions and types, and controls the maximal absorption wavelength within a narrow range of 390-410 nm. This precise parameter control enables the compound to achieve both high ultraviolet absorption ability and excellent light resistance, resolving the contradiction between absorption performance and stability.
2Use of energy by moving object
If an ultraviolet absorber having a maximal absorption wavelength on a longer wavelength side in the ultraviolet region is used, then the absorption ability for ultraviolet rays around 400 nm is improved, but coloration occurs
Solution Approach 1:
The patent resolves the coloration issue by changing the structural parameters of the ultraviolet absorber. It specifies exact molecular structures (Formula 1 and Formula 2) with particular substituent groups at defined positions, and controls the maximal absorption wavelength within 390-410 nm. This precise structural parameter control allows the compound to absorb ultraviolet rays effectively around 400 nm while minimizing visible light absorption that causes coloration.
3Use of energy by moving object
If conventional ultraviolet absorbers are used, then ultraviolet absorption is provided, but the absorption ability for longer wavelengths around 400 nm is insufficient
Solution Approach 1:
The patent extends the ultraviolet absorption coverage by changing the molecular structure parameters. It defines specific compounds with formulas (1) and (2) featuring particular substituent groups (such as hydroxyl, alkoxy, halogen, or nitro groups) at specific positions, and controls the maximal absorption wavelength to be 390-410 nm. This parameter optimization enables effective absorption of longer wavelength ultraviolet rays around 400 nm, expanding the absorption coverage beyond conventional ultraviolet absorbers.
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 resin composition effectively produces a cured substance with excellent ultraviolet absorption at 400 nm, minimal coloration, and superior light resistance, addressing the limitations of existing ultraviolet absorbers.
Implementation Method 1
a compound having excellent absorption ability of ultraviolet rays in a vicinity of a wavelength of 400 nm
Data Source
AI summary
Provided is a resin composition containing a compound represented by Formula (1) and a resin, in which, in Formula (1), Q1 represents a group represented by Formula (Q-1), Q2 represents ═O, ═S, ═NRq1, or ═CRq2Rq3, Rq1 to Rq3 each independently represent a hydrogen atom or a substituent, and Rq2 and Rq3 may be bonded to each other to form a ring, provided that, in a case where Rq2 and Rq3 are bonded to each other to form a ring, ═CRq2Rq3 does not have the same structure as Q1, R1 and R2 each independently represent a hydrogen atom or a substituent, and X1 to X4 each independently represent —S— or the like. The present invention also relates to a cured substance, an optical member, an ultraviolet absorber, a compound, a production method of a compound, and a polymer.