Resin Composition With 400 nm UV Absorption and Low Coloring
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Solution Overview
Problem
Existing ultraviolet absorbing agents struggle to effectively absorb ultraviolet rays with a wavelength of approximately 400 nm while minimizing coloring.
Innovation Solution
A resin composition containing a compound represented by Formula (1) or (1a), which includes specific alkyl, aryl, or heterocyclic groups, and alkoxy, acyloxy, or carbamoyloxy groups, enhancing absorption of ultraviolet rays at 400 nm and reducing coloring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ultraviolet absorbing agents are used, then they provide basic UV absorption, but they cannot effectively absorb ultraviolet rays at 400 nm wavelength
Solution Approach 1:
The patent modifies the molecular structure parameters of the ultraviolet absorbing agent by introducing specific substituents (alkyl, aryl, heterocyclic groups at positions R1-R6) to shift the absorption spectrum toward longer wavelengths, enabling effective absorption at 400 nm while maintaining stability
Solution Approach 2:
The invention creates a composite ultraviolet absorbing agent combining multiple functional groups (alkoxy, acyloxy, carbamoyloxy groups) within a single molecular structure to achieve both high absorption efficiency at 400 nm and resistance to coloring
2Reliability
If conventional ultraviolet absorbing agents are used, then they provide UV absorption function, but they cause significant coloring
Solution Approach 1:
The patent applies local quality modification by placing specific electron-donating groups (alkoxy, acyloxy, carbamoxyl) at particular positions (R1-R6) of the benzodithiol core structure, creating localized electronic effects that suppress coloring while maintaining UV absorption capability
Solution Approach 2:
By changing the chemical parameters of the molecular structure through substituent selection and positioning, the patent achieves a balance between UV absorption function and coloring resistance, allowing the material to absorb UV rays effectively without developing unwanted coloration
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 achieves excellent ultraviolet ray absorption at 400 nm with minimal coloring, improving compatibility with resins and reducing surface unevenness.
Implementation Method 1
the compound represented by Formula (1) described below is a compound which has an excellent absorption ability with respect to ultraviolet rays having a wavelength of approximately 400 nm
Data Source
Figure 1~2
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Figure 5~6
AI summary
Provided is a resin composition including a compound represented by Formula (1), and a resin. R1 and R2 in Formula (1) each independently represent an alkyl group or the like, R3 and R6 each independently represent an alkoxy group or the like, R4 represents an alkyl group, an aryl group, an alkoxy group, or an aryloxy group, and R5 represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, or an aryloxy group. Provided are a cured substance, an ultraviolet absorbing agent, an ultraviolet cut filter, a lens, a protective material, a compound, and a method of synthesizing a compound.