Light Absorbing Agent Resin Miscibility
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Solution Overview
Problem
Existing light absorbing agents containing copper ions and phosphonic acid compounds have limitations in miscibility with resins, leading to low visible light transmittance and inadequate near-infrared radiation blocking performance.
Innovation Solution
A light absorbing agent comprising a compound with a specific structure that includes a polyester structure bonded to a phosphorus atom, coordinated with a copper ion, which enhances miscibility with various resins, and a composition that includes this agent, a resin, and optional ligands, improving dispersiveness and optical performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a light absorbing agent containing copper ions and phosphonic acid is used, then near-infrared radiation blocking performance is improved, but miscibility with resin deteriorates
Solution Approach 1:
The patent modifies the chemical structure of the phosphonic acid compound by introducing a polyester group with specific repeating units (where n is 1-10) and controlling the molecular weight (100-10,000). This parameter change in the compound structure improves miscibility with resin while maintaining the near-infrared radiation blocking performance through the copper ion coordination.
Solution Approach 2:
The patent creates a composite light absorbing agent by combining copper ions with specifically structured phosphonic acid compounds containing polyester groups. This composite structure enables both near-infrared radiation absorption and improved resin miscibility, resolving the contradiction between performance and compatibility.
2Ease of manufacture
If a light absorbing agent with limited resin compatibility is used, then manufacturing simplicity is maintained, but visible light transmittance deteriorates
Solution Approach 1:
The patent optimizes the molecular weight of the phosphonic acid compound to the range of 100-10,000 and introduces polyester groups with specific repeating units. These parameter changes improve resin compatibility, which enhances visible light transmittance while maintaining ease of manufacture through straightforward dispersion processes.
3Quantity of substance
If conventional phosphonic acid compounds are used, then cost is reduced, but dispersiveness in resin deteriorates
Solution Approach 1:
The patent modifies the phosphonic acid compound structure by introducing polyester groups with controlled repeating units (n=1-10) and molecular weight (100-10,000). This parameter change significantly improves dispersiveness in resin while keeping the overall cost manageable by using established chemical synthesis methods.
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 solution achieves excellent miscibility with resins, resulting in optical members with enhanced visible light transmittance and near-infrared radiation blocking performance, suppressing haze and improving overall optical characteristics.
Implementation Method 1
a film that absorbs near-infrared radiation is disposed on a light receiving surface of such an image sensor to block near-infrared radiation
Implementation Method 2
A light absorbing agent according to one aspect of the present disclosure comprises a compound expressed by Formula (1) below and a copper ion... excels in miscibility with a resin
Data Source
AI summary
Provided is a light absorbing agent that excels in miscibility with a resin, a method of manufacturing such a light absorbing agent, a composition that excels in dispersiveness of such a light absorbing agent, and an optical member that excels in visible light transmitting performance and near-infrared radiation blocking performance. The light absorbing agent contains a compound expressed by Formula (1) below and a copper ion.In the above, R1 is a group expressed by Formula (2) above, R10 is an alkylene group or arylene group that may have a substituent, R12 is an alkylene group or arylene group that may have a substituent, and the other symbols are as described in the specification.