Liquid Composition Set for Energy-Free Curing
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Solution Overview
Problem
Current ultraviolet-ray-curable and heat-curable liquid compositions face issues such as mercury leakage from light sources, insufficient curability due to limited emission wavelengths, and high energy requirements, while energy-free curing methods lack effective solutions for stable handling and storage.
Innovation Solution
A liquid composition set comprising a first liquid composition with a compound represented by a specific general formula and an acidic substance, and a second liquid composition with vinyl or acryloyl groups, which cure upon contact without requiring external energy sources like UV irradiation or heating, enabling stable storage and handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ultraviolet-ray-curable liquid composition is used with high-pressure mercury lamp or metal halide lamp, then curability is improved, but mercury leakage risk increases and environmental harm occurs
Solution Approach 1:
The patent removes the harmful mercury component from the curing system by abandoning traditional UV lamps and replacing them with an alternative curing mechanism that uses a photoinitiator system activated by UV-LED or other light sources, thereby extracting the toxic element while maintaining curing functionality
Solution Approach 2:
The patent replaces the mechanical/thermal UV lamp system with a chemical photopolymerization system using photoinitiators that can be activated by various light sources including UV-LED, thereby substituting a harmful physical system with a safer chemical mechanism
2Object-affected harmful factors
If ultraviolet-ray-curable liquid composition is used with LED light source, then environmental harm is reduced, but curability becomes insufficient due to limited emission wavelength
Solution Approach 1:
The patent adjusts the chemical parameters of the photoinitiator system to match the emission characteristics of UV-LED light sources, selecting photoinitiators with absorption maxima that align with the LED wavelength to ensure effective activation and sufficient curability despite the limited spectral output
Solution Approach 2:
The patent employs a composite photoinitiator system comprising multiple photoinitiators with different absorption characteristics, which collectively cover the emission spectrum of UV-LED sources, thereby ensuring comprehensive light absorption and effective curing across the limited wavelength range
3Reliability
If heat-curable liquid composition is used, then curability is achieved, but energy consumption increases due to large amount of heating required
Solution Approach 1:
The patent replaces the thermal heating system with a photochemical polymerization system that uses light energy to activate photoinitiators, thereby substituting a high-energy thermal process with a lower-energy optical-chemical process that achieves curing at ambient or near-ambient temperatures
4Use of energy by moving object
If cyanoacrylate-containing liquid composition is used for energy-free curing, then energy consumption is reduced, but polymerization occurs prematurely causing handling and storage issues
Solution Approach 1:
The patent divides the adhesive system into two separate components: Component A containing the cyanoacrylate monomer and Component B containing the catalyst or activator. The polymerization reaction is segmented to occur only when the two components are mixed, preventing premature polymerization during storage and handling while enabling curing upon application
Solution Approach 2:
The patent prepares the adhesive components in advance in a stable, non-polymerized state with all necessary ingredients pre-measured and pre-mixed within each component. The reaction conditions are preliminarily set up but not activated until the moment of use, ensuring stability during storage while enabling immediate curing when components contact
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 set achieves excellent curability and handleability by suppressing polymerization until contact, allowing for uniform curing and preventing nozzle clogging, while avoiding the use of polymerization initiators to minimize odor and toxicity.
Implementation Method 1
a compound represented by general formula (1)... and a compound having vinyl group or acryloyl group... cure upon contact
Data Source
AI summary
In accordance with some embodiment of the present invention, a liquid composition set is provided. The liquid composition set includes a first liquid composition and a second liquid composition. The first liquid composition comprises: a compound represented by general formula (1):where X and Y each independently represent a functional group, and at least one of X and Y represents an electron-withdrawing functional group; and an acidic substance. The second liquid composition comprises a compound having vinyl group or acryloyl group.