Curable Composition Flow Activation Device
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Solution Overview
Problem
Existing radiation curable compositions face challenges such as complex manufacturing equipment requirements, difficulty in achieving homogeneous irradiation in constricted spaces, potential damage to light-sensitive substrates, and increased risk of human exposure to actinic radiation.
Innovation Solution
A curable composition comprising a (meth)acrylate compound, a sulfinate, and a copper-based organic compound, which is used in a flow activation device. The composition's pot life is controlled by varying the actinic radiation dose, allowing for flexible curing times and eliminating the need for additional secondary curing steps.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiation curable compositions are used in a two-step process (application followed by irradiation), then curing can be achieved, but complex manufacturing equipment is required and homogeneous irradiation is difficult in constricted spaces
Solution Approach 1:
The composition is pre-activated with a low dose of actinic radiation during dispensing to initiate polymerization before application. This preliminary action ensures that curing begins immediately upon contact with substrates, eliminating the need for complex post-application irradiation equipment and ensuring complete cure even in constricted spaces where secondary irradiation would be difficult.
2Reliability
If actinic radiation is applied after dispensing, then curing is achieved, but light-sensitive substrates may be damaged and human exposure to harmful radiation increases
Solution Approach 1:
The composition is pre-activated with a low dose of actinic radiation during dispensing to initiate polymerization before application. This preliminary action ensures that curing begins immediately upon contact with substrates, eliminating the need for complex post-application irradiation equipment and ensuring complete cure even in constricted spaces where secondary irradiation would be difficult.
Solution Approach 2:
The radiation dose is divided into two stages: a low initial dose during dispensing to start polymerization, and no secondary dose required. This parameter change in radiation dosing strategy reduces total radiation exposure and eliminates damage risks to light-sensitive substrates while maintaining complete curing.
3Productivity
If acrylic based compositions are used, then rapid curing is achieved, but pot life cannot be controlled and secondary curing steps are required for complete cure
Solution Approach 1:
The composition uses a controlled release mechanism where a copper-based organic compound reacts with sulfinate to generate radicals gradually over time. This parameter change in the curing mechanism allows pot life to be controlled while maintaining rapid curing upon activation, eliminating the need for secondary curing steps.
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 enables efficient bonding, sealing, or coating of substrates with controlled pot life and curing time, simplifying the manufacturing process by reducing equipment needs and minimizing risks associated with actinic radiation exposure.
Implementation Method 1
a (meth)acrylate compound M1; a sulfinate; a copper-based organic compound
Data Source
AI summary
The present invention relates to the use of a curable composition C in a flow activation device for the bonding, sealing or coating of substrate, wherein the curable composition C comprises: - a (meth)acrylate compound; - a sulfinate ; - copper-based organic compound.