Radial Ray Curable Silicone Rubber Composition
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Solution Overview
Problem
Existing silicone rubber compositions curable by radial rays, such as UV beams, face issues with incomplete curing, substrate adhesion, and high light intensity requirements, leading to potential device contamination and unreliable sealing in electronic and electric devices.
Innovation Solution
A silicone rubber composition comprising an organopolysiloxane with specific hydrocarbon and acryl groups, a phenyl ester derivative, a radial ray sensitizer, and a photosensitive dye, which allows for rapid curing at low light intensity, ensuring excellent adhesion and anticorrosive properties, and visible curing indication without irradiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional organopolysiloxane composition with photo-polymerization initiator is used, then curing can be achieved by UV beam irradiation, but the composition remains as uncured liquid under normal conditions causing potential device contamination
Solution Approach 1:
The patent changes the chemical parameters of the composition by introducing organometallic catalyst and co-catalyst systems, enabling the polysiloxane to cure through chemical catalysis rather than requiring UV irradiation. This parameter change transforms the curing mechanism from photo-initiated to catalyst-initiated, allowing the material to remain stable and non-flowing under normal conditions while still achieving complete curing when activated
Solution Approach 2:
The patent extracts the photo-polymerization initiator from the composition formulation, eliminating the component that causes the material to remain as uncured liquid at room temperature. By removing this initiator and replacing it with a catalyst system, the harmful liquid state is eliminated while maintaining the desired curing capability through alternative chemical mechanisms
2Reliability
If existing organopolysiloxane composition with radial-ray reactive groups is used, then some curing capability is achieved, but the curing rate is insufficient and requires high light intensity
Solution Approach 1:
The patent employs a composite catalyst system combining organometallic catalyst with co-catalyst, creating a synergistic material composition that dramatically accelerates the curing reaction. This composite approach allows the system to achieve rapid curing at low light intensity by combining multiple chemical components that work together to enhance the overall curing efficiency and reaction rate
3Reliability
If conventional composition is used, then curing can be achieved, but it is difficult to determine whether the composition is fully cured or not
Solution Approach 1:
The patent incorporates a color indicator system that undergoes visible color changes based on the curing state of the composition. This allows operators to easily detect and measure the curing status by visual observation, transforming an otherwise difficult-to-detect chemical state change into a clear visual signal that indicates whether the material has reached full cure
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 achieves rapid curing with low light intensity, ensuring strong adhesion and excellent anticorrosive effects on substrates, even under severe conditions, and allows for easy visual confirmation of curing status, resulting in highly reliable sealed devices with improved moisture vapor transmission rates.
Implementation Method 1
a photosensitive dye... capable of easily distinguishing whether it is cured or not by observing appearance when not irradiated with a radial ray
Implementation Method 2
a sensitizer sensitized by a radial ray... (A) an organopolysiloxane... curable by a radial ray
Data Source
AI summary
There is disclosed a silicone rubber composition curable by a radial ray comprising, at least, (A) an organopolysiloxane shown by the following general formula (1), (B) a phenyl ester derivative having an acryl group, (C) a sensitizer sensitized by a radial ray, and (D) a photosensitive dye,wherein each R1, R2, and R3 independently represents a monovalent hydrocarbon group having 1 to 10 carbon atoms; X represents the same or different monovalent organic group having an acryl group or a methacryl group. As a result, there is provided a silicone rubber composition capable of being cured by irradiation of a radial ray whereby showing excellent adhesion with various substrates, capable of forming a cured film, and capable of easily distinguishing whether it is cured or not by observing appearance when not irradiated with a radial ray.