Dual-Curable Adhesive Composition for Light-Shielded Curing
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Solution Overview
Problem
Existing dual-curable hybrid compositions require multiple curing facilities and processes, leading to complexity and prolonged curing times, especially in light shielded areas where UV curing is ineffective.
Innovation Solution
A dual-curable adhesive composition comprising a photo-initiator, thermal initiator, and thiol group-containing compound, with specific ratios, allowing for single or concurrent curing by UV or heat, ensuring adequate curing in light shielded areas without additional equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If UV curing is used, then curing time is reduced and external atmosphere is not affected, but light shield portions cannot be cured
Solution Approach 1:
The patent combines UV-curable acrylate resin and thermo-curable epoxy resin into a single dual-curable adhesive composition. This merging allows the adhesive to utilize both UV light curing (for rapid surface curing) and thermal curing (for complete curing including in light shielded areas), thereby resolving the contradiction between fast curing time and complete curing in light shield portions.
Solution Approach 2:
The patent changes the curing mechanism by incorporating both photo-initiators and thermal initiators into the adhesive formulation. By adjusting the curing parameters to accept both UV light and heat as activation methods, the adhesive can cure completely in light shielded areas through thermal curing while maintaining rapid curing capability through UV curing, thus resolving the contradiction.
2Reliability
If thermal curing is used, then light shield portions can be cured, but curing time increases and external atmosphere is affected
Solution Approach 1:
The patent merges UV-curable and thermo-curable resin systems into a single composition, allowing UV curing to proceed first for rapid surface curing, followed by thermal curing for complete curing in light shielded areas. This sequential dual-curing approach reduces overall curing time compared to thermal curing alone while ensuring complete curing in light shield portions.
Solution Approach 2:
The patent applies preliminary UV curing to the adhesive composition before final thermal curing. This preliminary action cures the surface layer rapidly through UV light, and subsequent thermal curing completes the process in light shielded areas, thereby reducing total curing time while ensuring complete curing throughout, including in light shield portions.
3Adaptability or versatility
If dual-curable hybrid composition with multiple curing methods is used, then both UV and thermal curing can be performed, but curing process becomes complicated and takes longer
Solution Approach 1:
The patent merges multiple curing capabilities into a single adhesive composition that can be cured by either UV light or heat alone, or by both simultaneously. This unified dual-curable formulation simplifies the curing process compared to using separate compositions for different curing methods, while maintaining versatility and reducing overall curing time through concurrent UV and thermal curing.
4Adaptability or versatility
If dual-curable hybrid composition is used, then both photo-curable and thermo-curable resins are included, but multiple curing facilities are required
Solution Approach 1:
The patent creates a universal adhesive composition that can be cured by multiple methods (UV light, heat, or both simultaneously) within a single system. This multi-functional curing capability eliminates the need for separate curing facilities for different resin types, as one dual-curable adhesive composition can be processed using either UV curing equipment or thermal curing equipment, thereby reducing device complexity while maintaining versatility.
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 efficient, rapid curing in both UV-exposed and shielded areas, providing excellent adhesion and durability while minimizing storage instability and equipment needs.
Implementation Method 1
a photo-curable adhesive that may be cured by forming radicals through light (e.g., UV) irradiation of a specific wavelength
Implementation Method 2
a thermo-curable adhesive that may be cured by forming radicals through heating
Implementation Method 3
a dual-curable hybrid composition that may be cured by UV-heat, TV-moisture, and UV-anaerobic methods
Data Source
AI summary
The present invention provides a dual-curable hybrid adhesive composition including a photo-initiator, a thermal initiator, and a thiol group-containing compound, and more particularly, to an adhesive composition which may be cured through a single curing by ultraviolet (UV) light or heat, and where thermal curing proceeds concurrently with UV curing by a heat generated during the UV curing such that even a light shield portion which may not transmit UV light therethrough may be sufficiently cured.