Magnetic Particle Curable Composition for Uniform Low-Shrinkage Curing
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Solution Overview
Problem
Existing curable compositions face challenges in achieving uniform curing and desired physical properties, particularly in complex shapes, due to insufficient heat transfer and potential resin damage from external heat sources, and they require high fluidity which can lead to prolonged processing times and reduced curing efficiency.
Innovation Solution
A curable composition incorporating magnetic bodies that generate heat through magnetic reversal vibration phenomena under an external alternating magnetic field, allowing for low viscosity and efficient curing with minimal shrinkage, and achieving high dielectric breakdown strength for insulating applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If external heat sources (hot air or hot plate) are used for curing, then the composition can be cured, but heat transfer to the interior is insufficient causing curing heterogeneity and potential resin damage
Solution Approach 1:
The patent introduces a magnetic particle system as an intermediary heat generation mechanism. Magnetic particles dispersed in the composition convert electromagnetic energy to heat internally, serving as a mediator that enables uniform curing without direct external heat contact, thus avoiding resin damage while achieving curing uniformity.
Solution Approach 2:
The patent replaces the mechanical/thermal conduction system (external heat sources) with an electromagnetic field system. By applying electromagnetic radiation to induce magnetic particle vibration and heat generation, the curing process achieves superior heat distribution and eliminates the harmful effects of external heat contact.
2Shape
If the composition viscosity is reduced to improve fluidity for narrow/complex shapes, then filling capability improves, but processing time increases and curing degree deteriorates
Solution Approach 1:
The patent changes the heating parameter from slow external thermal conduction to rapid internal electromagnetic heating. This parameter change enables the composition to be cured quickly even at low viscosity, achieving high filling rates in complex shapes without prolonged processing time that would deteriorate curing degree.
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 effectively cures in complex shapes with high filling rates and desired physical properties, maintaining low viscosity and minimizing curing shrinkage, while ensuring excellent insulation and efficient heat generation for uniform curing.
Implementation Method 1
the magnetic body is selected so as to be capable of generating heat by a magnetic reversal vibration phenomenon through an external alternating magnetic field
Data Source
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AI summary
The present application relates to a curable composition. The present application can provide a curable composition which can be applied in a state having low viscosity, and fluidity, and then effectively cured without causing curing shrinkage or the like to form a cured product having desired physical properties.