Epoxy Casting Resin Thermal Shock Resistance via Core Shell Polymer
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Solution Overview
Problem
Conventional epoxy resin compositions for casting, despite containing silica, silica, polyether polyol, and core shell polymers, fail to significantly improve thermal shock resistance and often compromise heat resistance.
Innovation Solution
An epoxy resin composition comprising silica powder, liquid epoxy resin, polyether polyol, liquid acid anhydride, curing accelerator, and core shell polymer, with specific weight ratios and molecular weights, to enhance thermal shock resistance and heat resistance synergistically.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If polyether polyol and core shell polymer are added separately to liquid epoxy resin and silica powder, then thermal shock resistance is hardly improved, but the composition becomes more complex
Solution Approach 1:
The patent combines polyether polyol and core shell polymer into a single pre-mixed composition that is added to the epoxy resin system. This merging of components simplifies the overall composition structure while maintaining the synergistic effects needed for improved thermal shock resistance, directly addressing the contradiction between achieving reliability and reducing complexity
2Reliability
If conventional epoxy resin composition with silica is used, then thermal expansion coefficient matches metal parts, but thermal shock resistance remains insufficient
Solution Approach 1:
The patent creates a composite material system that combines epoxy resin, silica powder, polyether polyol, and core shell polymer in specific proportions. This composite structure allows the composition to maintain good thermal expansion matching with metal parts while the rubber components provide the necessary flexibility and stress relaxation to achieve sufficient thermal shock resistance
3Stability of the object's composition
If large amount of silica is used to reduce thermal expansion coefficient, then thermal expansion match improves, but impact resistance decreases
Solution Approach 1:
The patent changes the physical and chemical parameters of the composition by introducing polyether polyol and core shell polymer at controlled concentrations. These parameter changes allow the system to maintain the low thermal expansion coefficient provided by silica while adding flexibility and toughness through the rubber components, thereby improving impact resistance without sacrificing thermal expansion matching
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 improved thermal shock resistance and heat resistance in the cured product, maintaining mechanical characteristics and handling properties.
Implementation Method 1
Patent Document 1 discloses that a composition contains an epoxy resin, silica, and a polyether polyol having molecular weight of 1000 or less, and the composition has effects on internal stress relaxation
Implementation Method 2
In the case where the epoxy resin composition contains silica, the epoxy resin composition has a lower thermal expansion coefficient, and the difference between the thermal expansion coefficient of the epoxy resin composition and the thermal expansion coefficient of a metal part to be insulated and protected becomes small
Data Source
AI summary
The object of the present invention is to provide an epoxy resin composition for casting having excellent heat resistance and thermal shock resistance. The epoxy resin composition for casting of the present invention contains a silica powder (A), a liquid epoxy resin (B), a polyether polyol (C), a liquid acid anhydride (D), a curing accelerator (E), and a core shell polymer (F) .