Solvent-Free Epoxy Encapsulation for Electrical Components
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing encapsulation materials for electrical components lack long-term storage stability, are not one-component, solvent-free, non-halogenated, and fail to provide fast gelling/curing, high glass transition temperature, and excellent mechanical, electrical, and flame-retardant properties.
Innovation Solution
A one-component, solvent-free, non-halogenated, heat curable composition comprising epoxy resins, phosphorus-containing epoxy resins as flame retardants, cyclic anhydride hardening agents, catalysts, rheology modifiers, and heat stabilizing agents, which cures to form a product with rapid gelling/curing, high glass transition temperature, and superior mechanical, electrical, and flame-retardant properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If existing encapsulation materials are used, then they provide basic encapsulation function, but they lack long-term storage stability and do not exhibit fast gelling/curing properties
Solution Approach 1:
The patent modifies the chemical composition parameters by using specific epoxy resins (e.g., bisphenol A diglycidyl ether) with controlled epoxy equivalents and molecular weights, combined with cyclic anhydride hardening agents in optimized ratios, to achieve both long-term storage stability and fast gelling/curing properties that existing materials fail to provide simultaneously
Solution Approach 2:
The invention creates a composite encapsulation system combining epoxy resins with cyclic anhydride hardening agents and phosphorus-containing flame retardants, where the synergistic interaction between components provides both storage stability and rapid curing, overcoming the limitations of single-component existing materials
2Object-affected harmful factors
If existing encapsulation materials are used, then they provide basic protection, but they are not solvent-free and not non-halogenated
Solution Approach 1:
The patent extracts and eliminates harmful solvents and halogenated compounds from the encapsulation material composition, using a solvent-free system based on epoxy resins and cyclic anhydride hardening agents that cures to form a protective encapsulation without requiring volatile organic compounds or halogenated flame retardants
Solution Approach 2:
The invention changes the chemical parameters by selecting non-halogenated phosphorus-containing flame retardants and solvent-free formulations, transforming the material composition to meet environmental safety requirements while maintaining manufacturability through controlled chemistry
3Strength
If existing encapsulation materials are used, then they provide basic encapsulation, but they fail to provide high glass transition temperature and excellent mechanical properties
Solution Approach 1:
The patent optimizes formulation parameters including the ratio of epoxy resin to cyclic anhydride hardening agent, the molecular weight distribution of epoxy components, and the concentration of phosphorus-containing flame retardants to achieve high glass transition temperature and excellent mechanical properties while managing formulation complexity
Solution Approach 2:
The invention develops a composite formulation where epoxy resins provide the base matrix, cyclic anhydride hardening agents create crosslinked networks for high Tg, and phosphorus-containing compounds provide flame retardancy, with the synergistic composite achieving superior mechanical properties that exceed basic encapsulation requirements
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 fast gelling/curing, high glass transition temperature, and excellent mechanical, electrical, and flame-retardant properties, making it suitable for long-term storage stability and effective encapsulation of electrical components.
Implementation Method 1
heat curable composition which cures to form a cured product
Implementation Method 2
epoxy resins; cyclic anhydride hardening agents; fast gelling/curing
Implementation Method 3
non-halogenated flame retardants based on a phosphorus containing epoxy resin; excellent flame retardant properties in accordance with UL94 standard
Implementation Method 4
one or more catalysts; fast gelling/curing
Implementation Method 5
one or more heat stabilizing agents; high glass transition temperature; excellent mechanical properties
Data Source
AI summary
A storage stable, one-component, solvent-free, non-halogenated, heat curable composition which cures to form a cured product for use in encapsulation of electrical components, including: (a) an epoxy resin; (b) a non-halogenated flame retardant based on phosphorus containing epoxy resin; (c) a cyclic anhydride hardening agent; (d) a catalyst; (e) a rheology modifier; (f) a heat stabilizing agent; and (g) wherein the composition is fast gelling/curing and exhibits a high glass transition temperature, and excellent mechanical, electrical, and flame-retardant properties.