Thermosetting Resin Composition for Printed Wiring Boards
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Solution Overview
Problem
Thermosetting resin compositions used in printed wiring boards face challenges in maintaining low melt viscosity and stability when heated, leading to increased coefficient of linear expansion and decreased glass transition temperature, which affects their thermal properties and preservation stability.
Innovation Solution
Incorporating a radical polymerizable unsaturated compound and an organic radical compound in the thermosetting resin composition, which allows for a low-viscosity state when heated and improves preservation stability, while reducing the coefficient of linear expansion and maintaining the glass transition temperature, through controlled polymerization reactions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the thermosetting resin composition is heated to maintain low melt viscosity, then the preservation stability deteriorates and the coefficient of linear expansion increases, but the glass transition temperature decreases
Solution Approach 1:
The patent changes the chemical composition parameters by introducing a radical polymerizable unsaturated compound (containing vinyl, allyl, or methacrylic groups) and an organic radical compound into the thermosetting resin system. This compositional modification enables the resin to maintain low melt viscosity upon heating while simultaneously improving preservation stability and maintaining glass transition temperature, directly resolving the technical contradiction through parameter optimization
Solution Approach 2:
The patent creates a composite resin system by combining the thermosetting resin base with radical polymerizable unsaturated compounds and organic radical compounds. This composite formulation achieves synergistic effects where the radical polymerization mechanism works alongside the thermosetting curing process, enabling the resin to exhibit both low melt viscosity and high thermal stability simultaneously
2Ease of operation
If the thermosetting resin composition is heated to improve flowability, then the coefficient of linear expansion increases, but the flame retardancy deteriorates
Solution Approach 1:
The patent modifies the chemical composition by incorporating radical polymerizable unsaturated compounds and organic radical compounds, which change the thermal and rheological parameters of the resin. This enables the resin to achieve low melt viscosity and improved flowability upon heating while simultaneously maintaining flame retardancy through the synergistic polymerization mechanism that reduces coefficient of linear expansion
3Stability of the object's composition
If the thermosetting resin composition is heated to reduce viscosity, then the preservation stability decreases, but the curing speed increases
Solution Approach 1:
The patent introduces dynamic control over the polymerization process through the organic radical compound, which enables the resin to exhibit different behavior under different conditions: at storage temperatures, the resin remains stable with slow reaction kinetics, but upon heating, the radical polymerization activates to provide rapid curing. This dynamic response resolves the contradiction between preservation stability and curing speed
Solution Approach 2:
The patent utilizes temperature as a critical parameter to control the polymerization reaction. The radical polymerizable unsaturated compound and organic radical compound are designed to remain dormant at low temperatures (maintaining preservation stability) but become highly reactive upon heating (enabling fast curing). This temperature-dependent parameter change resolves the contradiction between stability and curing speed
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 maintains a low-viscosity state and improves preservation stability, reduces coefficient of linear expansion, and enhances the glass transition temperature and flame retardancy of the cured product, resulting in improved thermal properties and performance.
Implementation Method 1
contains: a radical polymerizable unsaturated compound; and an organic radical compound
Data Source
AI summary
The thermosetting resin composition contains a radical polymerizable unsaturated compound and an organic radical compound.