Benzoxazine-Based Resin Composition for High-Solid Prepreg Processing
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Solution Overview
Problem
Conventional methods for producing benzoxazine-based resin compositions and prepregs are cumbersome and require high solvent use, leading to low solid content concentrations and prolonged drying times.
Innovation Solution
A resin composition containing a compound with a benzoxazine ring and an aldehyde group, mixed with an aromatic amine compound, achieving a high aldehyde group content of at least 50 mol% and minimal solvent use, eliminating the need for re-dissolving the polymer and simplifying the production process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to produce benzoxazine-based resin composition, then the production process can be completed, but the process becomes cumbersome and requires high solvent use
Solution Approach 1:
The invention changes the chemical composition parameters of the resin system by incorporating aromatic amine compounds with specific structural features (multiple amino groups and aromatic rings) into the benzoxazine resin system. This compositional parameter change enables the resin to achieve high solid content (≥50 wt%) while maintaining proper curing characteristics and eliminating the need for excessive solvent use.
Solution Approach 2:
The invention creates a composite resin system by combining benzoxazine resin with aromatic amine compounds. This composite material approach allows the system to achieve both high solid content and proper processing characteristics, resolving the contradiction between reducing solvent use and maintaining ease of manufacture.
2Ease of operation
If high solvent use is employed in the resin composition, then the resin can be processed, but the solid content concentration remains low
Solution Approach 1:
The invention achieves high solid content concentration (≥50 wt%) by changing the chemical composition parameters of the resin system. The aromatic amine compounds used have specific molecular weight ranges (50-500 g/mol) and structural features that enable high concentration formulation while maintaining proper viscosity and processability.
Solution Approach 2:
The invention applies local quality by selecting aromatic amine compounds with specific local molecular structures (aromatic rings, multiple amino groups) that provide both high solid content and proper processability. The specific structural features at the molecular level enable the resin to maintain ease of operation at high concentrations.
3Ease of operation
If low solid content concentration is used in the resin composition, then the resin can be processed, but the drying time is prolonged
Solution Approach 1:
The invention changes the concentration parameter to ≥50 wt% solid content, which directly reduces drying time while the aromatic amine compounds ensure the resin remains processable. This parameter change resolves the contradiction between processability and drying time by maintaining proper molecular structure and reactivity at high concentrations.
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
This approach results in a simpler and more efficient production process with higher solid content concentrations, facilitating easier solvent evaporation and improved operational efficiency.
Implementation Method 1
a benzoxazine compound cures in a case where a benzoxazine ring undergoes ring opening polymerization and/or a reaction with another compound by heat or the like
Implementation Method 2
it becomes easier to evaporate a solvent in a prepreg
Data Source
AI summary
Provided is an advantageous production method for a curable resin composition. A resin composition in accordance with the present disclosure is a resin composition that contains a compound (A) having a benzoxazine ring and an aldehyde group and an aromatic amine compound (B), wherein the resin composition contains the aldehyde group in an amount of not less than 50 mol %, and the resin composition contains a solvent in an amount of not less than 0% by weight and not more than 68% by weight, where 100 mol % represents a total amount of the aldehyde group and an imino group in the resin composition.