Benzoxazine Resin Toughening with Core-Shell Particles
Solution Overview
Problem
Benzoxazine-based resin systems exhibit high brittleness, requiring impact modification for most applications, and existing tougheners are not easily formulated or compatible with the benzoxazine matrix, limiting their effectiveness.
Innovation Solution
A polymerizable composition comprising benzoxazine compounds and core-shell particles, where the core comprises a polymer of ethylenically unsaturated monomer (A) and the shell comprises a crosslinked polymer of ethylenically unsaturated monomer (B) with an aromatic group, enhancing impact resistance and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional tougheners are added to benzoxazine-based resin systems, then impact resistance is improved, but compatibility and ease of formulation are worsened
Solution Approach 1:
The patent modifies the chemical structure parameters of the toughener by incorporating reactive functional groups (epoxy, carboxyl, hydroxyl, or amino groups) that can chemically interact with the benzoxazine matrix. This chemical parameter change enables compatibility and ease of formulation while maintaining impact resistance improvement
Solution Approach 2:
The patent creates a composite toughener system combining a polymer base (polyester, polyether, polyamide, or polyurethane) with reactive functional groups. This composite structure allows the toughener to maintain its impact-modifying properties while gaining chemical compatibility with the benzoxazine resin system through the reactive groups
2Strength
If conventional tougheners are added to benzoxazine-based resin systems, then impact resistance is improved, but compatibility with the benzoxazine matrix is worsened
Solution Approach 1:
The patent changes the chemical composition parameters of the toughener by incorporating reactive functional groups (epoxy, carboxyl, hydroxyl, or amino groups) that can form chemical bonds or strong interactions with the benzoxazine matrix. This parameter change ensures compatibility and homogeneous distribution in the resin system while maintaining impact resistance
Solution Approach 2:
The reactive functional groups on the toughener act as chemical intermediaries that bridge the toughener and the benzoxazine matrix. These functional groups facilitate compatible interaction between the toughener and the resin system, ensuring stable composition and homogeneous distribution
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 modifies the impact resistance of benzoxazine-based systems, ensuring good compatibility and dispersibility, thereby improving mechanical properties without significant changes in glass transition temperature or flexural strength.
Implementation Method 1
The composition effectively modifies the impact resistance of benzoxazine-based systems
Implementation Method 2
ensuring good compatibility and dispersibility
Data Source
AI summary
The present invention relates to a polymerizable composition comprising at least one polymerizable benzoxazine compound and core-shell particles, where the core of the core-shell particles comprises at least one (co)polymer of at least one ethylenically unsaturated monomer (A) and the shell of the core-shell particles comprises at least one crosslinked (co)polymer of at least one ethylenically unsaturated monomer (B), where the ethylenically unsaturated monomer (B) encompasses at least one aromatic group. The present invention further relates to adhesives, sealants or coatings, which encompass the polymerizable composition of the invention, and also to the polymerization products of this composition. The present invention further relates to a process for the production of the polymerizable composition of the invention.