Flake-Shaped Glass Coating for Resin Adhesion
Solution Overview
Problem
Conventional surface treatments for fillers in resin molded articles, such as using silane coupling agents, do not achieve sufficient adhesion with matrix resins, especially when the filler is made of a different material like glass, leading to inadequate mechanical strength in the final product.
Innovation Solution
Glass flakes with a coating composed of a bismaleimide compound, a resin, and a silane coupling agent, where the binder includes a peroxide in limited amounts, are used as fillers to enhance adhesion with the matrix resin, improving mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the surface of a filler is treated with a silane coupling agent, then the adhesion between the filler and matrix resin is improved to some extent, but the adhesion is still unsatisfactory and mechanical strength is insufficient
Solution Approach 1:
The invention uses a composite coating containing both silane coupling agent and bismaleimide compound on the glass flake surface. This composite material approach combines the adhesion-promoting properties of silane coupling agent with the reinforcing properties of bismaleimide compound, achieving both satisfactory adhesion and high mechanical strength that neither component could achieve alone.
Solution Approach 2:
The invention changes the chemical composition parameters of the coating by introducing bismaleimide compound in specific amounts (0.1-10 mass%) alongside the silane coupling agent. This parameter change transforms the coating from a simple adhesion layer to a composite structure that provides both adhesion and reinforcement, resolving the contradiction between adhesion and mechanical strength.
2Reliability
If components are added to the matrix resin to enhance adhesion, then adhesion improvement is achieved, but the required amount of component increases undesirably
Solution Approach 1:
The invention applies the adhesion-improving components (silane coupling agent and bismaleimide compound) as a pre-formed coating on the glass flake surface before composite manufacturing. This preliminary action ensures that the components are concentrated exactly where needed at the filler-matrix interface, achieving high adhesion efficiency without requiring large amounts of these expensive components in the bulk matrix resin.
Solution Approach 2:
The invention concentrates the adhesion-improving components locally on the glass flake surface rather than distributing them throughout the entire matrix resin. This local quality approach ensures that the silane coupling agent and bismaleimide compound are positioned precisely at the filler-matrix interface where they are most effective, minimizing the total quantity needed while maximizing adhesion performance.
3Reliability
If a matrix resin is used as an agent for surface treatment of a filler, then adhesion improvement may be achieved, but the matrix resin itself cannot be expected to provide high effect on adhesion improvement
Solution Approach 1:
The invention introduces a specialized coating containing silane coupling agent and bismaleimide compound as an intermediary layer between the glass flake and matrix resin. This intermediary coating is specifically designed to bond with glass surfaces through silane chemistry while also providing strong adhesion to various matrix resins, making it universally applicable to different filler types and resin systems rather than relying on the matrix resin itself to provide adhesion.
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 glass flakes with the specified coating achieve strong adhesion and high mechanical strength in resin molded articles, providing a balanced reinforcing effect and workability.
Implementation Method 1
surface-treat the filler with a silane coupling agent or the like to enhance the adhesion between the matrix resin and the filler
Implementation Method 2
the binder includes a bismaleimide compound, a resin, and a silane coupling agent and includes a peroxide
Data Source
Figure 1
Figure 2
AI summary
Glass flakes according to the present invention include: glass flake substrates; and a coating covering at least a portion of a surface of each of the glass flake substrates and composed of a binder. The binder includes a bismaleimide compound, a resin, and a silane coupling agent as essential components and includes a peroxide as an optional component. The proportion of the peroxide in the binder is 8 mass% or less.