Silane-Treated Glass Flake Resin Composition for Impact Strength
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Solution Overview
Problem
Resin compositions using glass flakes as fillers face challenges in achieving high impact strength compared to those using fibrous fillers like glass fibers, making it difficult to incorporate them into resin molded articles requiring high impact strength.
Innovation Solution
The use of glass flakes with specific size and surface treatment, including a silane coupling agent, in a resin composition enhances the impact strength of the resulting resin molded article.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If glass flakes are used as filler in resin composition, then adhesion between matrix resin and filler is improved through surface treatment, but impact strength of the resin molded article remains very low compared to fibrous fillers
Solution Approach 1:
The patent applies parameter changes by precisely controlling the particle size distribution of glass flakes (D10: 4.7-25 μm, D90: 90 μm or smaller, D90/D10 ratio: 2.0-3.0) and optimizing the silane coupling agent content (0.05-3 mass%). These parameter optimizations resolve the contradiction by achieving both strong adhesion through proper surface treatment and high impact strength through controlled particle size distribution, preventing both aggregation and excessive refinement that would compromise mechanical properties
2Strength
If glass flakes with specific size distribution are used, then impact strength is improved, but particle size control complexity increases
Solution Approach 1:
The patent employs preliminary action by pre-establishing the optimal particle size distribution range for glass flakes before resin composition formulation. By defining specific D10 (4.7-25 μm), D90 (90 μm or smaller), and D90/D10 ratio (2.0-3.0) parameters in advance, the invention simplifies the overall development process and enables straightforward selection of suitable glass flake products without requiring complex real-time control during manufacturing
3Strength
If silane coupling agent is applied for surface treatment, then adhesion between matrix resin and filler increases, but manufacturing process complexity increases
Solution Approach 1:
The patent applies this principle by using commercially available pre-surface-treated glass flakes that have been coated with silane coupling agents during manufacturing. This approach eliminates the need for complex on-site surface treatment equipment and processes, allowing manufacturers to simply incorporate the pre-treated flakes into their resin compositions, thereby achieving strong adhesion without increased manufacturing complexity
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 resin composition with treated glass flakes improves the impact strength, appearance, and surface smoothness of the molded article, making it suitable for applications where fibrous fillers are not viable.
Implementation Method 1
it has been considered preferable to surface-treat the filler with a silane coupling agent or the like to enhance the adhesion between the matrix resin and filler
Data Source
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AI summary
Glass flakes of the present invention have an average particle diameter of 0.1 to 15 µm and an average thickness of 0.1 to 2 µm. The glass flakes have a particle size distribution in which the particle diameter at 99% of the cumulative volume from the smaller particle diameter is 45 µm or less, and the maximum particle diameter of the glass flakes is 62 nm or less.