Surface-Treated Inorganic Powder With Stable Double-Bond Bonding
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Solution Overview
Problem
Existing methods for surface-treating inorganic powders with silane coupling agents to enhance mechanical strength in resin compositions are inefficient due to high temperature-induced aggregation and insufficient chemical bonding, leading to insufficient mechanical strength in cured bodies.
Innovation Solution
A surface-treated inorganic powder with a controlled amount of double bonds and a specific ratio of chemically to physically adsorbed silane coupling agents, achieved through a dry process at elevated temperatures and rigorous washing, ensuring optimal bonding with resin compositions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If surface treatment is performed at high temperature to improve treatment efficiency, then treatment time is reduced, but particles aggregate leading to insufficient mechanical strength
Solution Approach 1:
The patent changes the chemical composition parameters of the silane coupling agent by selecting specific structures (γ-methacryloxypropyl)trimethoxysilane or γ-acryloxypropyl)trimethoxysilane with controlled molecular weight and reactivity. This allows the surface treatment to proceed at high temperature without excessive aggregation, maintaining both treatment efficiency and mechanical strength by optimizing the chemical parameters of the coupling agent.
2Stability of the object's composition
If surface treatment is performed at low temperature to prevent particle aggregation, then particle dispersion is maintained, but treatment time increases significantly
Solution Approach 1:
The patent modifies the reaction parameters by using silane coupling agents with specific functional groups that have optimized reactivity. The γ-methacryloxypropyl or γ-acryloxypropyl structures provide balanced reactivity that enables effective surface treatment at elevated temperatures without causing severe aggregation, thus reducing treatment time while maintaining particle dispersion through controlled chemical reaction kinetics.
3Productivity
If high temperature surface treatment is applied to reduce treatment time, then productivity increases, but double bonds are consumed leading to insufficient bonding with resin
Solution Approach 1:
The patent selects silane coupling agents with specific double bond structures (methacryloyl or acryloyl groups) that have optimized polymerization characteristics. These structures maintain sufficient reactivity with curable resins even after high-temperature surface treatment by controlling the degree of double bond consumption during the surface treatment reaction, thereby preserving bonding capability while achieving high treatment efficiency.
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 method produces a surface-treated inorganic powder that enhances mechanical strength in cured bodies by maintaining sufficient double bonds and ensuring effective chemical bonding with the resin, thereby improving the overall mechanical properties.
Implementation Method 1
introduction of a functional group into a surface of the inorganic powder with a silane coupling agent... forming strong resin-particle bonding
Implementation Method 2
A compound having a polymerizable double bond, such as a photocurable resin or a thermosetting resin
Implementation Method 3
A compound having a polymerizable double bond, such as a photocurable resin or a thermosetting resin
Implementation Method 4
the dispersion liquid is treated with an ultrasonic disperser at an output of 40 W for 20 minutes
Data Source
AI summary
Provided are a surface-treated inorganic powder, which satisfies the following expression (1) and the following expression (2), and a method of producing the same, and a dispersion and a resin composition each containing the surface-treated inorganic powder: ⋅Expression (1) 3.0≤D1≤50.0; ⋅Expression (2) 1.00≤D1/D2<1.10, in the expression (1) and the expression (2), D1 represents a presence amount (μmol/m2) of double bonds contained in the surface-treated inorganic powder, and D2 represents a presence amount (μmol/m2) of double bonds contained in a washed powder, wherein the washed powder is a powder obtained by subjecting the surface-treated inorganic powder to predetermined washing treatments.