Polysiloxane Filler Treating Agent for Uniform Thermal Filler Dispersion
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Solution Overview
Problem
Conventional thermally conductive formulations face challenges in uniformly dispersing high levels of inorganic filler particles due to incompatibility with the matrix polymer, leading to phase separation, and existing filler treating agents (FTAs) are costly and require toxic reagents and complex synthesis.
Innovation Solution
A low-cost filler treating agent (FTA) with a specific random copolymer structure, prepared using acrylate or methacrylate compounds and a coupling catalyst, enhances compatibility and dispersability of filler particles in the matrix polymer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If conventional filler treating agents are used to improve dispersability of filler particles, then compatibility and uniform dispersion are improved, but production cost increases and toxic reagents are required
Solution Approach 1:
The invention changes the chemical structure parameters of the FTA by incorporating acrylic or methacrylic acid groups with specific ratios (n=0.1-5, p=0-5) and molecular weights (m=5-150), creating a cost-effective alternative to conventional FTAs while maintaining dispersability performance
Solution Approach 2:
The patent employs a simpler, more economical FTA structure that can be synthesized from readily available, low-cost raw materials, replacing expensive conventional FTAs without requiring complex purification steps or toxic reagents
2Reliability
If high levels of filler particles are loaded to improve thermal conductivity, then heat dissipation performance is improved, but uniform dispersion becomes more difficult and phase separation occurs
Solution Approach 1:
The FTA acts as an intermediary substance between the inorganic filler particles and the polymer matrix, with its dual-compatible structure (inorganic-compatible groups + organic-compatible acrylic/methacrylic groups) enabling high filler loading while preventing phase separation through improved interfacial compatibility
3Reliability
If conventional FTA synthesis procedures are used to achieve high performance, then dispersability is improved, but process complexity and use of toxic reagents increase
Solution Approach 1:
The invention extracts and eliminates the complex multistep synthesis procedures and toxic reagent requirements from conventional FTA production, achieving high dispersability performance through a simplified synthesis route that uses safe, readily available raw materials
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 new FTA achieves improved squeeze flow, extrusion rate, and thermal conductivity while reducing production costs and avoiding the use of toxic reagents, with formulations exhibiting favorable viscosity and extrusion properties.
Implementation Method 1
FTAs, which have chemical functionalities compatible with both the matrix polymer and the filler particles promote compatibility and improve the dispersability of filler particles with the matrix by associating with the surface of the inorganic particles
Data Source
AI summary
The present invention relates to a filler treating agent of Formula (I) where R1, R1′, R2, R2′, m, n, p, and q are as defined herein. The filler treating agent is useful as additive for thermally conductive formulations.