Powder treatment agent, method for preparing the same, and use thereof

By preparing a powder treatment agent with a specific structure, the problems of insufficient aging resistance and increased viscosity of thermally conductive materials were solved, achieving good flowability and thermal conductivity under high filling volume, and improving the heat aging resistance and workability of the material.

CN117447509BActive Publication Date: 2026-06-26DONGGUAN CITY BETTERLY NEW MATERIALS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DONGGUAN CITY BETTERLY NEW MATERIALS CO LTD
Filing Date
2023-10-31
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Existing surface treatment agents have insufficient aging resistance, which leads to cracking and sagging in thermally conductive materials, affecting heat dissipation. Furthermore, the viscosity of thermally conductive powder increases and its flowability decreases as the filling amount increases.

Method used

A powder treatment agent with a specific structure is prepared by reacting organohydrosiloxane with vinyltriorganooxysilane and alkenylcyclosiloxane. This agent improves the dispersibility and heat aging resistance of thermally conductive powders and inhibits viscosity increase.

Benefits of technology

It improves the filling amount and thermal conductivity of the thermally conductive material while maintaining good fluidity and heat aging resistance, avoiding volatilization and increased hardness during high-temperature processes, and ensuring the construction performance of the thermally conductive material.

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Abstract

The application provides a powder treating agent with a structure shown in formula (I) and a preparation method and application thereof, wherein R1, R2, R3 and R5 represent the same or different substituted or unsubstituted monovalent hydrocarbon groups, R4 independently represents the same or different substituted or unsubstituted monovalent organic groups, the powder treating agent has excellent treating effect on a heat-conducting material, can inhibit the increase of viscosity while improving the filling amount, maintains good fluidity, the main chain is polysiloxane, has excellent heat aging resistance and is not easy to be thermally degraded, contains certain vinyl active groups, the vinyl active groups can be reacted with hydrogen-containing silicone oil in a rubber compound, and volatilization in a high-temperature process is avoided, the heat-conducting gel prepared by modifying the powder through the self-prepared modifier has high heat conductivity, has good heat aging resistance and construction performance, and has high application reliability.
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