Silica gel supported siloxane functional additive, its preparation method and application

By using vacuum processing to allow siloxane to enter the pores of silica gel, the problem of limited loading of siloxane in powder coatings is solved. This enables uniform dispersion of siloxane in powder coatings and the preparation of self-healing coatings, improving the hydrophobicity and lubrication durability of the coating.

CN118256106BActive Publication Date: 2026-07-03GUANGDONG UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
GUANGDONG UNIV OF TECH
Filing Date
2024-04-29
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

In the existing technology, it is inconvenient to add siloxanes to powder coatings, the loading capacity is limited, the durability is poor, and the porous structure of silica gel is not effectively utilized to achieve high proportion loading and controllable loading.

Method used

A siloxane solution is mixed with mesoporous silica gel under vacuum conditions. The solvent is removed and the air is expelled, allowing the siloxane to enter the silica gel channels. This process prepares a silica gel-loaded siloxane functional additive, which increases the loading capacity and makes it controllable.

Benefits of technology

It achieves uniform dispersion and stable storage of siloxane in powder coatings, and the coating surface has self-healing properties, improving the durability of the coating's hydrophobicity and lubrication performance.

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Abstract

This invention belongs to the field of new materials technology, specifically relating to a functional additive for silica-supported siloxanes, its preparation method, and its application. This invention uses siloxane dissolved in an organic solvent as the main active ingredient and dry mesoporous silica gel as the carrier material. After mixing, the organic solvent is completely evaporated under vacuum, while simultaneously allowing siloxane molecules to enter the pore structure of the mesoporous silica gel. Due to the large internal storage space of mesoporous silica gel, the siloxane loading ratio in the functional additive prepared by this invention is large and adjustable; for example, in some embodiments, the ratio of siloxane to silica gel is 1:0.1–3. Furthermore, because mesoporous silica gel has good compatibility with organic coatings, compared to traditional liquid siloxanes, the functional additive of this invention can achieve more uniform dispersion, thus making it easier to store, transfer, and apply to powder coatings.
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