一种微米级六角片状氢氧化镁及其制备方法、应用

By controlling the hydrothermal reaction conditions and introducing a dispersant, micron-sized hexagonal flake magnesium hydroxide with high purity, regular morphology, and uniform particle size was prepared, solving the problem of uneven purity and particle size of magnesium hydroxide in the prior art and improving its flame retardant and smoke suppression performance in EVA materials.

CN118084026BActive Publication Date: 2026-07-17DALIAN UNIV OF TECH

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
DALIAN UNIV OF TECH
Filing Date
2024-02-20
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, magnesium hydroxide prepared from brucite has problems such as low purity, uncontrollable crystal form, and uneven particle size distribution, making it difficult to simultaneously improve flame retardancy and processing performance.

Method used

By controlling the hydrothermal reaction time and temperature, the material ratio of the reaction system, and other conditions, the morphology and particle size of the crystals were regulated. Using pH adjusters and dispersants, micron-sized hexagonal flake magnesium hydroxide with regular morphology and uniform particle size was prepared.

Benefits of technology

Obtaining micron-sized hexagonal flake magnesium hydroxide with high purity, regular morphology, and uniform particle size significantly improves its performance as a flame retardant and smoke suppressant, especially in its application in EVA materials.

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Abstract

本发明公开了一种微米级六角片状氢氧化镁及其制备方法、应用,制备方法包括以下步骤:将水镁石进行煅烧,得到轻烧氧化镁;将轻烧氧化镁与水混合,得到氧化镁悬浮液;采用pH调节剂调节氧化镁悬浮液的pH为6~8后进行过滤,得到氯化镁溶液;pH调节剂为盐酸和氨水;将氯化镁溶液、氢氧化钠溶液和分散剂混合后在温度为130℃~190℃的条件下进行水热反应2h~10h,得到反应产物;将反应产物经冷却、过滤、洗涤、干燥,得到形貌规则、粒径均匀以及高纯度的高品质微米级六角片状氢氧化镁,其作为阻燃剂和 / 或抑烟剂用于EVA材料的制备时,可显著提高EVA的阻燃和抑烟能力。
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