Ultra Fine ATH Powder CAS 21645-51-2 is halogen-free inorganic flame retardant and smoke suppressant. Featuring ultra-fine particle size and good dispersion in resin, it delivers outstanding endothermic flame retardancy and smoke suppression performance, widely applied in various epoxy resin formulations.

Product Detail

Ultra Fine ATH Powder CAS 21645-51-2 Smoke Suppressant for Epoxy Resin Flame Retardant

Product Overview

Ultra Fine ATH Powder (Aluminum Hydroxide, CAS 21645-51-2) is a high purity halogen-free inorganic flame retardant and smoke suppressant produced by ultrafine grinding and precision classification technology. During combustion, it decomposes endothermically and releases crystal water to cool the combustion zone, forming a dense alumina barrier layer to isolate oxygen and suppress smoke emission. Thanks to its ultra-fine particle size, it can disperse evenly inside epoxy resin, minimizing adverse impacts on mechanical strength, transparency and processing fluidity. It is an ideal flame retardant raw material for epoxy composite systems.

Core Features

Excellent Flame Retardancy & Smoke Suppression: Significant heat absorption effect, effectively reduce smoke density and avoid corrosive fumes.
Halogen-free & Environmentally Friendly: No halogen, low toxicity, compliant with environmental protection and electronic safety standards.
Ultra-fine Uniform Particles: Good dispersion in epoxy resin, reduce agglomeration, maintain good surface finish of cured products.
Insulation Performance: Improve dielectric property of epoxy products, suitable for electronic insulation components.
Stable Chemical Property: Inert under normal processing temperature, no premature decomposition during curing.
Optional Surface Treatment: Modified grades enhance compatibility with epoxy resin matrix.

Product Specifications

Product Name: Ultra Fine ATH Powder

CAS No: 21645-51-2

Chemical Name: Aluminum Hydroxide

Appearance: White fine powder

Processing Technology: Purification, ultrafine crushing, classification, optional surface modification

Core Function: Flame retardant, smoke suppressant, insulating filler

Application System: Epoxy resin casting, epoxy potting adhesive, epoxy composite, epoxy coating

Application Scope

This ultra fine ATH powder is specially developed for epoxy resin formulations. Widely used in epoxy potting compounds for electronic components, epoxy casting resins, epoxy anticorrosive coatings, epoxy composite materials, copper-clad laminates and insulating adhesive systems. It can be used alone or compounded with phosphorus flame retardants to reach target flame retardant grades such as UL94 V-0.

Usage Guide

Add Ultra Fine ATH powder during material mixing stage. Proper stirring time and dispersant are recommended to achieve uniform distribution. Optimize filling dosage according to flame retardant requirements and viscosity limit of epoxy system. Conduct small-scale formulation test before mass production. Keep packaging sealed to prevent moisture absorption.

Packaging & Storage

Packaging: 25kg plastic-lined woven bag, customized packaging is acceptable

Storage: Store in cool, dry and ventilated warehouse. Keep tightly sealed against moisture.

Shelf Life: 12 months under original sealed storage

Our Advantages

Our ultra fine ATH powder features narrow particle size distribution, low impurity and stable quality between batches. We provide unmodified and surface-modified grades to match different epoxy formulas. Professional technical support for epoxy flame retardant formulation adjustment. Factory direct supply ensures stable stock and fast delivery. Free samples are available for customer testing.

Previous : Nano Aluminum Hydroxide CAS 21645-51-2 Halogen Free Flame Retardant for Wire and Cable Materials Next : Surface Modified Nano Al(OH)3 CAS 21645-51-2 Flame Retardant Masterbatch for PP PE Plastics

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Jishengya Technology

Shenzhen Jishengya Technology Co., Ltd. is located in Shenzhen, a special economic zone, and is a comprehensive technology enterprise integrating independent R&D, production and sales.