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Aluminium hydroxide ($Al(OH)_3$), synthetically classified as Alumina Trihydrate (ATH), is the most widely applied non-halogenated flame retardant in the world. As a white, crystalline, amphoteric powder, ATH behaves as a functional filler that decomposes endothermically at approximately 200°C. During decomposition, it releases water vapor and forms an insulating layer of aluminum oxide ($Al_2O_3$) on the polymer substrate. This prevents further combustion, dilutes flammable gases, and suppresses toxic smoke emissions.
With mounting safety regulations governing wire and cable, electronics casing, automotive compounding, and insulation materials, traditional halogenated flame retardants are being phased out due to toxicity concerns. Aluminium Hydroxide powder serves as the ideal substitute, offering low toxicity, high chemical stability, excellent smoke-suppressive qualities, and exceptional cost-effectiveness when sourced from modern refining facilities.
Through close collaboration with premier Chinese engineering academies and key alumina refiners, Yanxatech delivers specialized materials meeting stringent particle-size distributions (PSD), precise chemical compositions, and customizable surface modifiers (such as silanes and stearic acids). This ensures optimal dispersion and physical properties when processed into diverse polymer matrices.
The global demand for high-performance Aluminium Hydroxide powder is heavily tied to the urbanization, electrification, and safety-focused regulatory trends across developed and emerging economies. The market is divided into two primary segments:
Primarily utilized as a functional flame-retardant filler in cross-linked polyethylene (XLPE), ethylene-vinyl acetate (EVA) cable compounds, unsaturated polyesters, epoxy resin systems, and silicone rubbers. These applications require strict particle size control to ensure the mechanical integrity of the end-product is not compromised under heavy filler loading.
Broadly consumed as an economical filler in solid surfaces (artificial marble, acrylic sheets), sheet molding compounds (SMC), bulk molding compounds (BMC), glass manufacturing, and as a starting chemical precursor for aluminum salts, including Polyaluminum Chloride (PAC) used in worldwide water-treatment systems.
Specifically manufactured for advanced electronic substrates, high-performance ceramic formulations, catalytic carrier systems, and special lithium-ion battery separator coatings. Maintaining exceptionally low sodium and iron impurity limits is vital to prevent electrical leakage or thermal runaway events.
Geographically, Europe and North America enforce some of the world's strictest fire safety mandates (such as the EU's CPR - Construction Products Regulation), creating a high demand for ATH in construction cables. Meanwhile, the Asia-Pacific region, led by China, is the primary manufacturing hub for electronics, plastics, and EV batteries, driving massive consumption of specialized, fine-precipitated Aluminium Hydroxide powders.
China's dominance in the global Aluminium Hydroxide market is built on robust upstream bauxite processing, integrated energy infrastructure, and advanced chemical engineering equipment. When choosing a Chinese factory for Aluminium Hydroxide supply, buyers benefit from several key operational advantages:
| Parameters (Standard Industrial Grade) | Standard Fine Precipitated ATH | Coarse Filler ATH | Surface Treated (Silane/Stearic) |
|---|---|---|---|
| Al(OH)3 Content (%) | ≥ 99.6% | ≥ 99.2% | ≥ 99.0% |
| D50 Particle Size (µm) | 1.2 - 2.2 µm | 10 - 25 µm | 1.5 - 3.0 µm |
| Whiteness (%) | ≥ 97.5% | ≥ 93.0% | ≥ 96.0% |
| Oil Absorption (ml/100g) | 35 - 45 | 18 - 25 | 25 - 30 |
| Moisture Content (%) | ≤ 0.2% | ≤ 0.15% | ≤ 0.25% |
To maximize the effectiveness of Aluminium Hydroxide powder, formulators must understand how it interacts with different polymer structures and processing methods. Below is a breakdown of key applications:
In EVA and polyethylene-based compounds, ATH loading rates often reach 50% to 65% by weight to meet standard fire tests (like UL 94 V-0). To prevent loss of tensile strength and elongation at break, we recommend using surface-treated ultrafine grades. These grades improve polymer matrix bonding and reduce viscosity during compounding.
For acrylic (PMMA) or unsaturated polyester artificial marbles, coarse ATH serves as both a flame retardant and an aesthetic filler. Its refractive index (1.57) closely matches PMMA, giving artificial marble sheets excellent transparency, high resistance to thermal shock, and a clean, stain-resistant finish.
In thermoset electrical enclosures, junction boxes, and transit panels, sheet and bulk molding compounds require ATH filler to control flame propagation and minimize arc tracking. Proper particle packing (blending coarse and fine grades) helps optimize resin flow and maintain mechanical strength in complex molds.
Yanxatech System Industries Limited (hereinafter referred to as YANXA) is one of the growing suppliers in the field of specialty materials in China. Starting from fledgling small business unit in 2008, YANXA is driven with the passion of developing broad international market in the area relating to chemical and mechanical industry. Thanks to our team’s enduring and persistent work and our business partners’ long-lasting support, YANXA has steadily and vigorously grown into one company with excellence in delivering products and services relating to specialty chemicals.
Cooperating with leading manufacturers and the renowned research institutes in the field of specialty chemicals in China, YANXA is capable of supplying:
1) liquid rubber;
2) nitrate;
3) metal powder & metal alloyed powders.
Quality, safety and efficiency prevail all the values in our business. We care what our customers’ need on the general product as well as their unique and specific requirement for the newly developed application in a timely manner. We adhere strictly to the technical requirement and make delivery in almost perfect conformity. Chemical business exposes more safety concerns than any other industrial sectors. We undertake all activities involving chemicals in a safe way to ensure safety of human health and the environment.
Through our continuous modernization, YANXA’s partner manufacturing factories have grown into premier ISO9001:2008 Certified facilities, offering high-quality, cost-effective industrial products with strict environmental compliance.
We maintain strict production oversight across all our chemical lines, including specialty polymers, formaldehyde compounds, and metallic powders.
Formaldehyde is a colorless liquid, easily polymerized, and readily soluble in water, alcohol, and ether. It is rapidly oxidized to formic acid in air, acting as a strong reducing agent. Supplied commercially as formalin (37-50% solution), it contains methanol as a polymerization inhibitor.
Also known as HMTA (CAS No. 100-97-0, C₆H₁₂N₄), this white crystalline powder is produced by reacting formaldehyde and ammonia. It is a versatile intermediate used in plastics, rubber compounding, explosives, and pharmaceutical manufacturing.
A white, solid linear polymer of formaldehyde with a light, flammable odor. Our grade features high purity (≥96% content), fast solubility, and strictly controlled pH (5-7) and formic acid levels (≤0.05%).
When sourcing Aluminium Hydroxide powder internationally, procurement departments must evaluate several critical performance and logistical factors to ensure supply chain stability and consistent quality:
A narrow particle size distribution (PSD) is key to maintaining the mechanical properties of highly filled polymers. Sourcing teams should request dry-laser diffraction particle size reports (e.g., Microtrac or Malvern) for every batch to confirm D50, D10, and D90 parameters.
Standard ATH begins to decompose at 200°C. If your compounding temperature exceeds 200°C (typical for certain polyamides or polycarbonates), you may need boehmite (AlOOH), which is stable up to 340°C. Talk to our technical team to determine the best option for your process.
Surface treatments (silane, stearic acid, or coupling agents) modify the hydrophilic nature of ATH, improving its compatibility with hydrophobic polymers. Sourcing managers should verify the coating coverage percentage and its impact on compound viscosity.
Find answers to common technical, logistics, and commercial questions about sourcing industrial materials from YANXA.
We supply specialized chemical agents, industrial gases, and liquid elastomers to clients worldwide. Review our product pages below:
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