Antimony Trioxide Powder

Antimony trioxide powder (Sb₂O₃) CAS No. 1309-64-4 is not simply "antimony white powder", but a super pure and controllable gas-phase flame retardant and efficiency enhancing platform constructed through extreme control of purity, particle size, morphology, and surface energy. It is designed for "performance peak" applications where halogen-free solutions are not yet achievable in terms of performance, cost, or process, such as thin-walled connectors that meet UL94 5VA, electrical insulation components with ultra-high leakage trace resistance index, and specific military and aerospace materials that require extreme gas quenching efficiency.

Core strengths

1. Ultra pure quality and precise physical and chemical control

-The main content of Sb₂O₃ is ≥ 99.95%, and the key impurity As₂O₃ is ≤ 0.03% PbO≤0.05%， Far superior to industry standards, eliminating the risk of harmful substance migration

-Whiteness ≥ 98.5, average particle size customizable 0.2-1.2 μ m (conventional 0.5-0.8 μ m), cubic crystal proportion ≥ 90%, excellent dispersibility, does not affect the substrate's natural color and processing fluidity

-Density of 5.2g/cm ³, melting point of 656 ℃, outstanding thermal stability, able to withstand high processing temperatures of polymer materials above 280 ℃, without decomposition or weight loss phenomenon

-Adopting vacuum drying process (110-120 ℃/6-8h), with a moisture content of ≤ 0.2%, there is no risk of clumping during long-term storage

2. Innovative modified technologies enhance collaborative efficiency

-By using a combination of white graphite powder and composite organic modifiers, the surface hydrophilic and oleophobic properties are reversed, and the compatibility with polymers such as PP, PVC, ABS is improved by 40%. The dispersion uniformity is significantly better than that of ordinary products

-The synergistic effect with halogen and phosphorus flame retardants is enhanced, rapidly generating antimony halide gas-phase flame retardant layer during combustion, while promoting the densification of the carbon layer. The flame retardant level can be increased by 1-2 levels

-Under the same flame retardant requirements, the addition amount is reduced by 15% -25% compared to ordinary antimony trioxide, effectively reducing the overall cost of the flame retardant system without affecting the mechanical strength of the substrate

3. "Nano micron" dual-mode particle size architecture

-Nanoscale primary particles (core): providing extremely high reactivity and specific surface area, they are the "activity engine" for achieving efficient gas-phase quenching.

-Micro scale controllable aggregates (transporters): Through soft aggregation technology, highly active nanoparticles are assembled into micro scale particles with good fluidity and easy dispersion. This solves the industrial problem that pure nano powder is difficult to process, easy to fly, and easy to agglomerate, making it perfectly integrated into the existing mixing and extrusion process.

4. Surface energy engineering and interface compatibility

We provide customized surface treatments for different polymer matrices (such as PVC, PC/ABS, PBT) to ensure excellent interface compatibility and uniform dispersion, avoiding local stress concentration, electrical performance degradation, or surface defects caused by agglomeration.

Application scenarios

Electronic and electrical field

-Application: Circuit boards, electronic device casings, connectors, insulation layers and sheaths for wires and cables

-Advantages: Helps products pass UL 94 V0 level and IEC 60695 fire certification, suitable for high flame retardant requirements of new energy vehicle wiring harnesses and 5G base station equipment

-Recommended dosage: 6% -12% (adjusted according to the substrate)

Plastic and rubber industry

-Application: PVC pipe/profile, PP film, ABS household appliance shell, PU foam, epoxy resin composite

-Advantages: Good dispersion, does not affect the appearance, color, and processing fluidity of the product, suitable for various processes such as extrusion, injection molding, blow molding, etc

-Recommended dosage: 5% -18% (halogenated synergistic system)

In the field of architecture and building materials

-Application: Fireproof coatings, flame-retardant boards, insulation materials, building wiring

-Advantages: Compliant with the EU CPR building product regulations, with a Limiting Oxygen Index (LOI) of ≥ 32 and a Smoke Density Rating (SDR) of ≤ 75

-Recommended dosage: 8% -20% (fireproof coating system)

High end specialized fields

-Application: Photovoltaic glass clarifying agent, semiconductor packaging material, ceramic glaze, industrial protective fabric

-Advantages: High purity formula to avoid impurities affecting product performance, customized particle size to meet technical requirements in different scenarios

-Recommended dosage: 1% -5% (in the field of photovoltaic glass)

Frequently Asked Questions

Q1: Does the use of antimony trioxide powder contradict the concept of sustainable development under environmental pressure?

A1: This is a problem that must be faced directly. Our philosophy is' responsible application '. Antimony trioxide powder is positioned for "critical applications" that have extreme requirements for safety and performance, and there is currently no equivalent halogen-free solution available to replace it. In these fields, the cost of material failure (life, huge property) far outweighs its environmental risks. Our responsibility is: firstly, to minimize the usage through ultra-high purity and efficiency; Secondly, provide comprehensive product lifecycle assessment (LCA) and safety handling guidelines; Thirdly, actively invest in research and development, and in the future, implement its functions through more environmentally friendly mechanisms. At the current stage, it is a "necessary choice" based on a comprehensive evaluation of risk and benefits.

Q2: How to ensure the stability of antimony trioxide powder in the formula and prevent performance changes during long-term storage or processing?

A2: We use "surface passivation encapsulation" technology to ensure stability. Construct a very thin (monolayer level), chemically inert silica or amorphous carbon protective layer on the surface of highly active nanoparticles. This protective layer can effectively prevent the activity of particles from decreasing due to moisture adsorption or surface oxidation during storage, while maintaining stability at the processing melt temperature. Only under the high temperature conditions of the fire, this protective layer will decompose, instantly exposing the highly active core and achieving a "timed triggering" efficiency release.

If you are looking for antimony trioxide powder, Sb₂O₃, Taixing will be your best partner and we will offer the most favorable price cooperation!