Ultrafine Antimony Trioxide

Ultrafine antimony trioxide (Sb₂O₃), as a key raw material suitable for high-end halogen-free flame retardant systems and precision functional materials, systematically reduces its particle size to the sub micron level (D50 ≤ 0.5 μ m), triggering a chain revolution from reaction kinetics to final product performance. It fundamentally solves the two major bottlenecks of traditional micrometer level ATO in complex polymer systems: the "reaction dead zone" caused by incomplete dispersion, and the "flame retardant response lag" caused by slow reaction initiation.

Core strengths

1. Nanoscale precise particle size control and ultra pure quality

-The average particle size D50 is 0.3-0.5 μ m (customizable to 0.1 μ m), with a particle size distribution span of ≤ 0.2 μ m, no large particle impurities, and a specific surface area of up to 25-35m ²/g. The dispersibility far exceeds that of similar products in the industry.

-The main content of Sb₂O₃ ≥ 99.95%, key impurities As₂O₃ ≤ 0.015%, PbO ≤ 0.02%, Fe₂O₃ ≤ 0.003%, to prevent the migration of harmful substances and meet the strict requirements of electronic grade and food contact grade materials.

-Whiteness ≥ 99, cubic crystal proportion ≥ 99%, regular spherical crystal morphology, excellent compatibility with organic matrix, without affecting substrate transparency and surface glossiness.

-Adopting vacuum inert gas protection drying process, the moisture content is ≤ 0.1%, the powder has good flowability, and there is no agglomeration or agglomeration phenomenon during long-term storage. The deviation of physical and chemical indicators between batches is ≤± 0.03%.

2. Innovative modified technologies enhance collaborative efficiency

-The surface was double coated and modified by silane coupling agent KH-570+hyperbranched polymer, which was used to build an organic functional layer on the surface of particles through chemical bond cooperation. The dispersion stability was improved by 70%, and the problem of agglomeration of nano powders was completely solved.

-The synergistic effect with halogen-free phosphorus based, nitrogen based, and expansion type flame retardants is significantly enhanced, and a dense nano carbon layer and a gas-phase free radical capture layer are rapidly formed during combustion. The flame retardant rating can jump from HB level to UL 94 V0 level, and the limit oxygen index (LOI) is ≥ 38.

-Under the same flame retardant requirements, the addition amount of antimony trioxide is reduced by 30% -40% compared to ordinary antimony trioxide, significantly reducing material density and formulation costs, and the impact rate on the tensile strength and impact toughness of the substrate is ≤ 5%.

-It has both smoke suppression and anti dripping functions, with a smoke density rating (SDR) of ≤ 45 during combustion, no melting or dripping phenomenon, and meets the EU EN 13501-1:2024 fire and smoke standards.

Application scenarios

In the field of new energy vehicles

-Application: Power battery pack shell, high-voltage wire harness insulation layer, interior flame retardant material, charging pile shell

-Advantages: Good dispersion, does not affect the lightweight design of materials, helps products pass UL 94 V0 level (1.6mm), IEC 60695-2-11 flame retardant certification, and adapts to the safety requirements of 800V high-voltage platforms

-Recommended dosage: 3% -8% (halogen-free flame retardant system)

5G Electronics and Semiconductor Field

-Applications: 5G base station antenna covers, semiconductor packaging materials, mobile phone casings, flexible circuit boards

-Advantages: Nanoscale particle size does not affect the dielectric properties of materials, high flame retardant efficiency, suitable for high-frequency signal transmission needs, avoiding signal shielding and attenuation

-Recommended dosage: 2% -5% (packaging material)/4% -8% (electronic casing)

High end architecture and building materials field

-Application: Transparent flame retardant glass, fireproof coating, flame retardant insulation board, elevator decoration material

-Advantages: High whiteness, high transparency, no impact on the appearance and light transmittance of building materials, ultimate oxygen index ≥ 35, in line with the B1 fire protection requirements of the EU CPR building regulations

-Recommended dosage: 5% -12% (fireproof coating)/8% -15% (transparent flame-retardant material)

Special plastics and rubber field

-Application: Medical grade PVC pipes, food packaging films, high-end seals, aerospace composite materials

-Advantages: low impurities, high dispersibility, meeting the safety requirements of medical and food contact materials, and improving the weather resistance and aging resistance of materials

-Recommended dosage: 3% -6% (medical materials)/5% -10% (aviation composite materials)

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