Nano Antimony Trioxide

Nano antimony trioxide (Sb₂O₃), as the core raw material for adapting halogen-free flame retardant upgrades and precision functional materials, is not only a quantitative change in particle size, but also a qualitative change in reaction mode: it upgrades the traditional "particle surface reaction" to "full particle instantaneous bulk reaction". This means that you have increased the contact area of the halogen antimony synergistic reaction by hundreds of times and reduced the "ignition delay" of the reaction initiation to almost zero, providing instant, full, and explosive gas-phase flame retardant protection for high-end polymers in the event of extreme thermal shock.

Core strengths

1. monodisperse nanoscale quality and precise control

-The average particle size D50 is 20-100nm (customizable with ultra fine specifications of 10-50nm), with a particle size distribution span of ≤ 0.15 μ m, a monodispersity index of ≥ 0.92, no secondary aggregates, and a specific surface area of up to 50-80m ²/g, far exceeding similar products in the industry.

-The main content of Sb₂O₃ ≥ 99.99%, key impurities As₂O₃ ≤ 0.005%, PbO ≤ 0.01%, Fe₂O₃ ≤ 0.002%, to prevent the migration of harmful substances and meet the strict purity requirements of electronic grade, food contact grade, and medical grade materials.

-The whiteness is ≥ 99.5, the proportion of cubic crystals is ≥ 99.2%, the crystal morphology is regular spherical, and the surface hydroxyl content is precisely controlled at 0.8-1.2mmol/g, providing ideal reaction sites for subsequent modification.

-Adopting the vacuum inert gas gradient drying process, the moisture content is ≤ 0.06%, the powder has excellent flowability (angle of repose ≤ 32 °), and there is no agglomeration phenomenon during long-term storage. The deviation of physical and chemical indicators between batches is ≤± 0.02%.

2. In situ modification technology breaks through the bottleneck of synergistic efficiency

-The innovation adopts a synchronous in-situ process of "growth modification", introducing a composite modification system of polyethylene glycol (PEG) and silane coupling agent (KH-570) during the formation of nanocrystalline nuclei. Through chemical bonding, a core-shell structure is constructed, which improves compatibility with matrices such as PP, PVC, and epoxy resin by 80%, completely solving the problem of dispersion instability caused by traditional post modification.

-It produces a super synergistic effect with halogen-free phosphorus based, nitrogen based, and expansion type flame retardants, rapidly forming a nano level dense carbon layer and a gas-phase free radical capture layer during combustion. The flame retardant rating can directly jump from HB level to UL 94 V0 level (0.8mm thickness), with a limit oxygen index (LOI) ≥ 40, smoke density rating (SDR) ≤ 40, and a 75% reduction in toxic smoke release.

-Under the same flame retardant requirements, the addition amount is reduced by 40% -50% compared to ordinary antimony trioxide and 20% compared to conventional nano products, significantly reducing material density and formulation costs, and retaining a retention rate of ≥ 95% for substrate tensile strength and impact toughness.

-It integrates multiple functions such as smoke suppression, anti dripping, and anti-static, with a resistivity controlled between 10 ⁷ -10 ⁹Ω· cm. It can replace specialized anti-static additives and simplify the formulation system.

Application scenarios

In the field of new energy batteries

-Application: Power battery pack casing, lithium battery separator coating, electrolyte additive, flame retardant components for energy storage equipment

-Advantages: Monodispersibility ensures coating uniformity, flame retardant efficiency adapts to safety requirements of 800V high-voltage platforms, and as an electrolyte additive, can increase battery cycle life to over 4000 times

-Recommended dosage: 2% -5% (diaphragm coating)/0.05% -0.1% (electrolyte)/5% -10% (shell material)

5G Electronics and Semiconductor Field

-Applications: 5G base station antenna covers, semiconductor packaging materials, flexible circuit boards, and micro electronic component casings

-Advantages: Nanoscale particle size does not affect the dielectric properties and signal transmission efficiency of materials, high purity avoids impurities from interfering with chip operation, and adapts to the needs of high-frequency and miniaturized electronic devices

-Recommended dosage: 1% -4% (packaging material)/3% -7% (electronic casing)/2% -5% (flexible circuit board)

High end architecture and building materials field

-Application: Transparent flame-retardant glass, ultra-thin fireproof coating, flame-retardant insulation board, elevator decorative panel

-Advantages: High whiteness, high transparency (transmittance ≥ 90%), does not affect the appearance design of building materials, ultimate oxygen index ≥ 38, meets the highest fire rating requirements of the EU CPR building regulations

-Recommended dosage: 4% -10% (fireproof coating)/6% -12% (transparent flame-retardant material)/8% -15% (insulation board)

Special materials field

-Applications: Medical PVC pipes, food packaging films, aerospace composite materials, polyester polymerization catalysts

-Advantages: Low impurities and high dispersibility meet the safety requirements of medical and food contact materials. As a catalyst, it can improve polyester polymerization efficiency by more than 18% and reduce catalyst usage by 50%

-Recommended dosage: 2% -5% (medical materials)/3% -8% (aviation composite materials)/0.08% -0.15% (catalytic field)

If you are looking for nano antimony trioxide and nano level flame retardant synergists, Taixing will be your best partner and we will offer the most favorable cooperation price!