Sodium Antimonate
Grade
SA-A,AF
Sodium antimonate, like antimony trioxide, is used as a synergistic flame retardant in halogenated plastic formulations. In addition, it contributes to improved pigment coloration in various synthetic resins, as well as enhanced heat resistance and hydrolysis resistance in engineering plastics.
Compared to antimony trioxide, sodium antimonate has a refractive index closer to that of many transparent resins, which helps maintain transparency when compounded. This property also enhances the brightness and vividness of coloration in colored resins.
In engineering plastics that require high thermal resistance, antimony trioxide may cause degradation of resin properties through depolymerization. As a pentavalent antimony compound, sodium antimonate provides excellent flame retardancy while maintaining the resin’s inherent heat and hydrolysis resistance without negatively affecting material properties. Although the presence of crystal water or adsorbed moisture in sodium antimonate may induce hydrolysis in engineering plastics, our products—SA-A and SA-AF—are manufactured using proprietary calcination technologies that effectively eliminate such moisture.
Both SA-A and SA-AF are fine powder grades with excellent dispersion, made possible through advanced particle size control and removal of coarse particles. SA-A is controlled to a particle size of 10 µm or less, while SA-AF is controlled to 3 µm or less.
SA-A
Standard grade: NaSbO3 ≥ 98%, particle size ≤ 10 µm
Packaging: Inner aluminum-laminated moisture-proof bag + outer kraft paper bag
SA-AF
Standard grade: NaSbO3 ≥ 98%, particle size ≤ 3 µm
Packaging: Inner aluminum-laminated moisture-proof bag + outer kraft paper bag
Technical Data
SA-C
SA-C is a hydrated form of sodium antimonate, designed as a clarifying agent (defoaming and decolorizing agent) for high-grade glasses such as optical glass. While antimony trioxide is commonly used as a defoaming agent in glass, sodium antimonate also provides oxidizing decolorization in addition to defoaming performance.
Standard grade: NaSbO3・3H2O ≥ 98%