Achieving high levels of flame retardancy is paramount for ensuring the safety of materials used in demanding applications. Among the various fire safety standards, the VW-1 (Vertical Flame Test) is particularly rigorous, often required for materials in electronics, wire and cable, and aerospace components. While achieving this standard can be challenging, synergistic flame retardant systems offer a powerful and efficient solution. At NINGBO INNO PHARMCHEM CO.,LTD., we specialize in advanced antimony-based synergists that, when used in conjunction with halogenated compounds, reliably meet the VW-1 flame retardant grade.

The VW-1 test evaluates a material's ability to self-extinguish after being exposed to a direct flame. It requires that the flame does not spread downwards, that there is no flaming dripping, and that the afterflame and afterglow time are limited. Achieving this classification often necessitates a carefully formulated blend of flame retardant additives that work together to interrupt the combustion cycle effectively. Antimony compounds, particularly antimony trioxide and its advanced replacements like our synergists, are well-known for their ability to enhance the performance of halogenated flame retardants, creating the necessary synergy for VW-1 compliance.

Our antimony-based synergists are designed to work in concert with brominated or chlorinated flame retardants. In a fire scenario, the halogenated component releases halogens, which then react with the antimony synergist to form volatile antimony oxyhalides. These species act as free radical scavengers in the gas phase, disrupting the combustion chain reaction and cooling the flame. Simultaneously, in the solid phase, the antimony synergist promotes char formation, creating an insulating barrier that limits oxygen supply and the release of flammable gases. This dual action is key to meeting the stringent criteria of the VW-1 flame retardant grade.

The advantage of using a synergistic system is that it often allows for lower overall additive loadings compared to relying on a single flame retardant. This not only can lead to cost savings but also minimizes any potential negative impact on the physical properties or processing of the base polymer. Our synergists are also developed with environmental considerations in mind, adhering to ROHS and REACH regulations, and offering characteristics like low smoke generation and good dispersion. This ensures that compliance with safety standards does not come at the expense of environmental responsibility or material integrity.

For manufacturers requiring their products to meet the demanding VW-1 flame retardant grade, integrating our advanced antimony-based synergists into their formulations presents a highly effective and efficient strategy. NINGBO INNO PHARMCHEM CO.,LTD. is dedicated to providing innovative chemical solutions that enhance product safety and performance, enabling our clients to meet critical industry standards with confidence. The power of synergy is undeniable in achieving the highest levels of flame retardancy.