Zinc Hydroxy Stannate (ZHS) is a multifunctional, inorganic smoke suppressant and synergist, similar to Zinc Stannate but with hydroxyl groups that offer unique activity.

Flame Retardant Mechanism ZHS also functions in the condensed phase to reduce smoke:

1. Char Promotion: Like ZS, it promotes the formation of a stable, insulating char layer by catalyzing cross-linking in the polymer.

2. Acid Scavenging: The hydroxyl groups can aid in the early-stage trapping of HCl from PVC decomposition, preventing it from auto-catalyzing polymer degradation (unzipping) and thus suppressing smoke formation at its source.

3. Synergy: It works synergistically with Zinc Borate and can be used to reduce levels of Antimony Trioxide.

Key Application Areas

• Flexible PVC: Widely used in wire & cable compounds, flooring, and coated fabrics.

• Halogenated Systems: Effective in any halogen-containing polymer or formulation where smoke suppression is a key objective.