Increased Flame Retardant, Smoke Suppressant and Mechanical Properties of Semi-Rigid Polyvinyl Chloride (PVC) Treated with Zinc Hydroxystannate Coated Dendritic Fibrillar Calcium Carbonate

Zinc hydroxystannate (ZHS) coated dendritic fibrillar calcium carbonate (ZHSCC-(D)) and ZHS coated cubic calcium carbonate (ZHSCC(-C)) were prepared in the water solution of cetyl trimethyl ammonium bromide (CTAB)/glycerin and in a pure water solution, respectively. Compared with the semirigid polyvinyl chloride (PVC) treated with ZHSCC(-C), when the addition level and the effective flame retardant component of ZHS were the same, the semi-rigid PVC treated with ZHSCC(-D) showed a higher value of tensile strength, elongation and impact strength, and a lower smoke density rating (SDR) value than those of the semi-rigid PVC treated with ZHSCC(-C); except for the semi-rigid PVC treated with 10g ZHSCC(-C) (1:10) or ZHSCC(-D) (1:10) per 100g PVC, the semi-rigid PVC treated with ZHSCC(-D) had almost the same LOI value as that of the semi-rigid PVC treated with ZHSCC(-C). The semi-rigid PVC treated with 10g ZHSCC(-D) (1:10) per 100g PVC had the best integrated properties.