▎ 摘　　要

NOVELTY - A composite heat stabilizer contains 20-50 phr dihydroxy composite metal hydroxide, 40-60 phr zinc stearate, 10-20 phr organic tin compound, 10-25 phr auxiliary heat stabilizer, 3-8 phr graphene, 5-10 phr coupling agent, 5-20 phr lubricant, and 1-6 phr antioxidant in which dihydroxy composite metal hydroxide is magnesium-aluminum-zinc hydrotalcite or magnesium-aluminum hydrotalcite and coupling agent is silane coupling agent or titanate coupling agent. USE - A composite heat stabilizer for antistatic transparent PVC product (claimed). ADVANTAGE - Heat stabilizer is non-toxic, low in price, and, environment-friendly, has good thermal stability, antistatic property, and transparency, and improves thermal stability of PVC.