METHOD FOR PREPARING GREASE/TURPENTINE BASE LIQUID CALCIUM-ZINC COMPOSITE THERMAL STABILIZER FOR PVC USE

摘要

A method for preparing a grease/turpentine base liquid calcium-zinc composite thermal stabilizer for PVC use, comprising the steps of: 1), using industrial fatty acid and turpentine as raw materials to synthesize a grease/turpentine base composite dibasic acid through a Diels-Alder reaction; 2), uniformly mixing any two metallic compounds of zinc oxide, calcium hydroxide and calcium oxide with the grease/turpentine base composite dibasic acid and a solvent respectively, heating to 80-150 ℃, refluxing for 0.5-4 h, and distilling to remove the solvent at a vacuum degree of 1-2mmHg, so as to obtain the corresponding grease/turpentine base composite dibasic acid salts of the two metals; and 3), dissolving an appropriate amount of the grease/turpentine base composite dibasic acid salts of the two metals in a mixed solution of epoxidized soybean oil, an antioxidant, liquid paraffin, phosphite ester, β-diketone and the like, and filtering to obtain a grease/turpentine base liquid calcium-zinc composite thermal stabilizer. The prepared grease/turpentine base liquid calcium-zinc composite thermal stabilizer is used in the field of PVC plastic processing, and employs renewable natural grease resources as main raw materials; the product has good thermal stability and essentially no toxicity, and is environmentally friendly and highly cost-effective.