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 ß 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.