一种ABS抗氧剂乳液的制备方法

A Preparation Method of Antioxidant Emulsion for ABS

以油酸钾为乳化剂、对甲酚和双环戊二烯丁基化产物CPL为主抗氧剂、硫代二丙酸二月桂酯(DLTP)为辅抗氧剂,采用反向乳化法制得不同粒径、配比和固含量的抗氧剂乳液,并对其进行Zeta电位、表面张力和稳定性测试,然后将乳液加入丙烯腈-丁二烯-苯乙烯接枝共聚物(ABS胶乳)中进行耐老化性能测试。结果表明:采用反相乳化法可制得高效稳定的抗氧剂乳液。对于同配比的抗氧剂乳液,其粒径分布越窄,乳液稳定性越好。抗氧剂乳液的分散程度与主辅抗氧剂的配比共同决定着氧化诱导时间,而氧化诱导温度仅取决于主辅抗氧剂配比。

Using potassium oleate as emulsifier, reaction products CPL of p-cresol and dicyclopentadiene and isobutylene as the main antioxidant, dilauryl thiodipropionate(DLTP) as auxiliary antioxidant, the antioxidant emulsions with different particle size, propotion and solid content were prepared by inverse emulsification method. The Zeta potential test, surface tension analysis and stability test of the antioxidant emulsion were carried out, then the antioxidant emulsion was added into the acrylonitrile-butadiene-styrene copolymer(ABS latex) for aging test. The results show that the inverse emulsion method can produce high-efficiency and stable antioxidant emulsion. For the same ratio of antioxidant emulsion, the narrower the particle size distribution, the better the emulsion stability. The degree of dispersion of the antioxidant emulsion together with the ratio of the primary and secondary antioxidants determine the oxidation induction time, while the oxidation induction temperature only depends on the ratio of main and auxiliary antioxidants.