Provided is a method of preparing a powdery diacetal clarifying agent, which comprises mixing an aromatic aldehyde, a polyol, and an acid catalyst in an organic polar solvent, adding a hydrogenating agent and an inorganic silicon-containing agent into the foregoing mixture, and filtering the mixture. The powdery diacetal clarifying agent prepared by the method can have excellent flowability, dispersability, thermal resistance, and color stability. Accordingly, the powdery diacetal clarifying agent does not release stinking odor and incur yellowing at high temperature, allowing the plastic articles to have improved appearance and visual appeal.
提供的是一种制备粉状双
缩醛澄清剂的方法,包括将芳香醛、多元醇和酸性催化剂混合在有机极性溶剂中,向上述混合物中加入氢化剂和无机含
硅剂,并过滤混合物。通过该方法制备的粉状双
缩醛澄清剂可以具有优异的流动性、分散性、热稳定性和色彩稳定性。因此,该粉状双
缩醛澄清剂在高温下不会释放难闻的气味和发黄,使塑料制品具有更好的外观和视觉吸引力。