歧化松香钾皂制备方法的改进与性能研究

以歧化松香为主要原料,在较低的温度(75~95℃)下,溶入KOH水溶液,并进行皂化反应,制备固体份质量分数45%的歧化松香钾皂。研究了反应温度、皂化时间、pH值、添加复合助剂TX-A对反应速度、去氢枞酸钾含量,以及黏度、结晶、胶凝等产品性能的影响。得出歧化松香钾皂化的较佳制备条件为:pH值为10.36,皂化时间分别为120 min(未加TX-A)、98 min(加TX-A),反应温度85℃,TX-A加入量为反应物质量的0.2%。制备出的歧化松香钾皂产品,在性能上完全符合行业标准ZBB 72003-84的要求,并且结晶、胶凝性质有所改善,加纳色号标准降低两个等级。

Improvement on the Preparation and Performance Study of Potassium Soaps of Disproportionated Rosin

Potassium soaps of disproportionated rosin containing 45% total solids were prepared by dissolution of disproportionated rosin in potassium hydroxide solution at low temperature(75~ 95 oC)and then saponification.Effect of reaction temperature,pH value,saponification time and dosage of the compound addtive TX-A on the reaction rate,content of potassium dehydroabietate,viscosity,crystallization,gel formation and other properties of the product were studied.Suitable technological conditions were chosen as pH of 10.3,reaction time of 120 min(no addition of TX-A) or 98 min(addition of TX-A),reaction at 85 oC and TX-A of 0.2%(w/w).Properties of the product met the current professional standard ZBB 72003-84.In addition,the gel formation,crystallization and other properties were improved,and the color value was lowered by two grades.