| 1. | In the synthesizing process , the ph value in hydroxymethylated stage , the reaction time , temperature and the moore ratio of sodium bisulfate to melamine in the sulfonated stage , and die ph value in the condensation stage , are important factors influencing on the performance of jd 在合成过程中,羟甲基化阶段的ph值,磺化阶段的ph值、时间、温度和投料摩尔比,缩合阶段的ph值等对减水剂性能影响显著。 |