D1821对织物白度有较大的影响，而酯基季铵盐对织物白度的影响不大。
D1821 has a remarkable adverse effect on fabric whiteness as opposed to esterquats.
介绍了阳离子表面活性剂在织物柔顺剂市场的应用，尤其是环境友好型的酯基季铵盐的性能及应用。
The application situation of cationic surfactant in textile softener, especially the application and properties of the esterquats were introduced.
结果表明：单酯基季铵盐、双酯基季铵盐和三酯基季铵盐易生物降解，13天后降解度都在90%以上；
The results showed that EQ could be biodegraded readily and completely. More than 90% EQ can be degraded in 13 days.
结果表明：单酯基季铵盐、双酯基季铵盐和三酯基季铵盐易生物降解，13天后降解度都在90%以上；
The results showed that EQ could be biodegraded readily and completely. More than 90% EQ can be degraded in 13 days.
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