The polyethoxylated lanolin can be prepared by two steps of esterification first the lanolin was reacted with maleic anhydride to form single ester and second the product was esterified with polyglycol(M=1200) to prepare the polyethoxylated lanolin.
由马来酸酐与羊毛脂反应 ,形成单酯 ,再将其与聚乙二醇反应 ,得到聚乙二醇酯化羊毛脂。
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