| 摘要 |
Polyol polyesters having reduced color content are prepared by base-catalyzed transesterification of pretreated lower (i.e., C1-C3) alkyl fatty esters with polyols. The pretreatment comprises the steps of contacting the alkyl fatty esters (in a liquid state) with an alkoxide base, separating undissolved solids from the esters, and then distilling the esters.
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