| 摘要 |
<p>PURPOSE:To obtain deinking agent for reclaiming old paper, providing deinked pulp having high b valve and a small amount of tacky material, comprising a substance prepared by adding ethylene oxide and propylene oxide to an ester mixture prepared by reacting natural fats and oils, etc., with a monohydric alcohol, as an active ingredient. CONSTITUTION:The aimed deinking agent comprising an ester mixture which is prepared by adding ethylene oxide(EO) and propylene(PO) in the molar ratio of EO/PO=1.8-2.2 to an ester mixture having 3-28 hydroxyl value in 10-100 number of mols of addition preferably by random addition, as an active ingredient. The ester molecular mixture is obtained by reacting natural fats and oils or a reaction product prepared by previously reacting the natural fats and oils with glycerin with a monohydric alcohol (e.g. octanol) in the molar ratio of the monohydric alcohol and glycerin in the natural fats and oils of (0.05/1)-(0.48/1).</p> |
