| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a de-inking agent for regenerating waste paper, capable of efficiently removing the ink from pulp fibers and giving regenerated pulp high in whiteness and little in the left ink. SOLUTION: This de-inking agent for regenerating waste paper contains an enzyme and a compound of the formula: R<1> O-(PO)x -[(EO)y -(AO)z ]-R<2> , wherein R1 is a 8-24C linear of branched alkyl or alkeny2; R<2> is hydrogen or a 2-24C acyl; PO is a propylene unit; Eo is an ehtylece unit; AO is a >=3C alkylene oxide unit; (x) and (z) are each a positive integer of >=1, and 10<=(x)+(z)<=100; (y) is a positive number satisfying: 10<=(y)<=100; the addition from of PO is a block form; the addition forms of EO and AO are each a block form or a random form.</p> |
