| 摘要 |
<p>PURPOSE: To obtain deinked pulp having a small remaining ink number and high whiteness from old paper. CONSTITUTION: This deinking agent comprises the below-cited components A and B. The component A is composed of an adduct of (a) anα,β-unsaturated dicarboxylic acid or its an anhydride and (b) a 3-36C unsaturated fatty acid or an ester containing at least one double bond in the molecule. The component B is a compound of the formula, RO (EO)k (PO)m (BO)n }H (R is H, methyl or ethyl group; EO is oxyethylene group; PO is oxypropylene group; BO is oxobutylene group, addition in } may be random or block, the molar ratio k:m:n=1:(0.2-1):(0-0.5) and k+m+n is 5-100).</p> |
