| 摘要 |
<p>PURPOSE:To obtain a deinking agent capable of deinking a waste paper such as crushed news to regenerated pulp having high whiteness and small residual ink content by using a specific compound as an essential component. CONSTITUTION:The objective deinking agent contains, as an essential component, a compound of formula (A is residue obtained by removing active hydrogen from a polyamine compound, polyalkyleneimine compound or their derivatives having e active hydrogen atoms; (x) is 2-4; (y) is 8-30; (Z) is 2 or mixture of 2 and 3; (b) is 0-30; (c) is 1-5; a part of (c) may be 0; the average equivalent number of CyH2yO is 0.2e to 5e based on one molecule; (d) is 1-100; (e) is 4-100; R is H, 1-22C alkyl, alkenyl or acyl). The average molecular weight of the deinking agent is preferably 5,000-500,000.</p> |
