| 摘要 |
PURPOSE:To make it possible to conduct the annealing of a cold rolled steel plate without degreasing, by making use of esterification products of rosin, disproportionated rosin, hydrogenated rosin or polymerized rosin as a cold rolling oil of a steel plate to simultaneously enhance lubricity and steel plate surface cleaning property (mill cleaning property). CONSTITUTION:The title oil contains at least one member selected from among esterification products of rosin, disproportionated rosin, hydrogenated rosin and polymerized rosin. Preferable examples of these esterification products include products of monoesterification with a monohydric aliph. alcohol and a glycol ether; products of diesterification with a glycol; and products of triesterification with glycerin, trimethylolethane, trimethylolpropane, triethanol amine, and tripropanolamine. |
