| 摘要 |
<p>PURPOSE:To obtain a binder to give such a toner that has excellent electrification stability, causes no change of image density nor fog, and has a little amt. of scattering and consumption in a copy machine by including an acid cleaning process and a hot water cleaning process after the polynm. process of the resin and repeating the hot water cleaning process. CONSTITUTION:The production method of a resin for a toner includes an acid cleaning process and a hot water cleaning process after the polymn. process of the resin. The hot water cleaning process is repeated. In the acid cleaning process, the resin slurry obtd. by a well-known production method of resin is dehydrated if necessary, to which acid is added to remove an inorg. powder used as a dispersant for suspension-polymn. The acid used is hydrochloric acid, sulfuric acid, nitric acid or the like, and nitric acid is preferable for handling. The acid cleaning is performed preferably for 10min to 3 hours. In the hot water cleaning, the dehydrated cake is cleaned with hot water in order to remove the decomposition product of a peroxide-base polymn. initiator such as benzoic acid. The hot water cleaning is performed preferably at 60-100 deg.C of the hot water for 1 to 4 hours. After dehydrating and filtering, hot water is added to perform hot water cleaning again.</p> |
