| 摘要 |
PURPOSE:To provide a gypsum material having good early strength property, water resistance and abrasion resistance and used for primer preparation and finishing materials. CONSTITUTION:100 pts.wt. of the mixture of a-type semi-hydrated gypsum: a cement in a weight ratio of 80:20 to 95:5 is compounded with a synthetic resin emulsion in a solid amount of 15-30 pts.wt. Since the composition permits to walk at approximately 2hr after the composition is kneaded and coated, a floor-finishing work can be performed without extremely disturbing the use of the floor due to the shortage of a work period and the shortage of an occupying time in the repairing work of the floor. |
