METHOD OF MAKING PROTECTIVE DECORATIVE COATINGS ON ASBESTOS-CEMENT ARTICLES

摘要

FIELD: process engineering.SUBSTANCE: invention relates to production of construction materials. Proposed method comprises application of dye powder on processed article and heat treatment. Protective decorative coating is performed in two layers. First layer is primer to be applied without preliminary heating. Second layer is made from polymer material and applied at temperature not exceeding 50 degrees Centigrade.Temperature of isothermal holding in heat-treatment chamber makes 175-205°C and 190-220°C. Holding time makes 10-25 min. Time of application of first and second layer makes 15-35 min.EFFECT: higher density, adhesion strength, smooth surface, uniform layers.5 cl