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一、基本原理现有铸造用的涂料大致分为水基涂料和醇基涂料两种。水基涂料涂刷后需要烘干,以有机溶剂为载体的各种快干或自干的醇基涂料虽在某些方面避免了水基涂料的缺点,但在生产成本、安全生产和流变性能等方面依然不够理想。这里介绍的新型涂料是以乳状液理论为基础,并考虑到:水溶性粘结剂一般比醇溶性和油溶性粘结剂要便宜,应尽可能使用水溶性粘结剂;而要缩短涂料层的干燥时间,需选择比水的蒸发速度快的有机溶剂;油与水的交融需
First, the basic principle of the existing foundry casting can be divided into two kinds of water-based coatings and alcohol-based coatings. Water-based coatings need to be dried after brushing. Various quick-drying or self-drying alcohol-based coatings using organic solvents as carrier have avoided the disadvantages of water-based coatings in some aspects. However, in production costs, safe production and rheology Performance and other aspects are still not ideal. The new coatings presented here are based on emulsion theory and take into account that water-soluble binders are generally cheaper than alcohol-soluble and oil-soluble binders and water-soluble binders should be used whenever possible; to shorten the coating layer Of the drying time, the need to choose faster than the evaporation of water, organic solvents; blend of oil and water required