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桐油沥青防水油膏是一种嵌缝用的防水材料。1969年开始推广使用,最长的已有四年时间,使用效果良好。这种油膏性能合乎要求,原材料易买到,成本低,生产设备简单,操作方便,容易掌握。既适于现场配制,也可以集中生产,长期保存,远距离运输不会变质。一、原材料1.桐油桐油是我国的特产,西南各省产量丰富。它是一种重要的干性油,主要成分是桐油酸的甘油脂。桐油能耐碱、耐油、耐大气腐蚀,有良好的抗水性。同时,由于桐油富有弹性和结膜性好,施工后的油膏表面结一层膜,保护了内部油膏的粘结性和柔韧性,使其能承受基层的伸缩变形。根据有关资料及我们的实践,炼聚合桐油分低温及高温两种方法。在232℃以下,基本上无任何变化;在270℃左右时,约需10分钟就胶化;在240～260℃时,约半小时才能胶化。加入树脂会阻止桐油的胶化时
Tung oil bitumen waterproof grease is a waterproof material for caulking. Since 1969, it has been popularized and used for the longest period of four years. The use effect is good. The ointment performance meets the requirements, raw materials are easy to buy, the cost is low, the production equipment is simple, the operation is convenient, and it is easy to grasp. Not only suitable for on-site preparation, but also concentrated production, long-term preservation, long-distance transport will not degenerate. First, raw materials 1. Tung oil Tung oil is a special product of our country, southwest provinces are rich in production. It is an important dry oil, the main ingredient is glycerol oleic acid. Tung oil is resistant to alkali, oil, atmospheric corrosion and has good water resistance. At the same time, due to the rich elasticity and conjunctival properties of the tung oil, the surface of the ointment after construction forms a film, which protects the adhesiveness and flexibility of the internal ointment and enables it to withstand the stretching deformation of the base layer. According to the relevant information and our practices, Tung oil is divided into two methods, low temperature and high temperature. Below 232[deg.] C., there is essentially no change; at about 270[deg.] C., it takes about 10 minutes to gel; at 240-260[deg.] C., it takes about half an hour to gel. Adding resin will prevent the tung oil from gelling