Coatings is prepared with propane diamine modified shell-lac as main raw material. Results of salt - spray test show that anticorrosion performance of these coatings has been improved a lot.
以丙二胺改性天然虫胶为主要原料的涂料用于铜表面，通过盐雾实验表明：其防腐蚀性能得到很大的提高。
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Solvent for paints lacquers shell-lac inks adhesives dyestuff cellulose acetate nitro-cellulose ethyl cellulose etc can also be used in metal cleaning it is also a raw material for chemical synthesis.