Lamiban A (in which R ′ and R″ are hydrocarbon groups containing 65,438+0 ~ 6 carbon atoms) is often used as detergent, emulsifier, diffuser, metal cleaner and skin cleaner in textile sectors such as wool spinning, silk, synthetic fiber and printing and dyeing industry. Because the chemical structure of polypeptide is similar to that of protein, it has low irritation and can protect skin well. When used for washing protein fiber fabrics such as silk and wool, it has the advantages of softness, luster and elasticity. It has strong emulsifying power. For example, 22 parts of Remibon A can emulsify 1000 parts of vegetable oil. But also has strong dispersibility to calcium soap. It is stable in neutral and alkaline media and has good detergency in alkaline media. But it will precipitate in the form of precipitation in the medium with pH less than 5. Because of its strong hygroscopicity, it is usually not made into powder products, and it is a yellow-brown viscous liquid product on the market, with an active substance content of 32% ~ 40%. The raw materials for making the multi-skinned part of Remibon A come from scraps of protein, such as dander, silkworm chrysalis, pig hair, chicken feathers, bone glue, bean cakes, rapeseed cakes and so on. After hydrolysis, a hydrolyzed protein solution is obtained. Lamiban A is obtained by condensation of oleoyl chloride and sodium polyphosphate in hydrolyzed protein solution.