Tanning properties of reaction product of cyanuric chloride and glucosamine
N,O-di-(4,6-dichloro-1,3,5-triazinyl)-glucosamine(CG)was synthesized from cyanuric chloride and glucosamine,characterized by FTIR and 1HNMR,and then used for tanning.Taking delimed and softened sheepskin as example,the proper tanning conditions determined by single factor experiments were as follows:CG dosage 7.5%(based on the mass of the limed skin,the same below),tanning step temperature control mode of 30,40 and 45℃with tanning time 1,1.5,and 2 h,respectively.The results showed that the shrinkage temperature of the CG tanned crust leather,delicate and soft,could be as high as 78.9℃.Moreover,the GC tanned crust leather could be easily dyed,with the dyed crust leather exhibiting excellent hygiene as well as physical and mechanical properties.
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