Study on Preparation of Protein Filler by Dicyandiamide Modified Keratin

• 1、Xingye Leather Technology Co., Ltd., Jinjiang 362261, China

Abstract：Dicyandiamide was used as functional monomer and formaldehyde was used as crosslinking agent to modify the keratin extracted from cow hair in leather-making industry, the IR spectra, particle size analysis and so on were used to characterize. And further preparation of leather special protein fillers, used for tanning filling process. Research shows that: When the mass ratio of keratin to dicyandiamide was 1: 0.5, The molar ratio of dicyandiamide to formaldehyde is 1: 3, The methylation time was 1 h, The copolymerization time was 0.5 h, the thickening rate of the modified protein filler is the highest. The protein filler was applied to the leather,when the amount of protein filler 10%, the resulting leather thickening rate of 41.8%, the grain was fine,the sensory proStudy on Preparation of Protein Filler for Tannery by Dicyandiamide Modified Keratinperties were soft and plump, physical and mechanical properties were fine.

Keywords： kkeratin Dicyandiamide modification protein filling