Method for preparing protein retanning filler by utilizing aziridine crosslinking agent

• Main Authors: LIAO XUEPIN, FAN CHAOYUN, SHI AILIANG, HUO WENKAI, SHI BI
• Format: Patent
• Language: Chinese; English
• Published: 07.06.2019
• Subjects: AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G; APPARATUS THEREFOR; CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING,IMPREGNATING, FINISHING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS FOR TANNING; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DERIVATIVES OF NATURAL MACROMOLECULAR COMPOUNDS; GENERAL PROCESSES OF COMPOUNDING; HIDES; LEATHER; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PELTS; SKINS; THEIR PREPARATION OR CHEMICAL WORKING-UP; WORKING-UP

The invention discloses a method for preparing a protein retanning filler by utilizing an aziridine crosslinking agent. The method comprises the following steps: 1, stirring 50-150 parts by mass of hydrolyzed collagen and 50-300 parts by mass of water at a room temperature for dissolution for 30-90 min to obtain a mixed hydrolysate; and 2, adding 0.5-7.5 parts by mass of gallic acid and 2-20 partsby mass of the aziridine crosslinking agent into the mixed hydrolysate prepared in the step 1, and performing a reaction for 2-8 h under stirring under temperature condition of 30-80 DEG C, so as toobtain the cationic protein-based retanning filler. The method provided by the invention utilizes the aziridine crosslinking agent and the hydrolyzed collagen to prepare the protein-based retanning filler, a novel amino group is introduced while an original carboxyl group in protein is consumed during the reaction, so that the cationicity of the product can be improved, and absorption of a subsequent dyeing fatliquoring ma