Patent ID: 8002846
Filing Date: 2011-08-23
Classification: C08H,C08L,C14C

Abstract:
1. A method for manufacturing a protein filling agent for leather utilizing animal hairs, comprising the steps of: (1) pre-treating the animal hairs to obtain pre-treated animal hairs, wherein the pre-treating comprises washing the animal hairs with water, soaking the animal hairs in a sufficient volume of 0.01-0.5 M of inorganic acid solution for 10-48 hours, washing the animal hairs with water until the animal hairs have a neutral pH level, obtaining 600 part by weight of the animal hairs to soak in a sufficient volume of 2-30 wt % of reducing agent for 10-48 hours; and draining off the water from the animal hairs, subsequently; (2) adding the pre-treated animal hairs of the step (1) to a reactor with a stirrer, thermometer, and reflux condenser to soak in a sufficient volume of 0.5-20 wt % of alkaline solution at 50-95° C. for 2-20 hours to obtain a viscous liquid; and (3) cooling the viscous liquid of the step (2) and adjusting the pH level to 5-8 by an inorganic solution to obtain a filtrate of 10-20% solid content with keratin, and concentrating and drying the filtrate to obtain a protein filling agent for leather.