Title: Preparation process of anion-type water-thinned polyurethane for tanning
Application Number: 91108102 Application Date: 1991.07.08
Publication Number: 1068343 Publication Date: 1993.01.27
Approval Pub. Date: Granted Pub. Date: 1996.05.29
International Classifi-cation: C08G18/06,C14C3/22
Applicant(s) Name: Jiangsu Chemical College Address: 213000
Inventor(s) Name: Fu Rongxing, Li Jian
Attorney & Agent: XI SHENGYUAN
Abstract:
     In this invention, vegetable oil modified polyhydric alcohol is reacted with excess poly-isocyanate, and a prepolymer of polyurethane with end group of isocyanate is formed. Then the molecule chain is expanded by polyethylene-polyamine and halohydrin cyclic anhydrous ester anhydride, and is neutralized with water solution of alkali. By emulsifying and desolventizing, aqueous anionic reactive polyurethane is obtained. The product of this invention is applicable to tanning, filling, dying, colour fixation and decorative coating of leather, and the loose surface of leather may be overcome.
Time: 13