Direct polyaspartate synthesizing process catalyzed by aspartic acid precursor


Application Number: 00105150
Application Date: 2000.04.11
Publication Number: 1267673
Publication Date: 2000.09.27
Priority Information:
International: C08F122/02
Applicant(s) Name: Tianjin Univ.
Address:
Inventor(s) Name: Wang Yaquan
Patent Agency Code: 12201
Patent Agent: ren yan
Abstract Ammonium salt or diammonium salt of maleic acid or fumaric acid as material is synthesized into polyaspartate directly at 120-370 deg.c in the presence of inorganic acid, the alkali metal salt or ammonium salt of inorganic acid or benzene sulfonate acid as catalyst. The polyaspartate of the present invention has large molecular weight, which is controllable in 500-100,000 by controlling the amount of added catalyst. The present invention has simple technological process, low production cost and wide range of product application.