Patent ID: 6399715
Filing Date: 2002-06-04
Classification: C08G

Abstract:
A succinimidcopolymer produced by a solution polymerization method which comprises the steps of:forming in a cyclic carbonate solvent a substantially liquid reaction mixture constituted by aspartic acid, a copolymerizable monomer soluble in the solvent and having a functionality of at least 2, and at least one catalyst; heating said reaction mixture to an elevated temperature sufficient to produce a heated reaction mixture and to effect solution polymerization of said aspartic acid with said monomer, said temperature being below the boiling point of said cyclic carbonate solvent; and maintaining the heated reaction mixture at said reaction temperature until a succinimide copolymer product is formed; and characterized by having a weight average molecular weight in the range of about 200 to about 50,000.