Title:
MODIFIED POLYASPARTIC ACID
Document Type and Number:
Japanese Patent JP2002293931
Kind Code:
A
Abstract:
To provide a new method for producing a modified polyaspartic acid usable as an optical gloss agent.
(a) An unsaturated 4C dicarboxylic acid A is reacted with a nitrogen donor compound B to form a reaction mixture, (b) the reaction mixture is transferred to a reactor simultaneously with further addition of a nitrogen donor compound C, (c) the reaction mixture is treated at 120-350°C to form a polymer containing repeating succiny unit and aspartamide unit and (d) the obtained polymer is hydrolyzed with an aqueous solution of a basic compound D to form a polymer containing repeating aspartic acid unit and aspartamide unit.
Inventors:
KLEIN THOMAS
SCHMIDT HOLGER
CORDES MONIKA
KLUETSCH MANFRED
SCHMIDT HOLGER
CORDES MONIKA
KLUETSCH MANFRED
Application Number:
JP2002088418A
Publication Date:
October 09, 2002
Filing Date:
March 27, 2002
Export Citation:
Assignee:
BAYER AG
International Classes:
C08G73/10; D06L3/12; D06L4/614; D06L4/664; D21H17/54; D21H21/30; (IPC1-7): C08G73/10
Attorney, Agent or Firm:
Heiyoshi Odashima
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