PROCESS FOR PREPARING LOW MOLECULAR WEIGHT POLYACRYLIC ACIDS WITH NARROW MOLECULAR WEIGHT DISTRIBUTION IN A TUBULAR REACTOR

摘要

Polyacrylic acids with a low molecular weight and narrow molecular weight distribution are prepared by polymerising an aqueous solution of acrylic acid in a tubular reactor to which steam is fed in the presence of H2O2 and hydroxylammonium sulphate as starter system. These polymers may be used as pigment dispersants.