Preparation of Sodium Polyacrylate Dispersant and Its Application

Low-molecular weight sodium polyacrylate were synthesized by solution polymerization using water as solvent,K_2S_2O_8-NaHSO_3 as redox initiator and NaHSO_3 as chain-transfer agents,and the optimum experimental conditions were investigated.The results showed that the low-molecular weight sodium polyacrylate from 2 000 to 4 000 were obtained when reaction temperature was 70 ℃,acrylic acid mass fraction was 20 %～30 %,the mass ratio of potassium persulphate to sodium hydrogen sulfite was 10∶1～14∶1,and reaction time was 5 h.Sodium polyacrylate synthesized was used in the ceramic ferrous powder.The results shown that smaller viscosity and better dispersion effects were achieved when sodium polyacrylate mass fraction was 0.3 %～0.5 %.