The invention discloses a technological method for preparing water-soluble low-crosslinking
polymaleic anhydride-diisobutylene
copolymer salt dispersant. According to the dispersant, a third
monomer is added as a cross-linking agent for achieving light crosslinking of a
system in the
polymerization process, and the
usability of the
polymerization system is upgraded. The technology that
saponification is conducted immediately after the
polymerization,
organic solvent is removed through the oil-water separation and membrane separation technologies, the defects that in a traditional technology, namely polymerization,
distillation and
saponification, energy is consumed and the efficiency is low are avoided, the preparation process is simplified, and the preparation efficiency is remarkably improved. The dispersant obtained through the method has the advantages that the water
solubility and light crosslinking characteristic are achieved simultaneously, and the crosslinking degree reaches 16.8%-22.7%; the
operating temperature is raised, and the glass-
transition temperature of
polymer reaches 78.5 DEG C-82.5 DEG C; the dispersion force of the
system is 95-130 mg / MnO<2> per 100 ml of sample solutions, wherein the concentration of the sample solutions is 0.025%. Therefore, the water-soluble low-crosslinking
polymaleic anhydride-diisobutylene
copolymer salt dispersant has a good application prospect in such fields as solution polymerized
styrene-butadiene rubber,
coating dispersion technology and
leather tanning agent dispersion technology.