Abstract:

Abstract: The acid-thinned and oxidized starch latex was obtained by adopting hydrochloric acid as catalyzer and ammonium persulfate as oxidant. Starch was acid-thinned and was oxidized meanwhile, which shortens reaction time and enhances reaction velocity. The optimum technology conditions obtained by analysis experiment of single element are: 35% of starch latex concentration, 1 h of reaction time, 0.5 molL^-1 of hydrochloric acid concentration, 55 ℃ of reaction temperature, 2.25% of amount for dry starch mass. Acid-thinned and oxidized starch has double properties of acid-thinned starch and oxidized starch. The reaction-product had good properties such as low viscosity, high concentration, low retrogradation and would be used to prepare for wood-adhesives.

Key words: Key words: corn starch, oxidized, acid-thinned, low retrogradation, high-concentration and low-viscosity