Starch adhesive

resistivity against water

Congratulations to Liang, Zhang and Zhang.

(Hefei University of Technology, Hefei 230009)

With toluene diisocyanate (TDI) and epichlorohydrin as crosslinking agents, oxidized starch was modified by two-step crosslinking method, and the quality of oxidized starch was improved.

Starch adhesive

Water resistance. The experimental results show that the water-resistant time of starch adhesive can be increased from 0.4h to 20h under weak alkaline conditions by crosslinking oxidized starch with 0.8% TDI and then crosslinking with 1.0% epichlorohydrin. Between the two steps of cross-linking modification, the viscosity of the system can be reduced by moderately oxidizing and degrading starch molecules with 1.0% ammonium persulfate (APS).

Key words: starch adhesive; Crosslinking; TDI epichlorohydrin; resistivity against water