Preparation and properties of polyurethane adhesive derived from modified rubber seed oil and toluene diisocyanates

摘要

In this research, the polyurethane adhesive based on modified rubber seed oil with toluene diisocyanates was successfully synthesized in presence of DBTL catalyst. The chemical structure of modified rubber seed oil was characterized by ~1H-NMR. The suitable reaction time of the polyurethane adhesive synthesis was 4h by providing with FT-IR technique. The effects of NCO index and chain extender (1,4-butane diols) content in adhesive formulation as well as cure temperature were also studied by leather to leather on adhesion peel strength. It was found that the higher NCO index or chain extender content gave the higher adhesion of substrate. The cure temperature of adhesive at 70°C gave the better peel strength than that at 30°C during 24 h.