Using diamine and bis(six-membered ring carbonate) (bcc) as raw materials, amino-terminated polyhydroxy polyurethane (nphu) prepolymer was synthesized; further using dialdehyde starch (das) as the main raw material, Schiff base reaction was performed with nphu prepolymer to synthesize dphu adhesive. Two. Therefore, this study used das, bis(six-membered ring carbonate) (bcc) and diamine as raw materials to prepare a starch-based non-isocyanate polyurethane (DPHU) adhesive with high biomass content under catalyst-free and solvent-free conditions, with the aim of making starch. Acrylic pimaric acid diglycidyl ether (ae) was synthesized from the rosin derivative acrylic pimaric acid (apa) as raw material, and acrylic pimaric acid cyclic carbonate (ac) was further prepared by using the cyclic carbonate group in ac with polyethyleneimine (pei) and polyester polyamine.
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Compared with polyurethane adhesives prepared using isocyanates, bio-based nipu adhesives can not only reduce resource consumption but also reduce environmental pollution. The research results of this article will help promote the development and promotion of bio-based nipu polymers. Abstract A solvent-free two-component PU (polyurethane) adhesive was prepared using polyether polyol (n303), calcium carbonate, dioctyl phthalate (DOP) and other additives as the a component, polymethylene polyphenyl isocyanate (polymerized MDI) and monofunctional isocyanate as the b component.
