Fast curing of polyhydroxyurethanes via ring opening polyaddition of low viscosity cyclic carbonates and amines

Abstract

Aliphatic cyclic carbonate monomers (CCs) with two or three functional groups and low viscosity were synthesized by solvent-free catalytic transcarbonylation of oxiranes and carbon dioxide with high conversions at atmospheric...

A Review of Bio-Based Adhesives from Primary and Secondary Biomass for Wood Composite Applications

“…Polycondensation (polyamides, phenolic adhesives and silicones) [19]; 3. Polyaddition (epoxides, polyurethane, and silicone adhesives) [21]. Such adhesives consist of fillers, monomers, catalysts, and other additives such as reaction accelerators or inhibitors that promote a slower and more uniform formation of polymers.…”

Biodegradable isocyanate-free polyurethane films via a noncatalytic route: facile modified polycaprolactone triol and biobased diamine as precursors

“…[11][12][13][14] In particular, isocyanate-free PU was obtained by the reaction of diamines/ diols with cyclic carbonate, the polyaddition of diamines with cyclic carbonates and rearrangement as well as ring-opening polymerization. 4,[15][16][17] In the isocyanate-free approach, researchers are intrigued to engineer sustainable or biodegradable synthons to convert into epoxides followed by CO 2 xation to form a cyclic carbonate prior to reaction with diamines. [18][19][20] Indeed, isocyanate-free PU are known to be non-toxic, impermeable, moisture-insensitive and adhesive with abrasive, wear and chemical resistant properties.…”

“…11–14 In particular, isocyanate-free PU was obtained by the reaction of diamines/diols with cyclic carbonate, the polyaddition of diamines with cyclic carbonates and rearrangement as well as ring-opening polymerization. 4,15–17…”

Effects of Poly(propylene glycol)‐Based Triamine on the Sol/Gel Curing and Properties of Hybrid Non‐Isocyanate Polyurethanes

“…[46] While most studies have focused on the synthesis of linear NIPUs from cyclic dicarbonates and diamines, some others used amine curing agents, such as triamines, to afford NIPU thermosets. [18,[50][51][52][53][54][55] In fact, poly(amines) induce branching which leads to the cross-linking of the NIPUs, [56] while enhancing their mechanical properties and their water resistance. [20] Hence, there is an opportunity to yield improvements to NIPU shortcomings faced previously by replacing the poly(propylene glycol)-based diamine with triamine analogs.…”