4 years ago

Synthesis of hybrid polyhydroxyurethanes by Michael addition

Synthesis of hybrid polyhydroxyurethanes by Michael addition
The H-NIPU oligomers technology gives access to isocyanate-free polyurethanes mixing properties and reactivity of different reactants. The new hybrid H-NIPU materials were synthetized from PolyHydroxyUrethane (PHU) prepolymers terminated amines and acrylates compounds. To terminate the oligomers by amine with different chain length the cyclic carbonate (PPOBC640) was reacted with different excess of diamine (EDR-148 or CBMA). This excess of amine acts as a reactive diluent decreasing likewise the viscosity. Then, these aminotelechelic PHU oligomers were cross-linked at room temperature without solvent and catalyst thanks trimethylolpropane tris-acrylate (TMPTA) and different length of chain of poly(propylene oxide) bis-acrylate (PPOBGA). Different H-NIPU materials were obtained from a wide range oligomer of different molar masses and acrylates cross-linkers leading to new hybrid non-isocyanate polyurethane networks with various properties.

Publisher URL: www.sciencedirect.com/science

DOI: S0014305717313630

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