Effect of Borate Groups on the Properties of Rigid Polyurethane Foams Obtained with Using Hydroxypropyl Derivatives of Urea

Abstract

By using hydroxypropyl derivatives of urea esterified with boric acid as polyol components and 4,4'-diphenylmethane diisocyanate the rigid polyurethane foams have been obtained. The influence of boron and nitrogen atoms on the properties of foams, inter alia compressive strength and flammability, has been discussed. The presence of borate groups enhances the compressive strength of polyurethane foams meaningfully. However, the flammability of foams is determined by the participation of carbamide groups mainly.

Improving the structural and physical properties of boric acid-doped rigid polyurethane materials

“…In addition to, flammability properties of PU will determine with added carbamide. 6 In the continuation study examining the effect of carbamide and borate groups on the characterization of PU foams, Zarzyka applied FTIR, elemental analysis, thermogravimetric analysis, differential scanning calorimetric analysis, oxygen index, horizontal flammability test, and thermal conductivity tests in the PU characterization. Comparing boric acid-added and PURE PU, boric acid-added PU showed high density, lower water uptake, better thermal, and dimensional stability.…”