Abstract:

In order to prepare bifunctional waterborne polyurethane fabric coating agent, a series of hydrostatic pressure resistant and flame retardant water-borne polyurethane(OWPU) were synthesized by polyaddition reaction via an acetone process, in which N330 was used as macromolecular crosslinking agent, PTMG 2000 and ExolitOP550 as mixing soft segments, DMPA as hydrophilic chain extender, BDO as hard segment regulator and TDI as hard segment. The structure, thermal property and flame retardancy of prepared OWPU were characterized by FTIR, TGA and LOI. In addition, hydrostatic pressure resistant property were examined by hydrostatic pressure test.The results indicate that the incorporation of ExolitOP550 makes flame retardant performance become better, with more char residue and a increase of LOI from 21.8 to 29.0, meanwhile, the hydrostatic pressure of PU still keep above 8 kPa. Thus, a bifunctional fabric coating agent which has good flame retardant and hydrostatic pressure resistant has been manufactured.

Key words: flame-retardant, hydrostatic pressure, waterborne bolyurethane, fabric coating agent