ON THE STUDY OF A PV FAST MAROON HFM PIGMENT BASED POLYURETHANE IONOMER

PV Fast Maroon HFM based polyurethane ionomers were successfully synth esized at our lab, and these ionomer structures have been proven by in frared spectra. In aqueous solution, the surface tension was found to be lower for the HFM pigment based polyurethane ionomer made by isopho rone diisocyanate (IPDI) than for the HFM pigment-based polyurethane i onomer made by toluene diisocyanate (TDI), as a result of more hydroph obicity adsorbed at the surface of aqueous solution. The viscosity dec reases with increasing the concentration of the HFM pigment used to pr epare the HFM pigment based polyurethane ionomer, indicating that the structure of this ionomer is possibly considered to be a type of micel le. In addition, the number-average particle sizes are seen to be decr eased with increasing the concentration of HFM pigment employed for ma king the HFM pigment based polyurethane ionomer. These results also su ggest that the HFM pigment based polyurethane ionomer molecule could h ave a micelle-like structure. However, the 100% modulus property for b oth the IPDI type or the TDI type of PV Fast Maroon HFM based PU ionom er molecules appears to increase gradually with increasing the concent ration of HFM, as a result of more crosslinking formed. (C) 1996 John Wiley & Sons, Inc.