The novel hydrophilic monomers trimethylolpropane phthalate esters (TMPPs)

trimethylolpropane monoesters of maleic acid (TMPMs) and trimethylolpropane succinic monoester(TMPSs) were synthesized by esterification of trimethylolpropane(TMP) with phthalic anhydride(PA)

maleic anhydride(MA) and succinic anhydride(SA)

respectively. Then the anionic/non-ionic aqueous polyurethane dispersions (PUD) were synthesized by the prepolymer process using the novel hydrophilic monomers and polyoxyethylene ether (YmerTM N120) as compounding hydrophilic component. The effects of the type of hydrophilic monomers and mass ratio of TMPPs/N120 on the chemical resistance

hardness

mechanical properties and thermal stability of PUD films were studied. The storage stability

film hardness

water-and alcohol-resistance of PUD prepared from TMPPs were better than those from TMPMs and TMPSs. With increasing TMPPs/N120 mass ratio

the tensile strength of PUD film increased

elongation at break decreased

PUD film hardness increased and alcohol-resistance became good

while PUD solids contents decreased. The optimal mass ratio of TMPPs and N120 ranged from 6:5 to 4:8. Compared with DMPA

TMPPs could improve the hardness and thermal stability of PUD films

and significantly strengthened stain resistance

including resistance to ink

coffee

tea and wine. Therefore

TMPPs is a good hydrophilic compound to prepare PUD.