关键词:

磺酸盐聚醚二元醇, 聚乙二醇单甲醚, 高固含量, 聚氨酯分散体

Abstract:

Polyurethane dispersions (PUDs) with solid content above 50% were synthesized by using polyether diol containing sulfonate (SPPG), monofunctional polyethylene oxide polyether initiated by methanol(PEOM), polycarbonate diol (PCDL), polyoxytetramethylene glycol(PTMG),isophorone diisocyanate (IPDI) and ethylene diamine (EDA) by the prepolymer method.The results showed that the Zeta potentials of PUDs were between -45 mV and -65 mV. The average particle sizes of PUDs were mainly in the range of 80—140 nm and the particle size distributions of PUD were mostly in the range of 60—200 nm.The average particle sizes decreased and the particle size distributions narrowed when the sulfonate group content increased and the molar ratio of NCO/OH and the PCDL content decreased.TEM analysis showed that the spherical shapes of the particle varied in a specific range.With the increase of shear rate, the viscosity of PUDs reduced, showing pseudo-plastic characteristics.

Key words:

磺酸盐聚醚二元醇, 聚乙二醇单甲醚, 高固含量, 聚氨酯分散体