starting from toluene diisocyanate (tdi), polypropylene glycol (ppg) and dimethylol propionic acid (dmpa), the anionic water-borne polyurethane emulsion was synthesized.
the preparation and purification process of polypropylene glycol was studied.
本文研究了聚丙二醇的合成和精制方法。
a cathodic electrodeposition coatings was prepared employing a polypropylene glycol toughness-enhanced epoxy resin as matrix and acrylic monomers as grafted copolymer.