环保双组分水性聚氨酯地坪用水性聚酯分散体的制备及性能

Preparation and properties of waterborne polyester dispersion applied to environmentally friendly waterborne two-component polyurethane floor coating

分别以50~60 g乙二醇、95~100 g新戊二醇、40~50 g三羟甲基丙烷作为多元醇组分,80~95 g 1,4-环己烷二甲酸、220~240 g四氢苯酐作为多元酸组分,20~25 g间苯二甲酸-5-磺酸钠作为亲水单体,0.2~0.8 g有机锡化合物作为催化剂,采用直接酯化合成法制备了一种高性能的水性聚酯。研究了间苯二甲酸-5-磺酸钠的加入量对水性聚酯水溶性和贮存稳定性的影响,得出其适宜用量为总物料的5%以上。该水性聚酯与固化剂Bayhydur~?XP2487/1复配所得双组分水性聚氨酯地坪具有良好的综合性能。

A high-performance waterborne polyester was prepared by direct esterification with 50-60 g ethylene glycol, 95-100 g neopentyl glycol and 40-50 g trimethylolpropane as polyol components, 80-95 g 1,4-cyclohexanedicarboxylic acid and 220-240 g tetrahydrophthalic anhydride as polyprotic acid components, 20-25 g sodium 5-sulfoisophthalate as hydrophilic monomer, and 0.2-0.8 g organotin compound as catalyst. The effect of the dosage of sodium 5-sulfoisophthalate on the water solubility and storage stability of the waterborne polyester was studied. The suitable dosage of sodium 5-sulfoisophthalate was determined to be at least 5% of the total mass of raw materials. The two-component polyurethane floor coating formulated with the given waterborne polyester and Bayhydur XP2487/1 curing agent has a good comprehensive performance.