A color-stable superabsorbent polymer having long-term color stability, and methods of manufacturing the polymer, are disclosed. The superabsorbent polymer is prepared using a sulfinic acid derivative, like 2-hydroxy-2-sulfinatoacetic acid, a salt thereof, or a mixture thereof, as the reducing agent in a polymerization initiator system for the preparation of a superabsorbent polymer from monomers. The resulting superabsorbent polymer resists color degradation during periods of extended storage, even at an elevated temperature and humidity.
本发明公开了一种具有长期颜色稳定性的颜色稳定超吸收聚合物以及制造该聚合物的方法。这种超吸
水性聚合物的制备方法是在聚合
引发剂体系中使用一种
亚硫酸衍
生物,如 2-羟基-2-亚
硫基
乙酸、其盐或其混合物作为还原剂,从单体制备超吸
水性聚合物。由此制备的超吸收性聚合物在长时间储存期间,即使在温度和湿度升高的情况下,也能防止颜色退化。