A release sustaining composition comprising a polyalkylene polyol derivative comprising repeating units U-1 derived from a water-soluble polyalkylene polyol and a polyisocyanate and repeating units U-2 derived from a dihydroxy compound and a polyisocyanate in a molar ratio of U-1/U-2 between 0.5/0.5 and 0.99/0.01 and optionally a water-soluble cellulose ether is combined with an active ingredient to make a sustained release preparation.
一种持续释放组合物,包括由可溶于
水的聚烯烃聚醚和聚
异氰酸酯衍生的重复单元U-1以及由二羟基化合物和聚
异氰酸酯衍生的重复单元U-2,在U-1/U-2的摩尔比在0.5/0.5至0.99/0.01之间,可选地与可溶于
水的
纤维素醚结合,用于制备持续释放制剂。