A reversely thermo-reversible hydrogel composition comprising a water soluble block copolymer comprising at least two blocks of polyethylene oxide and at least one block of polypropylene oxide, and at least one associative gelling adjuvant having water solubility less than 0.5 g/100ml, preferably less than 0.3 g/100 ml at 20 °C, and being capable of forming water soluble inter-molecular complexes with the water soluble block copolymer in water. The hydrogel composition exhibits improved gelling efficiency, enhanced solubility and/or stability for water sparely soluble and insoluble pharmaceutical agents. The hydrogel compositions are useful in a variety of pharmaceutical and cosmetic products and applications, such as esophageal, otic, vaginal, rectal, ophthalmic, and treatments of disorders and imperfections of the skin.
一种反向热可逆
水凝胶组合物,它包含一种
水溶性嵌段共聚物,该嵌段共聚物由至少两个聚
环氧乙烷嵌段和至少一个聚环氧
丙烷嵌段组成;以及至少一种缔合胶凝佐剂,该佐剂在 20 °C 时的
水溶性小于 0.5 克/100 毫升,最好小于 0.3 克/100 毫升,并能与
水溶性嵌段共聚物在
水中形成
水溶性分子间络合物。这种
水凝胶组合物的胶凝效率提高,对
水溶性和不溶性药剂的溶解度和/或稳定性增强。这种
水凝胶组合物适用于各种医药和化妆品及应用,如食道、耳道、阴道、直肠、眼科以及皮肤疾病和瑕疵的治疗。