This invention regards the new pH sensitivity polymer which shows pH dependant swelling behavior/melting behavior. The particular composition is useful as a flavor masking of the medicine which has bitterness and as a delivery of the stomach of the particular medicine. The aforementioned polymer includes the hydrophobic monomer which is polymerized in addition to hydrophobic monomer or basic monomer and the hydrophilic monomer which are polymerized in addition to basic monomer.本発明は、pH依存性膨潤挙動/溶解挙動を示す新規pH感受性ポリマーに関する。当該組成物は、苦味のある薬物の風味マスキングとして及び当該薬物の胃のデリバリーとしても有用である。前記ポリマーは、塩基性モノマーに加えて重合される疎水性モノマー又は塩基性モノマー及び親水性モノマーに加えて重合される疎水性モノマーを含む。
