PROBLEM TO BE SOLVED: To provide an oral-care composition that can keep effective components, metal-containing compounds, in an oral cavity for a long period to control pH at the surface of the tooth to thereby prevent dental erosion.SOLUTION: An oral care composition comprises: (a) an orally acceptable vehicle (b) a copolymer of a methylvinyl ether and a maleic anhydride (c) a metal compound or salt that becomes more soluble at acidic pH and (d) an abrasive. Preferably, the metal compound or its salt is a calcium compound, such as calcium carbonate, or its salt or a zinc compound, such as zinc oxide, zinc carbonate, zinc citrate, zinc silicate, zinc stannate, zinc benzoate, zinc tetrafluoroborate, and zinc hexafluorosilicate, or its salt.COPYRIGHT: (C)2015,JPO&INPIT【課題】歯の表面におけるpHを制御して歯の侵食を予防するために、有効成分である金属含有化合物を口腔中に長時間滞留させることができる口腔ケア組成物の提供。【解決手段】(a)口に許容できるビヒクル;(b)メチルビニルエーテル及び無水マレイン酸のコポリマー;(c)酸性pHにおいてより可溶性になる金属化合物又はその塩;並びに(d)研磨剤、を含む口腔ケア組成物。前記金属化合物又はその塩は、炭酸カルシウム等のカルシウム化合物又はその塩;酸化亜鉛、炭酸亜鉛、クエン酸亜鉛、ケイ酸亜鉛、スズ酸亜鉛、安息香酸亜鉛、テトラフルオロホウ酸亜鉛、ヘキサフルオロケイ酸亜鉛等の亜鉛化合物又はその塩であることが好ましい。【選択図】なし
