| 摘要 |
<p>The present invention relates to a dry type patch for teeth whitening with multiple-layered structure of three or more layers. More particularly, in the dry type patch, a contact adhesive layer contains no peroxide and comprises a hydrophilic glass polymer as a base polymer so that it may have substantial adhesive strength when hydrated by water, an active material reservoir layer comprises peroxide as a teeth whitening agent, and a backing layer is impermeable to water. The dry type patch of the present invention has a superior teeth whitening effect and an excellent stability of peroxide in the patch at a high temperature since the peroxide-containing layer is covered with and protected by other layers.</p> |
