Multiple-layered patches for teeth whitening

A - Human Necessities – 61 – K

Patent

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Details

A61K 8/22 (2006.01) A61K 8/02 (2006.01) A61Q 11/00 (2006.01)

Patent

CA 2451431

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.

La présente invention concerne une pastille de type anhydre destinée au blanchiment dentaire. Cette pastille présente une structure multicouches constituée d'au moins trois couches. Plus particulièrement, cette pastille comprend une couche adhésive de contact exempte de peroxyde et contenant un polymère vitreux hydrophile en tant que polymère de base, de cette manière, la couche est doté d'un pouvoir adhésive important lorsqu'elle est hydratée par l'eau; une couche réservoir de matière active comprenant du peroxyde en tant qu'agent de blanchiment dentaire; et une couche dorsale imperméable à l'eau. La pastille de type anhydre susmentionnée a un effet de blanchiment dentaire supérieur et présente une excellente stabilité de la teneur en peroxyde à une température élevée, la couche à teneur en peroxyde étant recouverte et protégée par d'autres couches.

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