| abstract |
Composition for the preparation of physical sunscreens, comprising an organic matrix formed by polymer molecules, in which hydroxyapatite nanoparticles substituted by titanium and / or iron ions are bound, in which phosphorus is partially substituted by titanium in an amount of between 8 and 50 atomic% with respect to phosphorus, and / or in which calcium is partially substituted by iron in an amount of between 2 and 40 atomic% with respect to calcium, and where the amount of the The organic matrix is between 5 and 60% by weight and the amount of substituted hydroxyapatite is between 35 and 90% by weight, the remaining part being water. |