| abstract |
Fragrance slow-release layer comprising porous silica matrix (2A) and hollow silica shells (2B) covalently linked to the porous silica matrix (2A), also respective production process comprising coating with a sol-gel formulation and firing, wherein said formulation comprises silicium alkoxide, water soluble polymer, hollow silica shells, a basic catalyst. Also, a fragrance slow-release ceramic tile comprising said layer, composed of a ceramic body (1A) and a glaze layer (1 B), covalently linked with the fragrance slow-release layer. The fragrance slow-release layer comprises adsorbed fragrance and therefore, is useful for delivering perfumes or scents. |