Cementitious product with phosphorescense

Abstract

The present invention pertains to the use of phosphorescent pigments in cementious materials and allied applications, specifically in use for tile mortars and grouts, pool plasters, wall plasters, cementious roofing materials, cementious surface coatings, cement patches and self leveling compounds. The material will luminesce in the absence of an external source after irradiation with sunlight, visible, ultra-violet (UV) and/or infrared radiation without any degradation in the integrity of the cementious materials from their original applications. The cementious materials need to be capable of being applied by trowel, brush, or spray, forming a strong bond to the surface to which it has been applied. The phosphorescent material should be insoluble in water, compatible with cementious materials, remain fixed in the cementious material, effective at high pH, and produce a long lasting luminescence, for up to 8 to 12 hours, in the visible portion of the spectrum after exposure to a radiation source. So long as the material is exposed to sunlight, no other source of radiation is required. The cementious materials shall be both functional and aesthetically pleasing under normal visible light conditions and in the absence of source excitation, the material will glow in the visible portion of the spectrum, providing light for aesthetic effect and/or safety considerations.

Dependencies are inferred from the claim text.