Aluminum phosphate composite materials and compositions

摘要

AlP composite materials comprise an AlP aggregate core, and a shell disposed partially or entirely over the core and formed from a pigment material, e.g., TiO2, having an index of refraction greater than the core, providing an overall index or refraction greater than the core and suited for use as a pigment replacement or extender. The AlP core comprises amorphous AlP, crystalline AlP, or a combination thereof, and can have an average particle size of less than about 30 microns. The TiO2 can have an average grain size less than about 10 microns. The shell can have a layer thickness that is at least about 0.0001 microns. The shell is bonded to the core by a reaction between functional groups of the shell and core. The AlP composite material can be engineered to provide properties in addition to brightness for use as a pigment such as anticorrosion and/or antimicrobial protection.

主权项

1. A chemical composition comprising:
an aluminum phosphate composite material comprising:
a core particle comprising an aggregation of bonded together amorphous aluminum phosphate grains extending throughout the core particle, the core particle occupying a central region of the composite; anda layer of material different from the core disposed over an outside surface of the core particle and forming a shell over at least a portion of the core particle, the shell occupying an outer region of the composite;wherein the composite material comprises a chemical reaction product formed between POH groups of the core and a material of the shell bonding the core and shell together; a binding polymer, wherein the aluminum phosphate composite material is in the form of particles dispersed within the binding polymer.