Phosphoric acid spelter ultraviolet ray absorbent, and the production manner

摘要

PURPOSE: To provide a safe and stable ultraviolet absorber which can allow visible rays to pass through in a significant proportion and absorb only ultraviolet rays selectively and production thereof. ;CONSTITUTION: The object zinc phosphate ultraviolet absorber is prepared by allowing a slightly soluble zinc phosphate which is composed of zinc phosphate and at least one selected from the phosphates of lithium, sodium, potassium, ammonium, calcium, aluminum, magnesium and strontium to support one of or both of cerium and silver in an amount of 1 to 20wt.% in total and the process for preparing the absorber in the form of a slurry of highconcentration is provided.;COPYRIGHT: (C)1995,JPO