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Aluminum phosphate or polyphosphate particles for use as pigments in paints and method of making same
Aluminum phosphate or polyphosphate particles for use as pigments in paints and method of making same
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机译:用作油漆颜料的磷酸铝或聚磷酸铝颗粒及其制备方法
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摘要
An aluminum phosphate or polyphosphate-based pigment product is made by a process comprising contacting phosphoric acid with aluminum sulfate and an alkaline solution to produce an aluminum phosphate based product; and optionally calcining the aluminum phosphate based product at an elevated temperature, wherein the process is substantially free of an organic acid. The aluminum phosphate or polyphosphate-based pigment is amorphous. The amorphous aluminum phosphate or polyphosphate characterized by a bulk density of less than 2.30 grams per cubic centimeter and a phosphorus to aluminum mole ratio of greater than 0.8. The composition is useful in paints and as a substitute for titanium dioxide.
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