Invention Application
- Patent Title: Aluminum phosphate, polyphosphate and metaphosphate particles and their use as pigments in paints and method of making same
- Patent Title (中): 磷酸铝，多磷酸盐和偏磷酸盐颗粒及其在油漆中的用途及其制备方法
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Application No.: US11364798Application Date: 2006-02-27
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Publication No.: US20060211798A1Publication Date: 2006-09-21
- Inventor: Fernando Galembeck , Joao Brito
- Applicant: Fernando Galembeck , Joao Brito
- Priority: BRP10403713-8 20040830
- Main IPC: C09D11/00
- IPC: C09D11/00 ; C04B14/00 ; C08K3/32
Abstract:
An aluminum phosphate composition comprising aluminum phosphate, aluminum polyphosphate, aluminum metaphosphate, or a mixture thereof. The composisition may be characterized by, when in powder form, having particles wherein some of the particles have at least one or more voids per particle. In addition, the composition is characterized by exhibiting two endothermic peaks in Differential Scanning Calorimetry between about 90 degrees to about 250 degrees Celsius. The composition is also characterized by, when in powder form, having a dispersibility of at least 0.025 grams per 1.0 gram of water. The composition 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, polyphosphate or metaphosphate based product at an elevated temperature. The composition is useful in paints and as a substitute for titanium dioxide.
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