Acicular, crystalline calcium metaphosphate

Details Acicular, crystalline calcium metaphosphate Acicular, crystalline calcium metaphosphate

C - Chemistry, Metallurgy

01

B

6/216, 23/64

C01B 25/44 (2006.01) C04B 14/38 (2006.01) C04B 26/02 (2006.01) C08K 7/08 (2006.01) C10M 113/08 (2006.01)

Patent

CA 1160019

43-4571 ACICULAR, CRYSTALLINE CALCIUM METAPHOSPHATE ABSTRACT Acicular, crystalline calcium metaphosphate having a length to average diameter ratio of at least 10:1 can be prepared by forming a melt of materials used as a source of calcium, phosphorus and alkali metal, cooling the melt to about 550°C. to about 870°C., inducing acicular crystal formation, and recovering the acicular crystals. The diameters of the resultant acicular, crystalline calcium metaphosphates can average as small as 0.5 micron or smaller. Acicular, crystalline calcium metaphos- phate can also be prepared with an average diameter of several microns and a length of several centimeters. Such acicular, crystalline calcium metaphosphates are useful in a number of applications, and particularly to prepare composites with organic polymeric materials.

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