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US 4,329,327 AGranted
Method for making B-form aluminum trimetaphosphate from powder reactants
AssigneePPG Industries, Inc.
InventorsJames E. Neely, Jr., Annette Moff, Chia-Cheng Lin, Charlene A. Falleroni
Life of this patent
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Abstract
A method for preparing aluminum trimetaphosphate predominately in the B-form by heating a mixture of aluminum hydroxide and ammonium phosphate compound is disclosed.
Claims4
A method for making the B-form of aluminum trimetaphosphate comprising the steps of:
- a. thoroughly mixing together aluminum hydroxide and ammonium phosphate in approximately stoichiometric quantities;
- and
- b. heating the mixture at a temperature of from about 630.degree. to about 640.degree. C. for a sufficient time to obtain aluminum trimetaphosphate in predominantly the B-form.
Dependencies are inferred from the claim text.