Robert W Trebilcock

US Patent:

46197214, Oct 28, 1986

Filed:

Oct 15, 1985

Appl. No.:

6/787442

Inventors:

Lawrence A. Cescon - Portogruaro, IT
Robert W. Trebilcock - Littleton CO

Assignee:

E. I. Du Pont de Nemours and Company - Wilmington DE

International Classification:

C06B 4502

US Classification:

149 21

Abstract:

In emulsion blend explosives, the replacement of coarse salt particles, e. g. , prills, by fines, i. e. , particles which pass a No. 50 U. S. sieve, increases the water resistance of the explosive without deleteriously affecting its shelf life provided that the explosive, prior to such replacement, is storage-stable as determined by the Salt Extraction and lead compression tests described herein. Products containing a combination of whole and crushed ammonium nitrate prills, and emulsions made with an anionic emulsifying agent such as a fatty acid salt, are preferred. Depending on the fines content and chemical composition, other properties such as sensitivity to initiation and detonation velocity also may be improved.

US Patent:

47145030, Dec 22, 1987

Filed:

Oct 2, 1986

Appl. No.:

6/912760

Inventors:

Lawrence A. Cescon - Portogruaro, IT
Robert W. Trebilcock - Littleton CO
Robert H. Moffett - Lovettsville VA

Assignee:

E. I. DuPont de Nemours and Company - Wilmington DE

International Classification:

C06B 4502

US Classification:

149 21

Abstract:

In emulsion blend explosives, the replacement of coarse salt particles, e. g. , prills, by fines, i. e. , particles which pass a No. 50 U. S. sieve, increases the water resistance of the explosive without deleteriously affecting its shelf life provided that the explosive, prior to such replacement, is storage-stable as determined by the Salt Extraction and lead compression tests described herein. Products containing a combination of whole and crushed ammonium nitrate prills, and emulsions made with an anionic emulsifying agent such as a fatty acid salt, are preferred. Depending on the fines content and chemical composition, other properties such as sensitivity to initiation and detonation velocity also may be improved.