Patent · US Expired

Process for producing fine-grained .beta.-HMX

US4794180A · kind A · utility

2Cited by

3References

8Claims

0Family size

Assignee

Dynamit Nobel GmbH · DE

Inventors

Klaus Heinemeyer · Leverkusen, DE
Klaus Redecker · Nuremberg, DE
Ulrich Sassmannshausen · Münstermaifeld, DE

Key dates

Filing date	May 26, 1987
Grant date	Dec 27, 1988
Priority date	—
Expiry date	May 26, 2007

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D257/02
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

A process for producing fine-grained .beta.-HMX wherein a solution of .beta.-HMX is treated in a .gamma.-lactone in a temperature range of between 5.degree. and 15.degree. C. with toluene, and the desired fine and very pure .beta.-HMX crystals are precipitated. The resultant crystals have grain sizes of down to 5 .mu.m and exhibit an extremely small proportion of other modifications or forms of HMX. An additional aspect of the process resides in providing the very fine .beta.-HMX with a coating of a thermoplastic polymer. In this procedure, the .beta.-HMX particles, after having been separated from toluene, are made into a slurry in water and combined under agitation at temperatures of between 25.degree. and 60.degree. C. with a solution or suspension or emulsion of the thermoplastic polymer. During this step, granules are formed which can be separated after distillation of the solvent.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.