High pressure-resistant nonincendive emulsion explosive

Patent · Sat Jan 01 04:00:00 EST 1994

OSTI ID:869611

Ruhe, Thomas C ^[1]; Rao, Pilaka P ^[2]

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1. Duquesne, PA
2. Baghlingampalli, IN

An improved emulsion explosive composition including hollow microspheres/bulking agents having high density and high strength. The hollow microspheres/bulking agents have true particle densities of about 0.2 grams per cubic centimeter or greater and include glass, siliceous, ceramic and synthetic resin microspheres, expanded minerals, and mixtures thereof. The preferred weight percentage of hollow microspheres/bulking agents in the composition ranges from 3.0 to 10.0 A chlorinated paraffin oil, also present in the improved emulsion explosive composition, imparts a higher film strength to the oil phase in the emulsion. The emulsion is rendered nonincendive by the production of sodium chloride in situ via the decomposition of sodium nitrate, a chlorinated paraffin oil, and sodium perchlorate. The air-gap sensitivity is improved by the in situ formation of monomethylamine perchlorate from dissolved monomethylamine nitrate and sodium perchlorate. The emulsion explosive composition can withstand static pressures to 139 bars and dynamic pressure loads on the order of 567 bars.

• Research Organization: National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV
• Assignee: United States of America as represented by Secretary of (Washington, DC)
• Patent Number(s): US 5366571
• OSTI ID: 869611
• Country of Publication: United States
• Language: English

Related Subjects

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10
139
567
agents
air-gap
bars
bulking
bulking agents
centimeter
ceramic
chloride
chlorinated
composition
composition including
composition ranges
cubic
cubic centimeter
decomposition
densities
density
dissolved
dynamic
dynamic pressure
emulsion
emulsion explosive
expanded
explosive
explosive composition
film
formation
glass
grams
hollow
hollow microspheres
imparts
improved
including
loads
microspheres
minerals
mixtures
monomethylamine
nitrate
nonincendive
oil
oil phase
paraffin
particle
percentage
perchlorate
phase
preferred
pressure
pressure-resistant
pressures
production
ranges
rendered
resin
resin microspheres
sensitivity
siliceous
situ
situ formation
sodium
sodium chloride
sodium nitrate
static
static pressure
strength
synthetic
true
via
weight
weight percent
weight percentage
withstand