(19) |
 |
|
(11) |
EP 0 393 860 A3 |
(12) |
EUROPEAN PATENT APPLICATION |
(88) |
Date of publication A3: |
|
20.05.1992 Bulletin 1992/21 |
(43) |
Date of publication A2: |
|
24.10.1990 Bulletin 1990/43 |
(22) |
Date of filing: 27.03.1990 |
|
|
(84) |
Designated Contracting States: |
|
DE ES FR IT SE |
(30) |
Priority: |
10.04.1989 GB 8907992
|
(71) |
Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC |
|
London SW1P 3JF (GB) |
|
(72) |
Inventor: |
|
- McLaughlin, John Gerard
Shevington,
Wigan, Lancs. (GB)
|
(74) |
Representative: Parker, Vernon et al |
|
ICI Group Patents Services Dept.
PO Box 6
Shire Park
Bessemer Road Welwyn Garden City
Herts, AL7 1HD Welwyn Garden City
Herts, AL7 1HD (GB) |
|
|
|
(54) |
Water/melt-in-oil emulsion explosive composition |
(57) A detonator sensitive, stable water-in-oil or melt-in-oil emulsion explosive comprises
an oxidiser containing discontinuous phase, a fuel containing continuous phase, and
an emulsifier. To increase the safety of the explosive in flammable atmospheres, such
as in coal mines, from 7% to 15% w/w of at least one of the following cooling agents
is dissolved in the discontnuous phase: sulphonate, phosphonate, ammonium halide,
alkali metal halide, alkaline earth metal halide, or a soluble phosphate salt. Preferably
at least 20% of cooling agent is distributed between the continuous and discontinuous
phases, with at least about 7% preferably about 12% present in the discontinuous phase.