| (19) |
 |
|
(11) |
EP 0 070 932 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
05.10.1983 Bulletin 1983/40 |
| (43) |
Date of publication A2: |
|
09.02.1983 Bulletin 1983/06 |
| (22) |
Date of filing: 24.07.1981 |
|
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE FR GB IT LI LU NL SE |
| (71) |
Applicant: IDL CHEMICALS LIMITED |
|
() |
|
| (72) |
Inventors: |
|
- Patwardhan, Waman Dattatraye
()
- Mukherjee, Anjan
()
- Ramaswamy, Coodly Puttasastry
()
|
|
| |
|
| (54) |
Initiatory explosive for detonators and method of preparing the same |
(57) An initiatory explosive suitable for use in a detonator in place of the known ASA
mixture is composed of isogonous mixed crystals of lead azide and lead styphnate which
can be produced by introducing simultaneously into a reactor vessel a solution containing
lead acetate and a solution containing a water-soluble styphnate and sodium azide
so as to cause them to react in the presence of a crystal habit modifier such as dextrin
or carboxymethyl cellulose which will cause the resulting precipitate to be a homogeneous
crystalline material composed of isogonous mixed crystals.