(19)
(11) EP 0 372 893 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
29.08.1990 Bulletin 1990/35

(43) Date of publication A2:
13.06.1990 Bulletin 1990/24

(21) Application number: 89312639.1

(22) Date of filing: 04.12.1989
(51) International Patent Classification (IPC)5: C06C 7/00, C06B 41/02, C06B 23/00
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 05.12.1988 AU 1757/88

(71) Applicant: THE COMMONWEALTH OF AUSTRALIA
Canberra, Australian Capital Territory 2600 (AU)

(72) Inventor:
  • Bentley, John R.
    Ascot Vale Victoria 3032 (AU)

(74) Representative: Hale, Stephen Geoffrey et al
J.Y. & G.W. Johnson Furnival House 14/18 High Holborn
London WC1V 6DE
London WC1V 6DE (GB)


(56) References cited: : 
   
       


    (54) Conducting primer compositions


    (57) A conducting composition for detonators having insen­sitivity to one amp of current or one watt of power con­sisting of 40 to 80 percent by weight of lead styphnate, 2 to 10 percent by weight of carbon black and/or graphite and the balance lead oxide or other exposive or non-explosive material. Firing times of less than eight milliseconds can be achieved where at least one percent of graphite is included in the composition.





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