Coated solid additives for explosives

• US 5,123,981 A
• Filed: 04/01/1991
• Issued: 06/23/1992
• Est. Priority Date: 06/14/1990
• Status: Expired due to Fees

• Current Assignee: ICI Canada, Inc. (Ici Paints)
• Original Assignee: Atlas Powder Co.
• Inventors: Mullay, John J., Farkas, Jane M.
• Primary Examiner(s): Lechert, Jr., Stephen J.
• Application Number:
  US07/678,452
• Time in Patent Office: 449 Days
• Field of Search: 149/6, 149/7
• US Class Current: 149/7
• CPC Class Codes: C06B 45/18 comprising a coated component particles dispersed in a matrix C06B45/04; coated explosive charges F42B
• CPC Class Codes: C06B 47/00 Compositions in which the components are separately stored until the moment of burning or explosion, e.g. "Sprengel"-type explosives; Suspensions of solid component in a normally non-explosive liquid phase, including a thickened aqueous phase
• CPC Class Codes: C06B 47/145 Water in oil emulsion type explosives in which a carbonaceous fuel forms the continuous phase

Abstract

In one aspect, the present invention relates to coating a solid which has acid or base sites on its surface with a surfactant having acid or base characteristics capable of neutralizing the acidic or basic characteristics of the solid surface. Said coating applied in sufficient quantity to result in neutralization of the acid or base sites on the solid. In another aspect, the present invention relates to a water-in-oil or melt-in-fuel blended explosive composition including solid components wherein said solid components have a coating to neutralize the acid or base sites on the solid, and the emulsifier utilized in the emulsion has acid or base properties which are the same as the properties of the coating applied to the solid.

Claims

1. A solid consisting of ammonium nitrate for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having acidic sites on its surface coated with a surfactant having a basic moiety in sufficient quantity to substantially neutralize the acidic sites on the solid.

2. The solid of claim 1 wherein the surfactant is comprised of a hydrogenated tallow amine or sorbitan monooleate.

3. A solid consisting of cork for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having acidic sites on its surface coated with a surfactant having a basic moiety in sufficient quantity to substantially neutralize the acidic sites on the solid.

4. The solid of claim 3 wherein the surfactant is comprised of a hydrogenated tallow amine or sorbitan monooleate.

5. A solid consisting of balsa for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having acidic sites on its surface coated with a surfactant having a basic moiety in sufficient quantity to substantially neutralize the acidic sites on the solid.

6. The solid of claim 5 wherein the surfactant is comprised of a hydrogenated tallow amine or sorbitan monooleate.

7. A solid consisting of microspheres for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having acidic sites on its surface coated with a surfactant having a basic moiety in sufficient quantity to substantially neutralize the acidic sites on the solid.

8. The solid of claim 7 wherein the surfactant is comprised of a hydrogenated tallow amine or sorbitan monooleate.

9. A solid consisting of microspheres for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having basic sites on its surface coated with a surfactant having an acidic moiety in sufficient quantity to substantially neutralize the basic sites on the solid.

10. The solid of claim 9 wherein the surfactant is comprised of oleic acid.

11. A solid consisting of rubber for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having acidic sites on its surface coated with a surfactant having a basic moiety in sufficient quantity to substantially neutralize the acidic sites on the solid.

12. The solid of claim 11 wherein the surfactant is comprised of a hydrogenated tallow amine or sorbitan monooleate.

13. A solid consisting of rubber for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having basic sites on its surface coated with a surfactant having an acidic moiety in sufficient quantity to substantially neutralize the basic sites on the solid.

14. The solid of claim 13 wherein the surfactant is comprised of oleic acid.

15. A solid consisting of sodium nitrate for use with a water-in-oil or melt-in-fuel emulsion to produce a blended explosive, said solid having acidic sites on its surface coated with a surfactant having a basic moiety in sufficient quantity to substantially neutralize the acidic sites on the solid.

16. The solid of claim 15 wherein the surfactant is comprised of a hydrogenated tallow amine and an organic acid or sorbitan monooleate.

17. A solid incorporated into a melt-in-fuel emulsion, said solid having acidic sites on its surface coated with a surfactant having a basic moiety in sufficient quantity to substantially neutralize the acidic sites on said solid.

18. The solid of claim 17 wherein the surfactant is comprised of a hydrogenated tallow amine, an organic acid, and mineral oil or sorbitan monooleate.

19. The solid of claim 17 wherein the solid consists of sodium nitrate or ammonium nitrate.

20. The solid of claim 17 wherein the solid consists of glass or resin microspheres.

21. The solid of claim 17 wherein the solid consists of rubber.

22. The solid of claim 17 wherein the solid consists of balsa.

23. The solid of claim 17 wherein the solid consists of cork.