With Vegetable Matter Or Resin Or Rubber Patents (Class 149/60)
  • Patent number: 3995673
    Abstract: A foamed or aerated explosive composition containing a water-soluble organic nitrate sensitizer is provided which retains sensitivity for long periods in small diameter cartridges. The dissipation or migration of entrained air or gas in the composition is substantially prevented by incorporating a blend of a foaming surfactant and a stabilizing surfactant in chosen proportions.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: December 7, 1976
    Assignee: Canadian Industries, Ltd.
    Inventors: Benedict John Grigaitis, Harold William Holden, Terrence Charles Matts, Maurice Henry Miskow, Jean Paul Richard, Philip Faut Lit Seto
  • Patent number: 3966516
    Abstract: A slurry explosive composition comprising an inorganic oxidizing acid salt, water, a combustible material, a thickener, a nitroparaffin and an amide is very sensitive and stable, and can be detonated at low temperature without the use of primer.
    Type: Grant
    Filed: June 18, 1975
    Date of Patent: June 29, 1976
    Assignee: Nippon Oils and Fats Company Limited
    Inventors: Hiroshi Sakai, Fumio Takeuchi, Tsutomu Hanake
  • Patent number: 3962001
    Abstract: Non-cap sensitive aqueous gel explosives containing no suspended solid fuels are made by combining water, hexamethylenetetramine, ammonium nitrate, sodium nitrate, ammonium perchlorate and nitric acid, along with sufficient polysaccharide gum to thicken the mixture. These explosives are rendered cap sensitive by mixing therewith paint grade aluminum powder or other conventional sensitizing agents. According to a preferred procedure, a cap sensitive aqueous gel explosive is made by a procedure in which nitric acid and aqueous hexamethylenetetramine solution are first combined under controlled conditions of temperature and pH and ammonium nitrate, sodium nitrate, ammonium perchlorate, thickening agent and aluminum powder are added in controlled amounts in a specified order. The products possess cap sensitivity, even at temperatures as low as minus 23.degree.C.
    Type: Grant
    Filed: March 10, 1975
    Date of Patent: June 8, 1976
    Assignee: Gulf Oil Corporation
    Inventors: Edwin G. Marhofer, Mike L. Marrello, Glenn E. Tolle
  • Patent number: 3959044
    Abstract: Particulate high explosives containing ammonium nitrate and organic or inorganic ammonium nitrate sensitizers are disclosed along with methods of producing the same. The sensitizers, comprising sulfur, metals, carbonaceous material and combinations of these, are dispersed throughout each particle in intimate association with the ammonium nitrate by suspension in a layer of ammonium nitrate-calcium sulfate reaction product.
    Type: Grant
    Filed: March 17, 1975
    Date of Patent: May 25, 1976
    Assignee: Union Oil Company of California
    Inventor: Donald C. Young
  • Patent number: 3940297
    Abstract: A stable, gelled, water-bearing explosive composition and a process for making same. The composition comprises at least one water-soluble inorganic oxygen releasing salt; at least one fuel; water; and at least one gum selected from the group consisting of galactomannans and xanthans crosslinked in situ with a crosslinking agent comprising a redox system which system comprises at least one arsenious compound.
    Type: Grant
    Filed: November 5, 1973
    Date of Patent: February 24, 1976
    Assignee: ICI Australia Limited
    Inventor: Frederick Bolza
  • Patent number: 3932242
    Abstract: 1. A solid propellant charge for rocket motors consisting essentially of a formed vulcanized mixture of rubbery isobutylene-isoprene copolymer fuel binder in the proportion of 10-20% by weight and a solid inorganic strong oxidizing salt in the proportion of 80-90% by weight.
    Type: Grant
    Filed: May 8, 1961
    Date of Patent: January 13, 1976
    Inventors: Charles E. Bartley, Lawrence R. Settlemire
  • Patent number: RE28848
    Abstract: Slurry blasting compositions of low water content and high density, including substantial proportions of calcium nitrate as an oxidizer component, can be sensitized in various ways to produce economical explosive compositions. Sensitizers may include aluminum powder, granular explosives such as smokeless powder, TNT, etc.; a particularly preferred sensitizer or fuel is ethylene glycol. Solid carbonaceous fuels and conventional thickeners may be added. The calcium nitrate may be produced directly from burned lime with nitric acid and/or other nitrates.
    Type: Grant
    Filed: October 24, 1972
    Date of Patent: June 8, 1976
    Assignee: Ireco Chemicals
    Inventors: Robert B. Clay, Melvin A. Cook, Lex L. Udy