METHOD OF MAKING SPONGE PROPELLANT

• US 3,829,537 A
• Filed: 08/27/1954
• Issued: 08/13/1974
• Est. Priority Date: 04/30/1953
• Status: Expired due to Term

• Current Assignee: Henry Rosenthal
• Original Assignee: Henry Rosenthal
• Inventors: Rosenthal, Henry
• Primary Examiner(s): Lechert, Jr., S. J.
• Application Number:
  US03/452,743
• Time in Patent Office: 7,291 Days
• Field of Search: 18/48S,DIG.15,55S 264/3R 149/2,100
• US Class Current: 264/3.1
• CPC Class Codes: C06B 21/0091 Elimination of undesirable or temporary components of an intermediate or finished product, e.g. making porous or low density products, purifying, stabilising, drying; Deactivating; Reclaiming; porous inert particles or chemicals compounded for these purposes C06B23/00

Abstract

1. A method of forming a shaped, propellant charge having a sponge-like cellular structure which comprises incorporating in a colloided nitrocellulose composition a solvent for an inert gas, placing the said composition in a suitable mold, subjecting said composition to an atmosphere of inert gas at elevated pressures and to heat not exceeding 65*C, and then releasing the gaseous pressure whereby the explosive composition is expanded to form a unitary, spongy structure substantially in the form of the mold.

Claims

1. A METHOD OF FORMING A SHAPED. PROPELLANT CHARGE HAVING A SPONGE-LIKE CELLULAR STRUCTURE WHICH COMPRISES INCORPORATING IN A COLLOIDED NITROCELLULOSE COMPOSITION A SOLVENT FOR AN INERT GS, PLACING THE SAID COMPOSITION IN A SUITABLE MOLD, SUBJECTING SAID COMPOSITION TO AN ATMOSPHERE OF INERT GAS AT ELEVATEF PRESSURES AND TO HEAT NOT EXCEEDING 60*C, AND THEN RELEASING THE GASEOUS PRESSURE WHEREBY THE EXPLOSIVE COMPOSITION IS EXPANDED TO FORM A UNITARY, SPONGY STRUCTURE SUBSTANTIALLY IN THE FORM OF THE MOLD.

2. A method of forming a shaped, propellant charge which comprises incorporating in a colloided nitrocellulose composition an alkyl acetate as a solvent for a gas which is inert to said composition, placing the said composition in a suitable mold, subjecting said composition to an atmosphere of inert gas at elevated pressures and to heat not exceeding 65*C, and then releasing the gaseous pressure whereby the explosive composition is expanded to form a unitary, spongy structure substantially in the form of the mold.

3. The method recited in claim 2 wherein said alkyl acetate is ethyl acetate.