Multiple base propellant with combustion inhibitor

• US 6,026,749 A
• Filed: 02/03/1978
• Issued: 02/22/2000
• Est. Priority Date: 05/11/1973
• Status: Expired due to Term

• Current Assignee: Imperial Metal Industries
• Original Assignee: Imperial Metal Industries
• Inventors: Gordon, Stuart, Evans, Geoffrey Ian
• Primary Examiner(s): Miller, Edward A.
• Application Number:
  US05/876,259
• Time in Patent Office: 8,054 Days
• Field of Search: 102/103, 102/290, 264/3 R, 149/2, 149/9, 149/97
• US Class Current: 102/290
• CPC Class Codes: C06B 45/12 having contiguous layers or zones
• CPC Class Codes: F02K 9/346 Liners, e.g. inhibitors

Abstract

A combustion inhibiting composition for use in conjunction with a solid, gas-generating charge, the composition comprising an organic polymeric material containing an oxygen-containing organic filler compatible with said polymeric material, the oxygen to carbon atom ratio of the composition being at least 1:3.

Claims

1. A double base propellant charge having in intimate contact with at least a part of its surface an elastomeric sheath comprising about 30 parts by weight of a copolymer having dispersed therein about 70 parts by weight of a filler selected from polyoxymethylene and oxamide, said copolymer comprising about 70% by weight of units derived from ethylene, about 15% by weight of units derived from methacrylic acid and about 15 parts by weight of units derived from methyl methacrylate.

2. A double base propellant charge according to claim 1 wherein said sheath has been preformed into a cup or other shaped body into which the propellant has subsequently been cast.

3. A solid multiple base gas generating charge having on at least part of its surface a layer of a substantially wholly organic combustion inhibiting composition comprising an organic polymeric material containing an oxygen-containing organic filler compatible with said polymeric material, the overall oxygen to carbon atom ratio of the composition being at least 1:

3, wherein the polymeric material contains only atoms selected from the group consisting of carbon, hydrogen, oxygen and nitrogen atoms and comprises a copolymer of at least one monoethyleneically unsaturated hydrocarbon with at least one comonomer selected from the group consisting of methacrylic acid, methyl methacrylate, acrylic acid, methyl acrylate and B-hydroxyethylacrylate.

4. A gas-generating charge according to claim 3 wherein said unsaturated hydrocarbon is ethylene.

5. A gas-generating charge according to claim 4 wherein the polymeric material contains up to 75% by weight of units derived from ethylene.

6. A gas-generating charge according to claim 5 wherein the polymeric material is a copolymer comprising about 70% by weight of units derived from ethylene, about 15% by weight of units derived from methacrylic acid and about 15% by weight of units derived from methyl methacrylate.

7. A gas-generating charge according to claim 5 wherein the polymeric material is a copolymer comprising about 65% by weight of units derived from ethylene, about 20% by weight of units derived from acrylic acid and about 15% of units derived from methyl acrylate.