SELF-EXTINGUISHING SOLID PROPELLANT FORMULATIONS

• US 3,632,458 A
• Filed: 05/02/1968
• Issued: 01/04/1972
• Est. Priority Date: 05/02/1968
• Status: Expired due to Term

• Current Assignee: Don L. Stevens, Harold E. Filter
• Original Assignee: Don L. Stevens, Harold E. Filter
• Inventors: Filter, Harold E., Stevens, Don L.
• Primary Examiner(s): Padgett, Benjamin R.
• Application Number:
  US04/726,091
• Time in Patent Office: 1,342 Days
• Field of Search: 149/19,20,29-32,40,44,41
• US Class Current: 149/19.3
• CPC Class Codes: A23G 4/06 characterised by the composition containing organic or inorganic compounds
• CPC Class Codes: C06B 23/005 Desensitisers, phlegmatisers coolants for mining explosives C06B23/04; deactivating C06B21/0091
• CPC Class Codes: C06B 45/10 the organic component containing a resin
• CPC Class Codes: Y10S 149/116 Flare contains resin

Abstract

A self-extinguishing solid propellant composition comprising a phosphorous-oxygen containing compound, a polymeric binder-fuel, an oxidizing agent, and a predetermined amount of particulate aluminum.

Claims

2. The solid propellant composition defined in claim 1 and including a cross-linked polymeric binder-fuel consisting of a polymeric fluorocarbon binder and a peroxide cross-linking promoter.

3. The solid propellant composition comprising on a weight basis:

a. from about 0.5 to about 5 percent of a flame-retardant phosphorous-oxygen compound, selected from the group consisting of phosphorous pentoxide or ammonium acid phosphate, b. from about 5 to about 30 percent by weight of particulate aluminum fuel of from about 5 to about 590 mIcrons in size, c. from about 50 to about 75 percent by weight of finely particulated ammonium perchlorate, ammonium nitrate or mixtures thereof as oxidizer, and d. from about 10 to about 30 percent by weight of a cross-linked polymeric binder-fuel selected from the group consisting of polyglycols, diamine terminated polyglycols, monoacid salts of diamine terminated polyglycols, and diacid salts of diamine terminated polyglycols.

4. The propellant composition defined in claim 3 and including a cross-linked polymeric binder-fuel consisting of a member selected from the group consisting of the mono- and diacid salts of diamine terminated polyglycols, diamine terminated polyglycols, and monoamine terminated polyglycols, as polymeric binder, and a member selected from the group consisting of liquid epoxy resins, epoxidized carbohydrates, and mixtures thereof, as curing agents, wherein the epoxide equivalent/amine hydrogen equivalent ratio ranges from about 0.75 to about 1.5.

5. The formulation as defined in claim 3 wherein the phosphorous-oxygen flame-retardant compound is a member selected from the group consisting of monoammonium phosphate or phosphorous pentoxide, the particulate aluminum ranges in size from about 5 to about 50 microns, the polymeric binder-fuel is a compound selected from the class consisting of polyglycols, diamine terminated polyglycols or monoacid salts of diamine terminated polyglycols wherein the polyglycol moiety has a molecular weight of from about 200 to about 2,400 and is selected from the class consisting of polypropylene glycol, polybutylene glycol, and polyethylene glycol, and the curing agent is a nonhalogenated, epoxy resin.

6. The formulation as defined in claim 3 wherein by weight about 3 percent is monoammonium phosphate, about 13 percent is particulate aluminum fuel, about 16 percent is the perchlorate salt of diamine terminated polypropylene glycol wherein the polypropylene glycol moiety has a molecular weight of about 2, 000, about 64 percent is finely particulated potassium perchlorate, and about 4 percent is a nonhalogenated epoxy resin.

7. The formulation as defined in claim 3 wherein from about one-tenth to about seven-tenths by weight of the ammonium perchlorate oxidizer is coated with a polyaliphatic fluorocarbon.

8. The formulation as defined in claim 3 wherein the particulate aluminum fuel consists of a mixture of spherical and flake particles and wherein the spherical/flake weight proportion is a maximum of about 20/1.