Pyrotechnic coating composition

• US 4,246,051 A
• Filed: 09/15/1978
• Issued: 01/20/1981
• Est. Priority Date: 09/15/1978
• Status: Expired due to Term

• Current Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Original Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Inventors: Garner, Eugene F., Seldner, Alvin A.
• Primary Examiner(s): Miller, Edward A.
• Application Number:
  US05/942,587
• Time in Patent Office: 858 Days
• Field of Search: 149/19.6, 149/19.91, 149/82, 149/83, 149/85, 149/86, 149/7
• US Class Current: 149/7
• CPC Class Codes: C06B 45/10 the organic component containing a resin
• CPC Class Codes: C06B 45/34 the compound being an organic explosive or an organic thermic component
• CPC Class Codes: C06D 5/06 by reaction of two or more solids

Abstract

An ignition enhancer coating composition for pyrotechnic propellants comprised of about 60 to 95 wt. % of an inorganic oxidizer; about 5 to 20 wt. % of an oxygen-containing polymeric compound; about 0 to 10 wt. % polyethylene; about 0 to 10 wt. % of a transition-metal oxide; and about 0 to 5 wt. % carbon black. This invention also relates to a pyrotechnic propellant coated with said ignition enhancer composition.

Claims

1. An ignition enhancer composition for pyrotechnic propellants which comprises;

(a) about 60 to 95 weight percent of an inorganic oxidizer selected from the group consisting of sodium chlorate, potassium chlorate, sodium perchlorate and potassium chlorate;

(b) about 5 to 20 weight percent of a combustible oxygen-containing polymeric compound selected from the group consisting of polyacetal resins and polyvinyl acetate resins;

(c) about 3 to 7 weight percent of a transition metal oxide;

(d) about 1 to 5 weight percent of a polyethylene resin having a particle size equal to or less than 150 microns; and

(e) from 0 to 5 weight percent of carbon black, wherein all weight percents are based on the total weight of the composition.

2. The composition of claim 1 wherein said inorganic oxidizer is present in an amount of about 75 to 85 weight percent and said oxygen-containing polymeric compound is present in an amount of about 9 to 11 weight percent.

3. The composition of claim 2 wherein said inorganic oxidizer is potassium perchlorate, said oxygen-containing compound is polyvinyl acetate and said transition metal oxide is ferric oxide.

4. The composition of claim 3 including carbon black present in the amount of about 0.5 to 2 weight percent.

5. The composition of claim 1 wherein the inorganic oxidizer is potassium perchlorate.

6. The composition of claim 2 wherein the oxygen-containing polymeric compound is polyvinyl acetate.

7. The composition of claim 1 wherein the transition-metal oxide is selected from the group consisting of iron oxide, copper oxide, manganese oxide, and titanium oxide.

8. The composition of claim 7 wherein the transition-metal oxide is ferric oxide.

9. A pyrotechnic propellant composition suitable for use in inflating an inflatable device, said composition normally possessing less than desirable ignition properties, said composition being coated with an ignition enhancer composition comprising:

(a) about 60 to 95 weight percent of an inorganic oxidizer selected from the group consisting of sodium chlorate, potassium chlorate, sodium perchlorate and potassium chlorate;

(b) about 5 to 20 weight percent of a combustible oxygen-containing polymeric compound selected from the group consisting of polyacetal resins and polyvinyl acetate resins;

(c) about 3 to 7 weight percent of a transition metal oxide;

(d) about 1 to 5 weight percent of a polyethylene resin having a particle size equal to or less than 150 microns; and

(e) from 0 to 5 weight percent of carbon black, wherein all weight percents are based on the total weight of the composition.

10. The coated pyrotechnic composition of claim 9 wherein the pyrotechnic propellant is comprised of a acetal copolymer, carbon black, sodium chlorate, calcium sulfate sesquihydrate, and aluminum hydroxide.