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US 8,025,010 B1Granted
Method for reducing charge retention properties of solid propellants
AssigneeAlliant Techsystems Inc.
InventorGary K. Lund
Life of this patent
Estimating the term…
Abstract
A quaternary salt is added at low concentrations to a solid propellant, thereby increasing the conductivity of the polymeric binder to provide for safe discharge of static electricity at relatively low potentials.
Claims15
A process for reducing the electrostatic charge retention of a solid propellant comprising:
- including as an ingredient in a solid propellant an electrolyte additive represented by the following formula:
- wherein R and R′ are at least one of an aliphatic group, a substituted aliphatic group, an aromatic group, and a substituted aromatic group;
- A is phosphorus, arsenic, or antimony;
- B is a negatively charged counterion;
- and
- n is the number of negatively charged counterions required to electrostatically balance the electrolyte additive.
3 more elements
A process for reducing an electrostatic charge retention of a solid propellant comprising:
- blending a solid propellant comprising ammonium perchlorate (AP) with an electrolyte additive represented by the following formula:
- wherein R and R′ are at least one of an aliphatic group, a substituted aliphatic group, an aromatic group, and a substituted aromatic group;
- A is phosphorus, arsenic, or antimony;
- B is a negatively charged counterion;
- and
- n is the number of counterions required to electrostatically balance the electrolyte additive.
3 more elements
An electrolyte additive for reducing an electrostatic charge retention of a solid propellant, comprising:
- a quaternary salt represented by the following formula:
- wherein each of R and R′ is at least one of a nitro substituted aromatic group, an alkyne substituted aromatic group, and a nitrile substituted aromatic group;
- A is phosphorus, arsenic, or antimony;
- B is a negatively charged counterion;
- and
- n is the number of counterions required to electrostatically balance the quaternary salt.
3 more elements
Dependencies are inferred from the claim text.