Precursor compositions comprising a polymeric material, a bromine-containing flame retardant, and antimony trioxide
AssigneeNorthrop Grumman Systems Corporation
InventorsNathan A. Spahn, Matthew S. Scott, Brandon C. Durney, Gregory B. Fertig, Craig A. Wilson, Timothy J. Fritz
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Abstract
An insulation precursor composition comprises ethylene propylene diene monomer, an aramid, and a bromine-containing flame retardant. Rocket motors comprising a case, an energetic material within the case, and an insulation material comprising a reaction produce of ethylene propylene diene monomer, an aramid, and a flame retardant comprising bromine are also disclosed. Related precursor compositions are also disclosed.
Claims20
An insulation precursor composition, comprising:
- a terpolymer of ethylene, propylene, and a non-conjugated diene in an amount of from about 45 weight percent to about 60 weight percent of the insulation precursor composition;
- an aramid in an amount of from about 5 weight percent to about 20 weight percent of the insulation precursor composition;
- one or more bromine-containing flame retardants chosen from ethylenebistetrabromophthalimide, decabromodiphenyl ethane, a bromine-containing diester/ester diol of tetrabromophthalic anhydride having the chemical formula C15H16O7Br4, tris(2,3-dibromoisopropyl) isocyanurate (C12H15Br6N3O3), tetrabromobisphenol A, tetrabromobisphenol A bis(2,3-dibromopropyl ether), a brominated styrene, or a combination thereof;
- one or more peroxide compounds;
- antimony trioxide in an amount of from about 4 moles to about 5 moles for every about 1 mole of bromine in the one or more bromine-containing flame retardants;
- and
- at least one of polybutadiene resin, a linear polybutadiene, and a low volatility trifunctional monomer,
- wherein after curing, the insulation precursor composition provides an insulation material having a heat protection performance suitable for use in a rocket motor.
An insulation precursor composition, comprising:
- a polymeric material in an amount of from about 45 weight percent to about 60 weight percent of the insulation precursor composition;
- an aramid in an amount of from about 5 weight percent to about 20 weight percent of the insulation precursor composition;
- a bromine-containing flame retardant comprising decabromodiphenyl ethane, ethylenebistetrabromophthalimide, ethylenebistetrabromophthalate, or a combination thereof;
- one or more peroxide compounds;
- antimony trioxide in an amount of from about 4 moles to about 5 moles for every about 1 mole of bromine in the bromine-containing flame retardant;
- and
- polybutadiene,
- wherein after curing, the insulation precursor composition provides an insulation material having a heat protection performance suitable for use in a rocket motor.
An insulation precursor composition, comprising:
- a terpolymer of ethylene, propylene, and a non-conjugated diene in an amount of from about 45 weight percent to about 60 weight percent of the insulation precursor composition;
- poly-p-phenylene terephthalamide in an amount of from about 5 weight percent to about 20 weight percent of the insulation precursor composition;
- one or more of ethylenebistetrabromophthalimide and decabromodiphenyl ethane;
- one or more peroxide compounds;
- antimony trioxide in an amount of from about 4 moles to about 5 moles for every about 1 mole of bromine in the one or more of ethylenebistetrabromophthalimide and decabromodiphenyl ethane;
- and
- at least one of polybutadiene resin, a linear polybutadiene, and a low volatility trifunctional monomer,
- wherein after curing, the insulation precursor composition provides an insulation material having a heat protection performance suitable for use in a rocket motor.
Dependencies are inferred from the claim text.