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US 12,560,135 B2Granted
Precursor compositions for an insulation and related methods
AssigneeNorthrop Grumman Systems Corporation
InventorsHimansu M. Gajiwala, Steven B. Hall
Life of this patent
Estimating the term…
Abstract
A precursor composition comprising, before curing, ethylene propylene diene monomer (EPDM), an aramid, and a carbon material comprising carbon nanotubes, graphite, or a combination thereof. A rocket motor including a reaction product of the precursor composition and a method of insulating a rocket motor are also disclosed.
Claims14
A precursor composition, consisting of, before curing:
- ethylene propylene diene monomer (EPDM);
- an aramid;
- multi-walled carbon nanotubes in an amount of from about 15.0 parts by weight to about 30.0 parts by weight of the precursor composition;
- expandable graphite in an amount of from about 1.0 parts by weight to about 10.0 parts by weight of the precursor composition;
- a plasticizer;
- one or more of zinc oxide, silica, or magnesium hydroxide;
- a chlorinated organic compound;
- trimethylolpropane trimethacrylate or a poly(butadiene) resin;
- an antioxidant;
- a fatty acid;
- and
- a peroxide,
- wherein after curing, the precursor composition provides an insulation material exhibiting an ablative performance suitable for use in various regions of a rocket motor.
10 more elements
A precursor composition, comprising, before curing:
- ethylene propylene diene monomer (EPDM);
- poly-p-phenylene terephthalamide;
- multi-walled carbon nanotubes in an amount of from about 15.0 parts by weight to about 30.0 parts by weight of the precursor composition;
- expandable graphite in an amount of from about 1.0 parts by weight to about 10.0 parts by weight of the precursor composition;
- a five carbon petroleum hydrocarbon;
- magnesium hydroxide;
- a solid chlorinated paraffin;
- a poly(butadiene) resin;
- a hydroquinoline compound;
- a fatty acid;
- and
- 1,1-di-(t-butylperoxy)-3,3,5-trimethylcyclohexane or dicumyl peroxide,
- wherein after curing, the precursor composition provides an insulation material exhibiting an ablative performance suitable for use in various regions of a rocket motor.
10 more elements
A precursor composition, consisting of, before curing:
- ethylene propylene diene monomer (EPDM);
- poly-p-phenylene terephthalamide;
- multi-walled carbon nanotubes in an amount of from about 15.0 parts by weight to about 30.0 parts by weight of the precursor composition;
- expandable graphite in an amount of from about 1.0 parts by weight to about 10.0 parts by weight of the precursor composition;
- a five carbon petroleum hydrocarbon;
- magnesium hydroxide;
- a solid chlorinated paraffin;
- a poly(butadiene) resin;
- a polymerized 1,2 dihydro-2,2,4-trimethylquinoline;
- stearic acid;
- and
- dicumyl peroxide,
- wherein after curing, the precursor composition provides an insulation material exhibiting an ablative performance suitable for use in various regions of a rocket motor.
10 more elements
A precursor composition, consisting of, before curing:
- ethylene propylene diene monomer (EPDM);
- an aramid;
- multi-walled carbon nanotubes in an amount of from about 15.0 parts by weight to about 30.0 by weight of the precursor composition;
- expandable graphite in an amount of from about 1.0 parts by weight to about 10.0 parts by weight of the precursor composition;
- a plasticizer;
- one or more of zinc oxide, silica, or magnesium hydroxide;
- a chlorinated organic compound;
- a co-agent;
- an antioxidant;
- a fatty acid;
- and
- a peroxide,
- wherein after curing, the precursor composition provides an insulation material exhibiting an ablative performance suitable for use in various regions of a rocket motor.
10 more elements
Dependencies are inferred from the claim text.