Elastomeric insulating composition for a solid propellant...

Details Elastomeric insulating composition for a solid propellant... Elastomeric insulating composition for a solid propellant...

2005-10-11

2005-10-11

Szekely, Peter (Department: 1714)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

At least one aryl ring which is part of a fused or bridged...

C524S434000, C524S436000, C524S437000, C524S492000, C524S493000, C524S515000, C524S574000

Reexamination Certificate

active

06953823

ABSTRACT:
Non-asbestos elastomeric insulating materials for solid propellant rocket motors are disclosed. The insulating materials are composed of EPDM rubber, polyaramide fiber, liquid EPDM rubber, magnesium hydroxide or aluminum hydroxide, silicon dioxide, chlorinated flame retardant compound and zinc hydroxystannate. The char forming organic fiber is used to substitute asbestos in traditional insulating materials that are believed to cause serious environmental problems. These fillers in the formulation, which when combined, have a synergistic effect that reduces the ablation rate significantly. Also, use of zinc hydroxystannate to substitute Sb2O3, may further reduce density of the insulator and smoke density and smoke toxicity of exhausted gas from the rocket motor.

REFERENCES:
patent: 2002/0018847 (2002-02-01), Guillot

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