Claims
- 1. In an insulating liner for a solid rocket propellant motor comprising a vulcanizable elastomeric composition, about 5 to 25 parts vulcanizing agents per 100 parts elastomer, about 5 to 20 parts aramid polymer fiber per 100 parts elastomer and about 5 to 20 parts powder filler per 100 parts elastomer, the improvement which comprises about 10 to 25 parts per 100 parts elastomer of a bond promotor selected from the group consisting of celulosic fiber treated with a resorcinol-formaldehyde latex and a multifunctional aromatic epoxy resin having repeating groups of the formula ##STR2##
- 2. The composition of claim 1 containing 100 parts polyisoprene, 12 parts precipitated, hydrated amorphous silica, 13 parts aramid polymer fiber, 4 parts zinc oxide, 5 parts 2.5-dimethyl-2,5-di(t-butylperoxy)hexane and 21 parts of said epoxy resin.
- 3. The composition of claim 1 containing 100 parts fluoroelastomer, 14 parts precipitated, hydrated amorphous silica, 11 parts aramid polymer fiber, 9 parts lead oxide, 3 parts N,N'-dieinnamylidene-1,6-hexanediamine, and 12 parts of said epoxy resin.
- 4. The composition of claim 1 containing 100 parts fluoroelastomer, 14 parts precipitated, hydrated amorphous silica, 11 parts aramid polymer fiber, 9 parts lead oxide, 3 parts N,N'-dieinnamylidene-1,6-hexanediamine and 12 parts of said treated cellulosic fiber.
- 5. The composition of claim 1 containing 100 parts fluoroelastomer, 10 parts precipitated, hydrated amorphous silica, 11 parts aramid polymer fiber, 9 parts lead oxide, 3 parts N,N'-dieinnamylidene-1,6-hexanediamine and 20 parts of said treated cellulosic fiber.
- 6. The composition of claim 1 containing 80 parts chlorosulfonated polyethylene, 20 parts 1,2-polybutadiene, 14 parts precipitated, hydrated amorphous silica, 15 parts aramid polymer fiber, 10 parts lead oxide, 2 parts N,N'-m-phenylenedimaleimide, 2 parts butyraldehyde/aniline condensation product, 4.4 parts 2,5-dimethyl-2,5-di(t-butylperoxy)hexane, 2 parts methylene donor and 18 parts of said treated cellulosic fiber.
RIGHTS OF THE GOVERNMENT
The invention described herein may be manufactured and used by or for the Government of the United States for all governmental purposes without the payment of any royalty.
US Referenced Citations (5)