Patent ID: 6554936
Filing Date: 2003-04-29
Classification: C08K,C08L,F02K,F05D

Abstract:
A method of constructing an internally insulated metal dome structure of an open-ended rocket motor, comprising:disposing a shear-ply layer formed of a preselected curable elastomeric material onto at least a selected portion of an inner surface of a dome structure; curing and bonding the shear-ply layer to the at least a selected portion of the inner surface of the dome structure; preforming a first dome insulator of a phenolic composite material comprising fibers impregnated with a preselected curable resin and generally having an outer surface and an inner surface; precuring the first dome insulator; machining at least a portion of the first dome insulator; positioning and bonding the machined portion of the first dome insulator onto a selected portion of an inner surface of the shear-ply layer, the first dome insulator positioned and bonded onto the inner surface of the shear-ply layer such that the shear-ply layer extends slightly forward of the first dome insulator; forming in situ a second dome insulator onto at least a portion of the inner surface of the dome structure and onto at least a portion of the inner surface of the shear-ply layer longitudinally proximate to the first dome insulator by laying up a sheet material comprising acrylonitrile butadiene rubber, zinc borate, a curable resin, tetramethyl thiuram disulfide, and stearic acid; and bonding the second dome insulator onto the at least a portion of the inner surface of the dome structure and onto the at least a portion of the inner surface of the shear-ply layer.