Abstract: The invention relates to an insulation assembly designed for thermal protection of a structure, including three stacked layer of different types. The outer surface layer consists of a composite material with a mineral matrix, in particular made of clays capable of reacting in an aqueous medium, coating structural reinforcement fillers consisting of fibers, in particular as fabric, fiber layup, prepreg, mat, etc. The intermediate layer consists of a refractory mineral material such as a lightweight felt. The inner surface layer consists of a thermally insulating honeycomb material, in particular with a thermoplastic or thermosetting resin base. In addition, reflectors consisting of aluminized screen, can be provided at the interface of each layer.

Abstract: The invention concerns a sandwich designed for making multilayer structures resistant to impact and thermal aggressions of the type including a core 2 interposed between an external skin 1 and an internal skin 3.The external skin panel 1 consists of an assembly of at least three layers made integral by sealing or bonding: a first layer 4 made of composite material, a second layer 5 made of a synthetic cellular material with a low thermal conductivity coefficient, a third layer 6 obtained by lamination of a composite material. The second layer 5 consists of a honeycomb and the composite material of the first layer 4 and third layer 6 consists of glass fiber reinforced epoxy resin. A nonwoven polyester layer 7 is interposed between layers 4 and 5. The sandwich panel includes a metal sheet 8 adhering by cofusion to layer 5 via a thermal plastic film 9, said sheet being made of aluminum or aluminum alloy, steel or titanium which can be in the form of a film with a thickness below 1 mm.

Abstract: Pyrotechnic compositions having a decreased susceptibility to external influences are obtained by suspending pyrotechnic particles in a dilute solution of a coating polymer and adding a second polymer which is more soluble in the solvent, so that microdroplets of the coating polymer are formed, completely enclosing the pyrotechnic particles. The coated particles are hardened by exposure to air, optionally in the presence of a hardening catalyst.