PROPELLANT LOAD, WITH MECHANICALLY REINFORCED LINER/PROPELLANT CONNECTION, AND PREPARATION THEREOF

摘要

A propellant load includes a propellant block, containing energetic charges in a crosslinked binder, arranged in a structure having a thermal protection; the crosslinked binder being an energetic binder including a polymer, more polar than hydroxytelechelic polybutadiene (HTPB), which is crosslinked and an energetic plasticizer, the polymer non-crosslinked representing less than 14% of the volume of the propellant block; a bonding layer, based on crosslinked hydroxytelechelic polybutadiene (HTPB), between the thermal protection and the propellant block; and a system for mechanical reinforcement of the bonding layer/propellant block bond, present on at least part of the bonding layer/propellant block interface, including grains embedded in part in the bonding layer and the complementary part thereof being embedded in the propellant block: made of a pyrotechnically inert material, and that has a surface energy greater than 34 mJ/m2; and the largest dimension of which is between 0.3 and 5.2 mm.

主权项

1. A propellant load comprising:
a propellant block, containing energetic charges in a crosslinked binder, arranged in a structure of a substantially cylindrical shape with a sleeve, a rear end and a front end; said structure having a thermal protection attached to its an inner face of the structure, opposite said block; a bonding layer, based on crosslinked hydroxytelechelic polybutadiene (HTPB), between said thermal protection and said propellant block; and means for mechanical reinforcement of the a bonding layer/propellant block bond, wherein: said crosslinked binder of said propellant block is an energetic binder comprising a polymer, more polar than hydroxytelechelic polybutadiene (HTPB), which is crosslinked and an energetic plasticizer, said polymer non-crosslinked representing less than 14% of the volume of the propellant block; and said means for mechanical reinforcement of the bonding layer/propellant block bond, which are present on at least one portion of the a bonding layer/propellant block interface, comprise individualized grains embedded in part in said bonding layer and the a complementary part thereof being embedded in said propellant block: made of a pyrotechnically inert material that is unreactive with respect to the bonding layer and also with respect to the propellant, and that has a surface energy greater than 34 mJ/m2; a largest dimension of which is between 0.3 and 5.2 mm.