Patent ID: 11920541
Assignee: NORTHROP GRUMMAN SYSTEMS CORPORATION
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C  F | IPC C  F

Claim 15:
16. A rocket motor, comprising:
an insulation in a casing of a rocket motor;
a liner on the insulation, the liner comprising:
a reaction product of a liner polymer and a reactive curative; and
a blocked curative formulated to be substantially unreactive with the liner polymer,
the blocked curative comprising an isocyanate compound that has been pre-reacted with a blocking agent to substantially prevent the isocyanate compound from reacting with the liner polymer at room temperature, and
the blocking agent removed from the isocyanate compound of the blocked curative at an elevated temperature to generate a reactive isocyanate curing agent; and

a propellant on the liner, the propellant comprising:
a reaction product of a propellant polymer, the reactive isocyanate curing agent, and a propellant curative.