Method of producing an expanded insulating layer for propellant

Details Method of producing an expanded insulating layer for propellant Method of producing an expanded insulating layer for propellant

1983-01-04

1984-09-25

Dawson, Robert A.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

156 79, 156322, 156334, B29C 2710

Patent

active

044735170

ABSTRACT:
An insulating layer is effected between a propellant charge in the interior walls of a combustion chamber of a rocket engine by applying an expandable plastic to the inside of the combustion chamber housing between the housing and the outer circumferential wall of the propellant charge then expanding the plastic. Advantageously the combustion chamber is preheated before introducing the charge and the expandable plastic into the combustion chamber. Preferably the ratio of the layer of the thickness of the expandable plastic to the spacing between the propellant charge and the walls of the combustion chamber ranges from 1 to 11/2; 1 to 1 and 1 to 3. The expandable plastic is advantageously a polybutadiene.

REFERENCES:
patent: 3056171 (1962-10-01), Fite
patent: 3308210 (1967-03-01), Ross
patent: 3489714 (1970-01-01), Sayles
patent: 3578520 (1971-05-01), Dolan et al.
patent: 3990369 (1976-11-01), Sayles
patent: 4337218 (1982-06-01), Byrd et al.

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