Plastic and nonmetallic article shaping or treating: processes – Explosive or propellant article shaping or treating – Forming or treating particulate material
Patent
1985-10-21
1986-07-01
Nelson, Peter A.
Plastic and nonmetallic article shaping or treating: processes
Explosive or propellant article shaping or treating
Forming or treating particulate material
149 194, 149 1991, 149 76, C06B 2100
Patent
active
045979243
ABSTRACT:
A process is disclosed for improving the mechanical properties and procesility of thermoplastic composite propellants achieved by incorporation in the propellant of from about 0.1% to 1.0% of an organic titanate of the general formula Ti(OR).sub.4, where R represents a common alkyl group.
The process comprises dissolving in an excess amount of a volatile organic solvent a thermoplastic elastomer which consists of hard segments having substantially crystalline properties and soft segments having substantially amorphous properties. The hard segments impart rigid properties to a solid propellant composition with which it is combined, and the soft segments imparting rubbery properties to a solid propellant composition with which it is combined.
The Ti(OR).sub.4 functions as a medium between the surface of the ammonium perchlorate (AP) oxidizer and the thermoplastic elastomer to improve processability and to provide a bonding substrate to enhance the adhesive bond between the AP and the thermoplastic elastomer. After solvent removal, the propellant pellets are heat formed in a mold, the mold is cooled, and the molded product is released in the form of a solid propellant grain.
REFERENCES:
patent: 3894894 (1975-07-01), Elrick
patent: 3907619 (1975-09-01), Elrick
patent: 4084993 (1978-04-01), Cook
patent: 4430131 (1984-02-01), Tremblay
patent: 4486317 (1984-12-01), Sandell
Allen Henry C.
Clarke Frederick W.
Bush Freddie M.
Gibson Robert P.
Lane Anthony T.
Nelson Peter A.
The United States of America as represented by the Secretary of
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