Solid propellants containing polyether or polyester binders

Details Solid propellants containing polyether or polyester binders Solid propellants containing polyether or polyester binders

1976-07-21

1979-05-29

Pertilla, Theodore E.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

149 199, 149 1991, 26034862, 26034812, 260836, 526 15, 526 21, 526 22, 526 53, 526 54, 560 89, 560 93, C08L 6300

Patent

active

041567005

ABSTRACT:
Useful hydroxyl-terminated polyolefin prepolymers, e.g. polybutadiene prepolymers, are provided which may be cross-linked with an epoxide to yield a polyether elastomeric material or with a mixture of an anhydride and an epoxide to form a polyester material. One such prepolymer is a carboxyl-terminated polyolefin, e.g. polybutadiene prepared by reacting a hydroxy-terminated polyolefin, e.g. polybutadiene with solid or liquid anhydrides. Polyether and polyester propellants containing up to about 88% of solid ammonium perchlorate in the powder form and aluminum powder may be prepared from the above two materials (binders). The physical and mechanical properties from these propellants depend on the ratios and on the order of addition of each ingredient, the curing temperature and the presence of surface-active agents. Polyester propellants may be made either by using the hydroxy-terminated polyolefin, e.g. polybutadiene prereacted with anhydrides or by mixing simultaneously all ingredients with the solids. Polyester propellants made by the former procedure have superior properties to those made from the latter. Polyether propellants have slightly lower mechanical and physical properties than those of polyesters. These properties are strongly dependent on the catalytic activity of ammonium perchlorate.

REFERENCES:
patent: 3427255 (1969-02-01), Case
patent: 3734786 (1973-05-01), Walden et al.
patent: 3902935 (1975-09-01), Wall
patent: 3975314 (1976-08-01), Smyk et al.

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