Process for the manufacture of synthetic polymer propellant syst

Details Process for the manufacture of synthetic polymer propellant syst Process for the manufacture of synthetic polymer propellant syst

1990-10-30

1993-01-19

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

521 78, 521 79, 521 82, 521 88, 521 98, 521910, C08J 928

Patent

active

051807530

ABSTRACT:
Compositions and a process for manufacture are provided for synthetic polymer-propellant systems that form cohesive foamed structures from which aqueous solutions can be expressed, where the useful temperature range over which these structures form is broadened by using a propellant mixture consisting predominantly of a propellant that is a poor solvent for the polymer and has a vapor pressure in the range of 10-35 psig at 20 C in combination with a small amount of a propellant that is a good solvent for the polymer; and where these coherent foamed structures can be formed even with aqueous solutions containing 0 to about 30% alcohol, provided that insoluble fine-particle solids that do not pack and become difficult to redisperse are included in the composition.

REFERENCES:
patent: 3912667 (1975-10-01), Spitzer et al.
patent: 4328319 (1982-05-01), Osipow et al.
patent: 4432920 (1984-02-01), Ishikawa et al.

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