Stabilizing gelatin

Very weak base due to the presence of phenyl groups and useful as a stabilizer, gelatinizer and coolant. Also imparts better reliability to rocket propellant formulations. 

Acardites are compds developed in Germany as stabilizers-gelatinizers for NC in smokeless propellants. There are three acardites of which Acardite I was developed first... 

Acardite II was proposed in Germany as a stabilizer-gelatinizer in NC smokeless propellants. As a stabilizer, it was considered superior to Acardites III I and as a gelatinizer inferior to Acardite III but superior to Acardite l(Ref 3)... 

Composition A nitrocellulose smokeless powder produced in spherical form by a simplified process in which stabilization, gelatinization, and solvent recovery are carried out in one operation, P1J327. 

The styrene-DVB copolymer beads are prepared by suspension (pearl) polymerization technique. The monomers are mixed and a polymerization catalyst such as benzoyl peroxide is added. The mixture is then dispersed into small droplets in a thoroughly agitated aqueous solution that is kept at a temperature required for polymerization (usually 85°C-100°C). A suspension stabilizer (gelatin, polyvinyl alcohol, sodium oleate, magnesium silicate, etc.) in the aqueous phase prevents agglomeration of the droplets. The size of the droplets depends chiefly on the stabilizer, the viscosity of the solution, and the agitation, and it can be varied within wide limits. As polymerization takes place, the droplets are transformed into polymer beads. For most purposes, a bead size of 0.1-0.5 mm is preferred, but beads from 1 pm to 2 mm in diameter can be prepared without much difficulty. 

Y. Uesugi, H. Kawata, Y. Saito, Y. Tabata, Ultrasound-responsive thrombus treatment with zinc-stabilized gelatin nano-complexes of tissue-type plasminogen activator. Journal of Drug Targeting 20 (2012) 224-234. 

As explosive gelatine, when stored, sometimes allows the nitro-glycerine to ooze out, and is of no particular stability, gelatine dynamite is mostly used tor blasting purposes. 

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