Technical & Industrial Perspective:

Experimental Setup for Hydrogenation of HTPB:

The process was carried out in reactor with magnetically driven variable speed impeller (Fig.4). The process is carried out at room temperature for a period of 6h to 12h.

Catalyst details:

• Pd, Zr and charcoal in the catalyst is in the weight ratio of 2% to 5 % palladium, 5% to 8 % zirconium and 87% to 93 % charcoal based on total weight of catalyst. (Fig. 3)
• The amount of catalyst is in the range of 1.5 to 2.5 % of the hydroxyl terminated polybutadiene.
• Charcoal is activated charcoal.
• Organic solvent system is selected from isopropyl alcohol, toluene, cyclohexene, methanol, or combination thereof.

Utility:

• The present invention provides the use of the selectively partially hydrogenated hydroxyl terminated polybutadiene for the binder of a composite solid propellant system, polymer modification, synthesis of polyurethanes (thermoplastic and thermo-setting), encapsulants, adhesives and sealants, high temperature grease, and coatings etc.
• The composition and methods are effective in the synthesis of HHTPB in large scale for making solid propellant industries like ISRO, DRDO, Ordinance factories and others.