Process for obtaining a hydroxy-ended glycidil azine polymer

Details Process for obtaining a hydroxy-ended glycidil azine polymer Process for obtaining a hydroxy-ended glycidil azine polymer

1992-07-30

1994-06-07

Bleutge, John C.

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

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

552 11, C08K 528, C08G 6532, C08G 6524

Patent

active

053190378

ABSTRACT:
A process for obtaining a hydroxy-ended glycidyl azide polymer (GAP). The process consists in reacting polyepichlorohydrin (PECH) with a metallic azide in the presence of an organic solvent having a parameter of solubility comprised between 21 and 23.5 (MPa).sup.1/2 such as DMA or NMP. The use of any of the solvents mentioned sharply reduces the reaction time needed for substituting azide groups for the chlorine present in the PECH. Said reaction times can be less than 4 hours when NMP is used or less than 6 hours when DMA is used. The GAP thus obtained having a functionality equal to or above 2 can be used as energetic bonding agent in the formulation of solid propellants for rockets.

REFERENCES:
patent: 4268450 (1981-05-01), Frankel
patent: 4405762 (1983-09-01), Earl
patent: 4937361 (1990-06-01), Wagner
patent: 5130381 (1992-07-01), Ahad

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