Hydroxy terminated polybutadiene based polyurethane bound propel

Details Hydroxy terminated polybutadiene based polyurethane bound propel Hydroxy terminated polybutadiene based polyurethane bound propel

1977-09-26

1979-08-21

Hamrock, William F.

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

Synthetic resins

From reactant having at least one -n=c=x group as well as...

525124, 528 65, C08G 1832, C08G 1862, G08G 1869

Patent

active

041654218

ABSTRACT:
Salicylate esters have been found to be suitable blocking agents for polyisocyanates, enabling preparation of hydroxy terminated polybutadiene based polyurethane bound propellant grains having extended pot life. Unblocking occurs readily at normal propellant cure temperatures, allowing normal cure rates.

REFERENCES:
patent: 4098626 (1978-07-01), Graham et al.

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