Document Type and Number:
Japanese Patent JPS6251947
Kind Code:
B2
Abstract:
Salicylate ester-blocked polyisocyanates are of formula (Ie (where X is an organic gp. of valency n+m; R is H or 1-10C alkyl; R1 is 1-10C alkyl or 6-10C aryl; n is >=1; m is 0 or 1; m+n is >=2). Used for reaction with polybutadiene with end OH gps. to form polyurethane prepolymers suitable as binders for rocket propellants. Pot life of the mixt. of binder and rocket fuel granules during casting at 28 degrees C is extended, which dissociation occurs at hardening temp., e.g. 63 degrees C, so that hardening time is not extended.
Inventors:
UIRIAMU EICHI GURAHAMU
INERA JII SHEPAADO
INERA JII SHEPAADO
Application Number:
JP20246983A
Publication Date:
November 02, 1987
Filing Date:
October 28, 1983
Export Citation:
Assignee:
THIOKOL CORP
International Classes:
C08G18/00; B01J31/00; C06D5/00; C06D5/06; C07C67/00; C07C239/00; C07C269/02; C07C271/08; C07C271/58; C08G18/69; C08G18/78; C08G18/80
Previous Patent: The medicine constituent containing compound-nucleus particles and it
Next Patent: VARIABLE INDUCTANCE COIL
Next Patent: VARIABLE INDUCTANCE COIL