Method for the synthesis of energetic thermoplastic...

Details Method for the synthesis of energetic thermoplastic... Method for the synthesis of energetic thermoplastic...

2006-02-14

2006-02-14

Feely, Michael J. (Department: 1712)

Explosive and thermic compositions or charges

Structure or arrangement of component or product

Solid particles dispersed in solid solution or matrix

C528S059000, C528S065000

Reexamination Certificate

active

06997997

ABSTRACT:
A method is provided for preparing thermoplastic elastomers. A blocks of the thermoplastic elastomers are crystalline at temperatures below about 60° C. and are derived from oxetane derivatives and/or tetrahydrofuran derivatives. B blocks of the thermoplastic elastomer are amorphous above about −20° C. and are derived from oxetanes, tetrahydrofuran, oxiranes, and derivatives thereof. According to this method, the A and B blocks are dissolved into solution containing a non-halogenated solvent, preferably tetrahydrofuran, then dried by azeotropic distillation. The dried blocks are end-capped with a diisocyanate, preferably a diisocyanate having one isocyanate moiety substantially more reactive with the terminal groups of the blocks than the other isocyanate moiety of the diisocyanate. The end-capped blocks are then linked together with a linking compound.

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Copending U.S. Appl. No. 09/436,440: Sanderson et al.

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