Thermoplastic elastomers having alternate crystalline structure

Details Thermoplastic elastomers having alternate crystalline structure Thermoplastic elastomers having alternate crystalline structure

1992-01-06

1993-05-11

Seidleck, James J.

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

Synthetic resins

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

525186, 525206, 525251, 525412, 525299, 528408, 528417, 149 196, C08G 6518, C08G 6520

Patent

active

052101533

ABSTRACT:
Novel block polymers which are thermoplastic elastomers which are thermoplastic elastomers are provided for use as binders in high-energy compositions such as propellants, explosives, gasifiers or the like. The block polymers have an ABA structure wherein the A blocks are crystalline at temperatures below 60.degree. C. and the B blocks are amorphous at temperatures above -20.degree. C. Both the A and B blocks are polyethers formed from monomers of oxetanes and/or tetrahydrofuran. The block polymers melt in the range of 60.degree. C. to 120.degree. C. and have low viscosities above their melting points due to mutual miscibility of the A and B blocks.

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