Combustion inhibitor based on an aliphatic polyurethane elastome

Details Combustion inhibitor based on an aliphatic polyurethane elastome Combustion inhibitor based on an aliphatic polyurethane elastome

1985-05-17

1987-01-27

Nelson, Peter A.

Ammunition and explosives

Powder form

Having burning inhibiting means

149 3, 149 10, 149 11, 149 194, 149 1991, 149 97, 523180, C06B 4528, C06B 4522, C06B 4518

Patent

active

046387358

ABSTRACT:
The invention relates to a combustion inhibitor composition intended to cover partly the surface of blocks of double-base propellant. The inhibitor composition of the invention includes an aliphatic polyurethane obtained by the reaction of at least one polyisocyanate with a mixture of at least one polyetherpolyol containing at least three hydroxy groups per molecule and at least one polymer containing two hydroxy groups per molecule. This difunctional polymer is chosen from lactone polymers, such as poly-.epsilon.-caprolactone and polytetrahydrofuran. The inhibitor composition may also contain gasifiable fillers and an aliphatic plasticizer. The composition has good discreteness properties, while retaining excellent mechanical properties. The present invention has particular application in the field of solid weapon propulsion.

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