Claims
- 1. A channel sealant composition consisting essentially of a non-crosslinked poly(fluoroalkoxy phosphazene) elastomeric mastic having the consistency of a caulking compound and an extrusion-inhibiting amount of vulcanized rubber particles of irregular shape and having sharp edges and angular surfaces, the particles being formed from a vulcanizate having a tensile strength of at least 1000 psi and a hardness of at least 80 Shore A points.
- 2. The composition according to claim 1 that comprises about 10 to 100 weight percent vulcanized rubber particles, based upon the weight of the mastic.
- 3. The composition according to claim 2 in which the vulcanized particles of irregular shape have sharp edges and angular faces ranging from about 0.010 to 0.040 inch.
- 4. The composition according to claim 3 in which the vulcanized rubber particles are formed from a vulcanizate having a tensile strength ranging from 1000 to 6000 psi and a hardness ranging from 80 to 95 Shore A points.
- 5. The composition according to claim 2 in which the particles are formed from a vulcanizate prepared from the same elastomer used as the mastic.
- 6. The composition according to claim 1 in which the vulcanized rubber particles are formed from a vulcanizate of a 3,3,3-trifluoro propyl (methyl) siloxane polymer.
RIGHTS OF THE GOVERNMENT
The invention described herein may be manufactured and used by or for the Government of the United States for all governmental purposes without the payment of any royalty.
US Referenced Citations (6)