Channel sealant compositions
AssigneeThe United States of America as represented by the Secretary of the Air Force
InventorWarren R. Griffin
Life of this patent
Estimating the term…
Abstract
A sealant composition comprising a non-crosslinked, elastomeric mastic and an extrusion-inhibiting amount of vulcanized rubber particles of irregular shape and having sharp edges and angular surfaces. When the composition is used as a channel sealant, the ability of the particles to deform at structural gaps while offering resistance to extrusion prevents the loss of the elastomeric mastic.
Claims15
A channel sealant composition consisting essentially of (1) a non-crosslinked, hydrocarbon fuel-resistant, elastomeric mastic having the consistency of a caulking compound, said elastomeric mastic comprising an elastomer selected from the group consisting of fluorosilicone and cyanosilicone elastomers and (2) an extrusion-inhibiting amount of vulcanized elastomeric particles of irregular shape and having sharp edges and angular surfaces, the particles being formed from a vulcanizate of a hydro-carbon fuel-resistant elastomer selected from the group consisting of fluorosilicone and cyanosilicone elastomers, said vulcanizate having a tensile strength of at least 1000 psi and a hardness of at least 80 Shore A points.
Dependencies are inferred from the claim text.