Boron nitride filled ptfe

Abstract

A composition is provided that, in one aspect, may be used in the production of sealing materials, such as gaskets. The composition includes a polytetraflouroethylene matrix and a Boron Nitride filler. In one aspect, the Boron Nitride filler may be provided as a hexagonal, close-packed, Boron Nitride filler that is homogeneously dispersed within the polytetraflouroethylene matrix. In at least one embodiment, the composition is formed by combining quantities of polytetraflouroethylene, Boron Nitride filler, hydrocarbon liquid, and solvent. The liquid and solvent may be removed through various processes prior to sintering the composition to form a full-density, Boron Nitride filled, polytetraflouroethylene matrix that exhibits improved sealability, greater resistance to permeation, and less color contamination.

1 - 9 . (canceled) 
     
     
         10 . A composition that may be used to form sheet gasketing material, the composition at least initially comprising:
 a quantity of polytetraflouroethylene;   a quantity of Boron Nitride filler;   a quantity of a hydrocarbon liquid; and   a quantity of solvent.   
     
     
         11 . The composition of  claim 10  wherein said quantity of Boron Nitride filler approximates 20% by weight of the composition. 
     
     
         12 . A sheet gasketing material comprising:
 a polytetraflouroethylene matrix; and   a hexagonal close packed Boron Nitride filler.   
     
     
         13 . The sheet gasketing material of  claim 12  wherein said Boron Nitride filler approximates 20% by weight of the sheet gasketing material. 
     
     
         14 . The sheet gasketing material of  claim 12  wherein said Boron Nitride filler is homogeneously dispersed within the polytetraflouroethylene matrix.