Cold shrinkable article including an epichlorohydrin composition

Abstract

A tubular cold shrinkable material can include an elastomeric composition including an epichlorohydrin composition, where the elastomeric composition is substantially free of a fluoroelastomer composition. The tubular cold shrinkable material can further include a filler material including a reinforcement-grade carbon black. The tubular cold shrinkable material can further include a peroxide curative.

1 . An article of manufacture comprising:
 a tubular cold-shrinkable material including:
 an elastomeric composition, the elastomeric composition comprising a epichlorohydrin composition, and the elastomeric composition being substantially free of an fluoroelastomer composition; 
 a filler material, wherein the filler material comprises a reinforcement-grade carbon black; and 
 a peroxide curative. 
   
     
     
         2 . The article as defined by  claim 1 , wherein the quantity of filler material is in the range of about 10 phr to about 25 phr, and wherein the quantity of peroxide curative is in the range of about 0.5 phr to about 4.0 phr. 
     
     
         3 . The article as defined by  claim 1 , wherein the reinforcement-grade carbon black comprises carbon black having an average particle size of less than about 40 nm. 
     
     
         4 . The article as defined by  claim 1 , wherein the filler material further comprises a silica. 
     
     
         5 . The article as defined by  claim 1 , wherein the filler material further comprises a silane treated fumed silica. 
     
     
         6 . The article as defined by  claim 1 , wherein the filler material further comprises a Teflon composition. 
     
     
         7 . The article as defined by  claim 1 , wherein the tubular cold shrinkable material further comprises a cross-linking agent or cross-linking co-agent. 
     
     
         8 . The article as defined by  claim 1 , wherein the article exhibits an elongation greater than about 550% and a permanent set of less than about 25% at room temperature. 
     
     
         9 . The article as defined by  claim 1 , wherein the article exhibits an elongation greater than about 300% and a permanent set of less than about 25% at 130 degrees Celsius. 
     
     
         10 . The article as defined by  claim 1 , wherein the article exhibits an elongation greater than about 275% and a permanent set of less than about 25% at 150 degrees Celsius. 
     
     
         11 . The article as defined by  claim 1 , wherein the cold shrinkable material does not tear while being held for seven days in a 200% radially expanded state at 150 degrees Celsius. 
     
     
         12 . The article as defined by  claim 1 , further comprising a removable core disposed inside the tubular cold shrinkable material, the removable core supporting the cold shrinkable material in an expanded state. 
     
     
         13 . The article defined by  claim 1 , wherein the cold shrinkable material exhibits less than about a 25% weight increase when immersed in diesel fuel for 24 hours at a temperature of about 49 degrees Celsius. 
     
     
         14 . The article defined by  claim 1 , wherein the cold shrinkable material exhibits less than about a 10% weight increase when immersed in hydraulic fluid for 24 hours at a temperature of about 71 degrees Celsius. 
     
     
         15 . The article defined by  claim 1 , wherein the cold shrinkable material further comprises an energy beam absorbent and an energy beam induced indicia charred on an external surface of the cold shrinkable material responsive to application of a focused energy beam on the energy beam absorbent. 
     
     
         16 . The article defined by  claim 1 , wherein the cold shrinkable material includes a plurality of elastomeric members having walls that define elongate cavities through each elastomeric member, the cavities being in communication with each other.