US2007215267A1PendingUtilityA1

Joint fill composition and method

40
Individually held — no corporate assignee on recordPriority: Mar 8, 2004Filed: May 4, 2007Published: Sep 20, 2007
Est. expiryMar 8, 2024(expired)· nominal 20-yr term from priority
Inventors:Scott Brown
F16L 59/20C08G 2110/0083F16L 9/153C08G 2110/0025C08G 18/5021B29C 44/1295B29C 44/1219
40
PatentIndex Score
0
Cited by
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References
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Claims

Abstract

A composition and method for protecting pipeline joints is disclosed. A mold covers the exposed pipeline joint. A reaction composition including a polyol, an isocyanate, and an ester, preferably 2,2,4-trimethyl-1,2-pentanediol diisobutyrate, is added to the mold and allowed to react to form a polymer.

Claims

exact text as granted — not AI-modified
1 - 12 . (canceled)  
   
   
       13 . A method for filling a gap at the junction between two lengths of coated pipe, the method comprising: 
 enclosing the gap with a mold having an opening;    introducing a composition comprising polyol, isocyanate, and an ester diluent into the mold; and    allowing the composition to react and form a polymer.    
   
   
       13 . (canceled)  
   
   
       14 . The method of  claim 13 , wherein the isocyanate comprises polymeric MDI.  
   
   
       15 . The method of  claim 13 , wherein the ester comprises a diester.  
   
   
       16 . The method of  claim 13 , wherein the insoluable ester comprises 2,2,4-trimethyl-1,2-pentanediol diisobutyrate.  
   
   
       17 . The method of  claim 13 , wherein the composition further comprises water.  
   
   
       18 . The method of  claim 13 , wherein the composition further comprises hydrofluorocarbon blowing agent.  
   
   
       19 . The method of  claim 13 , wherein the composition further comprises hydrocarbon blowing agent.  
   
   
       20 . The method of  claim 13 , wherein the composition further comprises a silicone based surfactant.  
   
   
       21 . The method of  claim 13 , further comprising the step of removing the mold after formation of the polymer.  
   
   
       22 . The method of  claim 13 , wherein the polymer comprises a polyurethane foam having an open cell content of about eighty percent or higher.  
   
   
       23 . The method of  claim 13 , wherein the polymer comprises a polyurethane foam having an open cell content of about ninety percent or higher.  
   
   
       24 . The method of  claim 13 , wherein the polymer comprises a polyurethane foam having a density of between about 2 and about 12 pounds per cubic foot.  
   
   
       25 . The method of  claim 13 , wherein the polymer comprises an elastomeric polymer.  
   
   
       26 . The method of claim  3 , wherein the isocyanate comprises an isocyanate prepolymer.  
   
   
       27 . The method of  claim 13 , further comprising the step of adding filler material to the mold, after the enclosing step and before the step of introducing the reaction composition.  
   
   
       28 . The method of  claim 13 , further comprising the step of adding a permeable membrane into the mold before the step of introducing the reaction composition.  
   
   
       29 . (canceled)  
   
   
       30 . The method of  claim 13 , wherein the polyol comprises an amine based polyether polyol.  
   
   
       31 . The method of  claim 30 , wherein the ester diluent comprises 2,2,4-trimethyl-1,2-pentanediol diisobutyrate.  
   
   
       32 . The method of  claim 13 , wherein the polyol comprises an amine based polyether polyol.

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