Joint fill composition and method
AssigneeBaysystems North America LLC
InventorScott A. Brown
Life of this patent
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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.
Claims30
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 joint filling composition into the mold;
- and
- allowing the joint fill composition to react and form a foam;
- wherein the joint filling composition comprises:
- an A-side component comprising between about 75 weight % to about 85 weight % of polymeric MDI and between about 15 weight % and about 25 weight % 2,2,4-trimethyl-1,2-pentanediol diisobutyrate;
- and
- as B-side component comprising between about 35 weight % and about 45 weight % of amine based polyether polyol, and about 50 weight % to about 65 weight % 2,2,4-trimethyl-1,2-pentanediol diisobutyrate.
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.
The method of claim 13, wherein the polyol comprises an amine based polyether polyol.
A reaction composition for infilling a gap at the junction between two lengths of coated pipe, comprising:
- an A-side component comprising polymeric MDI and 2,2,4-trimethyl-1,2-pentanediol diisobutyrate;
- and
- a B-side component comprising an amine based polyether polyol, and 2,2,4-trimethyl-1,2-pentanediol diisobutyrate.
Dependencies are inferred from the claim text.