Patent ID: 7223801

Claim:
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 %, based on total weight of the A-side component, of polymeric MDI and between about 15 weight % and about 25 weight %, based on total weight of the A-side component, 2,2,4,-trimethyl-1,2-pentanediol diisobutyrate; and a B-side component comprising between about 35 weight % and about 45 weight %, based on total weight of the B-side component, of amine based polyether polyol, and about 50 weight % to about 65 weight %, based on total weight of the B-side component, 2,2,4-trimethyl-1,2-pentanediol diisobutyrate.