Protective pipewrap system containing a rubber-based coating composition
AssigneeThe Kendall Company
InventorJordan D. Kellner
Life of this patent
Estimating the term…
Abstract
Novel rubber-based adhesive coatings adapted for use as a primer coating for pipelines, which coatings include a reagent which inhibits formation of hydroxide ions resulting from electrons generated by cathodic protection, and novel protective pipewrap systems including same.
Claims15
A protective pipewrap system for metal pipes consisting essentially of, in combination:
- (1) an adhesive layer consisting of a polyolefinic backing material carrying a layer of rubber-based adhesive;
- and
- (2) a primer coating comprising at least one elastomer, at least one tackifying resin, and a reagent which inhibits formation of hydroxide ions resulting from electrons generated by cathodic protection, said reagent being present in an amount effective to inhibit cathodic disbondment.
A method for protecting inground metal pipes wherein the surface of said pipe is first coated with a primer coating and thereafter an adhesive tape is applied over said primer coating to provide a protective pipewrap, said pipe being subjected to cathodic protection and said pipewrap in turn being subjected to cathodic disbondment,
- the improvement wherein said primer coating includes an effective amount of a reagent for inhibiting formation of hydroxide ions resulting from electrons generated by said cathodic protection, whereby to inhibit cathodic disbondment.
Dependencies are inferred from the claim text.