Delayed curing resin composition

• US 9,902,801 B1
• Filed: 10/17/2016
• Issued: 02/27/2018
• Est. Priority Date: 10/17/2016
• Status: Active Grant

• Current Assignee: Warren Environmental & Coating, LLC
• Original Assignee: Warren Environmental, Inc.
• Inventors: Warren, Danny
• Primary Examiner(s): Boykin, Terressa
• Application Number:
  US15/295,381
• Time in Patent Office: 498 Days
• Field of Search: 528193, 528194
• CPC Class Codes: C08G 59/02 Polycondensates containing more than one epoxy group per molecule
• CPC Class Codes: C08G 59/226 Mixtures of di-epoxy compounds
• CPC Class Codes: C08G 59/42 Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
• CPC Class Codes: C08G 59/502 Polyalkylene polyamines
• CPC Class Codes: C08G 59/621 Phenols
• CPC Class Codes: F16L 55/1651 the flexible liner being everted
• CPC Class Codes: F16L 55/1654 and being inflated
• CPC Class Codes: F16L 55/1656 materials for flexible liners hoses in general F16L11/00

Abstract

A resin composition and method for installing a pipe liner that allows the liner to be fully wet out with a resin and activator and stored for a period of up to six months prior to installation and curing. A method of lining a pipe with a delayed curing resin composition is also provided that includes fully wetting out a liner with a blended two part epoxy composition such that the liner can be transported in a wet out fashion, placed in a pipe to be lined and repositioned as needed without concern for the resin composition to begin curing.

Claims

1. A single component resin composition that is delayed in curing, the resin comprising:

a base containing cyclic anhydride, bisphenol A and bisphenol F resins; and

an activator preblend containing liquid bisphenol, granular bisphenol and tetraethylenepentamine,

wherein said activator preblend and base are fully blended providing a one component resin composition that can be mixed for an extended period of time and only cures when subjected to elevated temperature.

2. The single component resin composition of claim 1, wherein said single component resin remains liquid at temperatures below 160 degrees Fahrenheit.

3. The single component resin composition of claim 1, wherein said single component resin fully cures in one hour at temperatures above 170 degrees Fahrenheit.

4. A pipe lining composition that is delayed in curing, comprising:

a base containing cyclic anhydride, bisphenol A and bisphenol F resins;

an activator preblend containing liquid bisphenol, granular bisphenol and tetraethylenepentamine, wherein said activator preblend and base are fully blended; and

a pipe lining composite fully wet out with said fully blended activator and base providing a pipe lining composition that can be mixed for an extended period of time and only cures when subjected to elevated temperature.

5. The delayed cure, pipe lining composition of claim 4, wherein said activator preblend and base remains liquid at temperatures below 160 degrees Fahrenheit.

6. The delayed cure, pipe lining composition of claim 4, wherein said activator preblend and base fully cures in one hour at temperatures above 170 degrees Fahrenheit.