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    Physical Properties and Chemical Resistance of Selected Resins for Cured-in-Place Pipe Rehabilitation

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    This report is a summary of the basic chemistry, physical properties, and chemical resistance of six commercially available resins (i.e. vinyl ester, polyester, and epoxy) used for making cured-in-place pipe (CIPP). Flexural and tensile properties are included and chemical resistance from a one year study for each resin-system as a CIPP resin/felt composite in acids, bases, and oxidizing agents currently found or introduced into municipal sanitary sewer systems [1,2,3,4].

    Conclusions drawn from this report indicate the three different types of resin had measurably different flexural and tensile properties that ranged the from stiff, brittle behavior to very flexible. Among the test group the two polyesters were relatively stiff, the two epoxy vinyl esters had a balance of high stiffness and strength, one epoxy system was extremely flexible, while the other was similar to the epoxy vinyl esters. The one year chemical resistance also clearly distinguished the performance of the three types of resins. Overall, the two polyester resins performed at an intermediate level, the two epoxy vinyl ester resins demonstrated superior broad range chemical resistance, and the epoxy performance ranged from poor to excellent depending on the type of curing agent used.


    physical properties, chemical resistance, thermoset resins, cured-in-place pipe, pipe

    Author Information:

    Kleweno, DG
    Sr. Development Engineer, Chemical Resistance Application Development Labs, The Dow Chemical Company, Freeport, Texas

    Committee/Subcommittee: F17.62

    DOI: 10.1520/STP12667S