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- January 28, 2019 Create Date
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Hypro reactive liquid polymers (RLP) are recognized as tougheners for thermoset resins specifically of the epoxy variety. In such formulations these CTBN or ATBN liquid polymers typically would be used at a level of 10-20 phr (parts per hundred resin). The stress-strain properties associated with elastomer toughened epoxies don’t differ appreciably from that of an unmodified epoxy resin although its tensile elongation might be somewhat greater. The defining property for an elastomer toughened epoxy is enhanced fracture surface energy. This bulletin does not address elastomer toughened epoxy resins.