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Product description

EX-1515 cyanate ester prepreg is unique in the industry since it is able to achieve an extremely high level of cure conversion after a 121°C (250°F) cure. This level of conversion provides optimal mechanical properties, high radiation resistance, low moisture absorption / low outgassing while retaining unparalleled toughness, a low 118°C (244°F) stress-free temperature and long out time.

EX-1515 excels in its ability to resist microcracking, even when subjected to thermal cycling and high levels of radiation exposure. EX-1515 also displays low dielectric constant / low loss values similar to other cyanate esters which allow its use in radome and antenna applications.

EX-1515 can be post cured, free-standing, to increase its thermal performance for temperature critical structures.

Product benefits/features

  • 121°C curing cyanate ester system for low residual cure stresses
  • Postcurable for higher Tg

Market segments

  • Space & Satellite
  • Radome


Product category Thermoset Prepreg
Processing Press forming
Post curable
Resin type Cyanate Ester
Tg (Dry, onset) 174 °C / 345 °F
Cure temperature (Optimal) 121 °C / 250 °F
Cure temperature (Lowest) 107 °C / 225 °F
Cure temperature (Highest) 121 °C / 250 °F
Out time 7 days
Post curable

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