Park's Advanced Composite Materials Electromagnetic and Thermal Properties of Selected RF and Microwave Prepreg Systems > Resin / Reinforcement Cure Temp. ?F (?C) Dielectric Constant X-Bamd* Loss Tangent X-Bamd* Service Temp. ?F (?C) V-341 Polybutadiene/Quartz 350 (177) 3.1 0.001 200 (93) V-376 Cyanate Ester/Quartz 350 (177) 3.2 0.005 400 (204) V-376 Cyanate Ester/ Fiberglass 350 (177) 4.0 0.011 400 (204) E-761 Epoxy/Quartz 250 (121) 3.4 0.009 200 (93) E-761 Epoxy/Spectra® 225 (107) 2.7 0.004 180 (82) E-761 Epoxy/Fiberglass 250 (121) 4.2 0.013 200 (93) E-746 Hi-Temp. Epoxy/Quartz 350 (177) 3.6 0.012 500 (260) E-746 Hi-Temp. Epoxy/Fiberglass 350 (177) 4.2 0.016 500 (260) E-765 Epoxy/Quartz 250 (121) 3.4 0.015 275 (135) E-765 Epoxy/Fiberglass 250 (121) 4.5 0.020 275 (135) P-670I Polyesters/Fiberglass 250 (121) 4.0 0.014 250 (120) P-615 SuperVue/Spectra? 230 (110) 2.4 0.004 160 (71) S-860 Silicone/Fiberglass 350 (177) 4.2 0.013 500 (260) *Nominal values may vary subject to fiber volume and test technique.   Aeroglide™, CoreFix®, Easycure™, EF®, EP™, LD®, Mercurywave™, Nelco®, Nelcote®, Nova™, PeelCote™, RTFoil® and SI® are trademarks of Park Electrochemical Corp. Kevlar® is a registered trademark of E.I. du Pont de Nemours and Company. Spectra® is a registered trademark of Honeywell Performance Fibers.   If you have problems or questions contact webmaster@parkelectro.com www.parkelectro.com

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September 07, 2010