250-300°F (121-149°C) Cure Epoxy Resin System Typical applications UAV spars Marine masts Wind blade spar-caps Out life 30 days at 70°F (21°C) Shelf life 6 months at 40°F (4°C) 12 months at 0°F (-18°C) Description 307 is a 250-300°F (121-149°C) cure, highly toughened, controlled flow epoxy resin system specifically designed for thick parts. Versatile processing, excellent mechanical properties, and long out time make 307 suitable for a variety of applications. Benefits/features • Low exotherm • Scorch-resistant • High toughness • Excellent mechanical properties Application The low exotherm properties of 307 make it an ideal product for UAV spars, marine masts, wind blade spar-caps, and other applications where very thick parts are required. It is well suited for low pressure, vacuum bag molding techniques. 307 can be supplied with most commercially available fibers (carbon, quartz, aramid, S-glass, E-glass, etc.) in both woven form (designated as NB) as well as unidirectional tape (designated as NCT). Woven fabrics are available in standard commercial widths up to 60 inches (1.5 m). Unitape widths up to 39 inches (1 m) are available in standard fiber weights ranging from 70-300 gsm (0.014-0.060 psf). Recommended processing conditions 307 is typically cured at 250-300°F (121-149°C) depending on part size and complexity. Low, medium and high pressure molding techniques may be used for curing. Recommended cure cycle is 50 psi (345 kPa); 3°F (1.7°C)/min ramp to 275°F (135°C); hold for 90-120 minutes, cool to <140°F (60°C). ©2016 Mitsubishi Chemical Carbon Fiber and Composites, Inc. All rights reserved PL-307 - 051916

Neat resin [values are average and do not constitute a specification] Specific gravity Outgassing properties tested in accordance with ASTM E595 Property Average value TML (Total mass loss) Average value WVR (Water vapor recovered) Percent CVCM (Collected volatile condensable materials) Mechanical data [values are average and do not constitute a specification] HS40 Uni carbon, 145gsm, 35%RC, autoclave cured, 60psi, 120min at 275°F, norm. to 60%FV Property 0° Tensile strength, ksi (MPa) 0° Tensile modulus, Msi (GPa) 0° Compressive strength, ksi (MPa) 0° Flexural strength, ksi (MPa) 0° Flexural...

TA - AR2000 parallel plate rheometer Gel curve Gel time vs temp 250 260 270 280 290 300 The information contained herein has been obtained under controlled laboratory conditions and are typical or average values and do not constitute a specification, guarantee, or warranty. Results may vary under different processing conditions or in combination with other materials. The data is believed to be reliable but all suggestions or recommendations for use are made without guarantee. You should thoroughly and independently evaluate materials for your planned application and determine suitability...