L-552
Laminating Prepreg, High Temperature
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Product Data Sheet Revised 12/22/06
Description

L-552 is an excellent high temperature modified epoxy prepreg which exhibits outstanding performance at temperatures up to 400°F (204°C). L-552 is ideally suited for applications on lightweight advanced aircraft for fairings, inlet ducting, leading edges, control surfaces, pylons, and radomes. L-552 is moisture resistant and has excellent compatibility with graphite epoxy systems as a load transfer medium into adjacent metallic structure.

Advantages of L-552
  • L-552 has an excellent balance between toughness, high temperature strength, and weatherability.
  • L-552 may be co-cured with many of today’s graphite/epoxy prepreg systems to form load transfer interfaces.
  • L-552 is also supplied on lightweight fiberglass fabric for use as a surfacing ply for graphite/epoxy laminates and facesheets to improve their damage tolerance.
  Physical Properties on 7781 Glass Fabric
  • Standard Weight: 0.095 lbs/ft2 (464 g/m2)
  • Standard Resin Content: 36% by weight
  • Volatile Content: Less than 0.5%
  • Standard Tack: Slightly tacky on one side
  • Cured Ply Thickness: 0.010” (0.254 mm)
  • Other Weights, Resin Contents, and Fabrics are Available.
 Availability
  • Up to 60" width in rolls up to 100 yards long (152 cm x 91 m)
  Shelf Life
  • 6 months at 40°F (4°C) or below
  • 30 days at Room Temperature (70°F or 21°C)
 Cure Cycles
  • 60 minutes at 350°F (177°C)
Optional Cure Cycles:
  • 2 hours at 300°F (149°C), or
  • 90 minutes at 325°F (163°C)

NOTICE:Product data and parameters cited in this publication have been obtained in J.D. Lincoln, Inc. laboratories using the materials under carefully controlled conditions. The information, therefore, is believed to be accurate and correctly stated. Data of this type may be considered to be indicative of representative properties obtainable. J.D. Lincoln, Inc. cannot accept responsibility for the misapplication of these products, nor for their use under uncontrolled conditions. Numerical values resulting from the application of this material are dependant on processing details. It is recommended that the user develop his or her own application techniques and generate data consistent with his or her specific application and process.

 
       
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