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LECO for Empowering Results
Solvay FM® 475 BMI Syntactic Core
Categories: Polymer; Thermoset; Bismaleimide (BMI)

Material Notes: FM® 475 is a BMI syntactic core material which is reinforced with hollow glass micro-balloons. FM 475 syntactic core is designed as a cost and/or weight saving alternative in the manufacture of thin [below 0.20 inches (5.1 mm) thick], stiffness critical composite panels. FM 475 syntactic core is based on CYCOM® 5250-4 resin chemistry to provide a high temperature capability with a service rating up to 425°F (218°C). It is compatible with CYCOM 5250-4 prepreg and other BMI resin systems. FM 475 will co-cure with these composites without the use of an adhesive film. Standard FM 475 is supplied with a 104 glass scrim as a carrier, which improves handling characteristics in addition to increasing the material’s flexural strength. Alternate carriers such as carbon, glass or Kevlar® mat can be provided upon request. FM 475 is supplied in sheet or roll form between two layers of release paper.

Features & Benefits:

  • Based on CYCOM 5250-4 bismaleimide resin chemistry
  • Service temperature from -67 to 400°F (-55 to 204°C)
  • Less than 3% volatiles evolved during cure
  • Can be co-cured with BMI prepreg and adhesive systems
  • Good tack and pliability
  • Can be supplied at various film thicknesses
  • Thin composite panels where weight, cost and/or stiffness are critical

Information provided by Cytec, subsequently acquired by Solvay.

Available Properties
  • Density
  • Volatiles
  • Storage Temperature
  • Tensile Strength, Flatwise, after 30 days at 71°C,100% RH
  • Tensile Strength, Flatwise
  • Tensile Strength, Flatwise
  • Tensile Strength, Flatwise
  • Compressive Strength, Block, 30 days in 5% salt solution at 95°F (35°C)
  • Compressive Strength, Block
  • Compressive Strength, Block, 90 days in hydraulic fluid at 75°F (24°C) MIL-H-5606
  • Compressive Strength, Block, 90 days in Jet A fuel at 75°F (24°C)
  • Compressive Strength, Block, 30 days in anti-icing fluid at 32°F (0°C)
  • Compressive Strength, Block, 90 days in lubricating oil at 290°F (143°C) MIL-L-7808
  • Compressive Strength, Block, 7 days in MEK at 75°F (24°C)
  • Compressive Strength, Block
  • Compressive Strength, Block
  • Maximum Service Temperature, Air
  • Glass Transition Temp, Tg
  • Gel Time
  • Shelf Life
Property Data

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Manufacturer Notes:
Solvay, former Rhodia Engineering Plastics

Category Notes

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