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Structural BMI Resin SB332

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Description

SB332 is a one part low viscosity bismaleimide infusion resin developed for high temperature composite parts with service temperature up to 200°C. The resin is characterized by low viscosity at impregnation and molding temperatures (100 cP at 120°C), which makes it possible to obtain CFRP with low porosity. Pre-curing at 190 °C allows to remove composite tool from plastic model. Post-curing at 230°С provides service temperature composite part up to 200°. It shows the following features and properties:


  • Wide processing window > 2 hours at 120°C
  • Pre-curing at 190°С
  • Post-curing at 230°C
  • Glass transition temperature 270°C
  • High mechanical performance
  • This material data has been provided by Matmatch.

    "Typical" values were obtained via a literature search. "Predicted" values were imputed via artificial intelligence technology. While we have placed significant efforts in ensuring data accuracy, "typical" and "predicted" data should be considered indicative and verified by appropriate material testing. Please do contact us if additional information on the the predicted data method is required.
    All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
    Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.

    Ashby charts

    Properties

    General

    PropertyTemperatureValueComment

    Water absorption

    23.0 °C

    4.6 %

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    for 54h to boiling water

    Mechanical

    PropertyTemperatureValueComment

    Elastic modulus

    23.0 °C

    4.4 GPa

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    ASTM D638

    Flexural strength

    23.0 °C

    165 MPa

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    ASTM D790

    Plane-Strain Fracture Toughnes

    23.0 °C

    0.84 MPa·√m

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    ASTM D5045

    Tensile strength

    23.0 °C

    85 MPa

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    ASTM D638

    Strain energy release

    ASTM D5045

    Thermal

    PropertyTemperatureValueComment

    Coefficient of thermal expansion

    23.0 °C

    5.1E-5 1/K

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    ASTM E831

    Glass transition temperature

    280 °C

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    ASTM E2092

    Technological properties

    Property
    Application areas

    Resins for Composite Materials

    Processing methods

    Assemble the vacuum bag. Perform a leak test, the rate of the vacuum drop should not be more than 1 mbar per minute. The residual pressure in the bag must not be more than 10 mbar. Assemble the second vacuum bag, put airweave material between the layers of the vacuum film. Perform a leak test for the second vacuum bag. The residual pressure in the bag must not be more than 10 mbar. Degas for 20-30 minutes, at 100-120°C, at a pressure of no more than 10 mbar. During the degassing, the resin should be stirred intensively. Heat the tool up to 120-130°C. Maintaining the temperature of resin dispenser at 120°C, start the infusion process. After complete impregnation of the bag, close the resin inputs, but continue evacuation from the inner bag for at least 30 minutes. Then close the outputs from the inner bag. Maintain the outer vacuum bag until the end of curing process. Increase the temperature at a rate of 2°C/min to 160°C. Dwell at 160°C for 3 hours, heat to 190°C at a rate of 2°C/min, dwell at 190°C for 3 hours. It is possible to heat up to 190°C without exposure at 160°C, in the case that the auxiliary materials and mold materials withstand such conditions. Before removing the part, cool the mold to at least 90°C at a speed of no more than 5°C/min. Post-cure can be performed without tooling. Heat to 180°C at a rate of 2°C/min, from 180°C to 230°C, heat to 190°C at a rate of 0.5°C/min dwell 5 hours at 230°C. Do not cool faster than 5°C/min. For the measurement of vacuum, the use of absolute pressure sensors is recommended.