Baydur® 684 (30 pcf)

Category: PUR, Unspecified , Polyurethane
Manufacturer: Covestro - PUR
Trademark: Baydur®
Fillers: -
Ports: Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms FOB, CIF, DAP, DAT, DDP
PDF: DdwC4I_Baydur-684-30-pcf-.pdf
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Baydur 684 is a rigid polyurethane structural foam system used in the reaction injection molding (RIM) process. The system is supplied as two reactive liquid components. Component A is a polymeric diphenylmethane diisocyanate (PMDI), and Component B is a formulated polyol system containing no CFC- or HCFC-blowing additives.

The Baydur 684 system is used for applications requiring high compression strength foams,filling cavities and/or producing foam cores for overmolding. As with any product, use of the Baydur 684 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.
General Information
Uses
  • Structural Foam
  • Foam
Forms
  • Liquid
Processing Method
  • Reaction Injection Molding (RIM)
HardnessNominal ValueTest Method
Durometer Hardness (Shore D, 12.7 mm)55ASTM D2240
MechanicalNominal ValueUnitTest Method
Tensile Strength (Break, 12.7 mm)9.17MPaASTM D638
Flexural Modulus (12.7 mm)595MPaASTM D790
Flexural Strength (12.7 mm)18.6MPaASTM D790
Compressive Strength (12.7 mm)14.0MPaASTM D695
ThermosetNominal Value
Thermoset Components
    Component a Mixing ratio by weight: 130
    Component B Mixing ratio by weight: 100
Additional Information
Part A Type: Isocyanate Specific Gravity @ 25°C: 1.24 Viscosity @25°C: 200 cps Part B Type: Polyol Specific Gravity @ 25°C: 1.08 Viscosity @25°C: 900 cps Machine Reactivity at 80°F Cream Time: 16 sec Gel Time: 55 sec Tack Free Time: 80 sec Free Rise Density: 5.6 pcf
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