Bayflex® WR-80

Category: PUR-Ether/MDI , Polyurethane (Polyether, MDI)
Manufacturer: Covestro - PUR
Trademark: Bayflex®
Fillers: -
Ports: Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms FOB, CIF, DAP, DAT, DDP
PDF: vwvgXe_Bayflex-WR-80.pdf
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Bayflex WR-80 is a solid elastomer which has a flexural modulus of 10,000 psi (69 MPa) at room temperature. It is processed on reaction injection molding (RIM) equipment and is used for rollers, gaskets, and encapsulated windows. This system combines rapid demold times, excellent integrity at demold, improved release characteristics, and outstanding physical properties. The Bayflex WR-80 system was developed to add a weather-resistant grade to our range of window encapsulation systems.

In some cases, the weatherability of this system eliminates the need for post-painting or in-mold coatings. This product is available only in black. Bayflex WR-80 is a formulated RIM system supplied as two reactive liquid components. Component A is a diphenylmethane diisocyanate (MDI) prepolymer, and component B is a polyether polyol. As with any product, use of the Bayflex WR-80 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.
General Information
Features
  • Good weather resistance
  • Good demoulding performance
Uses
  • Washer
  • Roller
  • Doors and Windows
Appearance
  • Black
Forms
  • Liquid
Processing Method
  • Reaction Injection Molding (RIM)
PhysicalNominal ValueUnitTest Method
Specific Gravity 1.03g/cm³ASTM D1622
Molding Shrinkage - Flow 1.5%Internal method
Water Absorption (24 hr)3.3%Internal method
Water absorption rate- 240 hr 6.4%Internal method
AgingNominal ValueTest Method
Weatherometer Aging - Delta E 114.0SAE J2527
ThermalNominal ValueTest Method
Low Temperature Brittleness (-50°C)No CrackingASTM D746
Additional InformationNominal ValueUnitTest Method
Water Immersion, Length Increase 1.4%Internal method
HardnessNominal ValueUnitTest Method
Durometer Hardness (Shore A)91ASTM D2240
MechanicalNominal ValueUnitTest Method
Flexural Modulus ASTM D790
    -30°C 215MPaASTM D790
    23°C 68.9MPaASTM D790
    65°C 45.5MPaASTM D790
ElastomersNominal ValueUnitTest Method
Tensile Strength (Break)17.2MPaASTM D412
Tensile Elongation (Break)300%ASTM D412
Tear Strength 279.2kN/mASTM D624
ThermosetNominal ValueUnitTest Method
Thermoset Components 3
    Component a Mixing ratio by weight: 37
    Component B Mixing ratio by weight: 100
Demold Time 0.50min
Additional InformationNominal ValueUnitTest Method
Part A Type: Isocyanate Specific Gravity @ 25°C: 1.21 Viscosity @25°C: 700 mPa-s Flash Point PMCC: 213 °C Part B Type: Polyol Specific Gravity @ 25°C: 1.02 Viscosity @25°C: 1400 mPa-s Flash Point PMCC: 184 °C Molding Parameters Material Temperature: 32 to 42 °C Mold Temperature: 60 to 70 °C
Note Message
1 .ASTM G155, cycle 7 @ 2500 kJ/m², Atlas CXW Open Flame
2 .C mould
3 .105 Index
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