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Bayflex® MP-25000

Polyurethane (Polyether, MDI)

Supplied by Bayer MaterialScience LLC

The technical datasheet with complete property values for Bayflex® MP-25000 is available to members of the Prospector Plastics Database.
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Product Description
Bayflex MP-25,000 is a solid elastomer which has a flexural modulus of 25,000 psi (172 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. As with any product, use of the Bayflex MP-25,000 system in a given application must be tested (including field testing, etc.) in advance by the user to determine suitability.

Bayflex MP-25,000 is a formulated RIM system supplied as two liquid components. Component A is a diphenylmethane diisocyanate (MDI) prepolymer, and Component B is a polyether polyol. Note: Component B should be agitated thoroughly prior to transfer of contents from the drum to the day tank.
General  
Material Status 
  • Commercial: Active
Availability 
  • North America
Features 
  • Good Mold Release
Uses 
  • Gaskets
  • Rollers
  • Windows & Doors
Forms 
  • Liquid
Processing Method 
  • Reaction Injection Molding (RIM)
Physical
Nominal Value
Unit
Test Method
Specific Gravity
 
 ASTM D792, ASTM D1622
Molding Shrinkage - Flow (0.118 in)
in/in
 Internal Method
Water Absorption (24 hr, 0.118 in)
%
 Internal Method
Water Absorption - 240 hr (0.12 in)
%
 Internal Method
Mechanical
Nominal Value
Unit
Test Method
Tensile Strength (Break, 0.118 in)
psi
 ASTM D638
Flexural Modulus
     ASTM D790
-22°F, 0.118 in
psi
  
73°F, 0.118 in
psi
  
149°F, 0.118 in
psi
  
Elastomers
Nominal Value
Unit
Test Method
Tensile Stress 2
     ASTM D412
20% Strain
psi
  
50% Strain, 0.118 in
psi
  
100% Strain, 0.118 in
psi
  
Tensile Strength (Break, 0.118 in)
psi
 ASTM D412
Tensile Elongation (Break, 0.118 in)
%
 ASTM D412
Tear Strength 3 (0.118 in)
lbf/in
 ASTM D624
Hardness
Nominal Value
Unit
Test Method
Durometer Hardness (Shore D, 0.118 in)
 
 ASTM D2240
Thermal
Nominal Value
Unit
Test Method
CLTE - Flow (0.118 in)
in/in/°F
 ASTM D696
Low Temperature Brittleness (-58°F, 0.12 in)
 
 ASTM D746
Thermoset
Nominal Value
Unit
Test Method
Thermoset Components 4
      
Part A
 
  
Part B
 
  
Shelf Life (86°F)
wk
  
Demold Time
min
  
Additional Information
Nominal Value
Unit
Test Method
Water Immersion, Length Increase (0.12 in)
%
 Internal 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: 1.03
  • Viscosity @25°C: 1200 mPa-s
  • Flash Point PMCC: 193 °C

Molding Parameters
  • Material Temperature: 32 to 42 °C
  • Mold Temperature: 65 to 75 °C
Related Terminology
Product names can be difficult to match. You may have searched any one of these terms to find this product: Bayflex® MP-25000, Bayflex MP25000, Bayflex® , Bayflex, BayflexMP25000, MP, MP-25000, MP25000, MP:25000, MP/25000, MP+25000, MP_25000, MP 25000, Polyurethane, Polyurethane (Polyether, MDI), Polyurethane Polyether MDI, PUR-Ether/MDI, PUREtherMDI, PUR-Ether:MDI, PUR-Ether+MDI, PUR-Ether-MDI, PUR-Ether_MDI, PUR-Ether MDI, PUR:Ether/MDI, PUR/Ether/MDI, PUR+Ether/MDI, PUR_Ether/MDI, PUR Ether/MDI, PUR, Bayer, PolyurethanePolyetherMDI, PUREther_MDI, PUREther MDI, PUR_EtherMDI, PUR EtherMDI, 25000MP
Features
Features may also be described by the following terms: Good Mold Release, Easy Release, Good Demolding.
Uses
Uses may also be described by the following terms: Rollers, Roller, Gaskets, Gasketing, Windows & Doors, Windows and Doors.
Notes
1Typical properties: these are not to be construed as specifications.
2Die C, 20 in/min
3Die C
4105 Index
 
IDES
Copyright © 2012 IDES
The information presented on this datasheet was acquired by IDES from the producer of the material. IDES makes substantial efforts to assure the accuracy of this data. However, IDES assumes no responsibility for the data values and strongly encourages that upon final material selection, data points are validated with the material supplier.