TECNOTHANE® MDE 249

TECNOTHANE® MDE 249 is an MDI-based polyurethane with a polyester backbone.

Polymer Name: Polyurethane (MDI-based)

End Uses: Industrial Parts, Rollers, Scraper, Screens, Sieves, Wheels

Technical Data Sheet
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Enhanced TDS

Identification & Functionality

Blend
No
Chemical Family
Polyurethanes (PU)
Polymer Name
Polyurethane (MDI-based)
Single Ingredient
Yes
Technologies
Plastics
Product Families
Plastics — Thermoset Resins
Polyurethanes

Applications & Uses

Plastics & Elastomers End Uses
Industrial Parts,
Rollers,
Scraper,
Screens,
Sieves,
Wheels
Markets
Industrial
Applications
Industrial — Oil, Gas & Mining
Mining
Application Information

Tecnothane® MDE249 has been designed to show excellent properties for parts working in harsh environments, requiring resistant and efficient materials. For this reason it fits particularly well with mining-grade and technical application, such as sieves, scrapers, screens, etc. and it shows a reaction profile oriented to mass production.

Technical Details & Test Data

Typical Properties

The purpose of the following table is only to provide indicative data about material properties. Typical properties are referred to samples prepared according to internal conditions and measured thirty days after casting.

ISO 7619-1  
Hardness (ShA) 60±2 65±2 70±2 75±2 80±2 85±2 90±2 95±2 > 98 > 98
Hardness (ShD) / / / / / 35±2 42±2 50±2 60±2 65±2
ISO 2781  
Density (g/cm3) 1.21 1.21 1.22 1.22 1.23 1.24 1.24 1.24 1.24 1.24
ISO 37 (Tensile)  
Modulus 50% (N/mm2) 1 2 2 3 3 4 6 9 18 25
Modulus 100% (N/mm2) 2 3 3 4 5 6 8 11 25 30
Tensile strength (N/mm2) 28 40 46 49 42 50 53 52 45 40
Elongation (%) 780 730 740 660 655 595 575 550 450 430
ISO 34-1 (Tear strength)  
DIE B/a (kN/m), 90° without cut 44 52 61 70 85 88 103 113 155 196
DIE B/b (kN/m), 90° with cut 39 45 40 43 45 48 50 67 127 170
DIE C (kN/m), curved with cut 59 64 68 54 70 78 85 105 171 214
ISO 4662  
Rebound resilience (%) 63 61 59 58 54 52 47 46 \ \
ISO 815  
Compression set 70°C/23h (%) 40 40 38 44 42 40 45 45 \ \
ISO 4649  
Abrasion resistance (mg) 30 35 35 40 40 40 45 50 52 52
Casting Information
Hardness (ShA) MDE249 R5012 RT140 Catalyst (%) Molds T (°C) Gel time (sec) Demolding (min)
60 100.00 210.00 7.90 0.3-0.5 90-100 120-210 20-40
65 100.00 190.00 8.80 0.3-0.5 90-100 120-210 20-40
70 100.00 160.00 10.15 0.3-0.4 90-100 120-210 20-40
75 100.00 130.00 11.50 0.3-0.4 90-100 120-210 20-40
80 100.00 110.00 12.40 0.2-0.3 90-100 120-210 20-40
85 100.00 90.00 13.30 0.2-0.3 90-100 120-210 20-40
90 100.00 70.00 14.20 0.2-0.3 90-100 120-210 20-40
95 100.00 50.00 15.10 0.2-0.3 90-100 120-210 20-40
60 ShD 100.00 10.00 16.90 0.1-0.2 90-100 100-120 20-40
65 ShD 100.00 0.00 17.35 0.1-0.2 90-100 100-120 20-40

The amount of main components is given on parts by weight.
*Pot life and demolding time are referred to the system with recommended amount of TECNOKAT D5 catalyst.

Post Curing Information
  • A warm post curing is not required.
  • The system reaches the maximum mechanical properties in seven days at room temperature.
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Packaging & Availability

Regional Availability
  • Global
Packaging Information
Materials are available in following packaging: 50 or 200 kg

Storage & Handling

Handling Information
  • In order to allow complete melting, pre-heat materials at following conditions (melting times are referred to 200 kg drums,stored at 20°C)
Pre-heating temperature (°C) 50
Pre-heating time (hours) 16
  • After pre-heating, make sure all materials are completely melted.
  • Materials must be stored under nitrogen blanket after use.