TECNOTHANE® MDE 282 G

TECNOTHANE® MDE 282 G is an MDI-based polyurethane with a polyester backbone.

Polymer Name: Polyurethane (MDI-based)

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

Technical Data Sheet
  • TypeDocument Name
View All Documents

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

Features & Benefits

Materials Features
Abrasion Resistant,
Good Abrasion Resistance,
Highly Efficient

Applications & Uses

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

Tecnothane® MDE282G 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. “G” series is designed for improved abrasion resistance.

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 post curing.

ISO 7619-1
Hardness (ShA) 30±2 35±2 40±2 45±2 50±2 55±2 65±2 70±2 75±2 80±2 85±2 90±2 95±2
Hardness (ShD) / / / / / / / / 27±2 32±2 35±2 42±2 51±2
ISO 2781
Density (g/cm³) 1.22 1.22 1.22 1.22 1.22 1.22 1.22 1.22 1.22 1.22 1.22 1.22 1.22
ISO 37 (Tensile)
Modulus 50% (N/mm²) 0.5 0.5 1.0 1.0 1.5 1.5 2.0 2.0 2.5 3.5 4.5 5.0 6.0
Modulus 100% (N/mm²) 1.0 1.0 1.5 1.5 2.0 2.0 2.5 3.0 4.5 5.0 6.0 7.0 8.0
Modulus 300% (N/mm²) 1.5 2.0 2.0 2.5 3.0 4.0 4.5 5.5 7.0 8.5 9.5 11.0 12.0
Tensile strength (N/mm²) 4.0 5.0 8.0 12.0 16.0 25.0 30.0 35.0 38.0 39.0 40.0 45.0 47.0
Elongation (%) 800 800 800 770 750 660 660 660 660 650 650 650 650
ISO 34-1 (Tear strength)
DIE B/a (kN/m), 90° without nick 9 12 15 18 23 35 44 51 60 66 72 80 91
DIE B/b (kN/m), 90° with nick 5 7 9 12 16 20 23 25 27 29 35 43 55
DIE C (kN/m), crescent with nick 7 9 12 15 23 36 45 52 61 68 74 82 93
ISO 4662
Rebound resilience (%) / / / 70 65 58 58 55 55 53 52 50 49
ISO 815
Compression set at 70ºC / 23h (%) / / / 10 12 12 14 15 16 16 18 20 23
ISO 4649
Abrasion resistance (mg) / / / 55 40 25 24 24 23 23 25 27 27
Casting Information
Hardness (ShA) MDE282G R562 RT140 PLC9100 Catalyst (%) Molds T (°C) Pot life (sec) Demolding (min)
30 100.00 251.80 - 72.65 1.50 95-105 150-180 35-40
35 100.00 260.85 - 56.70 1.40 95-105 150-180 35-40
40 100.00 268.70 - 45.85 1.35 95-105 150-180 35-40
45 100.00 276.85 - 32.90 1.30 95-105 150-180 35-40
50 100.00 288.40 - - 1.25 95-105 150-180 35-40
55 100.00 167.50 5.20 - 1.20 95-105 150-180 35-40
60 100.00 148.15 6.80 - 1.10 95-105 150-180 35-40
65 100.00 117.05 9.10 - 1.00 95-105 150-180 35-40
70 100.00 110.20 9.75 - 0.90 95-105 150-180 35-40
75 100.00 100.70 10.60 - 0.80 95-105 150-180 35-40
80 100.00 85.35 11.80 - 0.70 95-105 150-180 35-40
85 100.00 68.85 13.05 - 0.60 105-115 150-180 35-40
90 100.00 57.05 13.95 - 0.50 105-115 105-125 35-40
95 100.00 44.95 14.80 - 0.45 105-115 90-105 35-40

The amount of main components is given on parts by weight.
Pot life and demolding time are referred to the system with the recommended amount of catalyst, Tecnokat T24 can be used to adjust pot life and demolding time.

Post Curing Information

Do not allow excessive cooling of molded parts between demolding and post-curing.

Hardness (ShA) Temperature (°C) Time (hours)
From 55 to 74 70 16
Higher than 75 90 16

For hardness ≤ 78 ShA it is recommended to wait 24 h at room temperature before the post-curing cycle.
For hardness above 93 ShA, two annealing steps are recommended to quickly reach the best performances; let the material cool down to room temperature in between the 2 post curing processes.

Packaging & Availability

Regional Availability
  • Global
Packaging Information
Materials are available in following packaging: 25, 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 - 60
Pre-heating time (hours) 16
  • After pre-heating, make sure all materials are completely melted.
  • Well mix melted material by drilling or rolling the drum
  • Load materials to the machine immediately after mixing.
  • Materials must be stored under nitrogen blanket after use.

Other

Physical Properties
ValueUnitsTest Method / Conditions
Viscosity1280.0-600.0 mPa.smPa.s