Neuthane 500 Series Aliphatic - PTMEG Ether Prepolymer (94 Shore A - 70 Shore D)

Properties

The Neuthane 500 series are high performance Aliphatic Isocyanate prepolymers designed to produce items for use in extreme application areas.

They offer:

  • a very high level of physical properties
  • exceptional dynamic performance
  • the highest level of hydrolysis resistance
  • ease of use
  • low viscosity
  • water clarity and UV stability*
  • wide hardness range depending upon curative used

Typical Applications

  • High load roll coverings (e.g. steel industry)
  • Roller coverings for use in hot/wet environments (e.g. pre treatment
    and squeegee rolls in the steel industry)
  • High temperature applicationsPaper mill rollers

Processing can be by hand or by dispensing machine

Hand Processing

  • Melt prepolymer at 50-70°C for 12-24 hours (as a guide the grades with the lower NCO value will take longer to melt than those with very high level NCO values)
  • Heat the prepolymer and curative to the recommended temperature
  • Add pigments and Antifoam, as applicable, whilst mixing
  • It is recommended that air be removed from the prepolymer under vacuum prior to addition of the curative
  • Add the curative and thoroughly mix ensuring that no unmixed material is left on the container sides (if necessary the mix can be transferred to a second clean container and mixed again)
  • Remove air under vacuum
  • Cast into moulds, preheated to the recommended temperature
  • Cure as recommended

Processing Considerations

  • Avoid prolonged storage of prepolymers at elevated temperatures.
  • This will result in low hardness and lower properties of the cured material
  • Avoid moisture contamination of all materials
  • Ensure thorough mixing of curatives prior to use
  • Remove air, under vacuum, from the prepolymer components prior to use
  • Part used containers should be flushed with dry nitrogen and resealed immediately after use

Alternatives

  • Solvents – ester based systems should be considered Neuthane 200 [TDI] or Neuthane 700 [MDI]
  • Cost – Aromatic Isocyanate / PTMEG based systems should be considered: Neuthane 100 [TDI] or Neuthane 600 [MDI]

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Neuthane 500 Series Aliphatic - PTMEG Ether Prepolymer (94 Shore A - 70 Shore D)

Neuthane 555 560 575 595
%NCO (mid-point) % 5.5 6.0 7.5 9.5
Curative CA1 CA1 CA1 CA1
Curative # 2 MOCA – Can be used to achieve the same hardness with a pot life > 60 minutes.

Typical properties will be reduced by 25%

Mix Ratio Curative CA1 per 100 Parts Resin by weight 10.8 11.8 14.7 18.7
Resin Temperature °C 70 70 70 70
Curative Temperature °C 30 30 30 30
Recommended Mould Temperature °C 90 90 90 90
Viscosity @ 100°C (prepolymer) cps 1200 1100 420 380
Pot life (on a 500g mix) minutes 6 5 5 4
Recommended Cure Temperature / Time °C / hrs 90 / 16 90 / 16 90 / 16 90 / 16
Hardness DIN 2240-91 Shore A 94 - - -
DIN 2240-91 Shore D - 45 55-60 70
100% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

1450

(10.0)

1850

(12.8)

2350

(16.2)

4630

(31.9)

300% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

3450

(23.8)

4750

(32.8)

5300

(36.6)

-
Tensile Strength BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

6150

(42.4)

7200

(49.7)

6000

(41.4)

5650

(39.0)

Elongation at Break BS 903 Pt A2 - ISO 37 % 395 380 320 205
Tear Strength BS 903 Pt A3 - ISO 34-1 lb/in

(KN/m)

460

(80.5)

540

(94.6)

650

(113.8)

785

(137.5)

Compression Set BS903 Pt A6 - ISO 815 % 78 - - -
Abrasion loss DIN 53516 mm³ 38 47 50 57
Resilience ASTM D 2632-92 % 41 41 41 49
Specific Gravity g/cm³ 1.04 1.04 1.05 1.05

Neuthane 575 + CA575 Curatives - Aliphatic – PTMEG Ether Systems (70 - 95 Shore A)

Neuthane 575 575 575 575 575 575
%NCO (mid-point) % 7.5 7.5 7.5 7.5 7.5 7.5
Curative CA575-70 CA575-75 CA575-80 CA575-85 CA575-90 CA575-95
Mix Ratio Curative CA1 per 100 Parts Resin by weight 57.0 53.0 48.4 43.9 39.0 34.9
Resin Temperature °C 70 70 70 70 70 70
Curative Temperature °C 30 30 30 30 30 30
Recommended Mould Temperature °C 100 100 100 100 100 100
Viscosity @ 100°C (prepolymer) cps 420 420 420 420 420 420
Pot life (on a 500g mix) minutes 15 10 10 10 10 10
Recommended Cure Temperature / Time °C / hrs 100 / 16 100 / 16 100 / 16 100 / 16 100 / 16 100 / 16
Hardness DIN 2240-91 Shore A 70 75 80 85 90 95
DIN 2240-91 Shore D - - - - - 43
100% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

225

(1.55)

390

(2.7)

750

(5.2)

790

(5.5)

840

(5.8)

890

(6.1)

300% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

915

(6.3)

1080

(7.4)

1770

(12.2)

2130

(14.7)

2260

(17.0)

3000

(20.7)

Tensile Strength BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

5130

(35.4)

5750

(39.6)

6290

(43.2)

6600

(45.5)

6440

(44.4)

6400

(44.1)

Elongation at Break BS 903 Pt A2 - ISO 37 % 630 550 480 500 470 450
Tear Strength BS 903 Pt A3 - ISO 34-1 lb/in

(KN/m)

230

(40.6)

315

(55.1)

370

(64.9)

390

(68.5)

420

(73.6)

450

(79.4)

Compression Set BS903 Pt A6 - ISO 815 % 43 40 38 39 38 37
Abrasion loss DIN 53516 mm³ 27 25 26 31 29 27
Resilience ASTM D 2632-92 % 55 50 43 38 39 40
Specific Gravity g/cm³ 1.02 1.02 1.03 1.03 1.03 1.03

Information contained in the data is, to the best of our knowledge, true and accurate. Since conditions of use are beyond our control, no warranty is given or implied in respect of any recommendations or suggestions made by ourselves, nor is freedom from patent infringement inferred