High Performance Cast Elastomers   
Neuthane 802-NG C53 Series (2 Component) MDI - Ester Quasi Systems (55A-95 Shore A)

Neuthane 802-NG Series (2 Component) MDI - Ester Quasi Systems (55A - 95 Shore A)

Properties

The Neuthane 802 series are high performance MDI - ester quasi systems designed to produce items for use in arduous application areas.

They offer:

  • a high level of physical properties
  • good cut and abrasion resistance
  • good chemical resistance
  • higher levels of physical properties at low end of
    the hardness range compared to TDI systems
  • low process temperatures

Typical Applications

  • Wheels (e.g. pallet truck)
  • Mining and quarrying (e.g. screen decks, scraper blades)
  • Oil and gas industry (e.g. gaskets, pipe pigs)
  • Automotive (e.g. suspension bushes)
  • Concrete Industry (e.g. moulds for decorative slabs and walls)

Processing can be by hand or by dispensing machine

Hand Processing

  • Melt ISO component at 45-55°C, POLYOL components at 55-60°C for 12-24 hours
  • Ensure components are completely liquid and thoroughly mixed prior to use
  • Bring all components to the recommended process temperature.
  • Add pigments and Antifoam (as applicable) to the polyol component whilst mixing
  • It is recommended that air be removed from the ISO component under vacuum prior to addition of the curative
  • Add all components and thoroughly mix ensuring that no unmixed materialis 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 moisture contamination of all materials.
  • Part used containers should be flushed with dry nitrogen and resealed immediately after use
  • It is vital to ensure that both components are completely liquid and thoroughly mixed prior to use
  • Due to the exothermic nature of the system, larger mixes will have a shorter pot life

Alternatives

  • Humid/Wet - PTMEG ether based systems should be considered: Neuthane 100 [TDI], Neuthane 600 [MDI] or Neuthane 500 [Aliphatic]
  • Dynamic/Resilience - PTMEG ether based materials should be considered: Neuthane 100 [TDI], Neuthane 600 [MDI] or Neuthane 801 [MDI Quasi]
  • Temperature – Neuthane 100 [TDI PTMEG] or Neuthane 500 [Aliphatic Isocyanate] systems may be considered

 

High Performance Cast Elastomers   
Neuthane 802-NG C53 Series (2 Component) MDI - Ester Quasi Systems (55A-95 Shore A)
Neuthane Curative 802/55 NG C53 802/60 NG C53 802/65 NG C53 802/70 NG C53 802/75 NG C53
Mix Ratio N802 ISO-NG by weight 100 100 100 100 100
Mix Ratio Curative per 100 parts 802 ISO_NG by weight 278.1 199.3 172.4 154.0 132.4
Neuthane 802 ISO-NG Temperature °C 45 45 45 45 45
Neuthane 802 POLY-NG 53 Temperature °C 55 55 55 55 55
Optimum Mould Temperature °C 90 - 100 90 - 100 90 - 100 90 - 100 90 - 100
Pot life minutes 3-6 3-6 3-6 3-6 3-6
Recommended Cure Temperature / Time °C / hrs 70 / 16 70 / 16 70 / 16 70 / 16 70 / 16
               
Hardness DIN 2240-91 Shore A 55 60 65 70 75
DIN 2240-91 Shore D - - - - -
100% Modulus BS 903 Pt A2 - ISO 37 lb/in² (Mpa) 188 (1.3) 275 (1.9) 377 (2.6) 449 (3.1) 507 (3.5)
300% Modulus BS 903 Pt A2 - ISO 37 lb/in² (Mpa) 275 (1.9) 464 (3.2) 667 (4.6) 841 (5.8) 855 (5.9)
Tensile Strength BS 903 Pt A2 - ISO 37 lb/in² (Mpa) 2755 (19) 3480 (24) 3770 (26) 3916 (27) 5221 (36)
Elongation at Break BS 903 Pt A2 - ISO 37 % 855 680 620 610 600
Tear (Die C) ISO 34-1 KN/m 28.7 42 53 59 71
Tear (Trouser) ISO 34-1 N/mm 10 11 18 18 19
Abrasion loss DIN 53516 mm³ <40 <40 <40 <40 <40
Resilience ASTM D 2632-92 % 52 50 50 49 45
Specific Gravity g/cm³ 1.16 1.17 1.17 1.18 1.18
Neuthane Curative 802/80 NG C53 802/85 NG C53 802/90 NG53 802/95 NG C53
Mix Ratio N802 ISO-NG by weight 100 100 100 100
Mix Ratio Curative per 100 parts 802 ISO-NG by weight 97 88 72.4 57.9
Neuthane 802 ISO-NG Temperature °C 45 45 45 45
Neuthane 802 POLY-NG Temperature °C 55 55 55 55
Optimum Mould Temperature °C 85 - 95 85 - 95 85 - 95 85 - 95
Pot life minutes 3 - 5 3 - 5 3 - 5 3 - 5
Recommended Cure Temperature / Time °C / hrs 70 / 16 70 / 16 70 / 16 70 / 16
             
Hardness DIN 2240-91 Shore A 80 85 90 95
DIN 2240-91 Shore D - - - -
100% Modulus BS 903 Pt A2 - ISO 37 lb/in² (Mpa) 710 (4.9) 884 (6.1) 1102 (7.6) 1392 (9.6)
300% Modulus BS 903 Pt A2 - ISO 37 lb/in² (Mpa) 1421 (9.8) 1609 (11.1) 2059 (14.2) 2509 (17.3)
Tensile Strength BS 903 Pt A2 - ISO 37 lb/in² (Mpa) 6671 (46) 7687 (53) 7687 (53) 8122 (56)
Elongation at Break BS 903 Pt A2 - ISO 37 % 600 600 590 570
Tear (Die C) ISO 34-1 KN/m 83 92 100 116
Tear (Trouser) ISO 34-1 N/mm 24 26 32 43
Abrasion loss DIN 53516 mm³ <40 <40 <40 <40
Resilience ASTM D 2632-92 % 40 36 36 35
Specific Gravity g/cm³ 1.18 1.18 1.18 1.18