Neuthane 335 Con - TDI Prepolymer Systems

Properties

The Neuthane 335 Con series of TDI based prepolymers cure in combination with Neuthane 30 Con, 40 Con, 50 Con and 60 Con curatives to give highly durable elastomers suitable for mould making.

They offer:

  • a high level of elasticity
  • good tear resistance
  • good abrasion resistance
  • low process temperatures
  • good dimensional stability

Typical Applications

  • Concrete Industry (e.g. moulds for decorative slabs and walls)
  • Model making

Processing can be by hand or by dispensing machine

Hand Processing

  • It is important the ambient curing conditions be at least 20°C.
  • Prior to casting please ensure the polyol component is mixed thoroughly as it is a blend.
  • Bring all components to the recommended process temperature.
  • Add pigments and Antifoam (as applicable) to the polyol component whilst mixing
  • Add all components 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).
  • If a vacuum facility is unavailable please limit the amount of air entrapped
    during mixing.
  • 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 the curative component is completely
    liquid and thoroughly mixed prior to use
  • Due to the exothermic nature of the system larger mixes will
    have a shorter pot life
  • Allow longer demould times if curing sub ambient

Properties

  • If cured at room temperature then physicals will develop fully over a 7 day.
  • Alternatively a post-cure at 60-70°C for 4-8 hours can be employed.
  • Depending upon system hardness and cure conditions the development of physicals may take longer. It is therefore advisable to assesstear strength before using the mouldings.

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Neuthane 335 Con - TDI Prepolymer Systems

Neuthane 30 CON 40 CON 50 CON 60 CON
335 Con by weight 100 100 100 200
Curative, Con Series by weight 200 150 100 100
Resin Temperature °C 20 - 25 20 - 25 20 - 25 20 - 25
Curative Temperature °C 20 - 25 20 - 25 20 - 25 20 - 25
Recommended Mould Temperature °C 20 - 25 20 - 25 20 - 25 20 - 25
Viscosity @ 25°C Resin

Curative

cps

cps

6400

600

6400

600

6400

600

6400

600

Pot life (on a 500g mix) minutes 15 - 20 15 - 20 15 - 20 15 - 20
Recommended Cure Temperature / Days °C / Days 25 / 7 25 / 7 25 / 7 25 / 7
Demould Cure Time Hours 24 24 24 24
Hardness DIN 2240-91 Shore A 30-35 40-45 50-55 60-65
100% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

90

(0.6)

116

(0.8)

190

(1.3)

205

(1.4)

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

(Mpa)

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

(Mpa)

600

(4.0)

740

(5.1)

800

(5.5)

1160

(8.0)

Elongation at Break BS 903 Pt A2 - ISO 37 % 1000 1000 1000 1000
Tear Strength BS 903 Pt A3 - ISO 34-1 lb/in

(KN/m)

90

(15.8)

100

(17.5)

150

(26.3)

200

(35.1)

Trouser Tear BS 903 Pt A3 - ISO 34-1 KN/m 5.0 6.8 8.5 10.0
Compression Set BS903 Pt A6 - ISO 815 KN/m - - - -
Abrasion loss DIN 53516 mm³ - - - -
Resilience ASTM D 2632-92 % - - - -
Specific Gravity g/cm³ 1.10 1.10 1.10 1.10

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 inferredv3