Neuthane 3200/765 - MDI - Ester Rotational Casting Systems (70 - 95 Shore A)

Properties

The Neuthane 3200/765 series are high performance MDI – ester rotational casting systems designed to produce roller coverings for use in arduous application areas.

They offer:

  • a high level of physical properties
  • good dynamic performance
  • very good cut and abrasion resistance
  • very good chemical resistance
  • non MOCA curatives
  • no moulds for processing
  • room temperature curing

Typical Applications

  • Steel mill rollers (dry applications)
  • Paper mill rollers (dry applications)

Processing must be carried out by dispensing machine

  • Melt prepolymer at 50-70°C for 12-24 hours
  • Heat the prepolymer and curative to the recommended temperature
  • Ensure that the curative is thoroughly mixed prior to use
  • Degass to remove air
  • Dispense at 700-2000g per minute*
  • Adjust rotation and traverse speed until a smooth build up is achieved*•
  • Cure as recommended

* This will vary depending upon diameter of roller. As a general guide the output rate,rotational and traverse speeds will all increase as the diameter of the roller increases

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
  • Part used containers should be flushed with dry nitrogen and resealed immediately after use
  • To prevent de-lamination, subsequent layers should be applied within 30 minutes

Alternatives

  • Wet / Dynamic Applications - Neuthane 3100 [PTMEG ether] will offer improved performance

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Neuthane 3200/765 - MDI - Ester Rotational Casting Systems (70 - 80 Shore A)

Neuthane 3200/765 3200/765 3200/765
Curative 3270/765 3275/765 3280/765
Mix Ratio: Curative per 100 Parts Resin by weight 52.6 45.5 40.5
Resin Temperature °C 75 75 75
Curative Temperature °C 40 40 40
Recommended Roller Temperature °C Room Temperature Room Temperature Room Temperature
Viscosity @ 100°C resin

(Viscosity vs. Temp Graphs available on request)

cps 800 800 800
Pot life (on a 500g mix) minutes 20-30 20-30 20
Recommended Cure Temperature / Time °C / hrs Minimum 20 / 48 Minimum 20 / 48 Minimum 20 / 48
Hardness DIN 2240-91 Shore A 70 75 80
DIN 2240-91 Shore D - - -
100% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

330

(2.3)

470

(3.2)

840

(5.8)

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

(Mpa)

600

(4.1)

800

(5.5)

1180

(8.1)

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

(Mpa)

6300

(43.5)

6380

(44.0)

6900

(47.6)

Elongation at Break BS 903 Pt A2 - ISO 37 % 600 600 550
Tear Strength BS 903 Pt A3 - ISO 34-1 lb/in

(KN/m)

300

(52.5)

350

(61.3)

410

(71.8)

Specific Gravity g/cm³ 1.21 1.22 1.23

Neuthane 3200/765 - MDI - Ester Rotational Casting Systems (85 - 95 Shore A)

Neuthane 3200/765 3200/765 3200/765
Curative 3285/765 3290/765 3295/765
Mix Ratio: Curative per 100 Parts Resin by weight 35.2 29.3 26.7
Resin Temperature °C 75 75 75
Curative Temperature °C 40 40 40
Recommended Roller Temperature °C Room Temperature Room Temperature Room Temperature
Viscosity @ 100°C resin

(Viscosity vs. Temp Graphs available on request)

cps 800 800 800
Pot life (on a 500g mix) minutes 20 15 15
Recommended Cure Temperature / Time °C / hrs Minimum 20 / 48 Minimum 20 / 48 Minimum 20 / 48
Hardness DIN 2240-91 Shore A 85 90 95
DIN 2240-91 Shore D - - -
100% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

990

(6.8)

1200

(8.3)

1230

(8.5)

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

(Mpa)

1480

(10.2)

1800

(12.4)

1850

(12.8)

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

(Mpa)

7500

(51.8)

7300

(50.4)

7500

(51.8)

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

(KN/m)

480

(84.0)

500

(87.5)

550

(96.3)

Specific Gravity g/cm³ 1.23 1.24 1.26

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