Neuthane 3100 MDI – PTMEG Ether Rotational Casting Systems (70Shore A – 70 Shore D)

Properties

The Neuthane 3100 series are high performance MDI - PTMEG ether rotational casting systems designed to produce roller coverings in arduous application areas.

They offer:

  • a high level of physical properties
  • very good dynamic performance
  • good hydrolysis resistance
  • high resilience
  • non MOCA curatives
  • processing without moulds
  • room temperature curing

Typical Applications

  • Steel mill rollers
  • paper mill rollers

Processing can be by hand or by dispensing machine

Hand Processing

  • 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 (the storage tank on the machine should be fitted with agitation to prevent separation during 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 theoutput 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

  • Solvents/Abrasion/Cut resistance - Ester based systems should be considered: Neuthane 3200 [MDI rotational casting]
  • Cost – Ester systems will offer cost savings: Neuthane 3200 [MDI rotational casting] PPG ether systems will also offer advantages [Neuthane 3300*]

* Non-standard products - details are available upon request

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Neuthane 3100 MDI – PTMEG Ether Rotational Casting Systems (70Shore A – 70 Shore D)

Neuthane 3100 3100 3100
Curative 3170 3175 3180
Mix Ratio: Curative per 100 Parts resin by weight 46.0 41.0 36.0
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

(Viscosity vs. Temp Graphs available on request)

cps 630 630 630
Pot life (on a 500g mix) seconds 15 15 15
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)

320

(2.2)

420

(2.9)

680

(4.7)

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

(Mpa)

790

(5.5)

820

(5.7)

1450

(10.0)

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

(Mpa)

3100

(21.4)

3000

(20.7)

4150

(28.6)

Elongation at Break BS 903 Pt A2 - ISO 37 % 510 500 470
Tear Strength BS 903 Pt A3 - ISO 34-1 lb/in

(KN/m)

220

(38.5)

250

(43.8)

380

(66.5)

Specific Gravity g/cm³ 1.06 1.07 1.07

Neuthane 3100 MDI – PTMEG Ether Rotational Casting Systems (70Shore A – 70 Shore D)

Neuthane 3100 3100 3100 3100D
Curative 3185 3190 3195 3170D
Mix Ratio: Curative per 100 Parts resin by weight 31.3 26.0 21.5 22
Resin Temperature °C 75 75 75 75
Curative Temperature °C 40 40 40 40
Recommended Roller Temperature °C Room Temperature Room Temperature Room Temperature Room Temperature
Viscosity @ 100°C

(Viscosity vs. Temp Graphs available on request)

cps 630 630 630 450
Pot life (on a 500g mix) seconds 15 15 15 15
Recommended Cure Temperature / Time °C / hrs Minimum 20 / 48 Minimum 20 / 48 Minimum 20 / 48 Minimum 20 / 48
Hardness DIN 2240-91 Shore A 85 90 95 -
DIN 2240-91 Shore D - - - 70
100% Modulus BS 903 Pt A2 - ISO 37 lb/in²

(Mpa)

890

(6.1)

1490

(10.3)

2480

(17.1)

3970

(27.4)

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

(Mpa)

1830

(12.6)

3200

(22.1)

6700

(46.2)

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

(Mpa)

5500

(38.0)

5800

(40.0)

7000

(48.2)

5250

(36.2)

Elongation at Break BS 903 Pt A2 - ISO 37 % 480 450 320 280
Tear Strength BS 903 Pt A3 - ISO 34-1 lb/in

(KN/m)

390

(68.3)

420

(73.5)

430

(75.3)

815

(142.6)

Specific Gravity g/cm³ 1.08 1.09 1.09 1.14

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