slideshare royce reactive diluent powerpoint v2

ROYCE INTERNATIONAL Presents

Di- and Tri-Functional EpoxidesAs Reactive Diluents In Epoxy Resin Systems cured with Royce’s high performance epoxy curing agents

AuthorsDr. Hubert Monteiro

Mr. Harshad Deshpande

COMMITTED TO YOUR SUCCESS……SINCE 1929

Royce International3400 S Tamiami TrlSarasota, FL [email protected]

941-894-1228

mailto:[email protected]

1. Diluents Selected

Aliphatic difunctional diluents

Neopentyl glycol diglycidyl ether (RoyOxy RAD 968)

1,4-butane-diol diglycidyl ether (RoyOxy RAD 77)

1,6-hexane-diol diglycidyl ether (RoyOxy RAD 968)

Aliphatic trifunctional diluent

Trimethylol propane triglycidyl ether (RoyOxy RAD 948)

Aromatic difunctional diluent

Resorcinol diglycidyl ether (RoyOxy RAD 981)

2. Viscosity & Epoxy Equivalent Weight of Diluents used

Diluent EEW Viscosity at 25oC

RoyOxy RAD 968 137 14





3. Efficiency of Diluents (phr of diluent added to RoyOxy RAR 928 epoxy resin to obtain a viscosity of 2000 cP)

NPGDGE 19.8

BDGE 18.5

HDGE 14.3

TMPTGE 42.9

RDGE 50

4. Viscosity of Mix with RoyOxy RAC 9923 and RoyOxy RAC 9924

Reactive Diluent RoyOxy RAC 9923 RoyOxy RAC 9924

Mix Ratio phr

Viscosity Mix Ratio phr

Viscosity

RAR 928 epoxy / NPGDGE

30.1 2038 27.2 1812

RAR 928 epoxy / BDGE

32.6 1223 29.4 996

RAR 928 epoxy/ HDGE

31.3 1857 28.3 1449

RAR 928 epoxy / TMPTGE

34.1 2491 30.8 1857

RoyOxy RAR 928 epoxy / RDGE

36.5 2165 33 1882

RoyOxy RAR 928 29 5689 27 4587

5. Gel Time and Pot-life in minutes

Gel Time at 80oC Pot Life at 25oC

Diluent RAC 9923 RAC 9924 RAC 9923 RAC 9924

NPGDGE 48 11 178 39

BDGE 43 9 127 33

HDGE 43 8 113 27

TMPTGE 29 8 110 29

RDGE 22 6 76 22

B-11 31 9 156 37

6. Tg before and after post-curingTg before post curing Tg after post curing

RAC 9923 RAC 9924 RAC 9923 RAC 9924

NPGDGE 97 108 120.5 122

BDGE 100.5 107.5 118 134

HDGE 113.2 118.6 121.2 124.8

TMPTGE 105.5 111.8 132 135.9

RDGE 106.7 121.2 132.3 138

B-11 121.3 131.3 134.1 141.4

Tg after Gel time +24 hrs at RT, (°C)

Tg after Gel time +24 hrs at RT+100°C/3h +140°C/2h

(°C)

7. Water Absorption

Diluent RAC 9923 RAC 9924 RAC 9923 RAC 9924

NPGDGE 0.1 0.09 0.46 0.42

BDGE 0.13 0.06 0.5 0.37

HDGE 0.1 0.07 0.32 0.33

TMPTGE 0.13 0.08 0.52 0.37

RDGE 0.08 0.04 0.3 0.2

RAR 928 0.1 0.06 0.05 0.03

Water absorption after 24 hrs at RT % w/w

Water absorption after 100°c /2h % w/w

8. Shear strength after post-curing (kgf/mm2)Diluent RAC 9923 RAC 9924

NPGDGE 0.4844 0.4328

BDGE 0.7414 0.688

HDGE 0.565 0.5612

TMPTGE 0.5895 0.5736

RDGE 0.555 0.5575

RAR 928 0.6117 0.6015

9. Tensile strength after post-curing (kgf/mm2)

Diluent RAC 9923 RAC 9924

NPGDGE 5.48 5.44

BDGE 7.55 6.62

HDGE 7.60 6.43

TMPTGE 6.99 5.87

RDGE 8.59 7.74

RAR 928 7.56 7.3

10. Tensile elongation at break after post-curing (%)


NPGDGE 4.11 3.98

BDGE 4.58 4.31

HDGE 4.25 4.01

TMPTGE 4.65 4.57

RDGE 4.98 4.85

RAR 928 4.8 4.78

11. Compressive strength after post-curing (kgf/mm2)


NPGDGE 11.25 10.98

BDGE 12.24 11.87

HDGE 11.95 11.52

TMPTGE 12.78 12.25

RDGE 13.02 12.65

RAR 928 14.22 13.52

12. Impact strength after post-curing (kgf cm/cm2)


NPGDGE 8.8 6.5

BDGE 10.8 9.6

HDGE 9.7 8.9

TMPTGE 9.0 7.0

RDGE 11.4 11.0

RAR 928 10.7 7.8

13. Electrical Properties of RAR 928 / RAD 77 / RAC 9924

Dielectric constant at 50 Hz 3.05

Dissipation Factor (tan delta) at 50 Hz 0.005

Dielectric strength 18 kV/mm

14. ConclusionsResorcinol Diglycidyl Ether gives the highest Tg but very poor dilution

efficiency. Because of health hazards, it is ruled out.

Trimethylol propane triglycidyl ether gives next best Tg. Good mechanical properties as well. If high dilution ratio (~40 phr diluent) is acceptable, it can be recommended.

1,4-butane-diol diglycidyl ether is the best difunctional aliphatic diluent with good efficiency, moderately high Tg (134oC) and best overall mechanical properties. Hence it is ideal for filament winding, pultrusion, casting and encapsulation.

slideshare royce reactive diluent powerpoint v2

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