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© 2005. Royce International USA ROYCE INTERNATIONAL AND ATUL LTD. Present Di- and Tri-Functional Epoxides As Reactive Diluents In Epoxy Systems Authors.

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Presentation on theme: "© 2005. Royce International USA ROYCE INTERNATIONAL AND ATUL LTD. Present Di- and Tri-Functional Epoxides As Reactive Diluents In Epoxy Systems Authors."— Presentation transcript:

1 © 2005. Royce International USA ROYCE INTERNATIONAL AND ATUL LTD. Present Di- and Tri-Functional Epoxides As Reactive Diluents In Epoxy Systems Authors Dr. Hubert Monteiro Mr. Harshad Deshpande COMMITTED TO YOUR SUCCESS……SINCE 1929

2 1. Diluents Selected Aliphatic difunctional diluents Neopentyl glycol diglycidyl ether (NPGDGE) 1:4-butane-diol diglycidyl ether (BDGE) 1:6-hexane-diol diglycidyl ether (HDGE) Aliphatic trifunctional diluent Trimethylol propane triglycidyl ether (TMPTGE) Aromatic difunctional diluent Resorcinol diglycidyl ether (RDGE)

3 2. Viscosity & Epoxy Equivalent Weight of Diluents used DiluentEEWViscosity at 25 o C NPGDGE13714 BDGE11013 HDGE12416 TMPTGE128230 RDGE113165

4 3. Efficiency of Diluents (phr of diluent added to B-11 to obtain a viscosity of 2000 cP) NPGDGE19.8 BDGE18.5 HDGE14.3 TMPTGE42.9 RDGE50

5 4. Viscosity of Mix with XH 56 and XH 56-1 DiluentXH 56XH 56-1 Mix Ratio phr ViscosityMix Ratio phr Viscosity B-11 / NPGDGE30.1203827.21812 B-11 / BDGE32.6122329.4996 B-11 / HDGE31.3185728.31449 B-11 / TMPTGE34.1249130.81857 B-11 / RDGE36.52165331882 B-11295689274587 Viscosity in cP at 25 o C

6 5. Gel Time and Pot-life in minutes Gel Time at 80 o CPot Life at 25 o C DiluentXH 56XH 56-1XH 56XH 56-1 NPGDGE481117839 BDGE43912733 HDGE43811327 TMPTGE29811029 RDGE2267622 B-1131915637

7 6. Tg before and after post-curing Tg before post curingTg after post curing XH 56XH 56-1XH 56XH 56-1 NPGDGE97108120.5122 BDGE100.5107.5118134 HDGE113.2118.6121.2124.8 TMPTGE105.5111.8132135.9 RDGE106.7121.2132.3138 B-11121.3131.3134.1141.4 Tg after Gel time +24 hrs at RT, (°C) Tg after Gel time +24 hrs at RT+100°C/3h +140°C/2h (°C)

8 7. Water Absorption DiluentXH 56XH 56-1XH 56XH 56-1 NPGDGE0.10.090.460.42 BDGE0.130.060.50.37 HDGE0.10.070.320.33 TMPTGE0.130.080.520.37 RDGE0.080.040.30.2 B-110.10.060.050.03 Water absorption after 24 hrs at RT % w/w Water absorption after 100°c /2h % w/w

9 8. Shear strength after post-curing (kgf/mm2) DiluentXH 56XH 56-1 NPGDGE0.48440.4328 BDGE0.74140.688 HDGE0.5650.5612 TMPTGE0.58950.5736 RDGE0.5550.5575 B 110.61170.6015

10 9. Tensile strength after post-curing (kgf/mm2) DiluentXH 56XH 56-1 NPGDGE5.485.44 BDGE7.556.62 HDGE7.606.43 TMPTGE6.995.87 RDGE8.597.74 B-117.567.3

11 10. Tensile elongation at break after post-curing (%) DiluentXH 56XH 56-1 NPGDGE4.113.98 BDGE4.584.31 HDGE4.254.01 TMPTGE4.654.57 RDGE4.984.85 B-114.84.78

12 11. Compressive strength after post-curing (kgf/mm2) DiluentXH 56XH 56-1 NPGDGE11.2510.98 BDGE12.2411.87 HDGE11.9511.52 TMPTGE12.7812.25 RDGE13.0212.65 B-1114.2213.52

13 12. Impact strength after post-curing (kgf cm/cm 2 ) DiluentXH 56XH 56-1 NPGDGE8.86.5 BDGE10.89.6 HDGE9.78.9 TMPTGE9.07.0 RDGE11.411.0 B-1110.77.8

14 13. Electrical Properties of B-11 / BDGE / XH 56-1 Dielectric constant at 50 Hz3.05 Dissipation Factor (tan delta) at 50 Hz0.005 Dielectric strength18 kV/mm

15 14. Conclusions Resorcinol Diglycidyl Ether gives the highest Tg but very poor dilution efficiency. Because of health hazard 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 (134 o C) and best overall mechanical properties. Hence it is ideal for filament winding, pultrusion, casting and encapsulation.


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