ORTHOPHTHALIC SMC
Product Features & Applications
The SMC Grade is a non- promoted, highly reactive, medium viscosity, high heat distribution, and unsaturated polyester resin. This resin is specially designed for fast line speed sheet moulding impregnation process. It has excellent catalyzed stability and excellent glass wet- out characteristics, resulting in good mechanical, electrical properties.
Typical Applications:
For manufacturing of electrical components and special parts for mechanical and electrical appliances.
PHYSICAL DATA IN LIQUID STATE AT 250C# [Confirm to IS 6746-1994 and BS 3532-1990]
| Properties |
Unit |
Value |
TM |
| Appearance |
- |
Clear viscous |
TM-31 |
| Specific Gravity. |
- |
1.14 + 0.02 |
TM-11 |
| Viscosity -Ford Cup 4 @ 30oC
-Brookfield RVT model# |
Seconds mPa s(cP) |
320 + 30
1200 + 100 |
TM-04 TM-05 |
| Acid Value |
mg. KOH/gm |
25+ 3 |
TM-06 |
| Volatile Content |
% |
32 + 3 |
TM-08 |
| Geltime @ 250C * |
minutes |
15 + 3 |
TM-07 |
| Stability in the Dark |
Months |
3 |
TM-32 |
| SPI Test at 140°c,1.3%TBPB |
Seconds |
90-110 |
TM-07 |
- * Using Accelerator, Co (2%) 1 ml, Catalyst, MEKP1.5ml, the gel time, cure time and Peak Exotherm measured.
- * TM- Test Method
Usage & Post Curing
- The Orthophthalic polyester resin performs best if the laminate is completely post cured. The quantity of catalyst and accelerator can be adjusted to get a shorter or longer geltime.
- It is recommended to mature the products for 24 hours and post curing should be done for minimum of six hours at 80 deg centigrade. This is recommended for getting the optimum properties.
Properties of Cast Resin Laminate (on base resin)
| Properties |
Units |
Results |
TS |
| a) Barcol Hardness |
BHU |
42* |
ASTM D -2583 |
| b) Heat Distortion Temp. |
0C |
100 |
ISO-75 |
| c) Specific Gravity |
- |
1.22 ± 0.02 |
ISO-1183 |
| d) Volume Shrinkage on cure |
% |
6-7 |
ISO-3521 |
| e) Tensile Strength |
N/sq.mm |
50 + 5 |
ISO - 527 |
| f) Tensile Modulus |
N/sq.mm |
3150 |
ISO- 527 |
| g) Elongation at break |
% |
1-2 |
ISO - 527 |
| h) Flexural Strength |
N/sq.mm |
100 ± 10 |
ISO – 178 |
| i) Flexural Modulus |
N/sq.mm |
3200 |
ISO – 178 |
- * Post cured results.
- TS- Test Standards
| Application Methods |
O Optional |
Yes |
| Hand lay-up |
|
|
| Spray-up |
|
|
| Filament Winding |
|
|
| Continuous Laminating |
|
|
| Casting |
|
Yes |
| Resin Transfer Moulding |
|
|
| Cold Press |
|
|
| Hot Press ( Sheet - Bulk Moulding Compound ) |
|
Yes |
| Pultrusion ( Profile ) |
|
|
| Other |
|
|
| Chemical Structure |
|
O Optional |
Yes |
| Acid |
Phthalic |
Acceleration |
- |
| Glycol |
Standard glycols |
Reactivity |
Medium |
| Modification |
- |
Grade/Versions |
SMC Resin |
- Packing: Regularly available 35 Kgs (Carboys) 220 Kgs (Drums/Barrel)
| Revision |
Description |
Date |
| ISO- 9001- 2008 Rev-00 |
Orthophthalic SMC |
16.08.2010 |
