Description
ISOPHTHALIC FOOD GRADE RESIN
PRODUCT FEATURES & APPLICATIONS:
Isophthalic Food Grade Resin is a medium viscosity, medium reactive polyester resin based on Iso- phthalic acid. It exhibits good mechanical and electrical properties together with good chemical resistance compared to general-purpose resins. ISO Food grade resin is rapidly wets the surface of glass fiber in the form of cloth mat or chopped fiber to produce laminates and moldings. Its superior chemicals resistance towards most mineral and organic acids, solvents and oils makes ISO Food grade resin an ideal choice. F
or food grade applications, the laminate fabricated should be post cured as per procedure (Refer Annexure-1)
TYPICAL APPLICATION
- Food Storage Tanks, Tanker Equipment, Piping.
PHYSICAL DATA IN LIQUID STATE AT 25OC#
[Confirm to IS 6746-1994 and BS 3532-1990]
PROPERTIES OF THE RESIN
| Properties |
Unit |
Value |
TM |
| Appearance |
– |
Pale Yellow |
TM-31 |
| Specific Gravity |
– |
1.11 ± 0.02 |
TM-11 |
| Viscosity |
Seconds / mPa s (cP) |
130 ± 20 / 500 – 600 |
TM-04 / TM-05 |
| Acid Value |
mgKOH/gm |
15 ± 5 |
TM-06 |
| Volatile Content |
% |
38 – 42 |
TM-08 |
| Gel Time @ 25°C * |
Minutes |
18 – 25 |
TM-07 |
| Peak Exotherm Temp. |
°C |
140 – 160 |
TM-07 |
| Stability in the Dark |
Months |
3 |
TM-32 |
PROPERTIES OF CAST RESIN LAMINATE (on base resin)
| Properties |
Units |
Results |
Test Standard |
| Barcol Hardness |
BHU |
40* |
ASTM D – 2583 |
| Heat Distortion Temp. |
°C |
80 |
ISO- 75 |
| Specific Gravity |
– |
1.20 ± 0.02 |
IS0-1183 |
| Volume Shrinkage on Cure |
% |
7 |
ISO-3521 |
| Tensile Strength |
N/sq.mm |
60 ± 10 |
ISO – 527 |
| Tensile Modulus |
N/sq.mm |
3000 – 3200 |
ISO – 527 |
| Elongation at Break |
% |
2.5 – 3 |
ISO – 527 |
| Flexural Strength |
N/sq.mm |
100 – 110 |
ISO – 178 |
| Flexural Modulus |
N/sq.mm |
3200 – 3400 |
ISO – 178 |
APPLICATION METHODS
| Method |
Optional |
Applicable |
| Hand Lay-up |
Yes |
Yes |
| Spray-up |
Yes |
No |
| Filament Winding |
Yes |
No |
| Continuous Laminating |
Yes |
No |
| Casting |
Yes |
No |
| Resin Transfer Moulding |
Yes |
Yes |
| Cold Press |
Yes |
No |
| Hot Press (Sheet – Bulk Moulding Compound) |
Yes |
No |
| Pultrusion (Profile) |
Yes |
No |
| Other |
Yes |
No |
CHEMICAL STRUCTURE
| Chemical |
Type |
Optional |
Property |
| Acid |
Isophthalic |
No |
Acceleration |
| Glycol |
Prop. glycol |
No |
Reactivity |
| Modification |
– |
Yes |
Grade/Versions |
Packing: Regularly available 30 & 35 Kgs (Carboys), 225 Kgs (Drums/Barrel)
TM- Test Method
USAGE & POST CURING
- The Isophthalic 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 longergeltime.
- 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.
