Global Composite
Induri, Pune, Maharashtra
GST No. 27AHYPP9502H2ZM
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Unsaturated Polyester Resin (UPR) is a high-performance thermosetting resin widely used in composite and fiberglass-reinforced plastic (FRP) industries. It is formed by the reaction of a dibasic organic acid and a polyhydric alcohol, with a cross-linking monomer, such as styrene, added to create a durable and flexible material. The unsaturation in the polymer chain allows the resin to undergo further curing, forming a hard and rigid cross-linked structure when combined with a catalyst, typically MEKP (Methyl Ethyl Ketone Peroxide).
UPR is favored for its excellent balance of mechanical, thermal, and chemical resistance properties, making it highly suitable for demanding applications. It is often employed in the following:
There are various types of unsaturated polyester resins, including orthophthalic, isophthalic, and dicyclopentadiene (DCPD)-based resins, each offering specific benefits. Orthophthalic UPR is known for general-purpose applications, while isophthalic and DCPD-based resins provide enhanced chemical resistance and higher performance for industrial applications.
UPR offers versatility in processing methods like hand lay-up, spray-up, RTM (Resin Transfer Molding), and filament winding, allowing for efficient production of large and complex components.
Product Details:
| Purity | Greater than 99% |
| Usage/Application | FRP |
| Form | Liquid |
| Color | Non Specified |
| Brand | GCPL |
| Packaging Size | 35kgs |
GCPL 1000 GP Moulding Resin is a general-purpose, PET-based unsaturated polyester resin designed for use in high-strength, corrosion-resistant applications such as FRP gratings and FRP manhole covers. The resin provides excellent mechanical and chemical properties, making it suitable for demanding environments such as chemical plants, wastewater treatment facilities, and industrial walkways.
Key Properties of the Liquid Resin:| Property | Value | Test Method |
|---|---|---|
| Appearance | Non Specified ( dark brown ) | Visual Inspection |
| Viscosity @ 25°C | 400 – 600 mPa·s (cP) | Brookfield RVF, Spindle #2 |
| Specific Gravity @ 25°C | 1.10 – 1.20 | ASTM D1475 |
| Acid Value | 20 – 35 mg KOH/g | ASTM D1639 |
| Gel Time @ 25°C (2% MEKP, 1% Cobalt Octoate) | 8 – 12 minutes | Internal Method |
| Peak Exotherm Temperature | 130 – 160°C | Internal Method |
| Time to Peak Exotherm | 20 – 25 minutes | Internal Method |
| Non-Volatile Content | 55 – 60% | ASTM D2369 |
| Flash Point | 34°C | ASTM D93 |
When curing at 25°C, the recommended initiator/accelerator system involves:
This system offers a fast gel time of 8 to 12 minutes at 25°C with a peak exothermic temperature reaching 160 to 180°C. The system achieves full cure within 20 to 25 minutes, enabling quick turnaround times for the molding process. Post-curing for 24 hours is recommended for optimal mechanical performance.
Processing Methods:GCPL 1000 GP Moulding Resin is suitable for a wide range of FRP manufacturing processes, including:
These methods ensure flexibility in manufacturing components such as FRP gratings, manhole covers, and other high-strength, corrosion-resistant products.
Storage and Handling: