Unsaturated polyester resin
SIHE General-Purpose Unsaturated Polyester Resin Series for FRP
Suitable for
Developed for a range of FRP production methods and applications. SIHE selects and adjusts a suitable grade based on the finished part, production process, and the customer's hardness, toughness and gel-time requirements.
Grade selection
Grades and application options
| Resin grade | Viscosity (mPa·s) | Gel time (min) | Solids content (%) | Key characteristics |
|---|---|---|---|---|
| 189 | 400-800 | 8-25 | 60-66 | Orthophthalic unsaturated polyester resin with good wet-out and adhesion, low shrinkage, water and dilute-acid resistance, and good mechanical properties. Suitable for boats, cold-storage products and other FRP products. |
| 191A | 300-600 | 17-25 | 61-67 | Orthophthalic unsaturated polyester resin with medium viscosity, a light appearance and good clarity after cure. The cured product has good mechanical properties and is suitable for translucent roofing sheets, FRP sanitary ware and general FRP products. |
| 191C | 300-500 | 4-6 | 62-67 | Unsaturated polyester resin with good clarity, high reactivity and fast-curing characteristics. Suitable for hand lay-up, FRP furniture, fishing boats and wood-surface coating. |
| 191D | 300-500 | 15-20 | 62-67 | Clear blue resin with medium viscosity, good wet-out and good mechanical properties. Suitable for general FRP products and FRP pipes. |
| 191E | 300-600 | 3-6 | 62-68 | PET-based unsaturated polyester resin with medium viscosity, good wet-out and adhesion, good mechanical properties and fast cure. Suitable for FRP products and composite-reinforcement applications. |
| 192C | 450-550 | 7-8 | 62-69 | Unsaturated polyester resin with high reactivity and fast cure. Suitable for hand lay-up, FRP furniture, fishing boats and wood-surface coating. |
| 196A | 500-700 | 15-20 | 62-67 | Orthophthalic unsaturated polyester resin with good toughness, wet-out, clarity and mechanical properties. Suitable for cold-storage products and general FRP products. Food-related applications are subject to applicable compliance review and confirmation of the intended conditions of use. |
| 196C | 400-700 | 12-18 | 62-67 | Clear resin with medium viscosity, good wet-out and good mechanical properties. Suitable for general FRP products and FRP pipes. |
| 607 | 300-450 | 13-16 | 58-64 | Pre-accelerated and pre-thixotropic unsaturated polyester resin with good air-drying and glass-fibre wet-out. Suitable for hand lay-up and spray-up on inclined or vertical surfaces. Appearance: opaque pink liquid. |
| 6075 | 150-300 | 7-15 | 62-68 | Low-viscosity resin with fast cure, a short exotherm period and high hardness. Suitable for automated continuous FRP sheet-forming lines. |
| 901C | 200-400 | 7-15 | 62-68 | Low-viscosity resin with fast cure, a short exotherm period and high hardness. Suitable for automated continuous FRP sheet-forming lines. |
| DC191 | 300-500 | 7-8 | 63-70 | DCPD-based unsaturated polyester resin with a clear appearance, medium viscosity, good wet-out and good mechanical properties. Suitable for general FRP products and FRP pipes. |
Gel time is measured in a 25°C water bath using 100 g of resin, 1 g of SIHE cobalt accelerator and 1 mL of standard MEKP. These are test conditions, not a production-use recommendation. Viscosity and gel time may be adjusted within the specified ranges according to seasonal conditions. Please refer to the applicable instructions before use.
These are grade-specific reference values for preliminary selection. SIHE confirms the delivery grade against your application and process.
Application and process
SIHE Resin Application Cases
Images are provided for product and application reference. Final material selection should be confirmed based on the actual process and service conditions.
Buying information
Supply Information
- Manufacturing & supply
- SIHE · Manufactured by SIHE
- Packaging
- 220 kg / steel drum
- Availability & dispatch
- SIHE will confirm availability, dispatch location and timing for your selected product and destination.
- Order quantity
- Share your estimated quantity. The order quantity is confirmed for the selected product.
- Quotation currency
- Vietnam: VND. Other countries: USD. Final quotation currency is confirmed by SIHE.
Technical documents & samples
Download the general product overview or request the TDS and SDS for this product. SIHE confirms the exact grade, source revision, destination market and language; sample specification, availability, cost and freight are confirmed with you.
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