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
Product & Application Gallery
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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