UnSaturated Polyester

JSB-OUP 203-ST65 is a non-accelerated unsaturated polyester resin based on isophthalic acid / NPG. It has very low color, medium viscosity, low shrinkage, low water absorption, and very good mechanical properties. This resin is designed for curing at room temperature using methyl ethyl ketone peroxide (MEKP).

Appearance: Transparent

Color: 1 Gardner max. — ASTM D1544

Viscosity at 25°C: 800–1200 mPa·s / cP — ISO 2555

Density at 23°C: 1.12 ± 0.01 g/cm³ — ASTM D1475

Acid Value: 20 mg KOH/g max. — ASTM D1639

Solid Content: 66 ± 2% — ASTM D1259

Gel Time: 420–720 seconds — ASTM D2471

This product offers very low color, medium viscosity, low shrinkage and water absorption, good adhesion to glass fibers, hydrolysis resistance, and very good mechanical and chemical properties.