ALITA MG-802 Isophthalic Heat-Resistant Mold Polyester Resin

ALITA MG-802 is an isophthalic-type unsaturated polyester resin specifically designed for high-performance FRP mold making. It features medium viscosity, excellent fiber wetting, and a very high Heat Distortion Temperature (HDT 120°C) with low shrinkage, ensuring superb dimensional stability and surface finish for precision molds.

• High HDT (120°C): Resists heat deformation during the high exotherm phase of part fabrication, extending mold life.
• Low Shrinkage & High Precision: Prevents fiber print-through and maintains precise mold dimensions.
• Excellent Strength & Impact Resistance: Robust mechanical properties support repeated demolding stress.

• Curing System: Recommended: 55% MEKPO 2% + E1 Accelerator 1-4%. Avoid amine-based accelerators to prevent degradation of thermal stability.
• Mandatory Post-Curing: To achieve its high heat-resistant properties, the mold must be fully cured. Recommended post-curing schedule: Room temp demold followed by 60°C × 2-3h + 120°C × 2-3h.
• Lamination Control: Control the lamination thickness per step to prevent excessive heat build-up and guarantee shrinkage control.

Note: Tested per GB/T 8237. Gel time test conditions: 25°C water bath, 50% cyclohexanone peroxide paste 4%, E1 accelerator 4%.

Note: Physical properties measured after full post-curing schedule.

• Packaging: 200kg net weight metal drums.
• Storage: Store below 25°C in a cool, ventilated indoor area, away from direct sunlight. Shelf life is 3 months.