ALITA 501 – PTA-Type Unsaturated Polyester Resin for BMC Applications

Principal Properties & Application:

ALITA 501 resin is a PTA-type unsaturated polyester resin, primarily made from purified terephthalic acid (PTA), maleic anhydride, and standard glycols. It is dissolved in a styrene crosslinking monomer, exhibiting high viscosity and high reactivity. ALITA 501 resin offers stable thickening, good strength and toughness, low shrinkage, and excellent water resistance. It is suitable for the production of special products such as BMC (Bulk Molding Compound) manhole covers and traffic barrier bases.

Specifications of liquid resin:

Note: When testing SPI curing performance, the curing agent used is Enox BPO-50F at a dosage of 2%.

Physical Properties of SMC Moulded Plastic (for reference only):

Note:

1. The casting method follows GB/T 8237-2005. Curing system: Accelerator 0.6% Co Naphthenate 1.0%, Curing agent Butanox M-50: 1.0%.
2. Post-casting treatment: Room temperature × 24 hours + 60℃ × 3 hours + 120℃ × 1 hour.

Usage instructions:

1. Resin 501 does not contain wax, accelerators, or thixotropic agents.
2. To ensure the storage stability of SMC/BMC materials, stabilizers should be added during production.

Handling and Storage:

During transportation, it should comply with the national “Regulations on the Safe Management of Chemical Dangerous Goods,” Chapter 5 on the transportation and handling of chemical dangerous goods. It should be stored in a cool, ventilated indoor area below 25°C, away from sources of ignition, heat, and radiation. The container should be kept sealed, protected from moisture and sunlight, and stored separately from oxidizers, acids, and bases. Under these packaging, transportation, and storage conditions, the storage period is 6 months (for resin with accelerators, the storage period is 3 months). If the storage temperature is higher (up to 30°C), the storage period should not exceed 3 months (for resin with accelerators, the storage period should not exceed 1.5 months).