Product Name:Flame RetardantGelcoat HS - LFI7035S
1. Brief Introduction:HS-LFI7035S Gelcoat is an advanced intumescent flame retardant gel coat. The base resin used is Isophthalic-adipic acid unsaturated polyester resin, making it
ideal for spray applications. This pre-promoted gel coat is perfect for the surfaces of FRP products that demand exceptional flame retardancy.
.It is widely used in
rail transit systems, wind turbine nacelle covers, ship components, and other fields requiring high flame retardant standards.
2. Features: · Excellent construction performance;
· Superior flame retardant properties (high oxygen index, low smoke density);
· Compliant with fire protection standards UIC564-2 Class B
· Outstanding water and weather resistance.
3. Gelcoat Properties:
Gel time test: Curing agent M-50 (AKZO) 2%.
4 . Application Notes :1). Gently mix the gelcoat in a bucket before use to avoid high shear rates and air entrapment.
during mixing.
2). The optimal application temperature ranges between 18-25°C with humidity below 80%. Ensure the mold is
polished and clean before applying the gelcoat.
3). Ensure the mold surface is dry, clean, and oil-free before starting.
4). Wax the mold surface thoroughly (avoid silicone-containing release wax). Ensure water-soluble release wax is fully evaporated before spraying the gelcoat.
water-soluble release wax must wait for its moisture to evaporate before spraying the gelcoat.
5). Use MEKP as the curing agent for the gelcoat (dosage typically 1-3%).
6). Maintain the total gelcoat film thickness between 600-1000μm. Each spray layer should not exceed 0.2mm; wait 2-3 minutes post solvent volatilization before spraying the next layer to the
required thickness.
required thickness.
7). Test the gelcoat's cure degree before applying lamination layers. Press your finger for 30 seconds on the gelcoat film; if there is no residue on your finger but the film remains sticky, you may proceed with the lamination layers.
5. Operation procedure:
Note: Use a paint spray can, keeping the air source pressure at 20 psi and ensuring the airflow is at least 0.6 cubic meters per minute.
1). Follow the application guide requirements to prepare for spraying.
2). Apply a thin, easy-to-polish primer layer (no thicker than 0.2mm) on the original mold surface. Use thin layers and multiple passes, waiting for the solvent to dissolve.After 2 minutes of evaporation, spray the subsequent layers to the desired thickness. The primer will dry within an hour, allowing you to start sanding.
3). Dry sand with 220-320 mesh sandpaper, then follow with 600-1200 mesh water sandpaper, and finish by polishing.
6. Storage:
1) Ensure the product is not exposed to any heat sources such as direct sunlight or steam pipes. It should be stored in a cool, dry place maintaining temperatures below 25ºC to preserve its quality.
2) Always keep the container sealed to prevent moisture absorption and monomer evaporation. Extended storage beyond the recommended conditions can adversely affect the liquid resin’s properties, including viscosity and gel time.
3) Transportation must comply with the State Council's "Chemistry Dangerous Articles Safety Management Regulations." Due to the presence of styrene monomer, the product is classified as hazardous and flammable.
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