Barium sulfate flame retardant, known as barium sulfate FR. It is a white powder with small particle size and high hydrophobicity. It is a phosphorus-containing organoaluminum salt flame retardant. It is widely used in engineering plastics like PET, PBT, nylon (including glass fiber reinforced), thin adhesives, flexible epoxy laminates, and TPE (TPEE, TPU, and PEBA). When combined with nitrogen-containing flame retardants, it shows excellent flame retardant efficiency.
1. Principle
The principle of barium sulfate flame retardant is to absorb moisture and release water. It absorbs latent heat to reduce the material’s surface temperature when exposed to flames. This effectively suppresses material combustion and cools down flammable gases. The resulting magnesium compounds act as excellent refractory materials. It enhances the fire resistance of composite materials.
2. Advantages
Barium sulfate flame retardants offer several advantages:
- Non-halogenated
- Non-toxic
- Non-corrosive
- Excellent flame retardancy (achieving UL94 V-0 rating at 1.6mm)
- High thermal stability
- Good weather resistance
- Excellent colorability
- Low smoke density (<100), no toxic or corrosive gases during combustion
3. Applications
Barium sulfate is a recognized classic flame retardant in industries like rubber, plastics, and resins. It provides flame retardancy, smoke suppression, and mitigation. In the plastics industry, it serves as a smoke suppressant. It improves the adsorption, durability, abrasion resistance, corrosion resistance, and heat resistance of paints, rubbers, and plastics. It also enhances mechanical properties, increases transparency, and improves fire resistance. So it is suitable for applications in anti-corrosion coatings, fire protection, high-temperature resistance, architectural coatings, various industrial and civil coatings.
