Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Ohara CR-504L Polyurethane Flame Retardant

Ohara CR-504L is a halogen-free polyurethane flame retardant from Ohara’s CR series, engineered for flexible foam applications. It delivers UL94 V-0 rating, low smoke density, and excellent compatibility with polyester/polyether PU systems while maintaining foam physical properties and processability.
  • ohara cr 504l polyurethane flame retardant_3b4426e0
  • ohara cr 504l polyurethane flame retardant_3b4426e0

Features Of Ohara CR-504L Polyurethane Flame Retardant

  1. Halogen-free formulation ensures low smoke density and reduced toxic gas emission during combustion.

  2. Excellent compatibility with flexible and rigid polyurethane foam systems without compromising physical properties.

  3. Effective flame retardancy achieving UL 94 HF-1 and FMVSS 302 compliance in standard formulations.

  4. Thermally stable up to 220°C, supporting conventional PU processing conditions including slabstock and molded foam production.

  5. Low volatility and minimal migration, contributing to long-term flame-retardant performance retention.

Typical Applications Of Ohara CR-504L Polyurethane Flame Retardant

  1. Flexible polyurethane foam for automotive seating and interior trim.

  2. Rigid polyurethane insulation panels used in building envelope and cold storage applications.

  3. Upholstered furniture foam meeting CAL TB 117-2013 and UK Furniture & Furnishings (Fire) (Safety) Regulations.

  4. Transportation interior components including railcar and bus seating foams.

  5. Medical equipment cushioning requiring low-smoke, halogen-free fire safety performance.

Specifications Of Ohara CR-504L Polyurethane Flame Retardant

Chemical TypeOrganophosphorus-based flame retardant
Product FormLight yellow to pale amber viscous liquid
AppearanceClear, homogeneous liquid at room temperature
Density (25°C)1.28–1.32 g/cm³
Viscosity (25°C)350–550 mPa·s
Phosphorus Content16.5–17.5 wt%
Flash Point (COC)≥220°C
Storage StabilityStable for ≥12 months at 5–30°C in sealed containers


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