Color Stable MOCA-HR: High-Temperature Resistant Aromatic Diamine Curing Agent

Chemical Information

• Chemical Name: 3,3’-Dichloro-4,4’-diaminodiphenylmethane
• Molecular Formula: C₁₃H₁₂N₂Cl₂
• Molecular Weight: 267.16
• CAS Number: 101-14-4
  
  Specifications Table
  

  Item	Specification
  Appearance	Pale yellow granular pellet (MOCA-HR)
  Melting Point (℃)	≥ 97
  Moisture (%)	< 0.30
  Solid Density (24 ℃) (g·cm⁻³)	1.44
  Liquid Density (107 ℃) (g·mL⁻¹)	1.26
  Amine Equivalent	131 – 136
  Free Amine (%)	< 1.00
  Color (Gardner)	< 4
  Insoluble Matter (%)	< 0.04
  Hygroscopicity	None
  Storage Condition	Airtight storage in a dry area, away from direct sunlight
  Solubility	Easily soluble in DMF, DMSO, MEK and THF; soluble in ethanol, toluene and benzene; insoluble in water.
  Safety	LD₅₀ (rats) ＞ 5000 mg/kg. Wear a mask, gloves and goggles during handling.

  
  

  Advantages

  MOCA-HR exhibits excellent high-temperature resistance and color stability. Even when heated or reheated multiple times (with the maximum heating temperature reaching up to 150℃), the melted MOCA-HR liquid remains light yellow, clear and transparent without any color change or turbidity.
  
  

  Applications

  MOCA-HR serves as an aromatic diamine chain extender or curing agent for polyurethane. It is specifically suitable for the production of various cast polyurethane elastomer parts via casting machines, and contributes to the light color of the final products (a key advantage for appearance-sensitive applications).

   

  Additionally, MOCA-HR can be used as a curing agent for epoxy resins.
  
  

  Packaging

  • Net Weight: 50 kg per unit
  • Packaging Material: Carton drum with an inner black polyethylene liner (ensures moisture resistance and product purity)