MOCA-HR: High-Temperature Stable Curing Agent for Light-Colored Cast Polyurethane Elastomers

MOCA-HR: High-Temperature Stable Curing Agent for Light-Colored Cast Polyurethane Elastomers
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 is a high-performance aromatic diamine curing agent engineered to deliver exceptional thermal stability and superior color retention under demanding processing conditions.

  Even under prolonged or repeated heating cycles, withstanding peak temperatures of up to 150°C, the molten MOCA-HR maintains a consistently light yellow, clear, and transparent appearance. It exhibits no signs of discoloration, turbidity, or thermal degradation, ensuring stable and predictable curing performance.

  This outstanding thermal and chromatic stability makes MOCA-HR particularly suitable for applications requiring high-temperature processing, re-melting operations, or stringent aesthetic requirements where consistent product appearance is critical.

  
  

  Applications

  MOCA-HR is a high-performance aromatic diamine that functions as both a chain extender and curing agent for polyurethane systems. It is specifically formulated for use in cast polyurethane elastomer production, particularly in applications utilizing casting machines for precise and efficient processing.

  
  

  One of its standout features is its ability to impart exceptional light color stability to the final polyurethane products—an essential advantage for applications where appearance, transparency, or color consistency is critical.

  In addition to its role in polyurethane systems, MOCA-HR also serves as an effective curing agent for epoxy resins, offering versatility across different thermoset material formulations.

  
  

  With its excellent thermal stability, consistent performance, and aesthetic benefits, MOCA-HR is an ideal choice for manufacturers seeking high-quality, visually appealing cast elastomers and durable epoxy systems.

  
  

  Packaging

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

Qingdao Exceed Fine Chemicals Co., Ltd is a high-tech enterprise that integrates manufacturing and trading. We specialize in the production of polyurethane-based products.

Our company is dedicated to investing in research and development of cutting-edge products, collaborating with leading Chinese universities and institutions. We have successfully developed a heat-vulcanization, environmentally friendly bonding adhesive that rivals the quality of world-renowned brands like Lord and Dow.

At Exceed, we believe in the power of science

Qingdao Exceed Fine Chemicals boasts a team of over 30 skilled technicians, supported by advanced manufacturing equipment and robust production processes. We maintain an independent R&D institute and foster strong collaborations with leading universities and research institutions to continuously enhance our production processes, product quality, and performance.

With decades of dedicated efforts, we have successfully exported our products to markets across the globe, including Europe, Asia, North America, South America, Oceania, and Africa.

Furthermore, leveraging our extensive domestic network, we act as a reliable purchasing agent, assisting customers in sourcing specific materials according to their unique requirements.

 Furthermore, we employ a dedicated team of quality control (QC) professionals with expertise in the field of chemicals. This rigorous quality control ensures consistent and reliable product quality for our valued customers.

Currently, we achieve annual export sales exceeding USD 30 million to over 30 countries worldwide, encompassing a diverse product range including polyurethane chemicals, heat-vulcanization environmental friendly bonding adhesive etc.

We understand that customers prioritize competitive pricing, exceptional quality, and consistent product availability. We firmly believe that Exceedchem is the ideal partner to fulfill your specific needs.

As a trusted purchasing agent for clients worldwide, we leverage our extensive experience to source high-quality products at competitive prices. Our primary objective is to deliver the most cost-effective solutions while maintaining the highest standards of quality.