Description

1.Basic Product Information

Product Name: MOCA / 4,4'-Methylene‑bis‑(2‑chloroaniline)

Alias: MBOCA, 3,3'-Dichloro‑4,4'-diaminodiphenylmethane

CAS No.: 101‑14‑4

Molecular Formula: C₁₃H₁₂Cl₂N₂

Molecular Weight: 267.15 - 267.16g/mol

Molecular Structure:

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Grade Type: Industrial grade / High-purity refined grade (granule, flake, powder)

2.Product Overview

MOCA (MBOCA) is a classic aromatic diamine curing agent and chain extender specially used for cast polyurethane elastomer systems. As a solid amine product, it requires heating and melting before use. After cross-linking with PU prepolymers, it endows finished products with high modulus, excellent wear resistance, mechanical strength and thermal stability. With mature application and cost advantages, it is a benchmark material for traditional cast PU production, while liquid DMTDA (E-300) serves as a safer heating-free alternative for modern production.

3.Typical Specifications

Test Item	Standard Specification
Appearance	Light yellow granule / flake / powder
Purity (HPLC)	≥98.5%
Initial Melting Point	≥102 ℃
Amine Equivalent	131–136 g/eq
Moisture Content	≤0.15% max
Acetone Insoluble Matter	≤0.04% max
Solubility	Soluble in acetone, DMF, DMSO; insoluble in water

4.Physical & Chemical Properties

Physical Properties

MOCA is a light yellow solid at room temperature, which must be fully melted by heating before mixing with PU prepolymers. Molten MOCA features low viscosity and good fluidity. It is soluble in polar organic solvents but insoluble in water. Qualified MOCA has stable storage performance, and repeated melting and crystallization will not affect its basic performance. Dust control is required during operation.

Chemical Properties

As an aromatic diamine curing agent, MOCA stably reacts with -NCO groups of PU prepolymers to form high-density cross-linked structures. It offers moderate reaction speed and long pot life, ensuring sufficient casting operation time. Cured PU products gain high hardness, excellent tensile and tear strength, wear resistance and thermal stability. It can also be used for partial epoxy resin curing, with strict personal protection required during handling.

5.Main Applications

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9.Finemax Advantages

Finemax Chemical provides industrial and high-purity grade MOCA with stable melting point, low moisture and consistent batch quality, fully meeting traditional cast PU production needs. We also supply liquid DMTDA (E-300) as a heating-free alternative. With strict quality control and stable supply, we offer reliable aromatic amine chain extender solutions for global PU elastomer manufacturers.

10.Inquiry & Service

Free Sample Support | Multiple Grades | Professional Technical Guidance

Contact us for the latest factory price and complete technical datasheet.