polymeric isocyanate (MT-44V20)

Introduction

Polymeric isocyanate MT-44V20 is a high-performance crosslinking agent designed for polyurethane coatings, adhesives, and elastomers. This aromatic polyisocyanate offers excellent mechanical properties, chemical resistance, and fast curing characteristics. Below, we present key technical data through structured tables covering its properties, reactivity, formulation guidelines, and performance.

1. Fundamental Physical & Chemical Properties

Table 1: Basic Specifications

2. Reactivity & Curing Performance

Table 2: Curing Behavior with Common Polyols

3. Formulation Guidelines

Table 3: Recommended Formulations by Application

4. Cured Film Performance

Table 4: Mechanical & Chemical Resistance Properties

*Tested in 10% H₂SO₄, 10% NaOH, and diesel fuel.

Key Features

✔ Fast curing at ambient temperatures
✔ High chemical & abrasion resistance
✔ Excellent adhesion to metals, plastics, and composites
✔ Low viscosity for easy processing
✔ Compatible with various polyol systems

Recommended Applications

• Protective coatings (industrial, marine, automotive)

• Structural adhesives (metal bonding, composites)

• Elastomers (wear-resistant parts, seals)

• Flooring systems (chemical-resistant, high-traffic)

Processing & Safety Notes

• Mixing ratio: Typically NCO:OH = 1.05-1.15:1

• Pot life: 20-90 min (depends on polyol reactivity)

• Cure schedule: 24h@25°C or 1h@80°C

• Storage: 6 months in sealed containers (<30°C)

• Safety: Use PPE (gloves, goggles, ventilation)