TOLUENE DIISOCYANATE - TDI - T80/20

What Is TDI (Toluene Diisocyanate) – T80/20?

TDI is one of the most important diisocyanate chemicals used in the production of polyurethane.
TDI 80/20 is a blend of two isomers:

• 80% 2,4-TDI
• 20% 2,6-TDI

This ratio provides optimal reactivity and processing performance in polyurethane foam and elastomer production.

TDI is globally the standard raw material especially for flexible polyurethane foam manufacturing.

What Is TDI – T80/20 Used For?

The primary function of TDI is to react with polyols to form polyurethane.

In this process, TDI provides the following functions:

1. Creates Polyurethane Foam

It provides the cellular structure required for flexible foam and cushioning materials.

2. Controls Reactivity

The 80/20 isomer ratio optimizes foam hardness, rise profile, and mechanical strength.

3. Adds Mechanical and Chemical Durability

Polyurethane produced with TDI is:

• Flexible
• Lightweight
• Compression-resistant
• With excellent recovery properties

4. Serves as a Key Binder in Adhesives and Coatings

TDI is a fundamental component in strong polyurethane-based adhesives.

Purposes of TDI – T80/20

1. Production of Flexible Polyurethane Foam

This is the largest application area. Common products include:

• Furniture cushions
• Mattress and pillow foams
• Automotive seat foams
• Packaging foams

2. Adhesive Manufacturing

Used in the production of high-strength PU adhesives such as:

• Wood adhesives
• Leather and footwear adhesives
• Industrial assembly adhesives

3. Coatings and Elastomer Production

TDI serves as a binder for various polyurethane coatings:

• Flexible coatings
• Varnishes
• Waterproofing coatings
• Elastomeric seals

4. Insulation and Spray Foam Systems

Used in certain formulations for PU spray systems.

Industries That Use TDI – T80/20

• Furniture Industry (foam)
• Automotive Industry (seat and interior foams)
• Footwear & Leather Industry
• Packaging Sector
• Construction (coatings, PU systems)
• Adhesive manufacturers
• Textile coating applications

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