Description

1.Basic Product Information

Product Name: TDI / Toluene Diisocyanate

Alias: Toluene-2,4-Diisocyanate, Aromatic Diisocyanate, PU Isocyanate Monomer

CAS No.: 26471-62-5

Molecular Formula: C₉H₆N₂O₂

MolecularWeight: 174.1 g/mol

Molecular Structure:

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Available Grades: T80 (80/20), T65 (65/35), T100 (High-purity 2,4-TDI)

2.Product Overview

TDI (Toluene Diisocyanate) is one of the most critical aromatic isocyanate monomers in the polyurethane industry, serving as the core reactive raw material matched with polyether and polyester polyols. Available in mainstream industrial grades including T80 (80/20), T65 (65/35) and T100, TDI features high reaction activity, stable cross-linking performance and excellent processing adaptability. It mainly reacts with hydroxyl groups to form flexible polyurethane foam, and is also widely used in PU coatings, adhesives, sealants and elastomer (CASE) products. With mature application technology and stable batch performance, TDI is the fundamental industrial raw material for household, automotive, insulation and industrial PU manufacturing.

3.Typical Specifications

Test Item	Standard Specification
Appearance	Colorless to pale yellow transparent oily liquid
Total Purity	≥ 99.7%
2,4-TDI Isomer Content	80% / 65% / 99% (Different grades)
NCO Content	48.2–48.8%
Viscosity (25℃, mPa·s)	3–5
Density (25℃, g/cm³)	1.22–1.23
Hydrolyzable Chlorine	≤ 0.01% max
Total Acidity (as HCl)	≤ 20 ppm max
Color Number (APHA)	≤ 20

4.Physical & Chemical Properties

Physical Properties

TDI is a low-viscosity transparent oily liquid at room temperature with stable physical state and good fluidity. It features moderate volatility and excellent miscibility with polyether polyols, polyester polyols, organic solvents and various PU additives. Different isomer ratios endow each grade with unique processing characteristics: T80 adapts to universal flexible foaming, T65 suits fine and soft foam products, and T100 is specialized for high-end elastomer and coating systems. No precipitation or stratification occurs during standard batching and production.

Chemical Properties

TDI contains highly active double isocyanate (-NCO) groups, which can rapidly and stably undergo cross-linking polymerization reaction with hydroxyl (-OH) groups in polyols. It presents controllable reaction activity, moderate curing speed and stable foaming molding performance. The aromatic molecular structure endows cured PU products with excellent mechanical strength, wear resistance and chemical stability. Strictly controlled chlorine and acidity values effectively avoid abnormal reactions, ensuring stable reaction consistency during continuous industrial production. TDI is sensitive to water and alkaline substances, requiring strict moisture-proof storage and usage.

5.Main Applications

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9.Finemax Advantages

Finemax Chemical supplies full-series high-quality TDI products including T80, T65 and T100 grades. Our TDI features high purity, low acidity, low hydrolyzable chlorine and stable NCO content, ensuring consistent reaction activity across batches. We strictly control product stability to help PU manufacturers optimize foaming quality, reduce defective rates and stabilize product performance. With complete hazardous goods export qualifications, sufficient stable inventory and professional technical support, we provide one-stop reliable isocyanate raw material solutions for global polyurethane industrial customers.

10.Inquiry & Service

Free Sample Support | Full Grade Options | Professional Formula & Safety Guidance

Contact us to get the latest factory wholesale price and complete technical datasheet.

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