• Excellent resistance to yellowing and ultraviolet (UV) degradation

• Superior gloss retention and weatherability

• Provides high transparency, outstanding mechanical strength, and chemical resistance

• Low volatility and low toxicity, offering a more environmentally friendly alternative to aromatic diisocyanates

🧪 1. Coatings

1. Polyurethane Coatings (PU Coatings)
IPDI is a key raw material for the preparation of aliphatic polyurethane prepolymers or NCO-terminated resins (such as IPDI trimer or IPDI biuret).
Features:

• Excellent UV and yellowing resistance (superior to TDI and MDI)

• Outstanding gloss and color retention

• High durability and weatherability
  Typical applications:

• Automotive, aircraft, and marine topcoats

• Wood varnishes, plastic coatings

• High-performance anti-corrosion coatings for outdoor exposure

🧴 2. Adhesives and Sealants

IPDI reacts with polyether or polyester polyols to form flexible and weather-resistant polyurethane adhesives.
Advantages:

• Low monomer content (low VOC)

• Excellent heat and hydrolysis resistance
  Applications:

• Construction sealants, automotive assembly adhesives

• Electronic encapsulants

• Laminating adhesives for flexible packaging

🧰 3. Elastomers

Used in the production of aliphatic polyurethane elastomers (PU Elastomers) with:

• High tensile and tear strength

• Excellent abrasion resistance and UV stability
  Applications:

• Transparent optical components (e.g., lenses, clear tubing)

• Medical devices, sports equipment, precision mechanical parts

💧 4. Waterborne Polyurethane Dispersions (PUD)

IPDI is one of the main diisocyanates used for producing high-performance waterborne polyurethanes (WPU).
It plays a key role in achieving high transparency, flexibility, and non-yellowing appearance.
Applications:

• Leather and textile coatings

• Eco-friendly wood and industrial coatings

• Waterborne adhesive systems

🔬 5. Specialty Applications

1. UV-Curable Polyurethane Acrylates (PUA)
IPDI is used to synthesize urethane acrylate oligomers or monomers with excellent flexibility and scratch resistance.
Applications:

• UV-curable inks, electronic coatings, optical materials

2. Medical and Optical Polymers
Due to its low toxicity and chemical stability, IPDI-based polymers are used in:

• Medical coatings and biocompatible materials

• Transparent optical resins

⚗️ 6. Comparison with Other Diisocyanates