High-Purity DDI Solutions for Aviation Polymers & High-Performance Coatings

For aerospace manufacturers, selecting the right Dimer Acid Diisocyanate (DDI) is critical to ensure polymer stability, long-term durability, and compatibility with demanding flight environments. As a professional producer of high-purity isocyanate monomers, Ruifeng Polymer offers aerospace-grade DDI designed for high-performance polymers, structural adhesives, elastomers, and protective coating systems used across aviation and space applications.

Why Aerospace Manufacturers Choose High-Purity DDI

Aviation materials must maintain long-term performance under high temperature cycles, strong UV exposure, fuel contact, hydraulic oil, rapid pressurization, and vibration fatigue. Aerospace-grade DDI provides meaningful advantages compared with traditional isocyanates:

● Non-yellowing molecular structure

Ensures long-term appearance and clarity stability for coatings and protective films, especially for transparent or light-colored aerospace polymers.

● Excellent hydrolysis and oxidation resistance

Critical for components exposed to moisture, de-icing agents, chemical washes, and atmospheric oxidation at altitude.

● Flexible aliphatic backbone

Ideal for polymers requiring low-temperature elasticity, impact resistance, and anti-cracking properties during flight cycles.

● Superior reactivity control

Ensures predictable curing behavior for precision composite layups, aerospace adhesives, RTV sealants, and elastomer components.

● Reduced VOC & eco-friendly characteristics

Supports cleaner production and meets compliance expectations from aviation material regulators.

Application Areas Where Aerospace-Grade DDI Delivers Value

1. Aircraft Structural Adhesives & Bonding Systems

DDI-based polyurethane adhesives offer strong adhesion to carbon fiber composites, aluminum alloys, and engineering plastics. They maintain bonding strength during thermal cycling from –55°C to 120°C. This makes them suitable for:

• Composite panel bonding

• Fairing and cabin part assembly

• Interior structural bonding systems

• Aerospace-grade repair adhesives

2. High-Performance Aerospace Coatings

DDI enhances coating flexibility, UV-resistance, and long-term stability. Suitable for:

• Aircraft exterior protective coatings

• Anti-corrosion coatings for landing gear

• Fuel-resistant coatings for tanks and pipelines

• Non-yellowing topcoats for aircraft interiors

3. Elastomers & Sealing Materials

The flexible structure of DDI allows the creation of elastomers with excellent shock absorption and chemical resistance:

• Fuel-resistant O-rings & seals

• Low-temperature gaskets

• Vibration dampening components

• High-altitude elastomer membranes

4. Specialty Aerospace Polymers

Including:

• Polyurethane hot-melt adhesives

• High-flexibility TPU formulations

• Low-density polymer foams

• Encapsulation materials for avionics

Key Evaluation Dimensions for Aerospace Buyers

Purity & molecular consistency

Stable NCO content, minimal side products, and batch-to-batch uniformity are essential for aerospace manufacturers dealing with precise polymer formulations.

Long-term performance data

Buyers expect verified thermal aging tests, UV resistance data, chemical resistance reports, mechanical property curves, and compatibility studies.

Compliance with international aviation standards

Although DDI is a raw material, documentation supporting downstream certification requirements—such as material traceability, SDS, and quality system files—is key.

Supply chain stability & delivery reliability

Aerospace companies need secure access to stable monomer supply, consistent lead time, and multi-batch production traceability.

Technical guidance for formulation

R&D teams often require support to optimize NCO–OH stoichiometry, curing behavior, viscosity control, and polymer compatibility.

Packaging safety & transportation quality

High-purity isocyanates require moisture-controlled logistics and sealed industrial packaging to ensure performance integrity.

Why Work with Us for Aerospace-Grade Dimer Acid Diisocyanate

We combine high-precision chemical synthesis with advanced purification technology to ensure DDI products suitable for demanding aerospace polymer applications.

● High-purity grade for aviation use

Optimized process guarantees low hydrolyzable chlorine, controlled viscosity, and consistent NCO content.

● Dedicated aerospace production line section

Moisture-controlled environment, strict filtration, and carefully managed reaction steps.

● Technical support from formulation to application

Including: compatibility studies, curing optimization, composite adhesive system guidance, and coating system adjustment.

● Reliable supply & customized specifications

Flexible order quantities, export packaging options, and custom NCO content specifications available upon request.

Partner With a Professional Aerospace-Grade DDI Manufacturer

Whether you are developing advanced structural adhesives, aviation coatings, or high-performance elastomers, Ruifeng Polymer can supply aerospace-grade Dimer Acid Diisocyanate with stable quality, reliable delivery, and technical support throughout your project cycle.