Novel Bio-based Non-isocyanate Polyurethane Based on Carbamate-aldehyde Crosslinking

This technology offers a biobased, non-isocyanate two-component (2 K) polyurethane coating system, designed for high-performance surface protection. It features a polycarbamate resin derived from vegetable oils such as a soybean-oil alkyd or epoxidized sucrose soyate, which is cross-linked with a dialdehyde, either petro-derived (e.g., 1,4-cyclohexanedicarboxaldehyde) or bio-derived (e.g., 2,5-diformylfuran). The cross-link reaction between the carbamate and dialdehyde yields a robust polyurethane-type network without using isocyanates, enabling ambient or heat cure and achieving high functionality, fast tack-free times, and solid performance metrics.

Benefits

• Non-isocyanate chemistry eliminates toxic and moisture-sensitive components for safer handling and manufacturing
• High bio-based content derived from renewable polycarbamates and dialdehydes
• Excellent coating performance with strong adhesion, hardness, and chemical resistance
• Fast curing at ambient or low temperatures, improving production efficiency
• Low-VOC and environmentally compliant alternative to traditional polyurethane systems
• Versatile formulation adaptable for clear or pigmented coatings
• Improved sustainability profile supporting green chemistry and regulatory initiatives
• Comparable or superior durability to conventional 2K polyurethane coatings

Applications

• Industrial and protective coatings for metal, concrete, and composite substrates
• Automotive and transportation finishes requiring high durability and chemical resistance
• Architectural and wood coatings with low-VOC, environmentally friendly formulations
• Floor coatings and sealants offering fast cure and strong abrasion resistance
• Marine and corrosion-resistant coatings for offshore and coastal structures
• Aerospace and equipment coatings where non-isocyanate chemistry improves safety and compliance
• General manufacturing and OEM coatings seeking sustainable, high-performance alternatives to traditional 2K PU systems

Patents

This technology is issued a US Patent 11,639,450, and is available for licensing/partnering opportunities.