Biobased crosslinkable binders for recyclable paper packaging

Overview

Renuvix has developed a family of biobased crosslinkable polymeric binders designed for paper packaging coatings. These binders are structurally similar to styrene-based sizing agents commonly used in paper manufacturing, but offer the added advantage of crosslinkability and improved recyclability. The technology targets the growing need for sustainable packaging solutions that maintain performance while supporting circular economy goals in paper recovery and recycling.

The binders are hydrophobic and can be cured to form matrices that bind mineral fillers, pigments, and other additives to paper substrates. This enhances barrier performance for coated paper applications. Unlike synthetic paper coatings such as non-degradable hot-melts and latexes, Renuvix biobased crosslinked coatings can undergo hydrolysis under alkaline conditions, which helps eliminate stickies during fiber recovery processes.

Technical specifications

Key features and capabilities:

• Biobased crosslinkable polymeric formulations suitable for paper barrier coatings
• Hydrophobic resin matrices that bind fillers, pigments, and additives to paper
• Performance comparable to certain synthetic styrene-based sizing agents
• Hydrolytic degradation capability under basic conditions, enabling disintegration during fiber recovery
• Potential to eliminate stickies commonly caused by non-degradable hot-melts and latex coatings

Testing capabilities available:

• Water vapor transmission rate (WVTR)
• Cobb test for water absorption
• Water contact angle (WCA)
• Grease resistance evaluation
• Tensile strength measurement
• Additional methods such as fiber recovery assessment can be established through consultation

Technology readiness level

The crosslinkable biobased binders are currently in the developmental stage with promising initial results. Free films of the biobased crosslinked resins have demonstrated hydrolytic degradation under basic conditions in laboratory studies. When incorporated into paper coating formulations, the binders have shown performance similar to some synthetic styrene-based sizing agents.

Renuvix is considering establishing a research partnership, including signing an NDA/MTA, to define a detailed validation plan. Future validation activities may include fiber recovery testing and additional barrier performance evaluations, potentially with support from academic partners such as Western Michigan University. The technology requires further development and validation before commercial readiness.