Crosslinkable olefinic lactone monomer for biodegradable polyester coatings

Overview

The crosslinkable olefinic lactone monomer, developed from CO2 and bio-olefins, presents a transformative solution for creating biodegradable olefinic polyesters. This monomer integrates olefin and ester functionalities, facilitating the synthesis of polyesters that are not only inherently biodegradable but also exhibit low viscosity, making them suitable for spray applications. By enabling crosslinking through acrylate or thiol chemistry, the monomer enhances the performance and recyclability of polyesters, particularly in fiber-based beverage packaging.

Technical specifications

• CO2-derived monomer: Combines olefin and ester functionalities.
• Biodegradable polyesters: Designed for low viscosity (80-200 cP) and food-contact safety.
• Crosslinking capability: Utilizes acrylate or thiol chemistry for rapid curing.
• Compatibility: Copolymerizes with common lactones and lactide, converting conventional polyesters into curable resins.
• Application: Suitable for spray-applied coatings, achieving target film thicknesses of 5-12 µm.
• Performance: Meets OTR and WVTR targets while maintaining flexibility and crack resistance.

Technology readiness level

This technology is at TRL 2, indicating that the concept has been formulated and initial studies have been conducted. Future validation steps include optimizing formulation and rheology, conducting spray and cure trials, assessing barrier properties, and ensuring repulpability. Collaboration with industry partners is sought for joint trials and third-party verification.