Pla-compatible self-crosslinking polyesters for biodegradable injection molding

Overview

The proposed solution is a groundbreaking biodegradable thermoplastic resin designed for injection molding. It combines polylactic acid (PLA) with LoopCO₂’s unique allyl-functionalized liquid polyesters, acting as reactive plasticizers. This innovative blend enhances elongation and facilitates foaming, achieving densities below 1 while maintaining recyclability and compostability. The "plasticize–foam–lock" process stabilizes the foam using a mild radical initiator, ensuring the resin remains a recyclable thermoplastic rather than a permanent thermoset. This technology is particularly suited for applications demanding lightweight, sustainable materials.

Technical specifications

• Reactive Plasticizers: Allyl-functionalized liquid polyesters improve elongation and foam stability.
• Density and MFI: Achieves densities <1 and tunable melt flow index (MFI) of 25–55 (ASTM D1238).
• Recyclability: Compatible with PET/fiber recycling through float/sink separation.
• Biodegradability: Inherently biodegradable, potentially suitable for food-contact applications.
• Self-Crosslinking: Mild heat-triggered initiator induces partial crosslinking, stabilizing foam without permanent thermosetting.
• Validation and Development: Initial concepts demonstrated at TRL2, with plans to advance to TRL4 within 12–18 months.

Technology readiness level

The technology is currently at TRL2, with foundational concepts like monomer synthesis, self-crosslinking, and foaming demonstrated. Future validation aims to achieve TRL4, involving optimization of blends, pilot-scale injection molding, and comprehensive recycling and regulatory testing. Partners are sought to assist in pilot molding, recycling simulations, and regulatory assessments to accelerate development.