Nano-architected cka-co-alkyl acrylate polymers for sustainable packaging coatings
UV-initiated degradable polymer coatings that combine cyclic ketene acetals with acrylate chemistry to improve backbone degradability. Compatible with 3D printing and interference lithography for scalable, solution-processable barrier coatings on paper-based packaging.
Overview
This solution introduces a new class of nano-architected polymers designed for sustainable packaging. By incorporating cyclic ketene acetals (CKAs) into acrylate-based photoresins, the technology enables UV-initiated coatings that break down more readily than conventional acrylate polymers. The chemistry is compatible with additive manufacturing methods, including 3D printing and interference lithography, making it suitable for scalable production of barrier coatings on paper-based packaging materials.
Technical specifications
Key features:
- Radical ring-opening polymerization (rROP) of CKAs introduces heteroatoms into the polymer backbone, substantially improving degradability compared to standard carbon-carbon acrylate networks
- UV-initiated photopolymerization compatible with existing acrylate-based free radical chemistry, enabling rapid curing under light
- Tunable monomer composition using CKAs such as MDO, BMDO, and MPDL combined with alkyl acrylates to balance hydrophobicity, flexibility, and barrier performance
- Validated copolymerization behavior confirmed by NMR spectroscopy, with experimental incorporation data matching reactivity-ratio models
- Hydrolytic degradation demonstrated in alkaline conditions, with MPDL-containing samples showing the highest mass loss
- Scalable processing via solution coating for paper substrates and interference lithography for structured form factors
- Crosslinking option with bisacrylate crosslinkers to enhance durability and barrier properties
Technology readiness level
The technology is at an early-to-mid stage of development. Preliminary NMR characterization has confirmed successful incorporation of CKA monomers into acrylate copolymers, and hydrolytic degradation testing has demonstrated measurable mass loss under alkaline conditions. Next steps include systematic synthesis and characterization of additional CKA-co-alkyl acrylate compositions, optimization of crosslinker content for durability, and evaluation of oxygen and water vapor transmission rates on coated paper substrates. The work is positioned for further validation and scale-up toward packaging-relevant applications.
About California Institute of Technology
Caltech is a private, STEM-focused research university in Pasadena, notable for its small size, graduate intensity, and tightly integrated academic–research culture. Companies engage through shared user facilities for micro/nanofabrication and advanced instrumentation, prototyping shops, and contract mechanisms managed by experienced corporate‑partnership staff. An affiliated NASA laboratory, the Jet Propulsion Laboratory, and the surrounding Southern California aerospace and deep‑tech cluster provide unique pathways to mission‑driven engineering, rigorous testing, and specialized suppliers. Research here is backed by competitive federal funding from agencies such as NSF, NIH, DOE, NASA, and the Department of Defense. A dedicated technology transfer office streamlines IP protection, licensing, and startup formation, connecting innovators with investors and regional accelerators.
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