Plant oil-based compostable adhesives for flexible PHA films
Sustainable adhesive technology using plant oil-based acrylic monomers (POBMs) for compostable PHA film applications. Enables equivalent or superior performance versus petroleum-based benchmarks while supporting compostability, water resistance, and easier recycling.
Overview
This solution offers a new class of compostable adhesives built from plant oil-based acrylic monomers (POBMs) designed for flexible polyhydroxyalkanoate (PHA) films and related substrates. The technology addresses growing demand for sustainable packaging by replacing petroleum-based adhesives with renewable, compostable alternatives that deliver comparable or better bonding performance.
Key advantages include tunable viscoelastic properties, improved water resistance, and the ability to tailor performance characteristics by selecting POBMs derived from different oils. Because the resulting polymers are compostable, they can simplify end-of-life recycling and reduce regulatory burden related to health and safety compliance.
Technical specifications
- Feedstock flexibility: POBMs can be synthesized from olive, soybean, linseed, corn, high-oleic soybean, high-linoleic soybean, canola oil, and potentially any triglyceride oil or fat
- High bio-content: Binary and ternary latex copolymers containing up to 70 wt% POBMs have been demonstrated
- Lab-scale synthesis capability: 2-liter batch synthesis of POBMs and 1-liter batch latex production
- High solids formulations: POBM-based acrylic latexes with solids content up to 47%
- Performance equivalence: On paperboard substrates, the adhesives match or exceed commercial petroleum-based benchmarks, in some cases causing substrate failure during testing
- Tunable properties: Glass transition temperature, film-forming behavior, moisture resistance, toughness, and adhesion can be controlled through latex composition and oil selection
- Target application properties: Designed to deliver proper rheology, tack, peel strength, and shear performance for flexographic printing and adhesion to metal and ink layers
Technology readiness level
Current development is at laboratory scale with demonstrated feasibility of POBM synthesis, latex copolymerization, and adhesive formulation on paperboard substrates. The next phase of work (6–9 months) focuses on achieving the right balance of viscoelastic and rheological properties for flexographic application, evaluating adhesion to PHA films and metal substrates, and conducting compostability testing on best-performing formulations. The technology is positioned for collaborative development toward pilot-scale validation and eventual commercialization in sustainable flexible packaging.
About North Dakota State University (NDSU)
North Dakota State University is a comprehensive public land‑grant research university (R1) in Fargo with a pragmatic, industry‑engaged culture. Companies engage through an adjacent research and technology park offering incubator space and prototyping resources, and shared high‑performance computing supports data‑intensive work. Pilot‑scale processing facilities and co‑located labs in the Peltier Complex and the campus pilot plant help de‑risk scale‑up and validate manufacturing processes. A statewide Extension network provides access to field sites, stakeholders, and dissemination channels for real‑world testing and deployment. Research is backed by competitive federal funding from agencies such as the National Science Foundation and the U.S. Department of Agriculture, and a dedicated technology transfer office streamlines IP, licensing, and startup formation.
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