Sustainable, bio-based polymer from soybean hulls for zero-VOC inks and Kit 12 PFAS-free coatings.

Background

The industrial manufacturing of inks, paints, adhesives, and paper coatings relies heavily on high-performance polymer binders to provide essential mechanical strength, barrier properties, and adhesion. As global manufacturing sectors increasingly prioritize sustainability, there is a critical need to transition away from traditional, fossil-fuel-derived materials toward renewable, bio-based alternatives. Industries require sustainable solutions that support circular economy initiatives by valorizing abundant agro-industrial byproducts. Furthermore, modern packaging and printing applications demand materials that can withstand high-temperature industrial processes while maintaining optimal rheology for high-speed manufacturing.

Despite this urgent demand, current approaches predominantly utilize petroleum-based polymers, such as conventional petrochemical acrylics, which present significant environmental and health challenges. These traditional binders frequently emit volatile organic compounds (VOCs) and often rely on per- and polyfluoroalkyl substances (PFAS) to achieve grease resistance. Both chemical classes are highly toxic and face increasingly stringent global regulations. Additionally, many commercial acrylic polymers exhibit limited thermal stability, making them susceptible to degradation. The continued reliance on non-renewable fossil fuels not only exacerbates environmental degradation but also ignores the potential of agricultural waste streams, keeping the industry tied to unsustainable, toxic practices.

Technology

This sustainable, bio-based polymer is derived from soybean hulls through an acid-catalyzed thermochemical process. The water-soluble, PFAS-free material features a hybrid lignin-carbohydrate structure producing zero volatile organic compound (VOC) emissions. It boasts exceptional thermal stability up to 450°C and a glass transition temperature of 116°C, enabling the formation of durable, continuous films. The biopolymer exhibits shear-thinning rheology, making it an effective binder and rheology modifier for high-speed flexographic printing, paints, and adhesives. It also functions as a robust barrier coating and mechanical reinforcer for paper substrates.

This technology is highly differentiated by its ability to replace petroleum-based polymers by valorizing an abundant agricultural byproduct, driving circular economy initiatives. Unlike conventional acrylics, it delivers superior barrier performance, elevating paper grease resistance to Kit #12 and drastically reducing air permeability. It also significantly enhances substrate mechanics, increasing burst strength by 56% and tensile energy to break by 184%. In water-based inks, it matches the color development, adhesion, and rapid drying times of commercial petrochemical binders while remaining entirely non-toxic. This unique combination of high-performance reinforcement, barrier protection, and eco-friendly composition distinctly separates it from traditional industrial polymers.

Benefits

• Provides a sustainable, bio-based alternative to petroleum polymers by repurposing abundant agricultural byproducts like soybean hulls.
• Ensures environmental and health safety by being completely non-toxic, PFAS-free, and producing zero volatile organic compound (VOC) emissions.
• Delivers exceptional barrier properties for packaging, significantly improving oil and grease resistance while reducing water vapor transmission and air permeability.
• Enhances the mechanical strength of coated materials, substantially increasing tensile strength, burst strength, and folding endurance.
• Exhibits outstanding thermal stability, capable of withstanding temperatures up to 450°C for durability during high-temperature industrial processing.
• Features shear-thinning rheology optimized for high-speed printing and coating, offering fast drying times, strong adhesion, uniform color development, and excellent rub resistance.

Applications

• Water-based printing ink binders
• Grease-resistant paper coatings
• Zero-VOC paint binders
• Bio-based industrial adhesives
• Vapor barrier packaging films

Additional info

This technology is an acid-catalyzed, thermochemically processed biopolymer derived from soybean hulls. It features a water-soluble, PFAS-free, and zero-VOC hybrid structure of pectin, proteins, lignin, and cellulose. Exhibiting shear-thinning rheology and thermal stability up to 450°C (Tg of 116°C), it forms continuous, adhesive films. Applied to paper, it eliminates air permeability, enhances grease resistance to Kit #12, and increases tensile strength by 40%.