The Soy-PK reactive oligomer cross-linker resin (Soy-PK) offers a practical, cost-effective drop-in replacement for epoxy resins containing bisphenol-A (BPA). Such resins are widely used in coatings, especially in metal beverage and food container coatings that present serious mutagenicity and health concerns. The new technology offers a viable option to displace fossil-based BPA-containing epoxy resins with a renewable source raw material, improving the industry’s environmental footprint.
Resin and coating manufacturers have attempted to replace BPA-containing epoxy coatings. Various chemistries have been tried and failed in one or more functional requirements: flexibility, adhesion, application, corrosion resistance, or hydrolysis under low pH. In addition, these alternates are often costly.
Recognizing a need, Airable Research Lab teamed with Battelle to develop bio-derived reactive oligomer resins for use in coating applications. The resulting technology uses oil from soybeans and other crops as chemical feedstocks. The product has the functionality, molecular weight, and rheological properties to perform equivalent to epoxy-, phenolic-, and polyester-based coatings. Using electrochemical impedance spectroscopy (EIS), researchers evaluated Soy-PK’s corrosion resistance and
found that it outperformed commercial BPA alternative coatings (see graph). In addition, Soy-PK cures at a speed comparable with current industrial coatings and therefore requires no additional processing equipment.
Soy-PK has potential applications to myriad industrial and specialty coatings that are currently BPA-based resin. The resin can also be used in phenolic- and acrylic-based coating formulations and applications.
THE BENEFITS
Presents no health or toxicity hazards
Formulates easily with traditional coating solvents
Shows excellent adhesion, flexibility, and corrosion resistance
Provides enhanced cure kinetics
Forms stable bonds during cross-linking
Affords an excellent pot life
Costs less than $1 per pound
Serves as a drop-in replacement for BPA-based resins
Current development status
Commercially available technologies
Desired business relationship
Technology selling
Technology development
New technology applications
Adaptation of technology to other markets
GREEN PRODUCTS CAPITALIZE ON A CRITICAL MARKET TREND
Growing sustainability concerns have prompted advocacy for stricter chemical regulations, and both evolving policy and consumer preference have stimulated market shifts toward bio-based raw materials. Soybeans have broad applications across both consumer and industrial spheres, often providing benefits in terms of cost, function, and sustainability.
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