Airable has synthesized a replacement for the common reactive plasticizer diallyl phthalate (DAP). Diallyl phthalate is commonly applied as an additive in the production of unsaturated polyester resins, specifically fiberglass-reinforced composites. These composites are used in the manufacture of boats, pipes, and automotive parts. DAP may also be used as a crosslinker in rubber and PVC formulations to improve flexibility and durability. However, like most phthalates, DAPs are toxic to humans. Airable’s new chemical achieves the same allyl functionality without the hazards associated with the aromatic ortho diester associated with phthalates.
THE TECHNOLOGY
Airable’s soy diallyl ether (SDE) may be formulated as a polymer additive (at 1–5 phr) as a drop-in replacement for DAP. In sheet molding compounds, preliminary studies suggest that SDE has improved impact strength at 1–3 phr. SDE contains 54% biobased carbon.
THE BENEFITS
STATUS AND AVAILABILITY
This early-stage technology has shown promising results as a DAP replacement in sheet molding compounds. Performance evaluations are ongoing for other applications. Airable Research Lab filed a provisional patent in March 2023.
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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