Aqueous coating compositions comprising a prolamin
Prolamin protein-based coatings address the environmental concerns of polymer microplastics by offering biodegradable and safe alternatives with comparable performance to traditional coatings, maintaining stability and flexibility.
WO2026147728A1PCT designated stage Publication Date: 2026-07-09MICHELMAN INC
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- MICHELMAN INC
- Filing Date
- 2025-12-18
- Publication Date
- 2026-07-09
AI Technical Summary
Technical Problem
Existing polymer coatings used on seeds and other substrates are not biodegradable and form microplastics, leading to environmental concerns and regulatory restrictions, while high-pH and solvent-based formulations pose safety and environmental issues.
Method used
Development of coating compositions using prolamin proteins, such as zein, formulated at neutral pH with minimal organic solvent content, providing robust and biodegradable coatings with synthetic polymer-like properties.
Benefits of technology
The coatings exhibit superior performance to traditional polymer coatings, being microplastic-free, biodegradable, and safe, with stable adherence and lubricity, while maintaining formulation flexibility and operational advantages.
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Smart Images
Figure US2025060395_09072026_PF_FP_ABST
Abstract
Coatings may be used as barriers to protect seeds and other substrates from moisture and dust, as well as to enhance lubricity. Compositions suitable for coating seeds and other substrates may comprise an aqueous fluid containing about 10 vol% or less organic solvent and having a pH of about 6 to about 8, a prolamin protein dissolved or emulsified in the aqueous fluid, and a stabilizer, wherein the prolamin protein is present in the aqueous fluid at about 40 wt% or above, based upon a combined mass of the prolamin protein and the stabilizer. The stabilizer may comprise at least one member selected from the group consisting of a bio-sourced stabilizer, a polymeric stabilizer, and any combination thereof that is dissolved or emulsified in the aqueous fluid. Optionally, the aqueous coatings may comprise at least one surfactant, biocide, preservative, plasticizer, wax, or any combination thereof.
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