Coatings
Patent No. EP4249563 (titled "Coatings") was filed by Jotun on Sep 8, 2017. The application was issued on Nov 26, 2025.
Patent Summary
An ultra-high solids content anti-corrosive primer coating composition comprises 5.0–50 wt% bisphenol F epoxy resin, 2.0–10 wt% silane, 0–20 wt% hydrocarbon resin, 1.0–15 wt% reactive diluent, and at least one curing agent. The composition maintains a solids content of $\ge$90 wt% (ASTM D5201-05) and a viscosity of 200–800 mPa.s at 23°C and 50% RH (ASTM D4287). The ratio of active hydrogen equivalents in the curing agent to epoxy equivalents in the composition ranges from 50:100 to 120:100. Designed for airless spray application on substrates like ship ballast tanks, the formulation provides low VOCs, high flexibility to prevent brittleness, and extended recoating intervals. It is typically supplied as a two-part kit (components A and B) to ensure a commercially viable pot life.
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Dossier Documents
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Date
Description
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EP4249563
- Application Number
- EP23187104A
- Filing Date
- Sep 8, 2017
- Status
- Granted And Under Opposition
- Oct 24, 2025
- Publication Date
- Nov 26, 2025
- External Links
- Slate, Register , Google Patents