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US 12,686,776 B2Granted
Intumescent compositions producing and relying upon low density carbon foams
AssigneeCase Western Reserve University
InventorsErik Price, Gary Wnek, James Covello
Life of this patent
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Abstract
An intumescent composition based upon modifications to tannic acid (TA), including certain additives, is contemplated. Such compositions may be incorporated in epoxy and other resin-based coatings. The resulting composition produces a novel, lightweight, and extremely effective intumescent char having a density of 1.5 to 4.0 mg/cm3.
Claims13
An intumescent coating composition comprising:
- a curable binder comprising an epoxy resin and an amine curing agent;
- a blowing agent provided at between 12 to 22 wt. % of the composition;
- an acid source provided at between 12 to 22 wt. % of the composition;
- and
- tannic acid provided at between 10 to 50 wt. % of the composition;
- wherein the epoxy resin is provided at between 10 to 30 wt. % of the composition;
- wherein the amine curing agent is provided at between 5 to 22 wt. % of the composition;
- and
- wherein the composition, when burned with a flame after cure, produces a char having a density of between 1.5 and 4.0 mg/cm3.
6 more elements
Dependencies are inferred from the claim text.