Microcapsules having dual reagents for forming a self-healing material separated by the capsule wall and methods for making same
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United States of America Patent
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Jul 2, 2019
Grant Date -
Feb 21, 2019
app pub date -
Oct 24, 2018
filing date -
Jul 11, 2016
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Abstract
Rupturable, dual reagent mono-capsules are disclosed that have a core composition, which includes a carboxylic acid, encapsulated within a phenolic resin-containing polymer wall that ruptures upon exposure to alkaline conditions over a period of time, and a shell connected to an exterior surface of the polymer wall by a surfactant. The shell is made from a mineral containing a metal that is chemically bonded to the surfactant by a chemical electrostatic interaction. Upon rupture of the polymer wall of the mono-capsule, the carboxylic acid and the mineral containing the metal chemically react with one another to form a reaction product that seals a rupture in the capsule and/or seals a feature of a surface upon which the capsules are disposed.
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