pH-sensitive microparticles with matrix-dispersed active agent
Methods to produce pH-sensitive microparticles that have an active agent dispersed in a polymer matrix have certain advantages over microcapsules with an active agent encapsulated in an interior compartment/core inside of a polymer wall. The current invention relates to pH-sensitive microparticles that have a corrosion-detecting or corrosion-inhibiting active agent or active agents dispersed within a polymer matrix of the microparticles. The pH-sensitive microparticles can be used in various coating compositions on metal objects for corrosion detecting and/or inhibiting.
The United States of America as Represented by the Administrator of the National Aeronautics and Space Administration
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Luz M. Scott T. Jerry W. Wenyan
Calle Jolley Buhrow Li