Low VOC, aqueous dispersed acrylic epoxy microgels
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United States of America Patent
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Sep 10, 1996
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Mar 21, 1995
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May 25, 1994
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Abstract
An aqueous dispersed, very low VOC (less than about 0.4 pounds per gallon), protective surface coating composition comprises crosslinked microgel particles of less than 1 micron and produced by dispersing low molecular weight carboxyl functional addition copolymer into water, stably dispersing diepoxide epoxy resin in the aqueous dispersion, and coreacting the diepoxide resin with the carboxyl functional copolymer to provide epoxy-ester crosslinked microgel polymer particles stably dispersed into water. The microgel particles are useful as a polymeric binder for aqueous dispersed coatings particularly useful for coating interior surfaces of beer and beverage cans.
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