Color indicator for completion of polymerization for thermosets
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United States of America Patent
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Jan 25, 2000
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app pub date -
Jan 29, 1998
filing date -
Jan 29, 1998
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Abstract
An indicator for complete polymerization and cure of base-catalyzed epoxy thermoset resin systems is disclosed. In particular, the present invention makes use of an diazo dye having amino groups which forms a salt or complex with hardeners used in various epoxy resin systems. Upon full polymerization and consumption of the hardener, a chromophoric shift of the dye can be observed.
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