Coumarin-modified epoxy adhesives

Coumarin modification of epoxies provide for epoxy adhesives that fluoresce under short wave ultraviolet irradiation while remaining invisible under normal light. Furthermore, these modified epoxy adhesives can have increased adhesive bond strengths. In addition, photochemical curing of an epoxy mod...

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Bibliographische Detailangaben
Hauptverfasser:	Loy, Douglas A, Vandiver, Pamela B, McFadden, Peter, Frederick, Kevin M, Odegaard, Nancy N
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE ADHESIVES CHEMISTRY COMPOSITIONS BASED THEREON DYES LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES ORGANIC MACROMOLECULAR COMPOUNDS PAINTS POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS USE OF MATERIALS AS ADHESIVES
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Beschreibung
Zusammenfassung:	Coumarin modification of epoxies provide for epoxy adhesives that fluoresce under short wave ultraviolet irradiation while remaining invisible under normal light. Furthermore, these modified epoxy adhesives can have increased adhesive bond strengths. In addition, photochemical curing of an epoxy modified coumarin and a hardening agent with UV irradiation at certain wavelengths affords an epoxy adhesive composition. Further UV irradiation of the composition at certain wavelengths causes photoscission, which breaks the crosslinks that make the cured epoxy adhesive insoluble and intractable.