Color indicator for completion of polymerization for thermosets

Details Color indicator for completion of polymerization for thermosets Color indicator for completion of polymerization for thermosets

1998-01-29

2000-01-25

Gulakowski, Randy

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

156 64, 156330, 503209, 524789, 524790, 525524, 525533, C08L 6300, B41M 520

Patent

active

06017983&

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.

REFERENCES:
patent: 5314859 (1994-05-01), Takahashi et al.
patent: 5384303 (1995-01-01), Mishimura et al.
patent: 5425824 (1995-06-01), Marwick
patent: 5476884 (1995-12-01), Kayaba et al.

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