Stock material or miscellaneous articles – Composite – Of epoxy ether
Patent
1996-02-21
1997-09-30
Krass, Frederick
Stock material or miscellaneous articles
Composite
Of epoxy ether
528 92, 528 94, 528407, 525523, 525423, 523466, 523468, C08G 5940, C08G 5970
Patent
active
056724314
ABSTRACT:
The present invention provides a curable epoxy resin composition, which includes an epoxy resin; from 10 to 60 percent by weight of the epoxy resin of an amine curing agent; from 0.1 to 5 percent by weight of the epoxy resin of an imidazole accelerator; and from 0.01 to 5 percent by mole of the epoxy resin of chromium acetylacetonate (Cr(acac).sub.3). The resultant cured epoxy resin prepared from the epoxy resin composition of the present invention demonstrates improved fracture toughness. Also, the interlaminar fracture energy of the resultant graphite/epoxy laminate prepared from the cured epoxy resin of the present invention is greater than that of the conventional graphite/epoxy laminate.
REFERENCES:
patent: 3755253 (1973-08-01), Rice
patent: 4510277 (1985-04-01), St. Clair et al.
Lin, et al., "Imidazole and Chromium Acetylacetonate as Additives for the Cure and Fracture Toughness of Epoxy Resins and Their Composites", Polymer Composites, Aug. 1995, vol. 16, No. 4, pp. 269-275.
Krass Frederick
National Science Council
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