Quick cure carbon fiber reinforced epoxy resin

Details Quick cure carbon fiber reinforced epoxy resin Quick cure carbon fiber reinforced epoxy resin

2006-02-28

2006-02-28

Buttner, David J. (Department: 1712)

Stock material or miscellaneous articles

Composite

Of epoxy ether

C528S119000, C528S120000, C528S121000, C528S327000, C528S363000, C528S365000, C523S427000, C523S428000, C523S466000, C523S468000, C525S404000

Reexamination Certificate

active

07005185

ABSTRACT:
An epoxy composition includes an epoxy resin, a latent curing agent, and a catalyst. The composition includes two epoxide groups per molecule, and the latent curing agent is preferably a dicyanopolyamide, and most preferably dicyandiamide. The catalyst includes 2,4-toluene bis dimethyl urea, preferably in a concentration exceeding 70% by weight. The composition can be used in prepregs. The relative concentrations of the epoxy resin, curing agent, and catalyst are selected to achieve desired properties, including specific curing times and temperatures, and glass transition temperatures that enable a cured resin composition to be removed from a mold after being heated to its curing temperature, without being cooled. Exemplary formulations have reduced cure times, at both high and low curing temperatures, as compared to prior art formulations.

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Product Data Sheet for EPIKOTE 828 resin, Sep. 2002.
Product Information, D.E.N. 438, Oct. 2001.

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