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US 2003/0082385 A1Published application
Quick cure carbon fiber reinforced epoxy resin
AssigneeToray Composites (America), Inc.
InventorsWei (Helen) Li, Kishio Miwa
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AssigneeToray Composites (America), Inc.
InventorsWei (Helen) Li, Kishio Miwa
Estimating the term…
An epoxy composition including an epoxy resin, a latent amine curing agent, and a specific catalyst. Preferably, the epoxy resin includes two epoxide groups per molecule, and the latent amine curing agent is a dicyanopolyamide, most preferably, dicyandiamide. The specific catalyst is preferably 2,4-toluene bis dimethyl urea. A prepreg employing the epoxy composition of the present invention can achieve a 95% cure in about one half of the time required by a prepreg that differs only in the catalyst employed. Furthermore, prepregs employing the epoxy composition of the present invention have glass transition temperatures higher than the curing temperatures when cured at a temperature range from about 80° C. to about 150° C., enabling cured prepregs to be removed from molds without being cooled. Use of the prepregs of the present invention thus enables composite component manufacturers to substantially increase production rates without requiring the use of additional molds.
A resin matrix composition comprising:
A resin matrix composition comprising:
A prepreg comprising:
A prepreg comprising:
A method to enable a thermosetting epoxy resin formulation to rapidly reach a 95% cure, said method comprising the steps of:
Dependencies are inferred from the claim text.