Patent ID: 9376560
Filing Date: 2016-06-28
CPC Classification: C08G,C08L

Claim Text:
1. A matrix material for a carbon fiber-reinforced composite comprising a matrix resin containing both a first epoxy resin and a second epoxy resin, wherein: the first epoxy resin contains a polyfunctional glycidylamine-type epoxy resin having four epoxy groups in one molecule and has an epoxy equivalent weight of 21 to 74 g/equivalent; the second epoxy resin contains both a p-aminophenol-type epoxy resin having three epoxy groups in one molecule, and a tetramethylbiphenol-type solid epoxy resin having two epoxy groups in one molecule, or contains only the tetramethylbiphenol-type solid epoxy resin, and the second epoxy resin has an average epoxy equivalent weight of 32 to 142 g/equivalent; and the matrix resin has an average epoxy equivalent weight of 99 to 163 g/equivalent, which is calculated using a following equation (A): the average epoxy equivalent weight of the second epoxy resin is calculated using a following equation (B):