Inorganic fiber having modified surface and its use for reinforcement of resins.

摘要

Inorganic fiber such as carbon fiber is modified by a surface treatment with a dinitrodiamine compound represented by the formula of <CHEM> wherein X is a divalent aliphatic, alicyclic or aromatic group which may contain halogen or oxygen in the group, R<1> is hydrogen, an aliphatic group, an alicyclic group or an aromatic group, with the proviso that two nitrogen atoms linking through X may further link through R<1> when both X and R<1> are the aliphatic groups, and R<2> and R<3> independently of one another are each hydrogen or an alkyl of 1 to 12 carbon atoms, with the proviso that R<2> and R<3> may conjointly form a ring. The inorganic fiber thus modified is useful for reinforcement of resins.