Sizing agent for carbon fiber, aqueous dispersion thereof,...

Details Sizing agent for carbon fiber, aqueous dispersion thereof,... Sizing agent for carbon fiber, aqueous dispersion thereof,...

2006-08-22

2006-08-22

Feely, Michael J. (Department: 1712)

Stock material or miscellaneous articles

Self-sustaining carbon mass or layer with impregnant or...

C428S413000, C523S400000, C523S402000, C252S008830

Reexamination Certificate

active

07094468

ABSTRACT:
The present invention provides a sizing agent capable of imparting superior resin impregnation and adhesion with resin, and more particularly, a carbon fiber sizing agent that have satisfactory emulsification stability having stable process throughput and minimizes the changes over time in the sized carbon fibers. The carbon fiber sizing agent contains (A) a compound having at least one epoxy group per molecule, (B) an anionic surfactant having an ammonium ion as the counter ion, and (C) a nonionic surfactant wherein, the nonionic surfactant (C) is contained at 1/50 to ½ (weight ratio) relative to the anionic surfactant (B).

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U.S. Appl. No. 10/478,473, filed Nov. 21, 2003, Sugiura, et al.
U.S. Appl. No. 10/484,493, filed Jan. 22, 2004, Sugiura, et al.

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