Sizing agent for carbon fiber, aqueous dispersion of the...

Stock material or miscellaneous articles – Self-sustaining carbon mass or layer with impregnant or...

Reexamination Certificate

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C428S375000, C428S413000, C525S524000, C252S008830

Reexamination Certificate

active

07150913

ABSTRACT:
A sizing agent for carbon fiber comprising either a component (A) and a component (B), or alternatively, a component (A′), a component (B′) and a component (D), each of which is described below. Component (A): an epoxy compound with at least 1 epoxy group within each molecule, and with a surface energy of 17 to 34 mJ/m2; component (B): an epoxy compound with at least 1 epoxy group within each molecule, and with a surface energy of at least 35 mJ/m2; component (A′): an epoxy compound with at least 2 epoxy groups within each molecule, and with a surface energy of 17 to 34 mJ/m2; component (B′): an epoxy compound with at least 2 epoxy groups within each molecule, and with a surface energy of at least 35 mJ/m2; and component (D): an anionic surfactant with an aryloxy group as a hydrophobic group, with an ammonium ion as a counter ion, and with an alkylene oxide addition quantity of no more than 10 moles.

REFERENCES:
patent: 3957716 (1976-05-01), Weldy
patent: 4167538 (1979-09-01), Taniguchi et al.
patent: 1454424 (1974-09-01), None
patent: 2109794 (1983-06-01), None
patent: 50-59589 (1975-05-01), None
patent: 56-076448 (1981-06-01), None
patent: 61-28074 (1986-02-01), None
patent: 63-230543 (1988-09-01), None
patent: 7-197381 (1995-08-01), None
patent: 2000-170050 (2000-06-01), None
patent: 2001-316980 (2001-11-01), None
Abstract of JP 56-076448, provided by the JPO website.
Abstract of JP 63-230543, provided by the JPO website.
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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