導電性ロール

Japanese Patent JP3869022

B2

A conductive roll to be used as a developing roll, a charging roll, a transfer roll or the like in an electrophotographic apparatus such as a copying machine, a printer or a facsimile, of the present invention comprises a base rubber layer formed on a peripheral surface of a shaft, an intermediate layer formed on a peripheral surface of the base rubber layer, and a surface layer formed on a peripheral surface of the intermediate layer, the surface layer being composed of a resin composition comprising: (A) a silicone-grafted acrylic polymer which comprises repeating units represented by the following general formula (1), wherein an acrylic polymer portion of the silicone-grafted acrylic polymer exclusive of a structural portion derived from a siloxane has a glass-transition temperature of -35 to 30 DEG C: $(wherein\; Y\; is\; a\; structural\; portion\; derived\; from\; an\; acrylic\; monomer;\; Z\; is\; a\; structural\; portion\; derived\; from\; the\; acrylic\; monomer,\; which\; has\; a\; graft\; portion\; derived\; from\; a\; siloxane;\; k\; is\; a\; positive\; number\; of\; 1\; to\; 3,000;\; and\; n\; is\; a\; positive\; number\; of\; 1\; to\; 3,000);\; and\; (B)\; an\; isocyanate\; curing\; agent.\; According\; to\; the\; present\; invention,\; the\; use\; of\; the\; component\; (B)\; enhances\; the\; cross-linking\; of\; the\; silicone-component\; (B)\; enhances\; the\; cross-linking\; of\; the\; silicone-grafted\; acrylic\; polymer\; (A),\; and\; thus\; the\; surface\; layer\; of\; the\; conductive\; roll\; has\; an\; appropriately\; cross-linked\; state,\; so\; that\; the\; conductive\; roll\; can\; be\; obtained\; which\; is\; superior\; both\; in\; smear\; resistance\; and\; in\; toner\; filming\; resistance.\mathop{\mathrm{image}}$

Hitoshi Yoshikawa
Shoji Arimura
Akihiko Kachi
Kenichi Oho

JP52597299A

January 17, 2007

November 10, 1998

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Tokai Rubber Industry Co., Ltd.

B29D99/00; B32B25/08; C08G18/62; C08L75/04; F16C13/00; G03G15/02; G03G15/08; G03G15/16

JP11267583A

Masahiko Nishito

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