Member for developing electrostatic latent images

Abstract

A member for developing electrostatic latent images to visible images is disclosed, which comprises a support, a first coating layer comprising an elastic material formed on the support, and a second coating layer comprising a flexible resin formed on the first coating layer.

What is claimed is:  
     
       1. A member for developing electrostatic latent images to visible images, comprising a support, a first coating layer comprising an elastic material formed on said support, and a second coating layer comprising an electroconductive material and a flexible resin having a elongation ratio of 10% to 500% formed on said first coating layer, said flexible resin being a resin prepared by cross-linking a fluorine-containing polymer comprising a fluoro-olefin and a hydroxyl-group containing vinyl ether through a polyfunctional isocyanante isocyanate, wherein said first and second coating layers have a volume resistivity of 10 6  to 10 11  Ω-cm, and wherein said elastic material of said first coating layer comprises as a base material a material selected from the group consisting of nitrile rubber, epichlorohydrin rubber, urethane rubber, silicone rubber, and mixtures thereof. 
     
     
       2. The member for developing electrostatic latent images as claimed in claim  1 , wherein said electroconductive material is carbon black. 
     
     
       3. The member for developing electrostatic latent images as claimed in claim  1 , wherein said fluorine-contained copolymer contains 25 wt % to 32 wt. % of fluorine, and has a specific gravity of 1.4 to 1.5, an OH value of 40 to 150 mgKOH/g-resin, an acid value of 0 to 30 mgKOH/g-resin, a number-average molecular weight of 0.4×10 4  to 10×10 4 , a weight-average molecular weight of 0.8×10 4  to 20×10 4 , a glass transition temperature of 0° C. to 70° C., a heat decomposition starting temperature of 240° C. to 250° C., and a solubility parameter of 8 to 9. 
     
     
       4. The member for developing electrostatic latent images as claimed in claim  1 , wherein said second coating layer has a thickness of 5 μm to 70 μm.