Process of dispersing electro-conductive carbon black and web product made thereby
AssigneeLudlow Corporation
InventorAdrien W. Allard
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Abstract
Novel process for dispersing electroconductive carbon black to make novel conductive web products and the dispersions produced therewith. The process comprises dispersing said carbon black in an aqueous media using tris (2,3 dibromopropyl) phosphate, or the like, as a dispersing agent and then coating a porous fibrous substrate with the resulting carbon black dispersion.
Claims4
An electroconductive sheet formed of a permeable non-woven fibrous web comprising a maximum surface electroresistivity of about 200,000 ohms per square and carrying electroconductive an carbon black coating on the surfaces of the fibers from which said sheet is formed, said sheet being formed by a process comprising the steps of
- (1) dispersing said conductive carbon black in a latex binder using an effective quantity of a dispersing agent selected from a chlorinated organic dispersing agents and an organic phosphate dispersing agents,
- (2) impregnating the resulting dispersion of carbon black into said web and coating the surface of said fibers with said dispersion, and
- (3) drying residual water from the surface of the fibers, leaving a thin coating of carbon block dispersed on the surfaces of said fibers.
Dependencies are inferred from the claim text.