Fluoroelastomer-containing non-tacky electrically conductive coating composition

Claim 1

A fluoroelastomer-containing non-tacky electrically conductive coating composition which comprises (a) a fluoroelastomer selected from highly fluorinated elastic copolymers, (b) a fluororesin selected from the group consisting of polytetrafluoroethylene; copolymers of tetrafluoroethylene and at least one other ethylenically unsaturated monomer selected from the group consisting of olefines, haloolefines and perfluoro(alkyl vinyl ethers); polychlorotrifluoroethylene; and polyvinylidene fluorides, (c) a coupling agent selected from the group consisting of a silane coupling agent of the formula: R.sup.1 SiR.sup.2.sub.3-a R.sup.3.sub.a (I) wherein R 1 is alkyl having at least one substituent selected from the group consisting of chlorine, amino, aminoalkyl, ureido, glicydoxy, epoxycyclohexyl, acryloyloxy, methacryloyloxy, mercapto and vinyl, or vinyl; R 2 and R 3 are each chlorine, hydroxy, C 1 -C 10 alkoxy, C 2 -C 15 alkoxy substituted alkoxy, C 2 -C 4 hydroxyalkyloxy, or C 2 -C 15 acyloxy; and a is 0, 1 or 2; a coupling agent of the formula: T(OR).sub.4 (II) wherein T is titanium, zirconium, hafnium or thorium; and R is alkyl, cycloalkyl or aryl, or its derivatives which is derived by reacting the orthoacid ester (II) and at least one compound having at least one functional group; SnCl 4 ; aluminum isopropylate, mono-sec-butoxyaluminum diiopropylate, aluminum sec-butylate, ethylacetoacetatealuminum diisopropylate and aluminum tris(ethylacetate); and magnesium alcholoates; (d) an electrically conducting material selected from the group consisting of carbon, graphite, gold, silver, copper, aluminum, titanium and anionic, monionic, cationic and amphoteric antistatic agents and (e) a liquid vehicle, wherein the weight ratio of the fluoroelastomer (a) and the fluororesin (b) is from 95:5 to 35:65, the weight ratio of the coupling agent (c) to the fluoroelastomer (a) is from 1:100 to 50:100, and the electrically conducting material is contained in such an amount that a coating film made from the composition has 10 8 ohm-cm or less of the volume resistivity.