TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The solvent comprises greater than or equal to 75 wt.%.Preferred Component: The solvent comprises a high boiling temperature solvent from diethyleneglycol dibutylether and a mixture of high boiling aromatics, ketones, and esters. The polar and non-polar solvent components comprise at least one of toluene, ethyl acetate, isopropanol or diethyleneglycol dibutylether.    TECHNOLOGY FOCUS - POLYMERS - Preferred Component: The polymeric film comprises polypropylene and the heat-fusible polymeric particles comprise polyethylene having a m.pt. of 113degreesC. The adhesion promoter comprises a modified polyolefin having pendant hydroxyl functional groups, pendant carboxylic functional groups, or pendant chlorinated functional groups. It also comprises a tackifying resin.Preferred Composition: The coating comprises 2-10 wt.% cross-linked adhesive and 0.2-2, preferably 0.5-2 wt.% adhesion promoter. The heat-fusible particles comprise 15-20 wt.% thermally sensitive coating solution. The adhesive comprises 1-3 wt.% thermally sensitive coating solution. The cross-linked adhesive comprises 2-10 wt.%.Preferred Property: The m.pt. of the heat-fusible polymeric particles is less than 120, preferably 105degreesC.Preferred Method: The coated porous material is heated to promote crosslinking of the adhesive. EXAMPLE - A separator coating solution was prepared from (wt.%) POLYWAX 1000 (RTM: heat-fusible material) (17.2), GELVA 2480 (RTM: adhesive) (1.8), UNISTOLE P401 (RTM: adhesion promoter) (0.9), toluene (55.3), ethyl acetate (17.2), isopropanol (3.8), and diethyleneglycol dibutylether (3.8). It was utilized to coat porous materials by dip-coating each porous material in the solution at room temperature and withdrawing at 20 ft/minute. The coated separator was dried at 60degreesC in hot air. To promote cross-linking of the adhesive, the dried, coated separator was baked for 24 hours at 60degreesC. Cells were assembled comprising the various cured, coated separators by placing a section, approximately 1.5 cm2, in a sealed conductivity cell filled with 3.5 ml of 1 M LiTFS (sic) propylene carbonate/methoxyethylether (1:1 ratio by volume). The conductivity cell was constructed of gold plated steel with 1.5 cm2 circular gold plated polished steel electrodes and Teflon (RTM: polytetrafluoroethylene) coated insulators. The cell was hermetically sealed following assembly.