Hot melt rust retardant composite

A sprayable hot melt rust inhibitor composite characterized by being spray-coatable with heat and shear onto a metal substrate at a melt application temperature in the range of about 150.degree. C. to about 180.degree. C. under a hydraulic pressure in the range of about 1000 to about 1500 psi and the resultant coating capable of being heated to a temperature above its said application temperature without exhibiting an appreciable flow;

• said composite comprising (A) 100 parts by weight of a mixture comprised of (1) about 15 to about 30 weight percent of at least one sulfonate selected from calcium and magnesium sulfonates, (2) about zero to about 10 weight percent of at least one carbonate selected from calcium and magnesium carbonates, (3) about zero to about 8 weight percent of a semi-solid, oxidized petrolatum having a melting point in the range of about 45.degree. C. to about 60.degree. C. and oxidized with oxygen to an extent of about 35 percent to about 65 percent, and (4) about 60 to about 70 weight percent non-volatile diluent oil, (B) about 20 to about 60 parts by weight microcrystalline wax, (C) about 20 to about 40 parts by weight of a particulate filler having a particle size in the range of about 5 to about 40 microns selected from at least one of powdered aluminum basic lead silicochromate, zinc molybdate, strontium molybdate, zinc phosphate and strontium chromate, and (D) about 20 to about 60 parts by weight of at least one hydrocarbon derived thermoplastic resin having a softening point in the range of about 65.degree. C. to about 140.degree. C. and containing carbon-to-carbon unsaturation therein;
• wherein said hot melt composite is further characterized by having a viscosity in the range of about 4000 to about 15,000 centipoises (cps) at 125.degree. C. as determined by LVF Brookfield viscometer spindle No. 3 at 12 rpm and further characterized by a decreasing viscosity with increasing rate of shear.