Solid Lubricant Coatings Curable at 225 F-300 F
ARMY WEAPONS COMMAND ROCK ISLAND IL GENERAL THOMAS J RODMAN LAB
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Experimental solid-film lubricant coatings based on urea- formaldehyde, epoxy-polyamide, epoxy-silane, alkyd-urea, melamine-acrylic, and epoxy-urea resins were formulated for use on the M16-A1 rifle. These coatings are cured after being applied to the rifle, and thus low temperatures are needed so as not to adversely affect the rifles strength. None of these coatings when cured at temperatures of 225-300F had antiwear or corrosion preventing properties comparable to the fully cured MIL-L-46010A type of solid lubricant coating now used. Of the experimental formulations tested, those based on the urea-formaldehyde and epoxy-silane resins gave the best results. However, with the addition of a curing agent, boron trifluoride monoethylamine complex, to a qualified MIL-L-46010A base, the product could be cured at 275F, and all test requirements could be satisfied.
- Coatings, Colorants and Finishes
- Lubricants and Hydraulic Fluids