ANTICORROSION PROTECTIVE POLYMER COATING AND METHOD OF ITS APPLICATION ONTO SURFACE OF STEEL CASE OF SMALL ARMS CARTRIDGES Russian patent published in 2012 - IPC C09D183/04 C09D5/08 C23C22/12 C23C28/00 F42B5/295 

FIELD: weapons and ammunition.

SUBSTANCE: invention may be used in machine building, also in other industries, in production of consumer goods and cultural and household goods. The anticorrosion protective coating for a steel case surface in cartridges of small arms contains a zinc-phosphate layer, a polymer layer in the form of a polymer-polymer complex on the basis of a polyorganosiloxane polymer and a butadiene copolymer with styrene, a modifying additive, containing 60-70% solution in the mixture of ethyl glycol acetate and butanol of epoxyaminorubber adduct, modified with melaminoformaldehyde resin K-421 -02, formic acid, epoxide-alkyd resin E-30, distilled water. The invention also relates to the method of applying an anticorrosion protective coating, including serial formation of a zinc-phosphate layer, application of a polymer layer by means of cases treatment in an aqueous solution of the specified polymer-polymer complex, curing, at the same time cases are treated at one stage in a screw apparatus without intermediate drying after wet-on-wet phosphatising or at two stages at separate equipment with intermediate drying after phosphatising, at the same time when the process is carried out at one or two stages to remove an excessive layer of polymer composition and moisture, to reduce contamination of equipment, separation operation is carried out with modification of polymer composition curing modes.

EFFECT: increased stability of working solution of polymer composition with a modifying additive during operation and storage, achievement of compatibility of a polymer base with a modifying additive, reduced upper limit of temperature during drying operation, reduced power inputs during technological process, reduced economic costs, development of a protective coating, with improved physical-mechanical parameters.

5 cl, 1 tbl