METHOD OF PRODUCTION OF THE ADHESIVE COMPOSITION Russian patent published in 2007 - IPC C09J123/04 C08L23/08 

FIELD: chemical industry; metal working industry; methods of production of the adhesive composition used for deposition of the coatings on the metal surfaces.

SUBSTANCE: the invention is pertaining to the methods of production of the adhesive composition intended for deposition on the steel surface as the primer of the adhesive intermediate layer deposited on the steel surfaces under the polyolefin protecting coatings. The technical problem of the invention is the reduced duration of the contact of the adhesive composition melt with the surface of the metal at conservation of the high adhesive strength. The technical problem is being solved by that the method provides for the combined mixing of the ethylene copolymer and vinyl acetate or the combination of the copolymers of the ethylene and vinyl acetate differing in the contents of the vinyl acetate groups with polyisocyanate, caoutchouc and the filling agent. Premix the polyisocyanate containing of no less than two isocyanate groups with the filling agent consisting of the talcum or the mica in the conditions, when the polyisocyanate is in the liquid state, with the subsequent joint mixing of all the components. At that select the copolymer of ethylene and vinyl acetate with the contents of the vinyl acetate groups from 10 up to 45 %.

EFFECT: the invention ensures the reduced duration of the contact of the adhesive composition melt with the surface of the metal at conservation of the high adhesive strength.

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