METHOD OF COATING APPLICATION ON CARRIER BODY Russian patent published in 2019 - IPC B05D7/22 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of applying a catalytic coating on a monolithic honeycomb element, in particular to a so-called flow-through monolithic support. Monolithic carriers of this kind can be coated with sufficient accuracy using a method of indirect coating by means of a displacer. Method of applying coatings from liquid media intended for this purpose onto substrates for production of catalytic neutralisers of exhaust gases, in particular for mechanical vehicles. Substrates are cylindrical carrier bodies and have two end surfaces (301), side surface (302), axial length L and multiple channels (310) extending from first end surface to second end surface. Method is implemented by means of cylinder (102) filled with liquid (103), having piston (101) and communicating with reservoir (112). In reservoir (112) there is displacer (111) such that when piston (101) moves, displacer (111) is driven by fluid (103) in proportion to it. Container (112) is connected with device (122) for application of coating on substrate. Dispenser (111) acts on liquid medium (113) for coating application, as a result of which there is proportional change of its level in device (122) for coating application. Displacement of piston (101), leading to reduction of displacer (111), is controlled from the condition that the rate of displacement of piston (101) does not exceed the limit value, thereby preventing formation of bubbles in the liquid composition of the coating from the porous oxide. Speed of piston movement (101), leading to reduction of displacer (111), is set in range from 0.01 to 3 m/s.

EFFECT: technical result of invention is higher uniformity of used for coating suspension without formation of bubbles, as well as reliability of applying coating on monolithic carriers in minimum time.

4 cl, 3 dwg