ELECTROCONDUCTIVE COATING COMPOSITION AND METHOD OF MAKING SOLID ELECTROCONDUCTIVE COATINGS Russian patent published in 2012 - IPC C09D133/04 C09D133/10 C09D133/26 C09D5/24 C08K3/04 C08K3/18 

FIELD: chemistry.

SUBSTANCE: electroconductive composition contains the following in wt %: film-forming copolymer 13.0-45.0; graphite powder 15.5-20.0; technical carbon powder (soot) 7.5-40.0; carbonyl iron powder 3.0-4.0; organic solvent - the balance. Graphite powder is used with particle size of 10-30 mcm and technical carbon and carbonyl iron powder is used with particle size of not more than 0.1 times the maximum size of the graphite powder particles. Described is a method of making electroconductive coatings, which involves depositing a dispersed liquid polymerisable electroconductive composition onto a substrate, forming a solid electroconductive coating by depositing several layers of the composition onto the substrate. The final thickness of the electroconductive coating must be at least 10 times greater than the maximum particle size of the graphite. Intermediate drying of each layer is carried out at room temperature at pressure lower than atmospheric pressure, in an alternating electromagnetic field before the process of hardening the outer surface of the layer. Final drying of all layers of the electroconductive coating is carried out at polymerisation temperature of the electroconductive composition binder before the end of polymerisation of all layers of the electroconductive coating.

EFFECT: obtaining a solid film-type electroconductive coating with small spread of values of electrical resistance of coating samples made in the same batch.

8 cl, 2 dwg, 2 tbl, 3 ex