FIELD: chemistry.
SUBSTANCE: invention relates to polyvinyl sulphonic acid, which is used as high-molecular weight dopant, a method of producing polyvinyl sulphonic acid, a composite, versions of a dispersion, versions of a method of producing a dispersion and versions of an electroconductive layer. The polyvinyl sulphonic acid includes vinyl sulphonic acid links of formula: 
(1), where R1, R2 and R3, Z are a hydrogen atom. The molar amount of sulphonic acid groups formed by monomeric vinyl sulphonic acid relative to the total molar amount of monomer links is 50.0 to 98.0 mol %. The polyvinyl sulphonic acid has optical density of 0.1 to 2.0 (aqueous solution, 0.2 wt %, cell length 10 mm) in the wavelength range of 255 to 800 nm. The method of producing polyvinyl sulphonic acid includes polymerisation of monomeric vinyl sulphonic acid of general formula: 
(1'), where R1, R2 and R3, Z are a hydrogen atom. The obtained polyvinyl sulphonic acid is then heated at temperature in the range of 90°C to 120°C for 0.5 to 500 hours. The composite includes said polyvinyl sulphonic acid and electroconductive polymer. The method of producing dispersion includes dissolving and/or dispersing said polyvinyl sulphonic acid in a solvent. The monomer is then polymerised to obtain an electroconductive polymer in the solvent in which a polyanion - polyvinyl sulphonic acid - is dissolved and/or dispersed. The dispersion forms an electroconductive layer which includes poly(3,4-ethylenedioxythiophene) and a polyanion - polyvinyl sulphonic acid. When measuring by X-ray diffraction, the ratio of the area of peaks between peak K, where the angle 2θ ranges from 8° to 10°, and peak L, where angle 2θ ranges from 24° to 28° (area of peak K/area of peak L) ranges from 1.0 to 10.0.
EFFECT: invention increases stability of the dispersion and enables to obtain an electroconductive layer with high electroconductivity and improved physical properties.
15 cl, 2 dwg, 3 tbl, 48 ex
