FIELD: manufacturing technology.
SUBSTANCE: invention relates to coating for polymer insulating material and method for production thereof. Such coatings can be applied both on three-dimensional parts, and on sheet materials such as films and woven materials. Coating contains from 1 to 10 layers and is silica, wherein coating contains main silicate structural unit with organic residues, due to which it can be applied on flexible substrates. Thickness of individual layer in coating varies from 0.1 to 100 mcm, individual layers are obtained by wet chemical method from precursors, which are silane, siloxane and/or silicate, wherein organic residues content inside coating varies from layer to layer, so that inorganic fragments content of Si-0 inside coating increases to outside, i.e. according to distance from substrate.
EFFECT: technical result consists in obtaining coatings with improved resistance to corona discharge.
8 cl, 1 ex
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