COVER COMPOSITION, METHOD OF COATING COVER, COATED SUBSTRATE, PACKAGING MATERIAL AND PACKAGING FOR LIQUID Russian patent published in 2017 - IPC C09D129/04 B32B27/10 B65B3/00 C09D101/02 C09D103/00 C09D105/14 D21H23/46 

FIELD: chemistry.

SUBSTANCE: invention relates to a gas impermeable cover composition suitable for a water-borne coating, in particular relates to a method of applying a gas impermeable layer to a substrate using a coating composition, a coated substrate, a packaging material comprising coated cardboard, and a liquid package containing such a coating packing material. The composition comprises a polymer and a surfactant, the polymer is selected from polysaccharides or a mixture of polysaccharides and polyvinyl alcohol. The above-mentioned polysaccharides are soluble, dispersible or suspended in water, and the surfactant is a water-soluble non-ionic ethoxylated alcohol, the solids content of the composition being 4 to 20 wt % and the surfactant having the formula RO(CH₂CH₂O)_xH, wherein R is iso-C₁₃H₂₇ and x is 8 or more, or R is iso-C₁₀ and x is 5, 6, 7, 8, or 11.

EFFECT: obtaining a coating that is suitable for the food industry does not contain any toxic or harmful substances and which is safe to use.

24 cl, 8 dwg, 1 tbl, 7 ex