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
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Authors
Dates
2017-08-02—Published
2012-10-30—Filed