| abstract |
1. Sprayable gas-tight coating composition containing a polymer and a surfactant, in which the polymer is selected from the group consisting of polyvinyl alcohol and polysaccharides or mixtures thereof, the aforementioned polysaccharides being soluble, dispersible or suspended in water, and a surfactant represents a water-soluble non-ionic ethoxylated alcohol, characterized in that the solids content in the composition is from 4 to 20%, and a surfactant has the formula RO (CHCHO) H, in which: R is iso-CH, and x is 8 or more; or R is iso-C, and x is 5, 6, 7, 8, or 11.2. A coating composition according to claim 1, characterized in that the surfactant is selected from Lutensol ON50, Lutensol ON70 and Lutensol TO8.3. The coating composition of claim 1 or 2 is a mixture of a polysaccharide and polyvinyl alcohol (PVOH). 4. The coating composition according to any one of paragraphs. 1 and 2, characterized in that the polysaccharides contain starch, starch derivatives, microfiber cellulose (MFC) and hemicellulose. 5. A coating composition according to claim 4, characterized in that the polymer contains polyvinyl alcohol mixed with starch and / or a starch derivative and / or MFC and / or hemicellulose. A coating composition according to claim 4, characterized in that the polymer contains only starch, or only a starch derivative, or a mixture thereof, or one of them mixed with MFC and / or hemicellulose. A coating composition according to claim 4, characterized in that the polymer contains only MFC or only hemicellulose, or a mixture thereof. The coating composition according to any one of paragraphs. 1 and 2, characterized in that it contains non-ionic ethoxyls |