| 摘要 |
The invention relates to an improved method for providing surface sheetings or coatings and to a stoving enamel for carrying out this method, the enamel being resistant to solvents and alkalis, wherein the improvement comprises that the stoving enamel, applied to a metal base, hardens after three to four days' exposure to air at about 20 DEG C so that the film does not swell under the action of water and cannot be removed by scratching, and wherein the said film is made by forming under simultaneous removal of the solvent from polyhydroxyl compounds, based on copolymers containing hydroxyl groups, copolymerized aromatic substances and polyisocyanates in solvents, without active hydrogen atoms.
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