| 摘要 |
The invention relates to a process for manufacturing a paper equipped with a barrier layer or a cardboard equipped with a barrier layer, which comprises coating of a paper or a cardboard with an aqueous coating material. The aqueous coating material comprises an aqueous dispersion of a polymer P, which is obtainable by radically initiated aqueous emulsion polymerization of at least 75 parts of an acrylate ester, which is methyl acrylate, ethyl acrylate, methyl methacrylate or ethyl methacrylate, and optionally other monomers, wherein the sum total of the parts by weight of all monomers is 100, in the presence of 10 to 85 parts of ligninsulfonic acid. The obtained paper or cardboard equipped with a barrier layer shows beneficial water vapor permeability. |
