The present invention provides an oil-resistant agent which is capable of imparting paper with excellent oil resistance and water resistance. The present invention discloses an oil-resistant agent for paper, which contains a non-fluorine copolymer that has a repeating unit formed from (a) an acrylic monomer having a long-chain hydrocarbon group with 7-40 carbon atoms and a repeating unit formed from (b) an acrylic monomer having a hydrophilic group. This oil-resistant agent for paper also contains a liquid medium that is composed of water and/or an organic solvent, preferably of water or a mixture (aqueous medium) of water and an organic solvent. It is preferable that the non-fluorine copolymer has a repeating unit formed from (c) a monomer having an ion donor group in addition to the repeating units formed from the monomers (a) and (b).
本发明提供了一种耐油剂,它能够赋予纸张优异的耐油性和耐
水性。本发明公开了一种纸张耐油剂,它含有一种无
氟共聚物,该共聚物的重复单元由(a)具有 7-40 个碳原子的长链烃基的
丙烯酸单体和(b)具有亲
水基团的
丙烯酸单体组成。这种纸张防油剂还含有一种液体介质,该介质由
水和/或有机溶剂组成,最好是
水或
水与有机溶剂的混合物(
水介质)。无
氟共聚物除了由单体(a)和(b)形成的重复单元外,最好还具有由(c)单体形成的重复单元,该单体具有离子供体基团。