| abstract |
New aqueous sizes, in particular paper sizes, are made available which contain (a) ketene dimers of the formula <IMAGE> (I) in which R1 and R2 can be identical or different and represent hydrocarbon radicals having 6 to 30 carbon atoms, (b) amine-modified starch, (c) hydrophobic compound(s) which contain(s) one or more functional groups which are reactive towards OH groups within a pH range of 2 to 6, and (d) if desired further auxiliaries. |