Sizes based on ketene dimers
First Claim
1. Aqueous sizes based on ketene dimers, which contain(a) ketene dimers of the formula ##STR3## in which R1 and R2 are 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 in an amount of 0.2 to 0.7 mol of reactive functional group per 1000 parts by weight of ketene dimer said hydrophobic compound (s) being selected from the group consisting of acid halides which are derived from fatty acids having 12 to 30 carbon atoms or isocyanates, which contain hydrocarbon radicals having 14 to 36 carbon atoms.
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Abstract
New aqueous sizes, in particular paper sizes, are made available which contain
(a) ketene dimers of the formula ##STR1## 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.
19 Citations
8 Claims
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1. Aqueous sizes based on ketene dimers, which contain
(a) ketene dimers of the formula ##STR3## in which R1 and R2 are 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 in an amount of 0.2 to 0.7 mol of reactive functional group per 1000 parts by weight of ketene dimer said hydrophobic compound (s) being selected from the group consisting of acid halides which are derived from fatty acids having 12 to 30 carbon atoms or isocyanates, which contain hydrocarbon radicals having 14 to 36 carbon atoms.
Specification