Printability of paper
AssigneeBASF SE
InventorsWerner Auhorn, Hans-Juergen Degen, Lothar Hoehr, Ulrich Riebeling
Life of this patent
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Abstract
The printability of paper is improved by applying an aqueous coating agent consisting of (a) 100 parts by weight of a finely divided pigment, (b) from 5 to 70 parts by weight, based on solids, of a cationic aqueous polymer dispersion of a paper size and (c) from 0.01 to 10 parts by weight of a surfactant which interferes with the formation of the surface size and/or of a polymeric dispersant in an amount of from 0.5 to 4 g/m.sup.2 to one or both surfaces of the paper and drying the coated paper.
Claims10
A process for improving the printability of paper, wherein an aqueous coating agent consisting of
- (a) 100 parts by weight of a finely divided pigment,
- (b) from 5 to 70 parts by weight, based on polymer, of a cationic aqueous polymer dispersion of a paper size whose polymer has a glass transition temperature of from 5.degree. to 80.degree. C. and
- (c) from 0.01 to 10 parts by weight of a surfactant which interferes with the formation of the surface size and/or of a polymeric dispersant
- is applied in an amount of from 0.5 to 4 g/m.sup.2 to one or both surfaces of the paper and the coated paper is dried.
Dependencies are inferred from the claim text.