Internal sizing composition for paper

Details Internal sizing composition for paper Internal sizing composition for paper

1998-03-03

1999-10-05

Brunsman, David

Compositions: coating or plastic

Coating or plastic compositions

Carbohydrate or derivative containing

C08L 302, C08L 304, C08L 310

Patent

active

059617080

ABSTRACT:
The present invention relates to a size composition of improving the water repellency of paper in papermaking by virtue of adding prior to web formation to the pulp slurry such a sizing dispersion that contains at least a ketene dimer compound as a hydrophobic sizing agent, and further contains colloidal starch in an amount which is at least 150% by weight of the hydrophobic sizing agent. The invention is particularly applicable for improving the water repellency of paper containing calcium carbonate as the filler.

REFERENCES:
patent: 4606773 (1986-08-01), Novak
patent: 4614546 (1986-09-01), Schroer et al.
patent: 4861376 (1989-08-01), Edwards et al.
patent: 5658378 (1997-08-01), Tsai et al.

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