Styronal® PX 7401X ap

Technical Information

Chemical nature

Aqueous, anionic dispersion of a co-polymer of carboxylated styrene and butadiene. This product does not con-tain any plasticizers or solvents.

Physical form: Milky white liquid

Ionic charge: anionic

Low-temperature stability: Not resistant to frost

Areas of application

Binder for coated paper and board.

Technical data

Solids content* 49 – 51 %

pH* 5.5 – 6.5 50 – 600 mPa·s

App.- viscosity*

Particle size approx. 0.15 µm

Tg approx. 10 °C 3

Density approx. 1.05 g/cm

*For detailed information please contact your local BASF representatives.

Applications

Styronal® PX 7401X ap is a binder for coating paper and board. Its properties are such that it can be used to coat paper and board that is printed by all conventional printing processes.

The pH of pigment slurries should be in the neutral-to-alkaline range before Styronal® PX 7401X ap is added. The dispersion should not be subjected to excessive shear, and care should be taken to avoid air being entrained.

We would recommend using rotary displacement pumps for coating colours prepared with Styronal® PX 7401X ap.

All pipelines and equipment used to prepare pigment slurries should be flushed thoroughly with cold water im-mediately after shutting down the coa-ter.

Paper coaters have to carry out their own trials when developing products that contain Styronal® PX 7401X ap.

Its compatibility with other ingredients, its stability during coating and its effect on the ability of coatings to adhere to different substrates, etc., are affected by a variety of factors which are too numerous for us to take into account in our own trials.

Storage:

The air in the headspace of bulk stor-age tanks must be kept saturated with water vapour at all times. This product must not be allowed to come into con-tact with bare iron or with copper and its alloys. Customers interested in pur-chasing this product in bulk should consult our leaflet on “The handling and storage of polymer dispersions”.