Antistatic Agent SAS-93

Hostastat HS 1 in PVC

Hostastat HS 1 is widely used as an internal antistatic agent for PVC. For this application Hostastat HS 1 FF is preferred. Since Hostastat HS 1 causes hazing of transparent polymers in the usual quantities of 1.0 phr* to 1.5 phr, its main use is in the manufacture of opaque PVC calendered films. Fig. 2 shows the antistatic effect of Hostastat HS 1 in PVC depending on

For antistatic modification of thick-walled extruded and injection moulded articles made from rigid PVC, internal antistatic agents are less effective in the usual amounts (< 2 phr). We recommend either the external application of Hostastat HS 1 pills as a solution or the incorporation of 2-3 phr Hostastat HS 1 to achieve sufficient antistatic effects.

In plasticized PVC, Hostastat HS 1 is used in amounts of 1 phr to 2 phr. Hazing occurs at concentrations higher than 0.3 phr.

In order to produce transparent rigid PVC articles, the addition of Hostastat HS 1 should not exceed 0.3 phr. A combination of 0.3 phr Hostastat HS 1 with 1.0 phr Hostastat FE 20 has proved successful to maintain transparency (cfr. fig. 4).

Hostastat HS 1 in styrenic polymers

Hostastat HS 1 in PE-LD

Hostastat HS 1 is also suitable for antistatic modification of polyolefins, particularly polyethylene (PE-LD). Additionally it improves the flow of the polymer melt during processing. Hostastat HS 1 is generally added in amounts of 1-2 phr.

In contrast to the applications described above, in which Hostastat HS 1 is used in polymers with a high glass transition temperature (PVC, PS, ABS), in antistatic-modified polyethylene articles the antistatic agent is able to migrate continuously to the surface over a long period of time and provides therefore a long-lasting antistatic effect.

Figs. 14 and 15 show the effect of Hostastat HS 1 in PE-LD.

Hostastat HS 1 in engineering plastics

Apart from the polymers described before, Hostastat HS 1 also shows antistatic effects in engineering plastics, such as:

TPU

Usual addition rates in TPU range from 1-2 phr, where in most cases 1 phr provides sufficient antistatic properties in TPU.