Polyol-treated antiblocking aid

DETAILED DESCRIPTION Compared with this, it is the object of the invention to provide an antiblocking agent with high antiblocking effect in which the aforementioned disadvantages of the state of the art as regards the adsorption of slip agent are avoided or markedly reduced, the release of the organic auxiliaries is optimized and the effectiveness of the silicon dioxide is improved.
It is a further object to provide a process for the production of this antiblocking agent without disadvantageous emissions into the environment at low production costs.
This object is achieved by using a composition based on silicon dioxide as antiblocking agent which is characterized in that it contains silicon dioxide having a particle size of 2 to 8 .
mu.
m (Coulter Counter), a specific surface of 150 to 850 m.
sup.
2 /g and a specific pore volume of 1.
4 to 2.
0 ml/g, which has been treated with polyol.
According to the invention, an antiblocking agent based on silicon dioxide is in particular also proposed, which is characterized in that it contains silicon dioxide having a particle size of 2 to 8 .
mu.
m, a specific surface of 150 to 850 m.
sup.
2 /g and a specific pore volume of 1.
4 to 2.
0 ml/g, which has ben treated with ethoxylated pentaerythritol in which the pentaerythritol/ethoxy ratio lies in the range from 1:0.
5 to 1:25.
Another subject of the invention is a process for the production of the antiblocking agent according to the invention which is characterized in that the silicon dioxide is micronized to a particle size of 2 to 8 .
mu.
m and treated with the polyol.