Claims
- 1. Silanized, pyrogenically prepared silicic acids which are not dispersed in a solvent, produced by the process characterized in that the pyrogenically prepared silicic acids are placed in a mixer, and while being mixed the silicic acids are sprayed, optionally first with water and then with the compound (RO).sub.3 SiC.sub.n H.sub.2n+1, where n=from 10 to 18 and R stands for an alkyl, with the proviso that the compound is not stearyltrimethoxy-silane, and mixing is continued for from 15 to 30 minutes, and then temperature stabilization is done at a temperature of from 100.degree. to 160.degree. C. over a period of time from 1 to 3 h.
- 2. A process for preparing silanized, pyrogenically prepared silicic acids which are not dispersed in a solvent, characterized in that pyrogenically prepared silicic acids are placed in a mixer, and while being mixed the silicic acids are sprayed, optionally first with water and then with the compound (RO).sub.3 SiC.sub.n H.sub.2n+1, mixing is continued for from 15 to 30 minutes, and then temperature stabilization is done at a temperature of from 100.degree. to 160.degree. C. over a period of time from 1 to 3 h.
Priority Claims (1)
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44 02 370.7 |
Jan 1994 |
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Parent Case Info
This is a continuation of application Ser. No. 08/379,694, filed on Jan. 27, 1995, which was abandoned upon the filing hereof.
Foreign Referenced Citations (4)
Number |
Date |
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0216047 |
Apr 1987 |
EPX |
0475132 |
Mar 1992 |
EPX |
2107082 |
Aug 1971 |
DEX |
62-143908 |
Jun 1987 |
JPX |
Non-Patent Literature Citations (2)
Entry |
4029 World Surface Coatings Abstracts 64(1991) Jan., No. 583, Head. Hill Hall, GB, 91/00002. |
Meng-Jiao Wang and Siegfried Wolff, Filler-Elastomer Interactions . . . Silicas, pp. 715-735 no date avail. |
Continuations (1)
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379694 |
Jan 1995 |
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