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US 5,494,949 AGranted
Surface-modified oxide particles and their use as fillers and modifying agents in polymer materials
AssigneesMerck Patent GmbH, Hoechst Aktiengesellschaft
InventorsJoachim Kinkel, Kurt Marquard, Ludwig Pohl
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Abstract
The invention relates to oxide particles which have a surface modification by covalently bonded organic groups which allow covalent bonding into polymer materials. These particles are particularly advantageous in their use as fillers or modifying agents in polymer materials, in particular polymer films.
Claims14
Oxide particles which have a surface modification by covalently bonded organic groups, obtained by treating spherical, non-porous oxidic primary particles obtained by hydrolytic polycondensation of alcoholate compounds with a silanizing agent of the formula I
- [R.sup.1 R.sup.2 R.sup.3 ]Si--(CH.sub.2).sub.1 --X--R.sup.4(I)
- wherein
- R.sup.1 is C1 or alkoxy having 1-6 C atoms,
- R.sup.2 and R.sup.3 are alkyl having 1-6 C atoms or have the meaning of R.sup.1,
- 1is a number from 1 to 6,
- X is a single bond, O, NH, or CONH NHCONH,
- R.sup.4 is ##STR4## where Y=CH, ##STR5## 2 Z =OR or two radicals Z together are
- --O--or >NR
- and m and n are numbers from 0 to 6.
6 more elements
Dependencies are inferred from the claim text.