Patent ID: 8133832

Claim:
Supported catalyst system for polymerization of olefins, comprising: a support made of fibers or a fleece of fibers, wherein the mean fiber diameter is less than 1000 nm and the mean fiber length is more than 200,000 nm, the support comprising a transition metal compound, at least one organometallic compound supported on the fiber support, the organometallic compound being selected from organometallic compounds of formula I: M 1 (R 11 ) r (R 12 ) s (R 13 ) t (I) where M 1 is an element of a main group of the Periodic Table of the Elements, R 11 is hydrogen, C 1 -C 10 -alkyl, C 6 -C 15 -aryl, halo-C 1 -C 10 -alkyl, halo-C 6 -C 15 -aryl, C 7 -C 40 -arylalkyl, C 7 -C 40 -alkylaryl, C 1 -C 10 -alkoxy or halo-C 7 -C 40 -alkylaryl, halo-C 7 -C 40 -arylalkyl or halo-C 1 -C 10 -alkoxy, R 12 and R 13 are each hydrogen, halogen, C 1 -C 10 -alkyl, C 6 -C 15 -aryl, halo-C 1 -C 10 -alkyl, halo-C 6 -C 15 -aryl, C 7 -C 40 -arylalkyl, C 7 -C 40 -alkylaryl, C 1 -C 10 -alkoxy or halo-C 7 -C 40 -alkylaryl, halo-C 7 -C 40 -arylalkyl or halo-C 1 -C 10 -alkoxy, r is an integer from 1 to 3 and s and t are integers from 0 to 2, with the sum r+s+t corresponding to the valence of M 1 , or aluminoxane compounds of formula II or III: where R 21 -R 24 are each, independently of one another, a C 1 -C 6 -alkyl group.