Patent · US Expired

Process for the preparation of a high molecular weight olefin polymer

US5374752A · kind A · utility

58Cited by

5References

4Claims

0Family size

Assignee

Hoechst GmbH · DE

Inventors

Andreas Winter · Königstein, DE
Jurgen Rohrmann · Kelkheim, DE
Volker Dolle · Kelkheim, DE
Frank Kuber · Oberursel, DE

Key dates

Filing date	Apr 25, 1994
Grant date	Dec 20, 1994
Priority date	—
Expiry date	Apr 25, 2014

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S526/943
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A very active catalyst system for olefin polymerization comprises a cocatalyst, preferably an aluminoxane, and a metallocene of the formula I ##STR1## in which, preferably, M.sup.1 is Zr or Hf, R.sup.1 and R.sup.2 are alkyl or halogen, R.sup.3 is hydrogen, R.sup.4 to R.sup.6 and alkyl or aryl, --(CR.sup.8 R.sup.9).sub.m --R.sup.7 --(CR.sup.8 R.sup.9).sub.n is a single- or multi-membered chain, in which R' can also be a (substituted) hetero atom, and m+n is zero or 1.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.