Process for the preparation of an olefin polymer

Details Process for the preparation of an olefin polymer Process for the preparation of an olefin polymer

1995-06-05

1998-12-22

Nazario-Gonzalez, Porfirio

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526160, 526351, 526161, 526352, 526943, 502103, 502117, 502152, 556 11, 556 12, 556 43, 556 53, 556 54, C08F 464, C07F 1700

Patent

active

058521429

ABSTRACT:
The invention relates to a process for the preparation of a compound of the formula IV or IVa ##STR1## in which R.sup.1 -R.sup.5 are preferably hydrogen or alkyl, which comprises reacting a compound I ##STR2## with a compound II ##STR3## in which X.sup.1 and X.sup.2 are preferably halogen, to give the corresponding indanones, which are converted into the compounds IV and IVa by reduction and dehydration. The compounds IV and IVa are important intermediate products for the preparation of chiral metallocene complexes which are suitable catalyst components for olefin polymerization.

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