Patent · US Expired

Method for (CO)polymerizing polar and non-polar monomers

US6599996B1 · kind B1 · utility

2Cited by

4References

7Claims

0Family size

Assignee

BASF SE

Inventors

Michael Geprags · Schwarzheide, DE
Joachim Queisser · Mannheim, DE
Jun Okuda · Samukawa, JP
Kai Carsten Hultzsch · Wiesbaden, DE
Klaus Beckerle · Bodenheim, DE

Key dates

Filing date	May 23, 2002
Grant date	Jul 29, 2003
Priority date	—
Expiry date	May 23, 2022

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F12/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

In a process for the transition-metal-catalyzed preparation of polymers having a syndiotactic or predominantly syndiotactic structure from vinylaromatic monomers and a process for preparing block copolymers from vinylaromatic monomers and olefinically unsaturated polar monomers, use is made of transition metal compounds of the formula (I) where the substituents and indices have the following meanings:M is scandium, yttrium, lanthanum or a lanthanide metal,R′″ is &mgr;-C3-C20-alkyl,L is a low molecular weight organic compound having Lewis basicity, where n=1 or 0 and at least one n in (I) is 0,m is 1 or 2.

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