Patent · US Expired

Method for polymerizing conjugated diolefins (dienes) with catalysts based on cobalt compounds in the presence of vinylaromatic solvents

US6310151A · kind A · utility

2Cited by

5References

8Claims

0Family size

Assignee

BAYER HEALTHCARE LLC · DE

Inventors

Heike Windisch · Leverkusen, DE
Werner Obrecht · Moers, DE
Gisbert Michels · Leverkusen, DE
Norbert Steinhauser · Monheim, DE

Key dates

Filing date	Jan 12, 2001
Grant date	Oct 30, 2001
Priority date	—
Expiry date	Jan 12, 2021

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08F36/04
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

Conjugated diolefins, optionally in combination with other unsaturated compounds which may be copolymerized with the diolefins, are polymerized by performing the polymerization of the diolefins in the presence of catalysts based on cobalt compounds, organoaluminum compounds and modifiers in the presence of aromatic vinyl compounds at temperatures of -30.degree. C. to +80.degree. C. By means of the process according to the invention, it is possible straightforwardly to produce solutions of polydiolefins, such as polybutadiene, having different 1,2 unit contents in aromatic vinyl compounds, which solutions may then, for example, be further processed to yield ABS or HIPS.

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