Modified polymers with a high proportion of cis-position double bonds

US6759497B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Michael Grun · Siegburg, DE
• Thomas Knauf · Dormagen, DE
• Wilfried Braubach · Solingen, DE

Key dates

• Filing date: Apr 18, 2002
• Grant date: Jul 6, 2004
• Expiry date: Jul 16, 2022

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08C19/26
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

The present invention relates to polymers that are modified along the polymer chain and are based on conjugated dienes or conjugated dienes and vinyl-aromatic compounds having a content of vinyl-aromatic compounds of up to 60 wt. %, a content of cis-position double bonds of ≧92%, a mean molecular weight of 50,000 to 1,500,000 g/mole and a gel content of ≦5%. The polymers according to the invention can be used for the production of all types of molded articles, wherein in particular their technical and physical properties are improved compared with the prior art.