Elastically restoring polymer-modified bitumen (PmB)

US5091008A · kind A · utility

Assignee

• Rohm GmbH Chemische Fabrik · DE

Inventors

• Klaus Lehmann · Roßdorf, DE
• Michael Muller · Zwingenberg, DE

Key dates

• Filing date: May 31, 1990
• Grant date: Feb 25, 1992
• Expiry date: May 31, 2010

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L95/00
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A polymer-modified bitumen (PmB) having improved elastic restoration and having a content of 0.5-20 wt. % of polymer components which polymer components are comprised to the extent of at least 20 wt. % of polyalkyl (meth)acrylates having molecular weights greater than 30,000, said polyalkyl (meth)acrylate being comprised of 50-99.8 wt. % of alkyl (meth)acrylates having alkyl groups of 8-26 C atoms, 0.1-2.8 wt. % of polymerizable carboxylic acids, 0.1-2.8 wt. % of polymerizable basic nitrogen compounds; and 0-49.8 wt. % of one or more other polymerizable compounds each having not more than one polymerizable double bond.