Patent · US Expired

Polymer-modified bitumen (PMB)

US5085701A · kind A · utility

8Cited by

2References

6Claims

0Family size

Assignee

Rohm GmbH Chemische Fabrik · DE

Inventors

Michael Muller · Zwingenberg, DE
Horst Pennewiss · Darmstadt, DE
Juergen Gebhardt · Schaafheim, DE

Key dates

Filing date	Jun 1, 1990
Grant date	Feb 4, 1992
Priority date	—
Expiry date	Jun 1, 2010

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC08L95/00
WIPO fieldMacromolecular chemistry, polymers
WIPO sectorChemistry

Abstract

A polymer-modified bitumen (PmB) having improved elastic restoration prepared by blending from 0.5-20 wt. % of a polymer material in bitumen, said polymer additive, which may be comprised of various polymers, being comprised of from 20-100 wt. % of a polyalkyl (meth)acrylate comprising monomer units as follows: PA1 50-100 wt. % of alkyl (meth)acrylates containing alkyl groups of 8-26 C atoms; PA1 0-30 wt. % of alkyl (meth)acrylates containing alkyl groups of 1-7 C atoms; and PA1 0-20 wt. % of other monomers, optionally containing functional groups; and said polymer having a molecular weight Mw>1,000,000, corresponding to a viscosity number .eta..sub.sp /c>120 ml/g as measured in chloroform at 20.degree. C.

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