Method for preparing bitumen base

Details Method for preparing bitumen base Method for preparing bitumen base

2011-04-05

2011-04-05

Klemanski, Helene (Department: 1734)

Compositions: coating or plastic

Coating or plastic compositions

Bituminous material or tarry residue

C106S281100, C106S284400, C208S044000

Reexamination Certificate

active

07918930

ABSTRACT:
The invention concerns a method for preparing a bitumen base, including the following essential steps: a) introducing a bitumen in a container equipped with mixing means, and bringing the bitumen to a temperature of 120° C. to 300° C.; b) introducing at least one chemical blowing additive into the container, and mixing, said chemical blowing additive being of general formula Ar1-R—Ar2 (I) wherein Ar1 and Ar2 independently of each other represent a benzene ring or a system of condensed aromatic rings of 6 to 20 carbon atoms, substituted by at least one hydroxyl group, and R represents an optionally substituted divalent radical, whereof the main chain comprises 6 to 20 carbon atoms and at least one amide and/or ester group. The invention also concerns a bitumen base obtained by implementing said method, as well as the use of such bitumen bases in road surfacing and industrial applications.

REFERENCES:
patent: 4440886 (1984-04-01), Kraus
patent: 5326798 (1994-07-01), Danese
patent: 6949593 (2005-09-01), Heimerikx et al.
patent: 7247664 (2007-07-01), Heimerikx et al.
patent: 2002/0081924 (2002-06-01), Fensel et al.
patent: 2004/0014846 (2004-01-01), Heimerikx et al.
patent: 0 040 319 (1981-11-01), None
patent: 836543 (1960-06-01), None
patent: WO 02/26889 (2002-04-01), None

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