Method for preparing bitumen base

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 DEG C to 300 DEG C; b) introducing at least one chemical blowing additive into t...

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Bibliographic Details
Main Authors VINCENT REGIS, LAPALU LAURENCE
Format Patent
LanguageChinese
English
Published 05.09.2012
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
FUELS
LUBRICANTS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PEAT
PETROLEUM, GAS OR COKE INDUSTRIES
PYROLIGNEOUS ACID
TECHNICAL GASES CONTAINING CARBON MONOXIDE
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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Summary: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 DEG C to 300 DEG 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.
Bibliography:Application Number: CN200680026966