Environmentally-friendly processes to breakdown elastomers

Environmentally-friendly processes to
breakdown elastomers leading to
reusable telechelic oligomers with
controlled structures
CONTEXT
Our reference :
05717-01; 03489-01
Status des brevets
PCT priority patent
application
PCT/FR2010/050292
filed on February 19,
2010 and entitled
“Procédé de
préparation
d’oligomères
téléchéliques d’intérêt à
partir de déchets
pneumatiques”
French priority patent
application FR1361980
filed on December 3rd,
2013 and entitled
“Procédé de fabrication
d’oligomères
téléchéliques
fonctionnalisés”
The different methods that are currently used nowadays to recycle elastomers are known
to be expensive, constraining (high pressure and temperature requirements) and not
environmentally-friendly.
Among the different ways that are available, incineration is one the most widely used.
Other methods involve mechanical or even chemical transformations. Nevertheless, none
of these methods fully offers full satisfaction.
Among the available chemical transformation, one can cite the breakdowns of elastomers
into telechelic oligomers which can advantageously lead to various polymers.
However, in order to have a fully satisfying breakdown alternative, there is clearly a
demand for an efficient environmentally-friendly way to do so.
TECHNICAL DESCRIPTION
In the present work, the inventors have developed three ways to do the breakdown:
2010 patents – Organic solvent
2013 patents – Ionic liquid
Inventors
2010 patent
Faten SADAKA
Irène CAMPISTRON
Albert LAGUERRE
Jean-François PILARD
2013 patent
Jean-François PILARD
Arnaud NOURY
Isabelle DEZ
Annie-Claude
DEVELOPMENT STAGE
2010 patents-related process have been fully assessed on a laboratory scale with
natural rubber: polyisopropene (NR); as well as synthetic rubbers: polyisopropene
(IR), polybutadiene (BR), Styrene-butadiene (SBR), butadiene-acrylonitrile (NBR).
2013 patents-related process have been fully assessed on a laboratory scale with
natural rubber: polyisopropene (NR); and the following synthetic rubbers: SR,
SBR, NBR, and EPDM…
GAUMONT
Ali MOUAWIA
BENEFITS
The processes used in the present work are efficient, non expensive, non constraining
and environmentally-friendly. It also has the benefit of getting oligomers with a controlled
structure using three complementary methods.
Noticeably, the use of liquid ionic in the 2013 patents is clearly an advantage for the
breakdown of elastomers into high molar mass oligomers.
Status Commercial
INDUSTRIAL APPLICATIONS
Exclusive or nonexclusive license
The main application concerns the recycling of tires as well as other elastomer-based
products. On a second level, the resulting telechelic oligomers can be used in numerous
applications. For example, they can be used in bactericides, foams, rubber formulation
and anti-fouling coating.
Laboratoires
For further information, please contact us (Ref 05717-01 / 03489-01)
Institut des Molécules et
Matériaux du Mans
(IMMM, UMR6283), Le
Mans, France.
Laboratoire de Chimie
Moléculaire et
Thioorganique (LCMT,
UMR6507), Caen,
France.
Keywords :
Rubber Elastomer
Oligomers Telechelic
Metathesis Grubbs
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