EP 3087105 A1 20161102 - METHOD FOR CONTROLLED METATHESIS DEPOLYMERIZATION OF SYNTHETIC RUBBER IN A SOLUTION
Title (en)
METHOD FOR CONTROLLED METATHESIS DEPOLYMERIZATION OF SYNTHETIC RUBBER IN A SOLUTION
Title (de)
VERFAHREN ZUR KONTROLLIERTEN METATHESEN-DEPOLYMERISATION VON SYNTHETISCHEM KAUTSCHUK IN EINER LÖSUNG
Title (fr)
PROCÉDÉ DE DÉPOLYMÉRISATION CONTRÔLÉE D'UN CAOUTCHOUC SYNTHÉTIQUE EN SOLUTION PAR MÉTATHÈSE
Publication
Application
Priority
- FR 1363393 A 20131223
- EP 2014079082 W 20141222
Abstract (en)
[origin: WO2015097192A1] The invention relates to a method for the depolymerization of a block copolymer comprising a polyisoprene block and at least one polybutadiene block for the preparation of a modified polyisoprene mainly comprising the species functionalized on the at least one polybutadiene block by one or more functional groups, wherein said method comprises the following steps: i) a step of preparing a block copolymer solution comprising the block copolymer and one or more organic solvents, then ii) a step of adding, to the block copolymer solution, one or more transfer agents comprising said functional group or groups, iii) a step of adding, to the block copolymer solution, one or more metathesis catalysts exhibiting higher activity on disubstituted carbon-carbon double bonds than on tri- and tetra-substituted carbon-carbon double bonds. The invention also relates to a modified polyisoprene obtainable using the aforementioned method. Lastly, the invention relates to an elastomeric composition made from the aforementioned modified polyisoprene.
IPC 8 full level
B60C 1/00 (2006.01); C08C 19/08 (2006.01); C08L 53/00 (2006.01)
CPC (source: EP)
B60C 1/00 (2013.01); C08C 19/08 (2013.01); C08L 53/005 (2013.01); C08C 2019/09 (2013.01)
Citation (search report)
See references of WO 2015097192A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
FR 3015487 A1 20150626; FR 3015487 B1 20160129; EP 3087105 A1 20161102; WO 2015097192 A1 20150702
DOCDB simple family (application)
FR 1363393 A 20131223; EP 14825152 A 20141222; EP 2014079082 W 20141222