EP 1448647 A2 20040825 - METHOD OF PREPARING BLOCK COPOLYMERS FOR TYRE TREAD COMPOSITIONS AND THE COPOLYMERS THUS PREPARED
Title (en)
METHOD OF PREPARING BLOCK COPOLYMERS FOR TYRE TREAD COMPOSITIONS AND THE COPOLYMERS THUS PREPARED
Title (de)
VERFAHREN ZUR HERSTELLUNG VON BLOCKCOPOLYMEREN FÜR REIFENPROFILZUSAMMENSETZUNGEN
Title (fr)
PROCEDE DE PREPARATION DE COPOLYMERES A BLOCS POUR COMPOSITIONS DE BANDE DE ROULEMENT DE PNEUMATIQUE
Publication
Application
Priority
- EP 0212205 W 20021031
- FR 0114417 A 20011031
Abstract (en)
[origin: WO03037946A2] The invention relates to: a method of preparing a two-block copolymer which can be used in a sulphur-crosslinkable rubber composition having reduced hysterises in the crosslinked state; one such block copolymer in which one of the blocks comprises a polyisoprene and the other block comprises a diene elastomer other than polyisoprene; and said rubber composition which is intended for tyre treads. The inventive method of preparing said copolymer consists in copolymerising one or more monomers comprising a conjugated diene other than isoprene using a catalytic system containing: at least one hydrocarbon solvent; a compound A of a metal from group IIIA; a compound B of an alkaline-earth metal; and a polymer initiator C comprising a bond C-Li which is formed by a monolithiated polyisoprene that is intended to form said polyisoprene block, the number-average molecular weight Mn1 of said polyisoprene block having a value of between 2 500 and 20 000 g/mol. In this way, said method can be used to obtain the aforementioned copolymer in which the other block comprising the diene elastomer has a number-average molecular weight Mn2 of between 65 000 and 350 000 g/mol and a 1,4-trans chaining content that is equal to or greater than 70 %.
IPC 1-7
C08F 297/02; C08F 297/04; C08L 53/00; C08L 53/02; C08F 36/04; B60C 1/00
IPC 8 full level
B60C 1/00 (2006.01); C08F 4/54 (2006.01); C08F 297/00 (2006.01); C08F 297/02 (2006.01); C08F 297/04 (2006.01); C08L 53/00 (2006.01); C08L 53/02 (2006.01)
CPC (source: EP US)
C08F 297/02 (2013.01 - EP US); C08F 297/046 (2013.01 - EP US); C08L 53/00 (2013.01 - EP US); C08L 53/02 (2013.01 - EP US); Y10S 152/905 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR IE IT LI LU MC NL PT SE SK TR
DOCDB simple family (publication)
WO 03037946 A2 20030508; WO 03037946 A3 20030925; CN 100516103 C 20090722; CN 1578796 A 20050209; EP 1448647 A2 20040825; JP 2005507441 A 20050317; JP 5160016 B2 20130313; RU 2004116333 A 20051010; RU 2289596 C2 20061220; US 2004260002 A1 20041223; US 7205360 B2 20070417
DOCDB simple family (application)
EP 0212205 W 20021031; CN 02821705 A 20021031; EP 02783065 A 20021031; JP 2003540226 A 20021031; RU 2004116333 A 20021031; US 83540904 A 20040430