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1. WO2020002460 - METHOD FOR PRODUCING A GRAFTED RUBBER AND TIRE COMPRISING THE GRAFTED RUBBER

Publication Number WO/2020/002460
Publication Date 02.01.2020
International Application No. PCT/EP2019/067061
International Filing Date 26.06.2019
IPC
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
81
Macromolecular compounds obtained by interreacting polymers in the absence of monomers, e.g. block polymers
02
at least one of the polymers being obtained by reactions involving only carbon-to-carbon unsaturated bonds
B PERFORMING OPERATIONS; TRANSPORTING
60
VEHICLES IN GENERAL
C
VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
1
Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
C CHEMISTRY; METALLURGY
07
ORGANIC CHEMISTRY
C
ACYCLIC OR CARBOCYCLIC COMPOUNDS
329
Thiocarbonic acids; Halides, esters or anhydrides thereof
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C
TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
19
Chemical modification of rubber
20
Incorporating sulfur atoms into the molecule
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
C
TREATMENT OR CHEMICAL MODIFICATION OF RUBBERS
19
Chemical modification of rubber
22
Incorporating nitrogen atoms into the molecule
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
8
Chemical modification by after-treatment
04
Reduction, e.g. hydrogenation
C08G 81/02 (2006.01)
B60C 1/00 (2006.01)
C07C 329/00 (2006.01)
C08C 19/20 (2006.01)
C08C 19/22 (2006.01)
C08F 8/04 (2006.01)
CPC
B60C 1/0016
C07C 329/00
C08C 19/20
C08C 19/22
C08F 8/04
C08G 81/022
Applicants
  • APOLLO TYRES GLOBAL R&D B.V. [NL/NL]; Colosseum 2 7521 PT Enschede, NL
Inventors
  • VERWEY, Lehani; NL
  • VANCSO, Gyula Julius; NL
  • REUVEKAMP, Louis; NL
  • SCHULTZ, Steven M.; NL
Agents
  • MICHALSKI HÜTTERMANN & PARTNER PATENTANWÄLTE MBB; Speditionstraße 21 40221 Düsseldorf, DE
Priority Data
LU10086829.06.2018LU
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) METHOD FOR PRODUCING A GRAFTED RUBBER AND TIRE COMPRISING THE GRAFTED RUBBER
(FR) PROCÉDÉ DE PRODUCTION D'UN CAOUTCHOUC GREFFÉ ET PNEU COMPRENANT LE CAOUTCHOUC GREFFÉ
Abstract
(EN)
The present invention relates to a method for producing a grafted rubber, the method comprising the steps of: A) providing a rubber comprising at least one olefinic carbon-carbon-double bond, B) providing a polymer being capable of exhibiting lower critical solution temperature (LCST) properties and comprising a terminal functional thiol group capable of reacting with the olefinic carbon-carbon double bond of the rubber, wherein the polymer is obtained by the steps of: B1) reversible addition-fragmentation chain transfer (RAFT) polymerization of a monomer comprising at least one olefinic carbon-carbon-double bond in the presence of a thiocarbonylthio RAFT agent thereby forming a polymer comprising a terminal thiocarbonylthio group, and B2) cleaving the terminal thiocarbonylthio group to a thiol group thereby attaining the terminal thiol functionality of the polymer, and C) reacting the polymer with the rubber by a radical thiol-ene reaction thereby forming a grafted rubber, the grafted rubber comprising a backbone derived from the rubber and sidechains derived from the polymer. The polymer in a further step B3) is treated with a reducing agent before being used in the grafting reaction of step C).
(FR)
La présente invention concerne un procédé de production d'un caoutchouc greffé, le procédé comprenant les étapes consistant : A) à fournir un caoutchouc comprenant au moins une double liaison carbone-carbone oléfinique, B) à fournir un polymère apte à présenter des propriétés de température de solution critique inférieure (LCST) et comprenant un groupe thiol fonctionnel terminal apte à réagir avec la double liaison carbone-carbone oléfinique du caoutchouc, le polymère étant obtenu par les étapes de : B1) polymérisation par transfert de chaîne réversible par addition-fragmentation (RAFT) d'un monomère comprenant au moins une double liaison carbone-carbone oléfinique en présence d'un agent de RAFT thiocarbonylthio formant ainsi un polymère comprenant un groupe thiocarbonylthio terminal, et B2) clivage du groupe thiocarbonylthio terminal en un groupe thiol, ce qui permet d'obtenir la fonctionnalité thiol terminale du polymère, et C) réaction du polymère avec le caoutchouc par une réaction thiol-ène radicalaire, formant ainsi un caoutchouc greffé, le caoutchouc greffé comprenant un squelette dérivé du caoutchouc et des chaînes latérales dérivées du polymère. Le polymère dans une étape supplémentaire B3) est traité par un agent réducteur avant d'être utilisé dans la réaction de greffage de l'étape C).
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