US 12,168,708 B2
Functional diene elastomer and rubber composition
Emma Moreso, Clermont-Ferrand (FR); Kahina Mammeri, Clermont-Ferrand (FR); and Anne-Frédérique Salit, Clermont-Ferrand (FR)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/292,279
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Nov. 7, 2019, PCT No. PCT/FR2019/052647
§ 371(c)(1), (2) Date May 7, 2021,
PCT Pub. No. WO2020/094993, PCT Pub. Date May 14, 2020.
Claims priority of application No. 1860355 (FR), filed on Nov. 9, 2018.
Prior Publication US 2021/0403627 A1, Dec. 30, 2021
Int. Cl. C08F 279/02 (2006.01); B60C 1/00 (2006.01); C08F 236/06 (2006.01); C08K 3/04 (2006.01); C08K 3/36 (2006.01)
CPC C08F 279/02 (2013.01) [B60C 1/00 (2013.01); C08F 236/06 (2013.01); C08K 3/04 (2013.01); C08K 3/36 (2013.01)] 14 Claims
 
1. A diene elastomer bearing pendant imidazole functions in a molar content of at least 0.05 to 4 mol % of the constituent repeating units of the diene elastomer, wherein the diene elastomer is a copolymer of ethylene and of 1,3-butadiene which contains units of formula (I) or formula (II)

OG Complex Work Unit Chemistry
the ethylene units representing at least 50 mol % of the constituent repeating units of the diene elastomer, and wherein the pendant imidazole functions are of formula (III)

OG Complex Work Unit Chemistry
in which the symbols Y1, Y2, Y3 and Y4, which may be identical or different, represent a hydrogen or a substituent, and one of the symbols Y1, Y2, Y3 and Y4 denotes an attachment to a diene unit which is one of a plurality of diene units of the diene elastomer, a portion of the diene units of the diene elastomer are modified by grafting a modifying agent which contains a group that is reactive with respect to carbon-carbon double bonds and a group of formula (IV)

OG Complex Work Unit Chemistry
in which the symbols Z1, Z2, Z3 and Z4, which may be identical or different, represent a hydrogen atom or a substituent, and at least one of the symbols Z1, Z2, Z3 and Z4 denotes an attachment to the reactive group.