US 11,987,671 B2
Elastomer mix comprising PLLA and PDLA
Nathalie Coste, Clermont-Ferrand (FR); Lise Maisonneuve, Clermont-Ferrand (FR); Gilles Mioche, Clermont-Ferrand (FR); Severin Dronet, Clermont-Ferrand (FR); Julien Cayuela, Saint-Saulve (FR); Bertrand De Backer, Mons (BE); and Philippe Ghislain Dubois, Ciplet (BE)
Assigned to COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
Appl. No. 17/251,544
Filed by COMPAGNIE GENERALE DES ETABLISSEMENTS MICHELIN, Clermont-Ferrand (FR)
PCT Filed Jun. 18, 2019, PCT No. PCT/FR2019/051477
§ 371(c)(1), (2) Date Dec. 11, 2020,
PCT Pub. No. WO2019/243724, PCT Pub. Date Dec. 26, 2019.
Claims priority of application No. 1855392 (FR), filed on Jun. 19, 2018.
Prior Publication US 2021/0253801 A1, Aug. 19, 2021
Int. Cl. C08G 81/02 (2006.01); B60C 1/00 (2006.01); C08G 63/08 (2006.01); C08L 9/00 (2006.01); C08L 9/06 (2006.01); C08L 53/00 (2006.01); C08L 67/04 (2006.01); C08L 87/00 (2006.01)
CPC C08G 81/027 (2013.01) [B60C 1/0016 (2013.01); C08G 63/08 (2013.01); C08L 9/06 (2013.01); C08L 9/00 (2013.01); C08L 53/00 (2013.01); C08L 67/04 (2013.01); C08L 87/005 (2013.01); C08L 2205/025 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An elastomeric mixture comprising at least:
polymer A comprising at least one diene elastomer/polylactide copolymer A1, the copolymer A1 comprising:
a diene elastomer block having a number-average molar mass Mn of greater than 25 000 g/mol and a polylactide block PLLA or PDLA, and optionally one or more other polylactide blocks which are all PLLA when the polylactide block is PLLA or which are all PDLA when the polylactide block is PDLA, the mass percentage of polylactide blocks in copolymer A1 being between 10% and 50% by weight, relative to a weight of the copolymer A1; and
polymer B comprising:
a diene elastomer block having a number-average molar mass Mn of greater than 25 000 g/mol and a diene elastomer/polylactide copolymer B1, the copolymer B1 comprising another polylactide block, which is PLLA when, in the copolymer A1, the polylactide block is PDLA, or which is PDLA when, in the copolymer A1, the polylactide block is PLLA, and optionally one or more other polylactide blocks which are all PLLA when the another polylactide block is PLLA or which are all PDLA when the another polylactide block is PDLA, the mass percentage of polylactide blocks in copolymer B1 being between 10% and 50% by weight, relative to the weight of the copolymer B1, or
a polylactide B2 which is PLLA when, in the copolymer A1, the first polylactide block is PDLA, or which is PDLA when, in the copolymer A1, the first polylactide block is PLLA, or
a mixture of copolymer B1 and polylactide B2,
wherein PLLA and PDLA denote a chain consisting of units of formula (I)
—[CH(CH3)—C(O)—O]—  (I)
 of which at least 70% by weight are, respectively, of L and D configuration.