US 12,110,354 B2
Production method for aromatic vinyl-diene copolymer and production method for rubber composition
Kazuya Uenishi, Kanagawa (JP); Yu Shinke, Kanagawa (JP); Yoshihiro Kameda, Kanagawa (JP); Masaki Sato, Kanagawa (JP); Ayaki Kazariya, Kanagawa (JP); and Hideaki Sawa, Kanagawa (JP)
Assigned to The Yokohama Rubber Co., LTD., Tokyo (JP)
Appl. No. 17/271,097
Filed by The Yokohama Rubber Co., LTD., Tokyo (JP)
PCT Filed Aug. 22, 2019, PCT No. PCT/JP2019/032844
§ 371(c)(1), (2) Date Feb. 24, 2021,
PCT Pub. No. WO2020/040254, PCT Pub. Date Feb. 27, 2020.
Claims priority of application No. 2018-157042 (JP), filed on Aug. 24, 2018.
Prior Publication US 2021/0246246 A1, Aug. 12, 2021
Int. Cl. C08F 236/10 (2006.01); C08C 19/44 (2006.01); C08F 4/48 (2006.01); C08K 3/013 (2018.01); B60C 1/00 (2006.01)
CPC C08F 236/10 (2013.01) [C08C 19/44 (2013.01); C08F 4/48 (2013.01); C08K 3/013 (2018.01); B60C 1/0016 (2013.01); B60C 1/0025 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method of producing an aromatic vinyl-diene copolymer, the aromatic vinyl-diene copolymer being a copolymer of an aromatic vinyl and a diene, and
the aromatic vinyl-diene copolymer having a content of repeating units derived from an aromatic vinyl in an amount of 18 mass % or greater, and among repeating units derived from a diene, a proportion of a vinyl structure of 8 mol % or less, a proportion of a 1,4-trans structure of 60 mol % or less, and a proportion of a 1,4-cis structure from 40 to 95 mol %,
the method of producing the aromatic vinyl-diene copolymer comprising copolymerizing a monomer containing an aromatic vinyl and a diene using an initiator, the initiator being prepared with an organolithium compound, an alkylaluminum, a metal alcoholate, and at least one polar compound comprising water.