US 12,269,904 B2
Sulfur-modified chloroprene rubber and method for producing same, sulfur-modified chloroprene rubber composition, vulcanizate, and molded article
Atsunori Kondo, Tokyo (JP); and Takashi Sunada, Tokyo (JP)
Assigned to DENKA COMPANY LIMITED, Tokyo (JP)
Appl. No. 17/609,987
Filed by Denka Company Limited, Tokyo (JP)
PCT Filed May 8, 2020, PCT No. PCT/JP2020/018742
§ 371(c)(1), (2) Date Nov. 9, 2021,
PCT Pub. No. WO2020/230746, PCT Pub. Date Nov. 19, 2020.
Claims priority of application No. 2019-090613 (JP), filed on May 13, 2019.
Prior Publication US 2022/0213235 A1, Jul. 7, 2022
Int. Cl. C08K 5/47 (2006.01); C08C 19/20 (2006.01); C08K 5/3445 (2006.01); C08L 11/00 (2006.01)
CPC C08C 19/20 (2013.01) [C08K 5/3445 (2013.01); C08K 5/47 (2013.01); C08L 11/00 (2013.01)] 18 Claims
 
1. A sulfur-modified chloroprene rubber comprising a functional group A represented by General Formula (A) below and positioned at a molecular terminal and a functional group B represented by General Formula (B) below and positioned at a molecular terminal, wherein
a mass ratio B/A of a content of the functional group B with respect to a content of the functional group A is more than 0 and 6.00 or less, and
a total amount of the functional group A and the functional group B is 0.10 to 0.60% by mass,

OG Complex Work Unit Chemistry
(In the formula, Ra1 and Ra2 each independently represent a hydrogen atom, a halogen atom, a hydroxy group, an alkoxy group, a carboxy group, a carboxylate group, a cyano group, an alkyl group which may have a substituent, or an arylthio group which may have a substituent, and Ra1 and Ra2 may bond with each other to form a ring which may have a substituent,)

OG Complex Work Unit Chemistry
(In the formula, Rb1 and Rb2 each independently represent a hydrogen atom, a halogen atom, a hydroxy group, an alkoxy group, a carboxy group, a carboxylate group, a cyano group, an alkyl group which may have a substituent, or an arylthio group which may have a substituent, and Rb1 and Rb2 may bond with each other to form a ring which may have a substituent).