	US 12,139,563 B2
	Isoprene-based polymer latex composition
Masahiro Ogawa, Tokyo (JP); Tomoaki Murata, Tokyo (JP); Noriko Ogawa, Tokyo (JP); and Masanao Kamijo, Tokyo (JP)
Assigned to Resonac Corporation, Tokyo (JP)
Appl. No. 17/421,149
Filed by SHOWA DENKO K.K., Tokyo (JP)
PCT Filed Nov. 26, 2019, PCT No. PCT/JP2019/046125 § 371(c)(1), (2) Date Jul. 7, 2021, PCT Pub. No. WO2020/144955, PCT Pub. Date Jul. 16, 2020.
Claims priority of application No. 2019-002653 (JP), filed on Jan. 10, 2019.
Prior Publication US 2022/0073657 A1, Mar. 10, 2022
Int. Cl. C08F 136/08 (2006.01); B29C 41/00 (2006.01); C08K 3/22 (2006.01); C08K 5/00 (2006.01); C08L 11/02 (2006.01); C08L 93/04 (2006.01); B29L 31/48 (2006.01)

CPC C08F 136/08 (2013.01) [B29C 41/003 (2013.01); C08K 3/22 (2013.01); C08K 5/0025 (2013.01); C08K 5/005 (2013.01); C08L 11/02 (2013.01); C08L 93/04 (2013.01); B29L 2031/4864 (2013.01); C08K 2003/2296 (2013.01); C08L 2201/52 (2013.01); C08L 2205/18 (2013.01)]

18 Claims

1. An isoprene-based polymer latex composition comprising a chloroprene polymer latex (A), an isoprene polymer latex (B), and an emulsifier (C), wherein the chloroprene polymer latex has a z-average particle size of chloroprene polymer particles contained therein of 180 nm or greater and smaller than 300 nm and a tetrahydrofuran insoluble fraction of 88 to 99% by mass based on the amount of solid content of the chloroprene polymer latex (A), the chloroprene polymer latex (A) is (1) a copolymer latex of chloroprene (A-1) and 2,3-dichloro-1,3-butadiene (A-2-1), or (2) a copolymer latex of chloroprene (A-1), 2,3-dichloro-1,3-butadiene (A-2-1), and another monomer (A-2-2), and the copolymer is obtained by copolymerization in which the ratio of 2,3-dichloro-1,3-butadiene (A-2-1) is 5.0 to 30.0% by mass relative to the total amount of the monomer components chloroprene (A-1) and 2,3-dichloro-1,3-butadiene (A-2-1) of 100% by mass.