	US 12,116,471 B2
	Chloroprene copolymer latex and production method therefor
Shu Kaneko, Tokyo (JP); Masahiro Ogawa, Tokyo (JP); and Akira Shibuya, Tokyo (JP)
Assigned to Resonac Corporation, Tokyo (JP)
Appl. No. 17/615,214
Filed by SHOWA DENKO K.K., Tokyo (JP)
PCT Filed Oct. 23, 2020, PCT No. PCT/JP2020/039882 § 371(c)(1), (2) Date Nov. 30, 2021, PCT Pub. No. WO2021/079981, PCT Pub. Date Apr. 29, 2021.
Claims priority of application No. 2019-194507 (JP), filed on Oct. 25, 2019.
Prior Publication US 2022/0227976 A1, Jul. 21, 2022
Int. Cl. C08L 11/02 (2006.01); A41D 19/00 (2006.01); A41D 19/04 (2006.01); A61B 42/10 (2016.01); B29C 41/00 (2006.01); B29C 41/14 (2006.01); C08J 5/02 (2006.01); B29K 105/00 (2006.01); B29L 31/48 (2006.01)

CPC C08L 11/02 (2013.01) [A41D 19/0055 (2013.01); A41D 19/04 (2013.01); A61B 42/10 (2016.02); B29C 41/003 (2013.01); B29C 41/14 (2013.01); C08J 5/02 (2013.01); B29K 2011/00 (2013.01); B29K 2105/0064 (2013.01); B29L 2031/4864 (2013.01); C08J 2311/02 (2013.01); C08J 2493/04 (2013.01); C08L 2201/52 (2013.01)]

9 Claims

1. A latex of a chloroprene copolymer consisting of monomer units derived from 2-chloro-1,3-butadiene (chloroprene) and monomer units derived from 2-methyl-1,3-butadiene, wherein

a tetrahydrofuran insoluble content in the chloroprene copolymer is 20% by mass or less,

a weight average molecular weight of a tetrahydrofuran soluble component at 25° ° C. of the chloroprene copolymer is 550,000 or more, and

a proportion of the monomer units derived from 2-methyl-1,3-butadiene in the chloroprene copolymer is 10 to 27 mol %.