US 12,486,384 B2
Latex composition and dip-molded body
Tomoya Taniyama, Tokyo (JP); and Kentaro Hayasaka, Tokyo (JP)
Assigned to ZEON CORPORATION, Tokyo (JP)
Appl. No. 17/796,041
Filed by ZEON CORPORATION, Tokyo (JP)
PCT Filed Feb. 15, 2021, PCT No. PCT/JP2021/005463
§ 371(c)(1), (2) Date Jul. 28, 2022,
PCT Pub. No. WO2021/166835, PCT Pub. Date Aug. 26, 2021.
Claims priority of application No. 2020-025425 (JP), filed on Feb. 18, 2020.
Prior Publication US 2023/0086263 A1, Mar. 23, 2023
Int. Cl. C08L 9/04 (2006.01)
CPC C08L 9/04 (2013.01) 11 Claims
 
1. A latex composition comprising a latex of a conjugated diene polymer (A) having a glass transition temperature of 10° C. or less and a latex of a polymer (B) having a glass transition temperature of more than 10° C.,
wherein the conjugated diene polymer (A) is a nitrile group-containing conjugated diene polymer,
the polymer (B) is a homopolymer of acrylic acid ester, methacrylic acid ester, acrylic acid, or methacrylic acid,
the conjugated diene polymer (A) and the polymer (B) are contained in a weight ratio of conjugated diene polymer (A):polymer (B) of 20:80 to 80:20, and
the value of (CS(B)−CS(A)) is more than 0% by weight,
where a chemical stability of the latex of the conjugated diene polymer (A) to CaCl2, when the solids concentration of the latex is 20% by weight, is defined as CS(A) (% by weight), and
a chemical stability of the latex of the polymer (B) to CaCl2), when the solids concentration of the latex is 20% by weight, is defined as CS(B) (% by weight).