Abstract: A rubber material containing a sulfur-modified chloroprene polymer, in which a content X (% by mass) of sulfur constituting the sulfur-modified chloroprene polymer and a total amount Y (% by mass) of a conjugate resin acid and a salt of a conjugate resin acid, on the basis of a total amount of the rubber material, satisfy Expression (A) below, and the total amount Y is 1.00% by mass or more. 13.90X?5.

Abstract: Provided is a chloroprene rubber latex adhesive composition superior in initial adhesive strength and normal adhesive strength and also in thermal creep resistance with adherend. A chloroprene rubber latex adhesive composition includes a carboxy-modified chloroprene-based copolymer latex (A) containing a copolymer of chloroprene monomer and an ethylenic unsaturated carboxylic acid and a polyvinylalcohol, a chloroprene-based polymer latex (B) containing a chloroprene homopolymer or a copolymer of chloroprene monomer and other monomer and a rosin acid metal salt and a chlorinated polyolefin resin emulsion (C), wherein the content ratio of the carboxy-modified chloroprene-based copolymer latex (A) to the chloroprene-based polymer latex (B) is 80:20 to 20:80 as solid matter.

Abstract: To provide a polychloroprene latex from which a dip-formed film that is excellent in mechanical properties while having flexibility can be obtained. The polychloroprene latex is a mercaptan-modified polychloroprene latex comprising polychloroprene that is a copolymer of chloroprene and 2,3-dichloro-1,3-butadiene, wherein in a solid state 13C NMR spectrum of the polychloroprene obtained by freeze-drying the mercaptan-modified polychloroprene latex, an area (A) of a peak at 126.2 to 127.6 ppm, an area (B) of a peak at 122.0 to 126.2 ppm and an area (C) of a peak at 129.9 to 130.3 ppm are in the ranges represented by the following expression (I), an amount of the 2,3-dichloro-1,3-butadiene copolymerized is 4 to 35% by mass per 100% by mass in total of the chloroprene and the 2,3-dichloro-1,3-butadiene contained in the polychloroprene, and a toluene-insoluble content of the polychloroprene is 50 to 100% by mass in 100% by mass of the polychloroprene. 4 . 0 1 ? 0 ? 0 ? A B - C ? 5 .

Abstract: A latex composition shows storage stability and spray coating characteristics and gives a soft adhesive layer after drying and a one-pack type aqueous adhesive. The latex composition includes a chloroprene-based polymer latex (A) containing a chloroprene-based polymer in an amount of 50 to 85 mass % as solid matter and an acrylic polymer latex (B) having a glass transition temperature of ?52 to ?9° C. and containing an acrylic polymer containing a sodium alkylbenzenesulfonate having a structure represented by the Chemical Formula (1) or a sodium alkyl diphenyl ether disulfonate in an amount of 15 to 50 mass % as solid matter, in a total amount of 100 parts by mass, and additionally at least one pH regulator (C) selected from boric acid, ammonium sulfate, and amino acids having an isoelectric point of 5.5 to 6.5 in an amount of 3 to 13 parts by mass as solid matter.

Abstract: Provided is a chloroprene rubber latex adhesive composition superior in initial adhesive strength and normal adhesive strength and also in thermal creep resistance with adherend. A chloroprene rubber latex adhesive composition includes a carboxy-modified chloroprene-based copolymer latex (A) containing a copolymer of chloroprene monomer and an ethylenic unsaturated carboxylic acid and a polyvinylalcohol, a chloroprene-based polymer latex (B) containing a chloroprene homopolymer or a copolymer of chloroprene monomer and other monomer and a rosin acid metal salt and a chlorinated polyolefin resin emulsion (C), wherein the content ratio of the carboxy-modified chloroprene-based copolymer latex (A) to the chloroprene-based polymer latex (B) is 80:20 to 20:80 as solid matter.

Abstract: A latex composition gives favorable initial adhesive strength after short drying period, shows storage stability and spray coating characteristics and gives a soft adhesive layer after drying and a one-pack type aqueous adhesive. The latex composition includes a chloroprene-based polymer latex (A) containing a chloroprene-based polymer in an amount of 50 to 85 mass % as solid matter and an acrylic polymer latex (B) having a glass transition temperature of ?52 to ?9° C. and containing an acrylic polymer containing a sodium alkylbenzenesulfonate having a structure represented by the Chemical Formula (1) in an amount of 15 to 50 mass % as solid matter, in a total amount of 100 parts by mass, and additionally at least one pH regulator (C) selected from boric acid, ammonium sulfate, and amino acids having an isoelectric point of 5.5 to 6.5 in an amount of 3 to 13 parts by mass as solid matter.