The present invention relates to a latex composition, a molded body, and a method for producing a molded body, and the latex composition includes a chloroprene polymer (A), and a thiol compound (B) having 2 or more mercapto groups in a molecule.

The present invention relates to a latex composition, a molded body, and a method for producing a molded body, and the latex composition includes a chloroprene polymer (A), and a thiol compound (B) having 2 or more mercapto groups in a molecule.

Disclosed are a polymer having a narrow molecular weight distribution prepared by living radical and a polymer manufacturing method comprising a step of performing living radical polymerization using 0.005 to 0.5 parts by mass of an oxygen radical scavenger per 100 parts by mass of a radical polymerizable monomer.

Disclosed are a polymer having a narrow molecular weight distribution prepared by living radical and a polymer manufacturing method comprising a step of performing living radical polymerization using 0.005 to 0.5 parts by mass of an oxygen radical scavenger per 100 parts by mass of a radical polymerizable monomer.

The present invention relates to a method for producing a chloroprene polymer latex, comprising: adding (B) a sodium. salt of a naphthalene sulfonate formaldehyde condensate and. (C) sodium dodecylbenzenesulfonate to a monomer solution that contains (A-1) 2-chloro-1,3-butadiene (chloroprene) or a monomer solution that contains (A-1) 2-chloro-1,3-butadiene (chloroprene) and (A-2-1) 2,3-dichloro-1,3-butadiene, and performing polymerization. Consequently, the present invention enables the production of a chloroprene polymer latex which is suppressed in aggregates that are generated during the production of a chloroprene polymer latex having a high solid content.

The present invention relates to a method for producing a chloroprene polymer latex, comprising: adding (B) a sodium. salt of a naphthalene sulfonate formaldehyde condensate and. (C) sodium dodecylbenzenesulfonate to a monomer solution that contains (A-1) 2-chloro-1,3-butadiene (chloroprene) or a monomer solution that contains (A-1) 2-chloro-1,3-butadiene (chloroprene) and (A-2-1) 2,3-dichloro-1,3-butadiene, and performing polymerization. Consequently, the present invention enables the production of a chloroprene polymer latex which is suppressed in aggregates that are generated during the production of a chloroprene polymer latex having a high solid content.

The present invention relates to a method for producing a chloroprene polymer latex, comprising: adding (B) a sodium. salt of a naphthalene sulfonate formaldehyde condensate and. (C) sodium dodecylbenzenesulfonate to a monomer solution that contains (A-1) 2-chloro-1,3-butadiene (chloroprene) or a monomer solution that contains (A-1) 2-chloro-1,3-butadiene (chloroprene) and (A-2-1) 2,3-dichloro-1,3-butadiene, and performing polymerization. Consequently, the present invention enables the production of a chloroprene polymer latex which is suppressed in aggregates that are generated during the production of a chloroprene polymer latex having a high solid content.

Provided is a chloroprene-based polymer having an industrially applicable sufficient molecular weight and capable of obtaining a vulcanized rubber excellent in durability and fatigue endurance and an adhesive excellent in layer separation resistance. A chloroprene-based polymer having a number average molecular weight Mn of 150000 to 300000 and comprising a functional group of a structure represented by the general formula (1) or (2) below: ##STR00001##
(wherein in the general formula (1), R1 shows hydrogen, chlorine, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclyl group.)

Provided is a chloroprene-based polymer having an industrially applicable sufficient molecular weight and capable of obtaining a vulcanized rubber excellent in durability and fatigue endurance and an adhesive excellent in layer separation resistance. A chloroprene-based polymer having a number average molecular weight Mn of 150000 to 300000 and comprising a functional group of a structure represented by the general formula (1) or (2) below: ##STR00001##
(wherein in the general formula (1), R1 shows hydrogen, chlorine, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclyl group.)

Disclosed is a block copolymer including one or more blocks of an acrylate polymer and one or more blocks of a chloroprene polymer, wherein the number average molecular weight of the block copolymer is 110,000 or more, the number average molecular weight of the block of a chloroprene polymer is 80,000 or more in total, and the block copolymer has a functional group with a structure represented by the following chemical formula (1) or (2): ##STR00001##
wherein in the chemical formula (1), R.sup.1 represents hydrogen, chlorine, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted aryl group or a substituted, or unsubstituted heterocyclyl group.