Method for producing statistical copolymer containing chloroprene monomer unit and unsaturated nitrile monomer unit, statistical copolymer, latex and use of same
A statistical copolymer and chloroprene technology, applied in the direction of chloroprene adhesives, chemical instruments and methods, applications, etc., can solve the problems of increasing the amount of acrylonitrile copolymerization, and achieve good oil resistance and good mechanical properties Effect
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experiment example 1
[0182] In Experimental Example 1, the effect of the addition method of chloroprene monomer in the manufacturing process, the composition and physical properties of the chloroprene-acrylonitrile statistical copolymer on the mechanical properties and oil resistance of the vulcanized molded article was verified. .
[0183]
Embodiment 1
[0185] (Production of chloroprene-acrylonitrile statistical copolymer latex)
[0186] In a polymerization tank with a heating and cooling jacket and a stirrer with an inner volume of 3 liters, add 28 parts by mass of chloroprene monomer, 28 parts by mass of acrylonitrile monomer, 0.5 parts by mass of diethyl xanthate disulfide, 200 parts by mass of pure water, 5.00 parts by mass of potassium abietate (manufactured by Harima Chemicals Co., Ltd.), 0.40 parts by mass of sodium hydroxide, sodium salt of β-naphthalenesulfonic acid formalin condensate (manufactured by Kao Corporation) 2.0 parts by mass. 0.1 part by mass of potassium persulfate was added as a polymerization initiator, and emulsion polymerization was performed at a polymerization temperature of 40° C. under a nitrogen stream. The additional addition of the chloroprene monomer was carried out continuously as follows: 20 seconds after the start of the polymerization, based on the heat change of the refrigerant 10 secon...
Embodiment 2
[0210] (Production of chloroprene-acrylonitrile statistical copolymer latex)
[0211] In a polymerization tank with an inner volume of 3 liters, add 20 parts by mass of chloroprene monomer, 47 parts by mass of acrylonitrile monomer, 0.5 part by mass of diethyl xanthate disulfide, 200 parts by mass of pure water, and rosin acid 5.00 parts by mass of potassium (manufactured by Harima Chemicals Co., Ltd.), 0.40 parts by mass of sodium hydroxide, and 2.0 parts by mass of sodium salt of β-naphthalenesulfonic acid formalin condensate (manufactured by Kao Corporation). 0.1 part by mass of potassium persulfate was added as a polymerization initiator, and polymerization was performed at a polymerization temperature of 40° C. under a nitrogen stream. The additional addition of the chloroprene monomer was carried out continuously as follows: 20 seconds after the start of the polymerization, based on the heat change of the refrigerant 10 seconds after the start of the polymerization, the ...
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