Method of producing a chloroprene-based polymer, polychloroprene latex and adhesive composition

摘要

Provided is a polychloroprene latex extremely superior in adhesion properties.;According to the present invention, chloroprene or a mixture of chloroprene and a monomer copolymerizable with chloroprene is polymerized in the presence of a surfactant in an aqueous medium, in which the surfactant's concentration is lower than its critical micelle concentration (CMC) to obtain a polychloroprene latex. The polychloroprene latex produced according to the present invention is extremely superior in adhesion properties and others and give a smaller amount of deposits during production.

主权项

1. A method of producing a chloroprene-based polymer, comprising:
adding a surfactant to an aqueous medium at a concentration of from 0.00001 wt. parts or more based on 100 wt. parts of the aqueous medium to an amount that is less than a critical micelle concentration (CMC) of the surfactant, to produce a first mixture; nitrogen bubbling the first mixture to produce a second mixture; adding chloroprene or a mixture of chloroprene and a monomer copolymerizable with chloroprene of 2,3-dichloro-1,3-butadiene to the second mixture; and polymerizing the chloroprene or the mixture of chloroprene and a monomer copolymerizable with chloroprene of 2, 3-dichloro-1,3-butadiene, without introducing a hydrophilic group in the polymer, in the presence of the surfactant in the aqueous medium.