| abstract |
The present invention relates to a method for producing styrene-butadiene-based latex for paper coating, the method for producing styrene-butadiene-based latex comprising the steps of: a) preparing core latex of styrene-butadiene-based polymer; b) coating the shell polymer with 2 to 4 on the outside of the core latex; And c) adding a chain transfer agent alone after the shell preparation step of step b) to adjust the gel content and molecular weight of the latex outermost layer. The method for preparing styrene-butadiene-based latex comprising the; In the present invention, if the chain transfer agent is added after the production of the multi-shell, it is possible to control the gel content and molecular weight of the outermost layer of latex particles to control the rate at which the film is formed and the degree of film retention when coating the paper. This is very excellent and the ink drying speed and air permeability are improved at the same time. In addition, since the chemical and mechanical safety of the latex is excellent, there are effects that can solve various workability problems that may occur when coating the paper. |