Abstract: The present invention relates to an artificial pigment and a method of preparing the same, specifically, to an artificial pigment with excellent dry pick resistance and to a method of preparing the same. In order to accomplish the present invention, there is provided an artificial pigment of inverted core-shell structure comprising: a) a shell of butadiene polymer including: i) a seed of butadiene polymer having glass transition temperature of −10 to 50° C.; and ii) a seed covering of butadiene polymer having a glass transition temperature of −10 to 20° C.; and b) a core of styrene polymer having a glass transition temperature of 40 to 120° C. Also provided is method of preparing artificial pigment comprising: a) preparing a shell of butadiene polymer; and b) preparing a core of styrene polymer on the inner side of said shell of step a).

Abstract: The present invention relates to styrene-butadienie latex, specifically a method of preparing latex for coating paper which shows excellent adhesion while maintaining printing property and comprised in a composition for coating paper. To achieve the object of the present invention, it provides a method of preparing styrene-butadiene latex comprising the step of emulsion polymerization by adding 0.1 to 10 parts by weight of chain transfer agent comprising; i) monofunctional thiol compound, and ii) polyfunctional thiol compound having at least two thiol groups based on 100 parts by weight of styrene-butadiene monomer composition. The latex prepared by the present method can easily control molecular weight and gel content, so that polymerization stability and mechanical stability are improved and thus, it is possible to print paper with high speed and to improve adhesion.

Abstract: The present invention relates to an artificial pigment and a method of preparing the same, specifically to an artificial pigment with excellent dry pick resistance and a method of preparing the same. In order to accomplish the object, the present invention provides an artificial pigment of core-shell structure comprising; a) shell of butadiene polymer including. i) seed of butadiene polymer having glass transition temperature of −10 to 50° C., and ii) seed covering of butadiene polymer having glass transition temperature of −10 to 20° C., and b) core of styrene polymer having glass transition temperature of 40 to 120° C., and a method of preparing artificial pigment comprising a) preparing shell of butadiene polymer, and b) preparing core of styrene polymer inner side of said shell of a) step.