Artificial pigment and method for preparing the same
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United States of America Patent
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Jun 15, 2004
Grant Date -
Jan 9, 2003
app pub date -
Jul 29, 2002
filing date -
Dec 18, 2000
priority date (Note) -
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status (Latency Note)
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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.degree. C.; and ii) a seed covering of butadiene polymer having a glass transition temperature of -10 to 20.degree. C.; and b) a core of styrene polymer having a glass transition temperature of 40 to 120.degree. 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). The coating color comprising the artificial pigment of the present invention can make coated paper having excellent dry pick resistance anti high paper gloss and printing gloss as well as stiffness.
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