| 摘要 |
The present invention provides a copolymer latex capable of remarkably improving the bond strength of coated paper, excelling in coated paper properties such as print gloss, and excelling in coating operability such as redispersibility, mechanical stability, and anti-stick properties, a process for producing the copolymer latex, and a paper coating composition. In the copolymer latex of the present invention, the content of components detected before an elution time at which a component having a polystyrene-reduced molecular weight of 1,000,000 is detected in a molecular-weight distribution measured by gel permeation chromatography (GPC) is 31% or more, the weight average molecular weight of components detected after the elution time at which the component having a polystyrene-reduced molecular weight of 1,000,000 is detected is 30,000-400,000, and the toluene insoluble content is 31 wt % or more.
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