| 摘要 |
PURPOSE:To provide the titled compsn. which enables coating to be carried out even when used at a high solid concn., and gives a coated paper having an excellent coated surface and suitable for use as a printing paper, containing a specified pigment, a specified latex contg. an unsaturated carboxylic acid and a small quantity of a water-soluble polymer material. CONSTITUTION:The titled compsn. having a solid content of 60wt% or above and a pH of 8 or above contains 100pts.wt. pigment (A) contg. at least 80wt% CaCO3, 5-20pts.wt. (on a solid basis) copolymer latex (B) obtd. by polymerizing a monomer mixture contg. 5-15wt% ethylenically unsaturated carboxylic acid, e.g. butadiene or styrene contg. 5-15wt% (meth)acrylic acid, and 0.01-1pt.wt. water-soluble polymer material (C), e.g. starch or PVA. Though the quantity of the water-soluble polymer material is small, the water retention is equal to or better than that of conventional compsn. Since the quantity thereof is small, the quantity of water to be used is also small, and hence, a paper coating soln. contg. solids at a high concn. can be obtd. The resulting compsn. has proper viscosity and water retention and good flow characteristics and coating workability, and streak, scratch, etc. can be greatly reduced as compared with a conventional compsn.
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