COATING SOLUTION AND COATED PAPER COATED WITH THE SAME

Title:

COATING SOLUTION AND COATED PAPER COATED WITH THE SAME

Document Type and Number:

WIPO Patent Application WO/2008/041715

Kind Code:

A1

Abstract:

A coating solution comprising: (A) an aragonite-type light calcium carbonate microparticle having an average major axis diameter of 1.0 to 2.8 μm and an average minor axis diameter of 0.15 to 0.3 μm, which is produced by diluting a calcium hydroxide slurry that has been treated by high-speed shearing until the slurry has a viscosity of 1000 cP or more at a concentration of 400 g/l to a concentration more than 50 g/l and then blowing carbon dioxide into the diluted slurry at a reaction starting temperature of 20 to 60ºC and at a rate of 1 to 3 l/min per kg of calcium hydroxide; and (B) a pigment comprising a wet heavy calcium carbonate cake. The coating solution enables to provide a coated paper having an excellent degree of brilliance and an excellent degree of whiteness, despite containing no kaolin.

Inventors:

SHIMONO KAZUHISA (JP)
TAKANO TATSUO (JP)
KAWAZU TORU (JP)

Application Number:

PCT/JP2007/069317

Publication Date:

April 10, 2008

Filing Date:

October 02, 2007

Export Citation:

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Assignee:

OKUTAMA KOGYO CO LTD (JP)
SHIMONO KAZUHISA (JP)
TAKANO TATSUO (JP)
KAWAZU TORU (JP)

International Classes:

C09D201/00; C01F11/18; C09D5/02; C09D7/45; C09D7/61; D21H19/38

Foreign References:

JPS5522072A	1980-02-16
JPH04295010A	1992-10-20
JPH0673695A	1994-03-15
JPH04295010A	1992-10-20
JPS5551852B2	1980-12-26
JPH0134930B2	1989-07-21
JPH0610298A	1994-01-18
JPH0673698A	1994-03-15
JP2005280035A	2005-10-13

Other References: