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Printability-improving agent and paper applied with the same

A technology of printability and improver, applied in the fields of paper, surface treatment agent and printability improver, can solve the problem of increasing the amount of surface sizing agent used, the deterioration of printability, and the sizing degree of solution-type surface sizing agent. Insufficient, etc.

Inactive Publication Date: 2007-07-25
NIPPON PAPER IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for these neutral printing papers, the sizing degree of the aforementioned solution-type surface sizing agent is not sufficient. In order to prevent color deviation in multi-color printing, it is necessary to increase the amount of surface sizing agent used. As a result, there are Further deterioration of printability

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0125]In a 1L four-necked flask equipped with a stirrer, a thermometer, a reflux cooling tube, and a nitrogen inlet tube, add 70 parts of 2-ethylhexyl methacrylate, 30 parts of dimethylaminoethyl methacrylate, 2, 2.5 parts of 2'-azobisisobutyronitrile and 44 parts of isopropanol were kept at 80°C for 3 hours, and then 0.4 parts of 2,2'-azobisisobutyronitrile was added and further kept at the same temperature for 2 hours. Then, 12.7 parts of acetic acid (relative to 100 mol% of dimethylaminoethyl methacrylate) and 251 parts of water were added, and isopropanol was distilled off. Thereafter, 34 parts of water and 17.7 parts of epichlorohydrin (with respect to 100 mol % of dimethylaminoethyl methacrylate) were added as a quaternizing agent, and the mixture was maintained at 80° C. for 2 hours. Thereafter, it was diluted with water to obtain a printability-improving agent 1 with a solid content of 20.3%. In addition, there are basically no residual monomers that have not been cop...

Embodiment 2

[0127] Except forming the monomer composition described in Example 2 of Table 1, not using a quaternizing agent, and not performing a quaternizing reaction, a printability improving agent with a solid content of 20.5% was obtained in the same manner as in Example 1 2.

Embodiment 3～9

[0129] Except that the type and amount of the hydrophobic monomer, the type and amount of the monomer having a tertiary amino group, and the type and amount of the quaternizing agent are changed as shown in Table 1, the same as that of the printability improving agent 1 is obtained. Printability enhancer. In addition, the solid content of the obtained printability improving agents 3-9 is shown in Table 1.

[0130] [Table 1]

[0131] hydrophobic monomer unit

Monomer units containing quaternary ammonium salts

Solid content

type

share

type

share

type

share

type

share

weight%

％

Example 1

EHMA

70.0

-

-

DM

30.0

ECH

17.7

40.5

20.3

Example 2

EHMA

67.5

MMA

10.0

DMC

22.5

-

-

22.5

20.5

Example 3

EHMA

85.0

-

-

DM

15.0

ECH

8.8

21.9

20.3

Example 4

EHMA

40.0

...

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PUM

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Abstract

The invention provides a printability-improving agent and surface-treating agent capable of improving the off set printability of a paper printed by an offset ink, especially of newspaper-printing paper, and the paper capable of performing the printing with the offset ink, especially newspaper-printing paper. This printability-improving agent contains a copolymer obtained by polymerizing a hydrophobic monomer unit selected from a specific group with a monomer unit containing a quaternary ammonium salt to obtain a cationic copolymer, then further polymerizing the hydrophobic monomer, or by polymerizing the hydrophobic monomer in the presence of the cationic copolymer obtained by polymerizing the hydrophobic monomer unit selected from the specific group with the monomer unit containing the quaternary ammonium salt, and a surfactant. The printability-improving agent containing the copolymer or the surface-treating agent containing the printing adoptability-improving agent and a water soluble polymeric substance selected from a specific group is applied on the surface of a stock paper, especially of the newspaper-printing stock paper.

Description

technical field [0001] The present invention relates to a printability improving agent, a surface treatment agent, and paper, especially newspaper printing paper. Furthermore, in detail, it relates to a printability-enhancing agent and a surface treatment agent capable of improving the offset printability of paper printed with offset ink, especially newspaper printing paper, and capable of performing good printing with offset ink. Paper, especially newspaper printing paper. Background technique [0002] In recent years, newspaper printing paper has been required to be lightweight and have a high compounding of deinked pulp. In addition, in printing, offset printing, high-speed printing, and colorization are rapidly advancing, and the requirements for printability are becoming stricter. [0003] In the past, newspaper printing paper was made by mixing an aqueous solution of an alkali metal salt of a styrene-maleic acid copolymer, an aqueous solution of an alkali metal salt o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/20
Inventor 石冈智横原知宏野野村文就南里泰德
Owner NIPPON PAPER IND CO LTD
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