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Surface treatment agent for paper

A surface treatment agent and paper technology, applied in thin material treatment, fiber raw material treatment, papermaking, etc., can solve the problems of increased coating amount, difficult to coat paper, high gloss, light weight, low coating amount, etc.

Inactive Publication Date: 2010-09-01
KAO CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the density of the base paper is reduced, the pores increase, so the penetration of the coating liquid into the base paper increases during coating, making it difficult to uniformly cover the base paper surface with a low coating amount.
Therefore, if the base paper is calendered before coating in order to reduce the amount of pores in the base paper, the penetration of the coating liquid into the base paper will decrease, but because the thickness of the paper becomes thinner, no low-density paper can be obtained.
As mentioned above, in order to reduce the weight of coated paper, even if a light and bulky base paper is used, if only a coating liquid mainly composed of an inorganic pigment with a high specific gravity is applied, due to the penetration of the coating liquid, This leads to an increase in the amount of coating, and it is also difficult to achieve weight reduction while maintaining the high gloss of coated paper

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0087] The practice of the invention is illustrated by the following examples. The examples describe the examples of the present invention and do not limit the present invention.

[0088] Hereinafter, "parts" and "%" indicating the compounding amount both represent "parts by weight of solid content" and "% by weight of solid content".

[0089] [Method for producing cationic group-containing copolymer]

[0090] Using the monomers in Table 1, a cationic group-containing copolymer was produced by the following method.

manufacture example 1

[0092] In a 1L beaker, 267.4 g of ion-exchanged water and MOEDES (an equimolar adduct of dimethylaminoethyl methacrylate and dimethyl sulfate (the active ingredient is 80% by weight) are mixed, all are reagents, produced by Wako Pure Chemical Industries, Ltd. Co., Ltd.) 185.63g (active ingredient 148.50g), DMAAm (N,N-dimethylacrylamide, reagent, Wako Pure Chemical Industries, Ltd.) 110.46g, NK-14G (cross-linking agent, polyethylene glycol Alcohol di(methacrylate), manufactured by Shin-Nakamura Chemical Co., Ltd.) 0.415 g, V-50 (polymerization initiator, 2,2'-azobis(2-amidinopropane) dihydrochloride, Wako Pure Chemical Industries, Ltd. Kogyo Co., Ltd.) 0.952 g to prepare monomer aqueous solution A. 1648 g of cyclohexane and 1.94 g of sugar ester S-770 (manufactured by Mitsubishi Kasei Co., Ltd.) as a dispersant were placed in a 5 L glass container, and were uniformly dissolved at 60° C. for 1 hour. After dissolving, it was cooled to 30° C. to prepare a dispersant solution B. ...

manufacture example 2～3

[0096] According to the method of the manufacture example 1 of the multipolymer containing cationic group, the monomer composition shown in Table 1 is composed of the copolymer containing cationic group 2 (average particle diameter is 3.8 μm) and 3 (average particle diameter is 5.1 μm).

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Abstract

Disclosed is a surface treatment agent for paper such as coating base paper. Specifically disclosed is a surface treatment agent for paper, which contains a cationic group-containing copolymer obtained by polymerizing a specific vinyl monomer and a specific cationic group-containing vinyl monomer at a specific molar ratio.

Description

technical field [0001] The present invention relates to a surface treatment agent for paper and coated base paper and coated paper using the same. Background technique [0002] In recent years, there has been a very high demand for weight reduction of printing paper in order to reduce transportation and postage costs, etc. of printing paper. However, simply reducing the weight, that is, reducing the basis weight (grams per square meter) of the printing paper is not preferable since the thickness of the paper will become thinner and the sense of volume of the booklet will be impaired. The expected weight reduction is to reduce the weight of the paper while maintaining the high gloss of the coated paper without reducing the thickness of the paper. On the other hand, with the development of visualization and colorization of printed matter, the demand for coated printing paper with a smooth coating layer on the paper surface as an ink receiving layer is increasing year by year ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H19/20C08F220/56D21H19/82D21H21/16
CPCD21H19/22D21H19/20C08F220/56D21H17/35D21H19/82D21H17/375D21H21/16Y10T428/31783
Inventor 明和善平矢部宪一郎池田康司
Owner KAO CORP