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Rosin-type emulsion sizing agent and paper obtained using the sizing agent

A technology of sizing agent and rosin, applied in the direction of adding rosin and adding water repellent, to achieve the effect of excellent mechanical stability and sizing effect

Active Publication Date: 2017-06-20
ARAKAWA CHEM IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This problem is easily evident, for example, in the case of papermaking systems at high temperatures or high hardness

Method used

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  • Rosin-type emulsion sizing agent and paper obtained using the sizing agent
  • Rosin-type emulsion sizing agent and paper obtained using the sizing agent
  • Rosin-type emulsion sizing agent and paper obtained using the sizing agent

Examples

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Embodiment

[0155] Hereinafter, the present invention will be specifically described with reference to Examples and Comparative Examples. Of course, the scope of the present invention is not limited by these examples. Meanwhile, in each example, unless otherwise specified, parts and % are all by weight.

[0156] Weight average molecular weight

[0157] For the component (A-1), the weight average molecular weight is determined according to the method specified below:

[0158] ・When the component (a4) is not used: by gel permeation chromatography (apparatus used: product name "HLC8120GPC", manufactured by Tosoh Corporation, Japan; column: product name "TSK-GEL ALPHA-M", manufactured by Tosoh Corporation, Japan ) System) measured polystyrene conversion value.

[0159] ・When component (a4) is used: Polyethylene glycol measured by gel permeation chromatography (device used: HLC8120GPC manufactured by Tosoh Corporation; column: TSK-GEL ALPHA-M manufactured by Tosoh Corporation, developing so...

manufacture example 1

[0178] In a reaction vessel equipped with a stirrer, a thermometer, a reflux cooler, and a nitrogen gas introduction pipe, add the following ingredients, stir the mixed solution under nitrogen bubbling, and raise the temperature of the reaction system to 60°C. The added ingredients are as follows : 80% methacrylic acid 56.25g (53.98mol%), itaconic acid 5.00g (3.97mol%) as (a1) component; butyl acrylate 5.00g (4.03mol%) as (a2) component, acrylic acid 2 - 5.00 g (2.80 mol %) of ethylhexyl ester, 25.00 g (24.79 mol %) of styrene; 5.00 g (3.27 mol %) of sodium methallylsulfonate as component (a3); 5.00 g (3.27 mol %) as component (a5) 10.00 g (7.16 mol %) of hydroxybutyl acrylate; and 1.0 g of a surfactant (Hytenol LA-10, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.), 300 g of ion-exchanged water, and α-formazol as a chain transfer agent Styrene dimer 4.00g. Then, add 5.00 g of ammonium persulfate (APS) as a polymerization initiator, heat up to 90° C., and keep warm fo...

manufacture example 2

[0181]In a reaction vessel equipped with a stirrer, a thermometer, a reflux cooler, and a nitrogen gas introduction tube, 1.0 g of a surfactant (Hytenol LA-10, manufactured by Daiichi Kogyo Pharmaceutical Co., Ltd.) and 63.79 g of 80% methacrylic acid were added. g (59.40 mol%), sodium styrene sulfonate 4.00g (1.95 mol%), methyl methacrylate 16.00g (16.03 mol%), 2-ethylhexyl acrylate 14.00g (7.62 mol%), styrene 15.00 g (14.44 mol %), 300 g of ion-exchanged water, and 5.00 g of α-methylstyrene dimer as a chain transfer agent were mixed, and the temperature of the reaction system was raised to 60° C. while stirring the mixture under nitrogen bubbling. Next, 4.00 g of APS was added, the temperature was raised to 90° C., and the temperature was maintained for 100 minutes. After that, 2.0 g of APS was added, and the temperature was maintained at 90° C. for 60 minutes. Next, 43.7 g of 48% sodium hydroxide aqueous solution was added, ion-exchange water was added, and the aqueous solu...

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Abstract

The present invention provides a rosin-type emulsion sizing agent having good storage stability and mechanical stability, and a paper having a good sizing effect obtained by using the sizing agent. The present invention relates to a rosin-type emulsion sizing agent and a paper obtained by using the sizing agent, wherein the rosin-type emulsion sizing agent is emulsified by the emulsion (B) in the presence of the polymer dispersant (A) (B) is at least one selected from the group consisting of a rosin (B1) and a rosin ester (B2), wherein the rosin (B1) is a rosin (b1) And the alpha, beta-unsaturated carboxylic acid (b2), said rosin (b1) containing 0.1 to 8% by weight of tropisol, 15 to 34.9% by weight of pimaric acid, and rosin (84) is a reaction product of the rosin (b1) and the polyol (b3).

Description

technical field [0001] The present invention relates to a rosin type emulsion sizing agent and paper obtained by using the sizing agent. Background technique [0002] The rosin-type emulsion sizing agent refers to a composition obtained by emulsifying rosin-like substances in the presence of various emulsifiers and water. The paper obtained using this rosin-type emulsion sizing agent exhibits good sizing effect due to the emulsion particles fixed to the pulp fibers. [0003] Rosin-based substances have conventionally been so-called fortified rosins, which are raw material rosins such as gum rosin, tall oil rosin, and wood rosin, modified with α,β-unsaturated carboxylic acids such as maleic acid from the viewpoint of excellent sizing and their esterified products are well received due to their excellent sizing properties (see, for example, Patent Documents 1-3). [0004] However, rosin-type emulsion sizing agents are thermodynamically unstable non-equilibrium systems. For ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H21/16D21H17/62
CPCD21H17/62D21H21/16
Inventor 须田雅彦保郡淳一卜竞舟熊谷泰起
Owner ARAKAWA CHEM IND LTD
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