JP2002363891A - Paper treatment and method for treating paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a paper treatment capable of solving such problems that the conventional paper softening treatments do not give softness to the paper and cause decrease in water absorption of the paper unless a large amount thereof is used, and further that they severely irritate the skin, while glycerol, fatty acid esters, paraffins, tertiary ammonium salts, etc., are each used as the conventional paper softening treatment for various kinds of the paper, such as sanitary paper and tissue paper. SOLUTION: This paper treatment contains a sulfosuccinic acid diester salt expressed by formula (1) (R1 O and R2 O are each an alcohol residue or an alkylene oxide-added alcohol residue, wherein R1 and R2 are identical to or different from each other; and M is an alkali metal, an alkaline earth metal, amine or ammonia). The paper treatment preferably contains the sulfosuccinic acid diester salt having such R1 O and R2 O in general formula (1) as satisfying that they are each an 12-24C alcohol residue or an ethylene oxide-added alcohol residue formed by adding 1-20 mol of ethylene oxide in average to a mol of a 12-24C alcohol residue.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper processing agent capable of imparting flexibility and water absorbency to papers, and a method of processing paper using the processing agent.

[0002]

2. Description of the Related Art Paper and paper products, particularly household paper such as toilet paper and tissue paper, are required to have appropriate flexibility and water absorption. In order to meet such a demand, papers have conventionally been processed with a processing agent. Glycerin, fatty acid esters, paraffins, quaternary ammonium salts, and the like are used as this type of paper processing agent.

[0003]

However, if a large amount of glycerin is not used, the required flexibility of the paper cannot be provided, and if a large amount of glycerin is used to process the paper, the processing cost will increase. Was expensive. In addition, fatty acid esters and paraffins can impart appropriate flexibility to paper with a small amount of use, but have the problem of reducing the water absorption required for paper.
Furthermore, quaternary ammonium salts have high skin irritation and have a problem in safety.

The present invention has been made in view of the above-mentioned conventional problems, and solves the drawbacks of the conventional paper processing agents, and can effectively impart flexibility and water absorption to paper. The purpose of the present invention is to provide a processing method.

[0005]

That is, the paper treating agent of the present invention is characterized by containing a sulfosuccinic acid diester salt represented by the following formula (1). In the present invention, in the sulfosuccinic acid diester, R ₁ O and R ₂ O in the following formula (1) are an alcohol residue having 12 to 24 carbon atoms, and an average of 1 to 20 moles of ethylene oxide added to an alcohol having 12 to 24 carbon atoms. Those which are any of ethylene oxide adduct residues of alcohol obtained by polymerization are preferred.

[0006]

Embedded image

Further, the paper processing method of the present invention is characterized in that the paper processing agent is used so that the sulfosuccinic acid diester salt is contained in the paper in an amount of 0.01 to 10.0% by weight. Features.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION As the sulfosuccinic acid diester salt used in the paper treating agent of the present invention, those prepared according to a conventional method can be used. For example, an alcohol is reacted with 1 mole of maleic anhydride per mole. It can be obtained by reacting the resulting maleic acid diester with bisulfite.

As the alcohol used to obtain the maleic diester, one or more selected from aliphatic saturated alcohols, aliphatic unsaturated alcohols, aromatic alcohols, alicyclic alcohols and the like are used. Aliphatic saturated alcohols and aliphatic unsaturated alcohols having 8 to 24 carbon atoms are preferred, and those having 12 to 24 carbon atoms are more preferred. Particularly, a saturated alcohol mixture having 12 to 13 carbon atoms, such as a synthetic alcohol mixture having 12 to 13 carbon atoms, an aliphatic saturated alcohol having 12 to 18 carbon atoms, oleyl alcohol, etc. Are preferred.

[0010] Alkylene oxide adducts of alcohols such as aliphatic saturated alcohols, aliphatic unsaturated alcohols, aromatic alcohols and alicyclic alcohols can also be used as alcohols for obtaining maleic acid diesters. As the alkylene oxide adduct of alcohol, an aliphatic saturated alcohol having 8 to 24 carbon atoms or an alkylene oxide adduct of an aliphatic unsaturated alcohol is preferable, and among them, an aliphatic saturated alcohol having 12 to 24 carbon atoms or an aliphatic alcohol is preferable. Alkylene oxide adducts of unsaturated alcohols are more preferred. Examples of the alkylene oxide include ethylene oxide, propylene oxide, and butylene oxide, and ethylene oxide and propylene oxide are preferable. Alkylene oxide adducts of alcohols have an average degree of addition polymerization of alkylene oxide to alcohol of 1 to 20.
Are preferred. The alkylene oxide adduct of alcohol may be a compound having a structure in which two or more different alkylene oxides are added to alcohol.
In this case, the alkylene oxide may be added randomly or may be added in a block shape. As the alkylene oxide adduct of alcohol,
Those obtained by addition polymerization of ethylene oxide on average of 1 to 20 moles to an alcohol having 12 or more carbon atoms are preferable in terms of flexibility and water-absorbing effect.

The maleic acid diester can be obtained by reacting 2 moles of alcohol with respect to 1 mole of maleic anhydride. The alcohols may be obtained by reacting the same or different alcohols. May be obtained. That is, it may be obtained by reacting two moles of the same alcohol per mole of maleic anhydride or by reacting two moles of an alkylene oxide adduct of the same alcohol with one mole of maleic anhydride. It may be obtained by reacting the alcohols one by one or by reacting the alkylene oxide adducts of different alcohols one by one. Further, it may be obtained by reacting 1 mol of alcohol with 1 mol of alkylene oxide adduct of alcohol per 1 mol of maleic anhydride.

The maleic acid diester and the bisulfite can be reacted by a usual steam reaction. As the bisulfite, an alkali metal salt and an alkaline earth metal salt can be used, and usually, sodium bisulfite, potassium bisulfite, sodium bisulfite, and anhydrous sodium bisulfite are preferable. The method for producing the dialkyl sulfosuccinate is not limited to the above method.

In the paper treating agent of the present invention, the above-mentioned sulfosuccinic acid diester salt is used as an aqueous solution or emulsion in which the salt is dissolved or dispersed in water. Usually, 10 to 9 active ingredients
It is used as an aqueous solution or emulsion containing about 0% by weight. In order to treat papers with the paper treating agent of the present invention, a method of spraying the papers with a sprayer, a method of immersion treatment with an impregnating machine, and the like can be mentioned, and the salt of the sulfosuccinic acid diester is contained in the treated papers. Is required to be contained in an amount of 0.01 to 10.0% by weight in terms of solids. More preferably, the content of the sulfosuccinic acid diester salt in the paper after the treatment is 0.1 to 5.0% by weight in terms of solid content.
That is, If the content of the sulfosuccinic acid diester salt in the paper is less than 0.01% by weight, sufficient flexibility is not imparted to the paper. On the other hand, if the content exceeds 10.0% by weight, the feeling of paper and the like deteriorates.

In the paper treating agent of the present invention, in addition to the sulfosuccinic acid diester salt, if necessary, other components such as a mineral oil, a leveling agent such as a fatty acid ester, a poly (oxyethylene) alkyl ether, and a poly (oxyethylene) alkyl ether. An emulsifier such as (oxyethylene) fatty acid ester can also be blended.

The papers to be treated by the treating agent of the present invention include:
Examples include paper towels, tissue paper, toilet paper, facial tissue, dust paper, paper napkins, kyoka paper, and the like.

[0016]

EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples.

Examples 1 to 9 The active ingredients shown in Table 1 were used.
The treating agent was prepared by dissolving or dispersing the active ingredient in water so as to be 0% by weight (when two or more kinds of active ingredients were contained, the total content was 40.0% by weight).

[0018]

[Table 1]

Each of the treating agents is sprayed onto a tissue paper which has not been subjected to a softening treatment so that the adhered amount becomes the amount shown in Table 1 (the amount of the active ingredient in terms of solid content).
Air-dry for 24 hours, and then heat and humidity room (temperature 20
Temperature, humidity 65% RH) for more than 12 hours, after the moisture content is equilibrated, the flexibility of tissue paper,
The water absorption was evaluated. The results are shown in Table 1 together with the case of untreated tissue paper.

The flexibility and water absorption of the treated tissue paper were evaluated as follows. Flexibility Five papers to be tested were gripped with one hand, and the flexibility was evaluated. The evaluation criteria were the following five levels. 5: Very soft. 4: Soft. 3: Slightly soft. 2: Equivalent to when no softener is used. 1: Not soft.

Water Absorption A water drop (ion-exchanged water) was dropped from a dropper on the treated tissue paper, and the water absorption was evaluated based on the following criteria in comparison with untreated tissue paper. ：: good water absorption compared to untreated one. Δ: Water absorption similar to that of untreated product. X: The water absorption is worse than that of the untreated one, and the original water absorption of the paper is impaired.

Comparative Examples 1 to 9 The active ingredients shown in Table 2 were used.
0% by weight (when two or more active ingredients are contained, the total content is 40.0% by weight, and when combined with an emulsifier, the total content is 40.0% by weight, including the emulsifier). Thus, the treating agent was prepared by dissolving or dispersing the active ingredient in water. For Comparative Examples 7 to 9, in which the active ingredient was poor in water solubility and self-emulsifiability, the amount of polyoxyethylene alkyl ether shown in Table 2 was used as an emulsifier, and the treatment agent was adjusted by emulsification by a hot water addition method. . As an emulsifier, Comparative Example 7 used polyoxyethylene (30 mol) lauryl ether, Comparative Example 8 used polyoxyethylene (20 mol) stearyl ether, and Comparative Example 9 used polyoxyethylene (8 mol) cetyl ether. .

Each of the treating agents was spray-treated on a tissue paper not subjected to a softening treatment so as to have an adhesion amount shown in Table 2, and then air-dried for 24 hours. After being left in an atmosphere of 65% RH for 12 hours or more and the moisture content was equilibrated, the flexibility and water absorption of the tissue paper were evaluated in the same manner as in the examples. Table 2 shows the results.

[0024]

[Table 2]

[0025]

As described above, the paper treating agent of the present invention can impart excellent flexibility to paper. Further, there is no problem that water absorbency of papers is reduced when trying to impart flexibility as in the case of conventional treatment agents, and papers treated with the treatment agent of the present invention have an effect of being excellent in flexibility and water absorbency.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Kazuyoshi Kuninose 1 at Nishiide, Noyoro-cho, Iwakura-shi, Aichi Prefecture Inside Nagoya Plant of Miyoshi Oil & Fats Co., Ltd. 1 No. 1 Miyoshi Oil & Fat Co., Ltd. Nagoya Plant F-term (reference) 4J005 AA12 BD02 BD06 4L055 AG34 AG36 AH29 AH50 BE08 EA30 EA32 FA16 GA29

Claims (3)

[Claims] 1. A paper treating agent comprising a sulfosuccinic acid diester salt represented by the following formula (1). Embedded image 2. A sulfosuccinic acid diester salt, wherein R ₁ O and R ₂ O in the formula (1) are alcohol residues having 12 to 24 carbon atoms, and ethylene oxide has an average of 1 to 20 mol in alcohols having 12 to 24 carbon atoms. 2. The paper treating agent according to claim 1, which is any residue of an ethylene oxide adduct of alcohol obtained by addition polymerization. 3. The paper processing agent according to claim 1, wherein the sulfosuccinic acid diester salt is contained in the paper in an amount of 0.01%.
A paper processing method, wherein the paper is processed so as to be contained in an amount of up to 10.0% by weight.