JPH11148023A - Highly water-absorptive polymer composition - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a highly water-absorptive polymer composition having improved time stability against the body fluid and capable of suppressing odor by sulfur-containing reducing agent(s) as well as offensive odor caused by the body fluid. SOLUTION: This composition is obtained by including (A) a highly water- absorptive polymer having cross linkage structure and containing carboxyl groups and/or carboxylate groups as component(s) of the polymer. (B) sulfur- containing reducing agent(s), and (C) a silicate compound complex containing SiO2 at 30-80 wt.%, at a (B+C)/A weight ratio of 0.5-10% and a B:C weight ratio of 9:1 to 1:9.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a superabsorbent polymer composition. More specifically, the present invention relates to a superabsorbent polymer composition comprising a sulfur-containing reducing agent and a specific composite silicate compound. The superabsorbent polymer composition of the present invention improves the stability over time of the gel after absorbing water without impairing the original water absorbing performance of the superabsorbent polymer composition, and further has a deodorizing function by combining ammonia, Generation of malodorous substances such as sulfur odor can be strongly suppressed. Therefore, it is very effective against body fluids such as urine, blood, sweat and the like, and can be effectively used as sanitary materials for children / adult paper diapers, sanitary products, and various pads.

[0002]

2. Description of the Related Art In recent years, superabsorbent polymers have been used not only in sanitary fields such as sanitary products and disposable disposable diapers, but also in various industrial products such as water-blocking materials, anti-condensation agents, freshness-retaining materials, and solvent dehydrating agents, as well as greening. It has also been put to practical use in the agricultural and horticultural fields, and its application range is expanding further. Among these application fields, sanitary articles such as sanitary articles, disposable disposable diapers, incontinence pads, etc. have recently been improved in wearing feeling due to improvements in materials used, draping, various gatherings, and the like, and the wearing time has been increasing.

[0003] A superabsorbent polymer becomes a gel when absorbing body fluids such as urine, menstrual blood, and sweat. However, the gel deteriorates and decomposes over time to lose its strength, and at the same time, the surface and inside of the gel become sticky. It comes to be. That is, the liquid retention of the body fluid absorbing gel decreases with time. Problems such as liquid leakage during use of the sanitary ware and deterioration of the wearing sensation due to this have become more serious with the recent increase in the wearing time.

As a method of improving the gel stability, for example, a method of increasing the crosslink density of a superabsorbent polymer can be considered, but in this case, there is a problem that the water absorbing ability of the polymer is reduced. JP-A-63-118375 discloses a method of incorporating an oxygen-containing reducing inorganic salt and / or an organic antioxidant in a polymer, and JP-A-63-153060 discloses a method of containing an oxidizing agent. JP-A-63-1277
No. 54 discloses a method of containing an antioxidant,
Japanese Patent Application Laid-Open No. 3-272349 proposes a method of including a sulfur-containing reducing agent, and Japanese Patent Application Laid-Open No. 1-275661 proposes a method of including a phosphinic acid group or phosphonic acid group-containing amine compound or a salt thereof.

Among the above-mentioned improvement methods, Japanese Patent Application Laid-Open No. 63-11 / 1988
The method using a sulfur-containing reducing agent described in JP-A-8375 and JP-A-63-127754 is an excellent method for improving the stability over time of a highly water-absorbing polymer with high safety and at a low price. However, since a sulfur component is an essential component, a malodor peculiar to sulfur such as sulfur dioxide or mercaptan is generated immediately after absorbing body fluid. In particular, when the sulfur-containing reducing agent is added in an amount of 0.5% by weight or more based on the superabsorbent polymer in order to improve the stability over time of the gel, the above tendency becomes remarkable. This has been a major problem when using the composition for sanitary materials.

As a method for removing malodorous substances generated from body fluids, JP-A-59-105448 discloses a method containing activated carbon, and JP-A-60-158861 discloses a leaf extract of a Camellia plant. Japanese Patent Application Laid-Open Nos. Hei 1-5546 and Hei 1-5547 disclose a method for containing an oxide of a specific metal.
No. 55 discloses a method of incorporating tea production,
No. 7143 proposes a method of including a metal complex, and the like.

[0007]

However, in any of these methods, the malodorous substance can be removed to some extent in the state of the polymer powder, but the deodorizing performance is greatly reduced after the body fluid is absorbed and gelled. Problem. Also, in any of these methods, there is almost no effect on the temporal stability of the liquid-absorbing gel. The present invention
It is intended to solve the problems related to the generation of the offensive odor substance in the superabsorbent polymer containing the above sulfur-containing reducing agent, the original water absorbing performance of the present superabsorbent polymer composition,
It is an object of the present invention to provide a water-absorbing polymer composition capable of suppressing the sulfur odor generated from a sulfur-containing reducing agent immediately after absorbing a body fluid while maintaining the stability over time of the body fluid.

[0008]

Means for Solving the Problems The inventors of the present invention have conducted further intensive studies under such a background. As a result, in addition to a sulfur-containing reducing agent, a specific composite silicate compound (hereinafter referred to as composite (It may be referred to as silicate)), the stability of the body fluid over time is excellent, the ionic odor generated immediately after liquid absorption can be suppressed, and the polymer composition is in a gel state in which powder and body fluid are absorbed. Thus, the inventors have found that they also have the ability to remove malodorous substances generated from body fluids, that is, they also have the ability to deodorize, and have completed the present invention.

That is, the gist of the present invention is to provide (A) a superabsorbent polymer having a crosslinked structure and containing a carboxyl group and / or a carboxylate group as a constituent of the polymer, and (B) a sulfur-containing reducing agent. and (C) 30~ the SiO ₂
A composite silicate compound contained in a range of 80% by weight, wherein the total amount of (B) and (C) is 0.5 to 10 parts by weight with respect to 100 parts by weight of (A), and (B) And (C) in a weight ratio of 90:10 to 10:90 in the superabsorbent polymer composition. Hereinafter, the present invention will be described in detail.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION (1) Superabsorbent polymer composition <Superabsorbent polymer (A)> The superabsorbent polymer used in the present invention has a crosslinked structure, and a carboxyl group as a component of the polymer. Any polymer may be used as long as it has a high water-absorbing polymer having a carboxylate group. Among them, crosslinked polyacrylate, crosslinked starch-acrylic acid graft copolymer, hydrolyzed starch-acrylonitrile graft copolymer crosslinked product, hydrolyzed acrylate-vinyl acetate copolymer, acrylate Preferred examples include crosslinked acrylamide copolymers and hydrolyzed products of crosslinked polyacrylonitrile. Other than the above, polyethylene oxide crosslinked with acrylic acid, crosslinked product of sodium carboxycellulose, maleic anhydride-
Isobutylene, maleic acid salt to acrylic acid, itaconic acid salt, 2-acrylamide-2-methylsulfonic acid salt, 2-
Examples thereof include those obtained by copolymerizing comonomers such as acroylethanesulfonic acid and 2-hydroxyethyl acrylate. Examples of the type of the salt of the carboxylate group in the superabsorbent polymer include an alkali metal salt, an alkaline earth metal salt, and an ammonium salt. Among them, an alkali metal salt is preferable.

The above superabsorbent polymer is generally prepared by adding a polymerizable monomer having a carboxyl group and / or a carboxylate group such as acrylic acid (salt) or maleic anhydride (salt) to water, a radical polymerization initiator, It can be obtained by polymerization by a known aqueous solution polymerization method, solution polymerization method, or reverse phase suspension polymerization method in the presence or absence of a crosslinking agent. For example, Japanese Patent Publication No. 60-25045
JP-A-57-158210, JP-A-57-214
No. 05, JP-B-53-46199, JP-A-58-71
No. 907, JP-A-55-84304, JP-A-56-9
1837, JP-A-2-49002 and JP-A-62
It can be produced by the methods described in JP-A-62807 and other publications.

The cross-linking structure of the superabsorbent polymer used in the present invention is internal cross-linking or surface cross-linking. It is made by crosslinking. On the other hand, the internal crosslinking includes self-crosslinking derived from the polymerizable monomer itself due to, for example, heat during polymerization without using a crosslinking agent. As a method using a cross-linking agent, for example, a cross-linking agent having two or more double bonds in a molecule and showing copolymerizability with a polymerizable monomer or a functional group in a polymerizable monomer in a molecule is used. For example, those having two or more functional groups capable of reacting with a carboxyl group and / or a carboxylate group during polymerization or during drying after polymerization are exemplified. Examples of the former crosslinking agent include N, N'-methylenebisacrylamide, ethylene glycol di (meth) acrylate, diethylene glycol di (meth) acrylate, propylene glycol di (meth) acrylate, polypropylene glycol di (meth) acrylate, and diallyl. Examples include phthalate, diallyl maleate, diallyl terephthalate, triallyl cyanurate, triallyl phosphate and the like. Further, examples of the latter crosslinking agent include ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, di- or polyglycidyl ether of aliphatic polyhydric alcohol, and the like. Further, as having both the former and latter functions, N-
Examples include methylol acrylamide and glycidyl methacrylate. The above superabsorbent polymer is generally obtained as a gel containing water as a polymer, but this hydrous gel is usually dehydrated as it is or by azeotropic distillation with an inert solvent, and pulverized / classified as necessary. Done and become a product.

The surface cross-linking of the present invention does not treat the inside of the superabsorbent polymer particles, but means modifying the surface of the super-absorbent polymer by cross-linking or hydrophobizing the surface during the manufacturing process or the product. . As the crosslinking agent used for such surface crosslinking, any crosslinking agent having two or more functional groups capable of reacting with a carboxyl group and / or a carboxylate group can be used. For example, polydiglycidyl ether compounds, haloepoxy compounds,
Aldehyde compounds, isocyanate compounds and the like can be used, but polyglycidyl ethers are particularly common.
The use amount and addition method of these crosslinking agents are not particularly limited, but are usually used in the range of 0.005 to 5% by weight based on the polymer. In addition to the above crosslinking agents, polyvalent metal salts such as aluminum hydroxide and the following silane compounds can also be used for surface crosslinking.

[0014]

Embedded image X (R) _m Si (Y) _3-m

(Wherein, X represents a functional group capable of reacting with a carboxyl group and / or a carboxylate group in the superabsorbent polymer, R represents a hydrocarbon group, and Y represents a hydrolyzable group. m is 0, 1 or 2. Specifically, γ-glycidoxypropyltrimethoxysilane, γ-glycidoxypropylmethyldiethoxysilane, β- (3,4-epoxycyclohexyl) ethyltrimethoxy Silane, γ- (2-aminoethyl) aminopropyltrimethoxysilane, γ- (2-aminoethyl)
Aminopropylmethyldimethoxysilane, γ-aminopropyltriethoxysilane, N-phenyl-γ-aminopropyltrimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-chloropropyltrimethoxysilane, γ-chloropropylmethyldimethoxysilane,
Octadecyldimethyl [3- (trimethoxysilyl) propyl] ammonium chloride and the like.

As the polyvalent metal compound, Mg, Ca, B
a, a divalent metal compound such as Zn, and a trivalent metal compound such as Al and Fe; specifically, magnesium sulfate, aluminum sulfate, ferric chloride, calcium chloride, magnesium chloride, aluminum chloride, polyaluminum chloride, and nitric acid Iron, calcium nitrate, aluminum nitrate, aluminum hydroxide and the like are used. The use amount and addition method of these compounds are not particularly limited, but are usually 0.001 to 10% by weight based on the polymer.

When the surface of the superabsorbent polymer is treated with these compounds, the surface of the superabsorbent polymer is reacted with the polymer on the surface, and these compounds are hydrophobized or modified, and in some cases, cross-linked to make the surface hydrophobic. In addition, fusion of particles can be prevented, and the water absorption rate can be increased. The average particle size of the superabsorbent polymer used in the present invention is usually 10 to 2
000 μm, preferably 50 to 1000 μm.

<Sulfur-containing reducing agent (B)> The sulfur-containing reducing agent used in the present invention is not particularly limited as long as it is a sulfur-containing compound having a reducing action. For example, ammonium sulfide, sodium sulfide, potassium sulfide, Sulfides such as lithium sulfide; hydrosulfides represented by sodium hydrosulfide; thiosulfates such as sodium thiosulfate and potassium thiosulfate;
Sulfurous acid; sulfites such as sodium sulfite and potassium sulfite; bisulfites such as sodium bisulfite and potassium bisulfite; dithionites such as hydrosulfite; mercaptoethanol, cysteine, methyl mercaptan, ethyl mercaptan, propyl mercaptan;
And mercaptans such as butyl mercaptans. Among the above sulfur-containing reducing agents, thiosulfate, sulfurous acid, sulfite, and hydrogen sulfite are preferable from the viewpoints of safety, price, and effect of addition.

The amount of the sulfur-containing reducing agent and the complex silicate compound used depends on the type, properties and average particle size of the superabsorbent polymer used, but is generally based on 100 parts by weight of the superabsorbent polymer. 0.5 in total amount with composite silicate
10 to 10 parts by weight, preferably 0.5 to 5 parts by weight.
When the amount is less than 0.5 part by weight, the effect is insufficiently developed, and when the amount exceeds 10 parts by weight, the effect is saturated. The mixing ratio of the sulfur-containing reducing agent and the composite silicate is 10: 10 by weight.
90-90; 10, preferably 30: 70-70: 30
It is. If the ratio of the sulfur-containing reducing agent compound is too high than the above ratio, stability over time in body fluid is improved, but unpleasant odor is not reduced, which is not preferable. On the other hand, if the proportion of the composite silicate is too large, the gel aging stability is not improved, and this is out of the intention of the present invention.

<Composite silicate compound (C)> As the composite silicate compound used in the present invention, SiO ₂
It is contained in a composition ratio of ~ 80% by weight, and has any composition as long as it has a comprehensive deodorizing function against sulfur odors such as mercaptan, sulfur dioxide, hydrogen sulfide and the like, and furthermore, odors such as ammonia and methylamine. Complex silicates can also be used. When the composition ratio of SiO ₂ exceeds 80%, although the deodorization of ammonia is excellent, hydrogen sulfide, mercaptan,
Since it has no effect on sulfur-based malodorous components such as sulfur dioxide, it is out of the scope of the present invention. Further, when the composition ratio of SiO ₂ is less than 30%, it is not preferable because powder characteristics such as fluidity and hygroscopicity of the superabsorbent polymer may be deteriorated.

The oxide components other than SiO ₂ in the composite silicate compound include ZnO, Al ₂ O ₃ and Ag ₂ O.
And the like. Of these, ZnO and Al ₂ O ₃ are preferred in terms of deodorizing performance and hue of the silicate compound, and ZnO is most preferred. The average particle size of the composite silicate is preferably small, for example, 50 μm
Below, especially 10 μm or less is preferable because the surface area increases.

(2) Production of superabsorbent polymer composition The method for obtaining the superabsorbent polymer composition of the present invention is not particularly limited, and the above superabsorbent polymer may be added to the above sulfur-containing reducing agent and composite silica. It can be obtained by uniformly adding and dispersing or impregnating a predetermined amount of an acid salt. Addition and dispersion or impregnation can be performed by any conventionally known method or means, and a mixer generally used for powder mixing or solid-liquid mixing, for example, a tank-type mixer equipped with a stirring blade, a tumbling mixer It can be easily performed using a mixer, a fluid mixer, a gas mixer, a vibratory mixer, or a high-speed rotary paddle machine. Further, depending on the case, it may be added and dispersed or impregnated during the steps of polymerization, aging, dehydration, surface modification, granulation and the like of the superabsorbent polymer.

The solvent used for impregnation may be any of a polar solvent such as water and various alcohols or a non-polar solvent such as an aliphatic or alicyclic hydrocarbon, as long as the powder can be dissolved. Further, the sulfur-containing reducing agent and the composite silicate may be added and dispersed or impregnated in the superabsorbent polymer in the same step, or may be added and dispersed or impregnated in the polymer in separate steps. Furthermore, they may be mixed in a non-contact state with each other via another material such as a fiber base material.
The temperature for mixing or impregnating is generally from room temperature to 1
The temperature is 50 ° C, preferably room temperature to 50 ° C.

[0024]

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to Examples and Comparative Examples, but the present invention is not limited to these Examples unless it exceeds the gist thereof. The following characteristic values of the superabsorbent polymer obtained in the examples were measured by the following methods. (Water absorption capacity) About 0.5 g of a water-absorbing polymer was precisely weighed and placed in a 250-mesh nylon bag (20 cm × 10 cm size).
Immerse in 0 cc of artificial urine for 30 minutes. Thereafter, the nylon bag was pulled up, drained for 15 minutes, weighed, corrected for blank, and calculated water absorption capacity.

The composition of the artificial urine is as follows. Urea 1.94% Sodium chloride 0.80% Calcium chloride 0.06% Magnesium sulfate 0.11% Pure water 97.09%

<Sulfur Odor Test> A glass container having a capacity of about 500 ml was prepared, and 1 g of the superabsorbent polymer was placed at the bottom of the container, and artificial urine having the above composition was absorbed and sealed. After 10 minutes, the stopper was opened and the odor was measured. The measurement without the superabsorbent polymer as a blank was also performed. Considering the individual differences of the measurers, the evaluation was performed by five adults. The evaluation criteria adopted in this test are shown below. Evaluation stage No odor 0 Feel the sulfur odor 1 Feel the sulfur odor strongly 2 The deodorant effect was evaluated based on the average value of five adults.

<Gel aging stability test> 25 g of adult human urine (mixed with urine of 5 adults) was absorbed in 1 g of the superabsorbent polymer placed in a 50 ml plastic container, sealed and sealed, and then set to a temperature of 40 ° C. And left in a thermostat for 16 hours.
The swollen gel was taken out, and the stability was evaluated by touch and gel appearance. The scale of stability was the following three steps. …: The swollen particles have the same shape, and the touch is hard. Δ: Does not dissolve, but the shape of the swollen particles is unclear and the touch is soft. ×: Partial dissolution occurs, and a liquid state is observed. The touch is close to a viscous liquid.

<Test for deodorizing polymer powder> Capacity: about 500
Three ml glass containers were prepared, 1 g of the superabsorbent polymer was placed in each container, and a certain amount of a malodor-containing solution shown below was poured into each glass container, and the container was sealed and allowed to stand for 3 hours. . Three hours later, the malodor concentration was measured using a gas-tech detector tube for each malodorous substance. The measurement without the superabsorbent polymer as a blank was also performed. The composition / amount of the malodorous substance solution used and the detector tube used are shown below.

Target malodor solution composition / addition amount detection tube Ammonia 0.05 wt% ethanol solution 200 μl 3 L Methylamine 0.1 wt% aqueous solution 400 μl 180 t-butyl mercaptan 0.1 wt% aqueous solution 400 μl 70 L Shown in Target odor concentration (ppm) Ammonia 40 Methylamine 50 t-Butylmercaptan 5.0

<Gel Deodorization Test> The odor of the swollen gel used in the gel aging stability test was determined by the odor of five adults.
The evaluation criteria adopted in this test are shown below. The deodorizing effect was evaluated based on the average value of the evaluations of five persons. In the following Examples and Comparative Examples, the following superabsorbent polymers and composite silicates were used.

Superabsorbent polymer (a1) In a 5000 ml four-necked round bottom flask equipped with a stirrer, a reflux condenser, a temperature tube and a nitrogen gas inlet tube, 1210 g of cyclohexane was placed, and sorbitan monostearate 9 was added.
After adding g to dissolve, nitrogen gas was blown in to expel dissolved oxygen. Separately, 350 g of acrylic acid was dissolved in 727.7 g of water while externally cooling 350 g of acrylic acid in a beaker having a capacity of 2000 ml.
Was added to neutralize 70% of the carboxyl groups. In this case, the monomer concentration with respect to water corresponds to 35% by weight as the monomer concentration after neutralization. Then, N, N'-methylenebisacrylamide was added to the mixture.
After 37 g and 0.94 g of potassium persulfate were added and dissolved, nitrogen gas was blown in to expel dissolved oxygen. The contents of the four-necked round-bottomed flask are added to the volume of 2000 ml.
The contents of the beaker were added, and the mixture was stirred and dispersed, and the inside temperature of the flask was raised by an oil bath while bubbling nitrogen gas. After a sufficient time, the temperature reached 75 ° C. Then, after reacting for 3 hours while stirring, when the stirring was stopped, the wet polymer particles settled at the bottom of the round bottom flask, and thus could be easily separated from the cyclohexane phase by decantation.
The separated wet polymer was transferred to a reduced-pressure drier and heated to 90 ° C. to remove the attached cyclohexane and water. As a result, 400 g of a smooth superabsorbent polymer was obtained.

The thus obtained dried polymer 10
0 g was placed in a 500 ml eggplant-shaped flask, and then 122.5 g of cyclohexane was added to form a slurry. While stirring this slurry, a liquid in which 0.44 g of γ-glycidoxypropyltrimethoxysilane was dispersed in 22.5 g of water was added, and the mixture was stirred at room temperature for 30 minutes. Then, after being immersed in a 105 ° C. oil bath for 30 minutes, it was evaporated to dryness while maintaining the oil bath temperature to obtain 95 g of a dry polymer.

Superabsorbent polymer (a2) In the above superabsorbent polymer (A), 958 g of a dry polymer was prepared by using 0.8 g of ethylene glycol diglycidyl ether instead of γ-glycidoxypropyltrimethoxysilane. Obtained. Superabsorbent polymer (a3) A starch-acrylate graft copolymer cross-linked product (competitor A) was used.

Superabsorbent polymer (a4) A crosslinked product of polyacrylate (competitor B) was used. Superabsorbent polymer (a5) A crosslinked polyacrylate (competitor C) was used. Complex silicate (c1) Zinc aluminosilicate (trade name: Mizucanite HP, Mizusawa
Components manufactured by Chemical Industry Co., Ltd. when dried and their content: Si
O_Two 52% by weight, 38% by weight of ZnO, Al _Two O_Three 
10% by weight).

Composite silicate (c2) Compound of silicon dioxide, zinc oxide, aluminum oxide, and potassium persulfate (trade name: Mizucanite AP, manufactured by Mizusawa Chemical Industries, Ltd., component and content when dried: SiO ₂₎ 4
9.7% by weight, ZnO 36.3% by weight, Al ₂ O ₃
9.5% by weight, K ₂ S ₂ O ₈ 9.5% by weight). Composite silicate (c3) A mixture of silicon dioxide and zinc oxide (trade name: Shoe Lens KD-211S, manufactured by Lhasa Industry Co., Ltd., components and content when dried: 73.2% by weight of SiO ₂ , ZnO 2)
6.8% by weight).

Examples 1-34 A sulfur-containing reducing agent and a composite silicate were added to the superabsorbent polymers (a1) to (a5), and a V blender (S-5, manufactured by Tsutsui Rikakiki Co., Ltd.) was added. For 30 minutes at room temperature to obtain a superabsorbent polymer composition. The type and amount of the superabsorbent polymer, sulfur-containing reducing agent compound and composite silicate used are as shown in Table 1. The above measurement was performed on the obtained superabsorbent polymer composition. The results are shown in Table 2.

Comparative Examples 1 to 10 Highly water-absorbing polymer compositions obtained by adding only one of the sulfur-containing reducing agent compound and the composite silicate and mixing them in the same manner as in the above Examples The above measurement was performed on the superabsorbent polymer composition itself to which none of the above compounds was added. Table 1 shows the types and amounts of the superabsorbent polymer, sulfur-containing reducing agent compound and composite silicate used, and Table 2 shows the measurement results. As is clear from the results shown in Table 2, the superabsorbent polymer composition according to the present invention suppresses the sulfur odor generated from the sulfur-containing reducing agent without impairing the water absorption performance and the stability over time of the gel, and furthermore, It can be seen that in the body / gel state, the generation of malodorous substances due to body fluid can be caused.

[0038]

[Table 1]

[0039]

[Table 2]

[0040]

[Table 3]

[0041]

[Table 4]

[0042]

The superabsorbent polymer composition according to the present invention suppresses the sulfur odor generated from the sulfur-containing reducing agent without impairing the original water absorption performance of the superabsorbent polymer, and further suppresses the malodor caused by the body fluid. It turns out that it suppresses. Therefore, the superabsorbent polymer composition of the present invention can be particularly suitably used in the field of sanitary materials such as disposable diapers, sanitary napkins, and various pads.

Claims (7)

[Claims] 1. A superabsorbent polymer (A) having a crosslinked structure and containing a carboxyl group and / or a carboxylate group as a constituent of a polymer, (B) a sulfur-containing reducing agent, and (C) SiO ₂ Is contained in the range of 30 to 80% by weight, the total amount of (B) and (C) is 0.5 to 10 parts by weight based on 100 parts by weight of (A), and The mixing ratio of (B) and (C) is 9 by weight.
A superabsorbent polymer composition having a ratio of 0:10 to 10:90. 2. The superabsorbent polymer (A) is a crosslinked product of a polyacrylate, a crosslinked product of a starch-acrylic acid graft copolymer, a hydrolyzate of a crosslinked product of a starch-acrylonitrile graft copolymer, an acrylate ester The superabsorbent polymer according to claim 1, which is at least one selected from a hydrolyzate of a crosslinked product of a vinyl acetate copolymer, a crosslinked product of an acrylate-acrylamide copolymer and a hydrolyzed product of a crosslinked polyacrylonitrile. Composition. 3. The method of claim 1, wherein the sulfur-containing reducing agent is thiosulfate, sulfurous acid,
The superabsorbent polymer composition according to claim 1 or 2, which is at least one selected from sulfites, bisulfites, sulfides, hydrosulfides, and mercaptans. 4. The method of claim 1, wherein the sulfur-containing reducing agent is thiosulfate, sulfurous acid,
The superabsorbent polymer composition according to claim 1, which is at least one selected from sulfites and hydrogen sulfite. 5. The composite silicate compound having a composition ratio of SiO 2
₂ 30-80 _{wt%, Al 2 O 3, ZnO} , Ag 2 O
At least one metal oxide selected from the group of
The superabsorbent polymer composition according to any one of claims 1 to 4, which is 70% by weight. 6. The composition ratio of the composite silicate compound is SiO 2
₂ 30-80 wt%, Al ₂ O ₃ and / or superabsorbent polymer composition according to any one of claims 1 to 4 ZnO is 20 to 70 wt%. 7. The composition ratio of the composite silicate compound is SiO.
5. The superabsorbent polymer composition according to claim 1, wherein ₂ is 30 to 80% by weight and ZnO is 20 to 70% by weight.