TW419382B - Absorbing agent, method of manufacturing same and absorbent product containing same - Google Patents

Abstract

A water absorbent having a diffusion/absorption capacity of at least 25 g/g sixty minutes after starting absorption and a water-solubles content of more than 0 to 7 wt.%. It is produced by conducting an aqueous solution polymerization of a hydrophilic unsaturated monomer mainly comprising acrylic acid at least 50 mole% of which has been neutralized, followed by surface cross-linking of the obtained water absorbent precursor under specified conditions in the presence of a dispersant and a cross-linking agent comprising a specified principal cross-linking component comprising an ester of a specified polyhydric alcohol with a specified unsaturated carboxylic acid and a high-boiling component having at least two skeletons of the above alcohol in its molecule. The obtained water absorbent has a high diffusion/absorption capacity and a low water-solubles content, is reduced in the release of the absorbed aqueous liquid after the lapse of time, and retains a very high capability of liquied diffusion and a stable capacity of water absorption for long.

Description

419382 A7 B7 V. Description of the invention (Printed by the Central Bureau of Standards, Ministry of Economic Affairs, Shellfish Consumer Cooperatives) TECHNICAL FIELD The present invention relates to sanitary materials suitable for use in so-called incontinence pads such as disposable diapers (diapers that have been used up) and sanitary napkins. Water absorbent, its manufacturing method, and absorbent articles containing water absorbent. In the past, in recent years, water absorbent resins for the purpose of absorbing body fluids have been widely used as constituent materials of sanitary materials such as incontinence pads such as paper diapers and sanitary napkins. The above-mentioned water-absorbent resins that are known to be used include, for example, polyacrylic acid partially neutralized bridge members (Japanese Patent Publication No. Sho 5_5.-84304, JP Sho 55-108407, and JP 55-133413), Palace powder-hydrolysate of Gumbo Graft Polymer (Japanese Patent Gazette No. 46-43995), starch-acrylic acid graft polymer neutralized product (Japanese Patent Gazette No. 5-1-1 2 5 46 No. 8), a test compound of an ethyl acetate-acrylate copolymer (Japanese Patent Gazette No. 52-14689), a hydrolysate of an acrylonitrile copolymer or an acrylamide copolymer (referred to as this patent publication Japanese Patent Application Laid-Open No. 53-1 59 5 9) or a bridging agent of its cationic monomer (Japanese Patent Publication No. 58 154709, Japanese Patent Laid-Open No. 58-1547) and the like. The characteristics required are: excellent water absorption or water absorption speed when in contact with aqueous liquids such as body fluids, gel strength, and the suction force for absorbing water from materials containing aqueous liquids. In the past, several such absorption characteristics were simultaneously available. A variety of the specific properties of the garden, and when used in sanitary materials such as paper diapers or sanitary napkins, the water-absorbent resin or the absorbent body or absorbent article using the water-absorbent resin is raised-4 This paper size applies to China National Standard (CNS) A4 (210X297). Please read the note I. Order. 419382 A7 B7 5. Invention Description (2) Printed out by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. For example A water-absorbent resin combining specific gel capacity, shear e 1 as ticity, and extractable polymer content (US Patent No. 4,6 5 4,03 9); Water-absorbent resin with a water absorption rate, gel strength, and a paper diaper or sanitary napkin using the water-absorbent resin (Japanese Patent Publication No. Sho 60-185550, JP Sho 60-18555 No. 1, JP Sho 60- 185804); a paper diaper using a water-absorbent resin having a specific water absorption amount, speed and gel stability (Japanese Patent Gazette No. 60-1185805); equipped with a specific water absorption amount, attractiveness and A water-absorbent article of a water-absorbent resin having a water-soluble content (Japanese Patent Laid-Open No. 63-21902), a water-absorbent resin containing a water-absorbent resin having a specific water-absorption amount, water absorption under pressure, and gel breaking strength Sanitary products (Japanese Patent Publication No. 63-99861); diapers containing a water-absorbent resin having a specific water absorption rate and water absorption rate under pressure (Japanese Patent Publication No. Hei 2-34167); Water absorbent for water-absorbent resin with specific water absorption and particle size under pressure (European Patent No. 3 3 9,46 1); water absorption of water-absorbent resin with deformation and absorption index under a specific load containing a specific amount or more Health Compound Material (European Patent No. 532,002) and the like. On the other hand, hygienic materials such as paper diapers and sanitary napkins are becoming more functional and thinner. The amount of water-absorbent resin used in a piece of sanitary material or the water-absorbency in an absorbent body mainly composed of water-absorbent resin and hydrophilic fibers The weight% of resin (hereinafter referred to as resin concentration) tends to increase. That is, reducing hydrophilic fibers with a small bulk relative density and increasing water-absorbent resins having excellent water absorption and high bulk specific gravity to increase the ratio of the water-absorbent resin in the absorbent body, thereby pursuing the goal of not reducing the water absorption. The thinning of sanitary materials is suitable for China National Standards (CNS) Λ4 specifications (210X297 mm) (Please read the precautions on the back before filling this page) Order one. ΛΓ 419382 A7 B7 V. Description of the invention (3 Printed by the Consumer Standards Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. However, the inventors of this case conducted various studies to increase the resin concentration in the absorbent body in order to increase the water absorption of sanitary materials. In the past, the problem of the absorbent body and the prevention of leakage of aqueous liquid from sanitary materials, it is not enough to control the above-mentioned water absorption, water absorption speed, gel strength, attractiveness, etc. For example, in recent years, it has only attracted attention. In a water-absorbent resin that has a very large water absorption under pressure, if the resin concentration is increased, the liquid diffusivity in the absorbent will be extremely low. In addition, the inventors of this case focused on the water absorption characteristics of resins with higher concentrations than conventional absorbents. As a result of various studies, they found that if a mixture of a conventional water-absorbent resin and hydrophilic fibers is used as the absorber, When the resin concentration is low, although it exhibits a certain degree of water absorption characteristics, after the resin concentration exceeds 40% by weight, the liquid diffusivity rapidly decreases, the water absorption per unit weight of the absorber is low, and the water absorption after a long time Phenomenon that the capacity is reduced and the return flow of the aqueous liquid is increased. That is, if a conventional mixture of a water-absorbent resin and a hydrophilic fiber is used, the above-mentioned problems occur. Therefore, an object of the present invention is to solve the above-mentioned problems, and provide, for example, A hygroscopic agent and its manufacturing method that are hardly affected by resin concentration or the structure of the absorbent body, have very high diffusivity at any time, and maintain stable water absorption for a long period of time (hygroscopic properties), And an absorbent article containing the water absorbing agent. Another object of the present invention is to provide For hygienic materials, etc., water-absorbing agents with excellent properties such as high liquid diffusivity and water absorption can be maintained at any time even if the resin concentration is increased. Please read the precautions on the back again. National Standard (CNS) A4 specification (210X297 mm) 4133 82 at B7 V. Description of the invention (4), absorber and absorbent article. Disclosure of the Invention In order to achieve the above purpose, the inventor of the present invention aimed at a water-absorbing agent, a manufacturing method thereof, and After intensive research on absorbent articles containing the water-absorbing agent, it was found that the use of a specific amount of a bridging agent of a specific composition, in the presence of the bridging agent and dispersant, was 50 mol. The hydrophilic unsaturated monomer with acrylic acid as the main component is polymerized in an aqueous solution to synthesize a water-absorbing agent precursor. After adjusting the water content and particle size of the water-absorbing agent precursor to a specific range, it is performed in the presence of a surface bridging agent. The water-absorbing agent prepared by the heat-treating manufacturing method has excellent properties (water-absorbing properties) that the conventional water-absorbing resins do not have. That is, even when the amount of the water-absorbent resin is large or the resin concentration in the absorbent body is high, it has almost no influence on the structure of the absorbent body, has a very high diffusivity, and maintains a stable water absorption amount for a long time. Excellent performance. It was also found that a water-absorbing agent (a water-absorbing agent-containing absorbent and absorbent) prepared by a method for synthesizing a specific water-absorbing agent precursor and heating-treating the water-absorbing agent precursor in the presence of a specific surface bridging agent The same is true for articles) when the amount of the water-absorbent resin is large or when the resin concentration is high, the liquid diffusivity is very high and the water absorption capacity is maintained, and the present invention has been completed. Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling out this page). That is, in order to solve the above problems, the water-absorbing agent of the present invention is characterized by its diffusion after 60 minutes from the start of absorption. The absorption ratio is 25 g / g or more. In order to solve the above problems, the absorbent body of the present invention is characterized by containing the water-absorbing agent in an amount of 40% by weight or more. In addition, in order to solve the above problems, the characteristics of the absorbent article of the present invention-7- This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) A7 B7 V. Description of the invention (5) Central Bureau of Standards, Ministry of Economic Affairs Printed by the Employee Consumption Cooperative (419382 is an absorber having a diffusion absorption rate of 25 g / g or more after 60 minutes from the start of absorption and having a water-absorbing agent with water-soluble content of 0 to 7 wt%. Details are described below. The present invention The so-called expanded absorption ratio in the present invention refers to the evaluation of the diffusivity of an aqueous liquid in a state where the weight of the water-absorbent resin per unit area is high and the resin particles are in close contact with each other due to external forces. Novel properties of water absorption of water absorbent or absorbent. The above-mentioned diffusion absorption ratio is after a certain period of time has elapsed from the start of absorption under certain measurement conditions (for example, after 20 minutes, after 30 minutes, after 60 minutes) The measurement method is calculated by the calculation method. The method of measuring the diffusion absorption ratio will be described in detail in the examples in the following paragraphs. With the diffusion absorption ratio, it is possible to evaluate the water absorbent or absorbent. (That is, the water-absorbent resin), a new feature "that is, by using the diffusion absorption ratio, it is possible to evaluate to what extent the water-absorbent resin can uniformly and rapidly diffuse the aqueous liquid in the direction of the resin layer (hereinafter referred to as the horizontal direction), and the overall actual performance of the water-absorbent resin What is the amount of water absorption? The liquid diffusivity (liquid diffusing ability and liquid transmitting ability) of the aqueous liquid in the horizontal direction is an important factor for the large absorption of the aqueous liquid. From the results of the above evaluation, it can be simply predicted For example, an absorbent body mainly composed of a water-absorbent (water-absorbent resin) and hydrophilic fibers, and particularly a water-absorbent resin in an absorbent body having a high weight% (hereinafter referred to as resin concentration) of the water-absorbent resin. The structure of the body will be described later. Also, in the above-mentioned previous applications, many documents for evaluating the amount of water absorption under pressure can be seen. However, in the past, the amount of water absorption was evaluated only in a direction perpendicular to the resin layer (hereinafter referred to as Vertical direction). Therefore, the water-based liquid is in the horizontal square -8-This paper size applies the Chinese national standard (CNS grid (21GX297) Chu) (Please read the notes on the back before filling in this page)

4193k A7 B7 V. Description of the invention (6) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs How to spread rapidly upward has hardly been evaluated. Therefore, it is impossible to accurately predict, for example, the water absorption characteristics of the absorbent body in a paper diaper or the like using an absorbent body having a high resin concentration from the conventional evaluation results. The amount of the water-soluble component in the present invention is a physical property that evaluates the re-diffusibility of the water-absorbent resin with excellent diffusion absorption rate over a long period of time or the ability of the water-absorbent resin to retain the liquid-phase over a long period of time after water absorption. The amount of the water-soluble component is measured under a certain condition. The method for measuring the amount of water-soluble components is described in detail in the examples in the following paragraphs. A water-absorbent resin having a diffusion absorption ratio within the range of the present invention but having a water-soluble content outside the scope of the present invention tends to increase the amount of the aqueous liquid return after a long period of time. In contrast, the water-absorbing agent (that is, the water-absorbing resin) of the present invention satisfies the two physical properties 扩散 of the above-mentioned diffusion absorption ratio and water-soluble content, and therefore has excellent performance. First, a water-absorbing agent having almost no influence on resin concentration or the structure of an absorbent body, and having excellent properties (water absorption characteristics) such as long-term liquid diffusivity and stable water absorption over a long period of time, a method for manufacturing the same, and a method containing the same Absorbent article. The diffusion absorption ratio of the water-absorbing agent of the present invention is 25 g / g or more, and the amount of water-soluble components is 7% by weight or less. A water-absorbing agent having a diffusion absorption rate of less than 25 g / g (that is, a water-absorbing resin) has poor lateral liquid diffusivity in an absorbent body with a high resin concentration (high concentration), and the absorbent body has a small absorption capacity. The diffusion absorption ratio is preferably 28 g / g or more, more preferably 30 g / g or more, and most preferably 32 g / g or more. In addition, even if the diffusion absorption rate is above 25g / g, and the water-soluble content of the water-absorbent resin exceeds 7% by weight, the aqueous liquid after a long period of time (please read the precautions on the back before filling in this page) Order 0. JR 1-9- This paper size applies Chinese National Standard (CNS) A4 (210X297 mm) A7 B7 Printed by the Central Standards Bureau of the Ministry of Economic Affairs and printed by the Consumers' Cooperative 419382 5. Description of the invention (Sometimes the return flow will be more. Water can be The amount of the soluble component is preferably 5 wt./% or less. More preferably, it is 3 wt% or less. In the present invention, the diffusion absorption rate is defined as the measurement under a certain measurement condition after the start of absorption, for example, 60 minutes. However, in addition to the above-mentioned diffusion absorption ratio, a water-absorbing agent having a diffusion absorption ratio of i 5 g / g or more calculated from a measurement 20 minutes after the start of absorption is preferable, and a water-absorbing agent having 20 g / g or more is more preferable. The absorbent article of the present invention is characterized in that it contains a water-absorbing agent having the above-mentioned excellent characteristics as an absorbent body, but the absorbent body may contain necessary hydrophilic fibers in addition to the water-absorbing agent. In the case of hydrophilic fibers, the structure of the absorbent body may be, for example, a structure in which a water-absorbing agent and a hydrophilic fiber are uniformly mixed, a structure in which a water-absorbing agent is sandwiched between layered hydrophilic fibers, and a water-absorbing agent and hydrophilicity. The fibers are uniformly mixed to form a layered structure and a layered layer of hydrophilic fibers is laminated thereon. A water-absorbing agent and a hydrophilic fiber are evenly mixed to form a layered structure and then sandwiched between the layered and the layered hydrophilic fibers. Structure of water-absorbing agent, etc. Furthermore, a specific amount of water may be added to the water-absorbing agent to form a sheet-like structure of the water-absorbing agent. In addition, the structure of the absorbent body is not limited to the structure exemplified above. The hydrophilic fiber described above It can be, for example, mechanical surface pulp, chemical pulp, semi-chemical pulp, dissolving pulp and other fiber surface fibers and concrete, acetic acid + artificial cellulose fibers, etc. obtained from wood. Among the fibers exemplified above, cellulose fibers are preferred. In addition, the hydrophilic fiber may contain synthetic fibers such as polyamide, polyester, and polyolefin smoke. "Hydrophilic fibers are not limited to the fibers exemplified above. In order for the water-absorbing agent of the present invention to have With different characteristics, the ratio of hydrophilic fibers in the absorbent body is preferably above 0 and 60% by weight. /, Below, more preferably -10- Table paper size applies Chinese National Standard (CNS) A4 specification (210X2.97) (Mm) (Please read the notes on the back before writing this page)

. " 4193 82 at _______ B7 Printed by Zhengong Consumer Cooperative, Central Bureau of the Ministry of Economic Affairs. 5. Description of invention (8) 20 weight. /. Above and below 40% by weight. In addition, although the higher the resin concentration in the absorbent body, the characteristics of the absorbent or the absorbent body of the present invention can be exhibited, but the water absorbent of the present invention can fully exert its properties regardless of the proportion of hydrophilic fibers in the absorbent body. performance. In addition, the properties of the water-absorbing agent are hardly affected by the structure of the absorbent body. When the proportion of the hydrophilic fibers in the absorbent body is small, an adhesive may be used to adhere the absorbent body (that is, the hydrophilic fibers). Subsequent to the hydrophilic fiber, the strength and shape retention of the absorbent body before or during use can be improved. Examples of the above-mentioned adhesive binder include thermally fused fibers such as polyethylene, polypropylene, ethylene-propylene copolymer, and poly-associated hydrocarbon fibers such as 1-butadiene-ethylene copolymer, and milky adhesive having adhesiveness. These adhesives may be used alone or in combination of two or more. The weight of hydrophilic fiber and adhesive binder is better in the range of 50/50 ~ 99/1, more preferably in the range of 70/30 ~ 95/5, and even more preferably in the range of 80/2 0 ~ 95 / Within the range of 5. The water-absorbing agent of the present invention uses a specific amount of a bridging agent with a specific composition. In the presence of the bridging agent and the dispersant, the hydrophilicity of the acrylic acid whose main component is neutralized by 50 mol% or more is not hydrophilic. Saturated monomers are polymerized in aqueous solution, the water content and particle size of the prepared water-absorbing agent precursor are adjusted to a specific range, and the manufacturing method of heating the water-absorbing agent precursor in the presence of a surface bridging agent is be made of. The main components of the hydrophilic unsaturated monomer in the present invention are acrylic acid and its neutralized product. In order to improve the water-absorbing properties of the water-absorbing agent, 50 mol% or more of acrylic acid is preferably neutralized with, for example, a metal salt, a qian · salt, or an amine salt. In addition, for the purpose of -11-this paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) I .------ 17 ^ " '装 — I Γ. (Please read the note on the back first Please fill in this page again)-Order 419382 A7 ___ ^ ____ B7 V. Description of the invention (9) Printed by the Central Standards Bureau of the Ministry of Economic Affairs, Shelley Consumer Cooperative, printed a step to improve the water absorption properties of the water absorbent, 65 mol% to 80 mol of acrylic. / 〇 It is better to be neutralized. The above-mentioned hydrophilic unsaturated monomer may contain a monomer having a propionic acid or higher if necessary. The monomer other than acrylic acid is not particularly limited, and specifically, it may be methacrylic acid, maleic acid, ethylene sulfonic acid, phenethyl sulfonic acid, 2- (meth) propanthine ethylsulfonic acid, 2- (Meth) propanyl propyl sulfonic acid and other anionic unsaturated monomers and their salts; propyl amine, propyl acrylamide, N-ethyl (meth) propyl amine, N'-propyl (Meth) acrylamide, N-isopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, 2-Ethyl (meth) acrylate, 2- Non-ionic such as propyl (meth) acrylate, methoxypolyethylene glycol (meth) propionate, polyethylene glycol (meth) acrylate, vinylpyridine, N-propenylpyrrolidine Hydrophilic unsaturated monomers; N, N-dimethylaminoethyl (meth) propionate, ν, N-diethylaminoethyl (fluorenyl) acrylate, N, N -Cationic surfactants such as diamidoaminopropyl (meth) acrylate, N, N-dimethylaminoethyl (meth) acrylate and its quaternary salts. When using these other unsaturated monomers, the amount is preferably 50 mol% or less relative to the total amount of acrylic acid and its neutrals as the main components. The bridging agent in the present invention is a trivalent or higher alcohol (hereinafter referred to as trivalent or higher) among unsaturated carboxylic acid esters including acrylates having plural functional groups (hereinafter referred to as multifunctional). An alcohol) and an unsaturated carboxylic acid esterification reaction or a trivalent or higher alcohol and an unsaturated carboxylic acid ester exchange reaction. However, at present, it is difficult to obtain all the hydrofluorenyl groups of the above-mentioned trivalent alcohols with high selectivity and high yields at low cost on an industrial scale, and the unsaturated groups are not included.-'I-. (Please read the back first Please note, also write this page) r Order-Γ -12- CNS) A4 specification (210X2.97 mm) Γ 419382 Α7 Β7 V. Description of the invention (10) Employees' cooperatives in the Central Standards Bureau of the Ministry of Economic Affairs printed acid printing Ester-bonded unsaturated carboxylic acid esters (ie, the desired unsaturated carboxylic acid esters). In addition, although the reaction conditions are different, if the above unsaturated carboxylic acid esters are synthesized on an industrial scale, a large number of high-boiling components containing the alcohol skeleton in the molecule will be generated in large quantities, replacing the desired unsaturated carboxylic acid. Acid ester. Therefore, in order to use industrially available unsaturated carboxylic acid esters, that is, unsaturated carboxylic acid esters containing the high boiling point component as a bridging agent, the hydrophilic unsaturated monomers are polymerized in an aqueous solution to obtain A super absorbent resin with high performance, and is dedicated to research. As a result, it was found that when the aqueous solution is polymerized with unsaturated carboxylic acid esters containing the high boiling point component, it is difficult to increase the diffusion absorption ratio of the water-absorbing agent, and it is also difficult to reduce the amount of water-soluble components. Therefore, in order to obtain a water-absorbent resin (that is, a water-absorbing agent) having excellent properties such as diffusion absorption rate and liquid diffusivity, and having a reduced amount of water-soluble components, research is being conducted. It was found that only in the presence of a dispersant, a bridging agent containing a specific amount of a high boiling point component within a specific range can obtain a water-absorbent agent having a significantly reduced water-soluble content and a superior diffusion absorption rate. That is, the bridging agent used in the present invention is composed of an esterified product of a trivalent or higher alcohol having an atomic number of 6 or less and an unsaturated carboxylic acid, and all the hydroxyl groups of the trivalent or higher alcohol are all When the molecular weight of the unsaturated carboxylic acid ester-forming compound is 1, the main component of the bridging agent whose ratio to the molecular weight of the compound is in the range of 0.7 or more and 1.3 or less, and the above-mentioned alcohol skeleton is contained in the molecule 2 It is composed of the above high boiling point components, and the weight ratio of the main component of the bridging agent to the high boiling point component is in the range of 75/2 5 to 99/1. The trivalent or higher alcohols that can be used in preparing the bridging agent of the present invention are not particularly limited, but glycerol, trimethylolethane, tetramethylolethane, and trihydroxyol are preferred (please read the precautions on the back first) (Fill in this page) This paper size is in accordance with Chinese National Standard (CNS) A4 (2I0X297mm) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs f 4193 82 A7 B7 V. Description of the invention (11) Jiyiyuan, pentaerythritol, etc. Among them, methyl terephthalate is particularly preferred. Further, the unsaturated carboxylic acid usable in the preparation of the bridging agent may be a hydrophilic unsaturated monomer having the above carboxyl group, and acrylic acid is particularly preferred. As described above, the main component of the bridging agent may be all the hydrogens of the polyfunctional unsaturated acetic acid esters using the above-mentioned trivalent or higher alcohol as the alcohol component and the unsaturated polyacid as the acid component. When the molecular weight of the compound in which the oxy group and the unsaturated carboxylic acid form an ester bond is 1, the compound having a molecular weight ratio of this compound in the range of 0: 7 or more and 1.3 or less. For example, the main component of the bridging agent when trihydroxymethylpropane is a trivalent or higher alcohol and acrylic acid is an unsaturated polyacid may be trimethylolpropane triacrylate, trimethylolpropane diacrylate, or trimethylolpropane diacrylate. Methylolpropane acrylate mono (β-propenyloxypropionate) and the like. Further, for example, when glycerin is a trivalent or higher alcohol 'and acrylic acid is an unsaturated carboxylic acid, the main component of the bridging agent may be glycerol-acrylic acid, glycerol, di-acrylic acid, and the like. The main component of the bridging agent when trimethylsulfonyl ethyl alcohol is used as a trivalent or higher alcohol, and when acrylic acid is an unsaturated carboxylic acid, may be trimethyl methyl ethyl tripropionate and trichimethyl ethyl diacetate. Esters, etc. The main component of the bridging agent when tetrahydroxymethylethane is a trivalent or higher alcohol and acrylic acid is an unsaturated carboxylic acid may be tetramethylolethane tetraacrylate, tetramethylolethane triacrylate, etc. . The main component of the bridging agent when tetrahydroxyethane is a trivalent or higher alcohol 'and propionic acid is an unsaturated carboxylic acid may be tetramethylethane tetraacrylate, tetrahydroxyethane triacrylate, or the like. Pentaerythritol is a trivalent or higher alcohol, and the main component of bridging agent when propionic acid is an unsaturated polyacid can be pentaerythritol tetrapropionic acid, pentaerythritol tripropionate, etc. -14- This paper applies to China Standard (CNS) A4 specification (210X297 mm) (Please read the notes on the back before filling in this page)

A7 B7 4193 82 V. Description of the invention (l2) The structure containing the high boiling point component of the bridging agent is complicated, and it is a compound obtained as a by-product when the main component of the bridging agent is synthesized. For example, the tribomethyl alcohol is a trivalent or more alcohol, and the high boiling point component when acrylic acid is an unsaturated carboxylic acid may be a condensate containing two or more trimethylolpropane skeletons in the molecule. Trimethylolpropane triacrylate and trimethylolpropane; compounds produced by the addition reaction of fe diacrylate, trimethylolpropane diacrylate ditrimer, trihydroxymethylpropane diacrylate and The addition of trimethylolpropane monoacrylate should be the compound produced. The weight ratio of the main component of the bridging agent to the high boiling point component in the bridging agent must be in the range of 75/25 to 99/1, and preferably in the range of 80/20 to 90/10. When the weight ratio of the main component of the bridging agent to the high boiling point component in the bridging agent is less than 75/25, that is, the proportion of the main component of the bridging agent to the total amount of the main component of the bridging agent and the high boiling point component is less than 75% by weight (ie, high When the proportion of the boiling point component exceeds 25% by weight), even if the dispersant of the present invention is used, it is not possible to obtain a water-absorbing agent which is excellent in diffusion absorption rate or liquid diffusibility and has a reduced amount of water-soluble components. A bridging agent with a weight ratio of 99/1 to the high boiling point component, that is, the ratio of the main component of the bridging agent to the total amount of the main component of the bridging agent and the high boiling point component is greater than 99% by weight (that is, the proportion of the high boiling point component is less than 1% by weight) The bridging agent is not easy to obtain in industry, so it is not suitable. Also, that is, the proportion of the main component of the bridging agent is more than 99% by weight. /. The ratio of the bridging agent ′ to the main component of the bridging agent is 75 weight. /. ~ 9 9 weight. /. Compared with the situation, it also has no significant effect. The amount of the bridging agent is in the range of 0.05 mol% or more and 0.5 mol% or less relative to the hydrophilic unsaturated monomer. 'Preferably 0.07 mol% or more and 〇2 -15. National Standards of China (CNS) Regulation 8 (210X297mm) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 4193 82 at ------- B7 V. Description of Invention (l3) Fan Yuan. When the amount of the bridging agent is less than 0.5 mol% and more than 0.5 mol%, the diffusion absorption ratio of the water absorbing agent will be reduced, and the water soluble content will increase, so it is not suitable. In addition, the amount of the bridging agent may be based on all of the trivalent or higher alcohols in the unsaturated tribasic acid esters of the unsaturated tribasic acid esters with an unsaturated carboxylic acid as the acid component. The molecular weight of the compound whose hydroxyl group forms an ester bond with the unsaturated carboxylic acid (ie, the main component of the bridging agent) is calculated. The dispersant used in the polymerization of the aqueous solution in the present invention is preferably a compound which can interact with the bridging agent; 4 and a compound which can be uniformly dissolved in water, and is generally available in the industry. The dispersant may be, for example, a sorbitan fatty acid ester, a polyoxyethylene sorbitan fatty acid ester, a polyglycerol fatty acid ester, a polyoxyethylene alkyl ether, a polyoxyethylene alkylphenol ether, or a polyoxyethylene fluorene. Ethers, sucrose fatty acid esters and other nonionic surfactants; higher alcohol sulfates, alkyl tea sulfonates, alkyl polyoxyethylene sulfates, dialkyl sulfosuccinates and other anionic interface activities Agents; cation-active surfactants such as alkyl fourth ammonium salts, alkylamine salts, and other amphoteric surfactants such as beet-based beet face and egg scale lipids; lipophilic polymers with carboxyl groups and partially fluorinated polyethylene glycols Polymer compounds such as alcohols, methyl cellulose, cumyl methyl cellulose, and hydroxyethyl cellulose. Among the above-mentioned dispersants, a water-soluble surfactant and a water-dispersible surfactant are preferred, and a non-ionic surfactant with a hydrophilic-lipophilic balance (HLB: 10 or more) is preferred. . The amount of the dispersant is preferably within a range of 1% to 100% by weight, and more preferably within a range of 5% to 50% by weight, relative to the bridging agent. In addition, the amount of dispersant is relative to the water-absorbent precursor from self-hydrophilic unsaturated monomer -16- This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) Again **: Write this page)

82 4 82 4 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (14) The unit weight of 100 is more than 0.005 unit weight and less than 0.5 unit weight. The mixing method (addition method) of the dispersant at the time of aqueous solution polymerization is not particularly limited. For example, after the bridging agent and the dispersant are directly mixed, the mixed solution may be mixed with a hydrophilic unsaturated monomer or an aqueous solution thereof. Alternatively, after the bridging agent is mixed with a dispersant or an aqueous solution of a dispersant, the mixed solution may be mixed with a hydrophilic unsaturated monomer or an aqueous solution thereof. Alternatively, after the bridging agent and the dispersant are mixed with the hydrophilic unsaturated monomer or a part of its aqueous solution, the mixed solution may be mixed with the remaining part of the hydrophilic unsaturated monomer or its aqueous solution. Alternatively, after the aqueous solution of the bridging agent, dispersant, or dispersant is mixed with the hydrophilic unsaturated monomer or a part of the aqueous solution, the mixed solution may be mixed with the remainder of the hydrophilic unsaturated monomer or the aqueous solution thereof. In the above mixing method, after the bridging agent, the dispersing sword and a portion of the hydrophilic unsaturated monomer or an aqueous solution thereof are mixed, the method of mixing the mixed solution with the remaining portion of the hydrophilic unsaturated monomer or its aqueous solution is compared. good. After mixing the bridging agent and the dispersant with the propionic acid as the hydrophilic unsaturated monomer, the mixed solution is mixed with the hydrophilic unsaturated monomer or the remainder of the aqueous solution (ie, the acrylic acid neutralizer). Etc.) The mixing method is better. When the hydrophilic unsaturated monomer is subjected to aqueous solution polymerization in the presence of a bridging agent and a dispersant, the concentration of the hydrophilic unsaturated monomer in the aqueous solution is preferably 25% by weight or more and a saturated concentration by weight. /. Hereinafter, it is more preferably 30% by weight or more and 45% by weight or less. In addition, at the beginning of the polymerization in the above-mentioned polymerization reaction, for example, potassium persulfate, persulfate, sodium persulfate, t-butyl hydroperoxide, hydrogen peroxide can be used. CNS > A4 size (210X297 mm) (Please read the precautions on the back before ^: write this page)

4 193 8〇Q Α7 __ Β7 V. Description of the invention (15) Printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs, and a radical polymerization initiator such as 2,2-azo (2-amidinopropane) dihydrochloride, Or active energy rays such as ultraviolet rays or electron rays. When an oxidative radical polymerization initiator is used, redox polymerization may be carried out by using a reducing agent such as sodium sulfite, sodium bisulfite, iron sulfate, or L-ascorbic acid in combination. The amount of these polymerization initiators is preferably in the range of from 0.001 mol% to 2 mol%, and more preferably in the range of 0.01 mol% to 0-5 mol%. In addition, the water-absorbing agent of the present invention is an operation such as classifying a water-absorbing agent precursor obtained by polymerizing the above-mentioned aqueous solution to adjust the water content to 10% or less, and the average particle size is within a range of 200 μm to 600 μm. After the ratio of particles having a diameter of 106 μm or less is 10 weight ❶ / 0 or less, the water-absorbing agent precursor is obtained by heating treatment in the presence of a surface bridging agent. The above-mentioned water-absorbing agent precursor can be granulated into a desired shape, for example, various shapes such as a spherical shape, a scaly shape, an irregularly broken shape, and a granular shape. In addition, the precursor of the water-absorbing agent may be a granule of primary particles or a granule of secondary particles. In addition, when the moisture content is higher than 10%, when the average particle diameter is outside the range of 200 μm to 600 μm, or when the proportion of particles with a particle diameter of 106 μm or less exceeds 10% by weight, It is not suitable to obtain a water-absorbing agent with excellent performance such as diffusion absorption rate. The surface bridging agent in the present invention is preferably a compound capable of reacting with several groups or a conventional surface bridging agent commonly used for this purpose. The surface bridging agent may be, for example, ethylene glycol, diethylene glycol, propylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, propylene glycol, 1,3-propanediol, dipropylene glycol, 2,2,4- Trimethyl-1,3-pentanediol, polypropylene glycol, glycerol, polyglycerol, 2-butane-1,4-diol, 1,4-butanediol, 1,5-butanediol, 1, 6-Hexanediol, 1,2-cyclohexyl dimethanol, 1,2-cyclohexanol, tri-methyl propylene, diethanolamine, tri-18-This paper size applies to Chinese National Standard (CNS) A4 specifications 210X297 mm) (Please read the notes on the back before filling in this page)

Order 419382 A7 __B7 V. Description of the invention (16) Ethanolamine, polyoxypropylene, oxyacetamyl-oxypropylene block copolymer, pentaerythritol, sorbitol and other divalent alcohol compounds such as ethylene glycol diglycidyl acid, Polyethylene glycol-glycidic acid, glycerol polyglycidol, diglycerol polyglycidyl ether, polyglycerol polyglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, sugar alcohol and other epoxy compounds; Polyvalent amine compounds such as amine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, and polyethyleneimine; polyvalent compounds such as 2,4-methylbenzyl diisocyanate and hexamethylene diisocyanate Isocyanates; Polyvalent compounds such as ethylene dioxazoline; 1,3-dioxolane-2-one; 4-methyl-1,3-dioxolane Cyclo-2-one, 4,5-dimethyl-1,3-dioxolane_2 monoone, 4,4-dimethyl-1,3-dioxolane-2-one, 4-ethyl-i, 3_dioxolane-2-one, 4-hydroxymethyl-1,3-dioxolane-2-one ,: 1,3_dioxane-2-one , 4-methyl-1,3-dioxan-2-one, 4,6-dimethyl-1,3-di Alkyl carbonate compounds such as oxan-2-one, 1,3-dioxopropan-2-one; epoxy epoxy compounds such as epichlorohydrin, epibromopropane, and α-methyl epichloropropane; γ -Cyclopropoxypropyltrimethoxy; 5'-yaki, γ-aminopropyl-methoxy phenyl pits and other silicon 'look coupling agents; Ci, bow, Qian'ming, iron, wrong, etc. hydroxide Or gaseous compounds such as polyvalent metals. These surface bridging agents may be used alone or in combination of two or more. In particular, when the surface bridging agent is a mixture of the first surface bridging agent and the second surface bridging agent with different solubility factors (83? 値), a water-absorbing agent having a better diffusion absorption rate can be obtained. In addition, the above-mentioned solubility factor is one of factors commonly used to indicate the polarity of a compound. In the present invention, the Polymer Handbook 3rd Edition (issued by WILEY INTERSCIENCE) Pages 527 to 539 -19-This paper size applies to China National Standard (CNS) A4 (210X297 mm)

Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (Please read the precautions on the back before filling this page)

4193 82 at __ ^ __ B7 V. The solubility of the solvent described in the description of the invention (Π) is given by S (cal / cin3) i / 2. It is applicable to the above solubility factor. In addition, the "solubility factor of a solvent not described in the above page" can be derived by substituting Hoy's agglomeration energy constant described in page 525 of the polymer handbook into the formula of Small on page 524 thereof. The first surface bridging agent is preferably a compound capable of reacting with a carboxyl group and having a solubility factor of 12.5 (cal / cm3) i / 2 or more, and more preferably a compound of 13.0 (cal / cm3) 1/2 or more. The first surface bridging agent may be, for example, ethylene glycol, propylene glycol, glycerol, pentaerythritol, sorbitol, ethylene carbonate (1,3-dioxolane-2-one), and propylene carbonate (4-fluorenyl group). -1,3-dioxolane-2-one) and the like, but are not limited to these compounds. These first surface bridging agents can be used alone or in combination of two or more. The above-mentioned second surface bridging agent printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs is preferably a compound that can react with a carboxyl group and has a solubility factor of 12.5 (cal / cm3) l / 2 or less, and more preferably 9.5031 / (: 1113) 1/2 ~ 12.0 (〇 & 1 / (; 1113) 1/2. Compounds in the range of gardens. The second surface bridging agent may be, for example, ethylene glycol, triethylene glycol, tetraethylene glycol, diethylene glycol. Propylene glycol, tripropylene glycol, 1,3-butanediol, 1,4-butanediol, 1,5-pentanediol, 2,4-pentanediol, 1,6-hexanediol, 2,5-hexane Glycol, diethanolamine, triethanolamine, ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerol polyglycidyl ether, diglycerol polyglycidyl acid, polyglycerol polyglycidyl ether, propylene glycol diglycidyl ether Ether, polypropylene glycol diglycidyl ether, ethylenediamine, diethylenetriamine, triethylenetetramine, 2,4-toluene diisocyanate, hexamethylene diisocyanate, 4,5-dimethyl-1,3- Dioxolane-2-one, epoxy propane, 'epoxybromopropane, etc.' but not limited to these compounds. These second surface bridging agents can be used alone or in a mixture of two kinds. The paper size applies the Chinese National Standard (CNS) A4 specification (2 i 0 X 297 mm). Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. The surface bridging agent in the above is used by mixing one or more compounds selected from the above-mentioned surface bridging agent group and one or more compounds selected from the above-mentioned second surface bridging agent group The amount of surface bridging agent varies depending on the compound used and its combination, relative to the solid content of the precursor of the water-absorbing agent, 100 unit weight, in the range of 001 unit weight to 10 unit weight. Preferably, 0.01 unit weight to 5 unit weight is better in the range. In addition, when the tough surface bridging agent and the second surface bridging agent are used, the solid content of the water absorbing agent precursor is 100 unit weight, and the first surface bridging agent is used. The dosage is from 0'01 unit weight to 5 unit weight. The amount of the second surface bridging agent is preferably from 0001 unit weight to J unit weight. The amount of the first surface bridging agent is 0.001 unit weight to 2 units. The amount of the second surface bridging agent is preferably in the range of 0.005 unit weight to 0.05 unit weight. The use of the above surface bridging agent can make the density of the bridging agent near the surface of the water-absorbent precursor, that is, the water-absorbing resin higher than the inside If the amount of surface bridging agent exceeds 10 unit weights, it is not only uneconomical, the amount of surface bridging agent will be more than that used to form the optimal bridging structure in the water absorbent, so it is not suitable. Also, the surface bridging agent is not suitable. When the amount is less than ^ .❹ ^ per unit weight, it is difficult to obtain improved effects on the performance of the water absorption agent such as the diffusion absorption rate, so it is not suitable. When mixing the water absorbing agent precursor and surface bridging agent, it is preferable to use water as the solvent. . The amount of water varies depending on the type, particle size, and water content of the water-absorbent precursor. It is 100 units by weight, preferably 0 or more and 20 units by weight, and more preferably In unit weight of 〇5 ~ This paper size applies Chinese National Standard (CNS) A4 specification (210X297 mm) (Please read the precautions on the back before / fill in this page)

4193 82 I 丨 — 5. Description of the invention (l9) Within the range of unit weight. When mixing the water-absorbing agent precursor and the surface bridging agent, a hydrophilic organic solvent may be used as the solvent as required. The hydrophilic organic solvent may be, for example, lower alcohols such as methanol, ethanol, n-propanol, isopropanol, n-butanol, isobutanol, and t-butanol; ketones such as acetone; dioxane, tetrakis Ethers such as hydrogen squeaking; amines such as N, N-dimethylformamide; subbases such as dimethylsulfine and the like. The amount of the hydrophilic organic solvent varies depending on the type and particle size of the water-absorbing agent precursor, and the solid content of the water-absorbing agent precursor is preferably 20 unit weight or less, more preferably Within the range of 0.1 unit weight to unit child amount. When mixing the water-absorbing agent precursor and the surface bridging agent, for example, the water-absorbing agent precursor may be dispersed in the above-mentioned hydrophilic organic solvent, and then the surface bridging agent 'may be mixed, but the mixing method is not particularly limited. Among the various mixing methods, the method of directly mixing, spraying or dropping the surface bridging agent, which needs to be dissolved in water and / or hydrophilic organic solvent, into the water-absorbing agent precursor is preferred. When mixed with water, insoluble fine particles or a surfactant can be coexisted in water. The mixing device used when mixing the water-absorbing agent precursor and the surface bridging agent is preferably a large mixing force, so that the two are evenly and surely mixed. The above-mentioned mixing device is preferably, for example, a cylindrical mixer, a double-walled cone mixer, a V-shaped mixer, a spiral blade mixer, a screw mixer, a flow furnace rotary disc mixer, an airflow mixer, Double wrist kneader, internal mixer, pulverizer, rotary mixer, screw extruder, etc. _____ -22- This paper size applies to Chinese National Standard (CNS) A4 size ^ 10X297 mm) " ------ Please kj

Note

I

4j9382 a7-B7 printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (20) After mixing the water-absorbing agent precursor and surface bridging agent, heat treatment is performed to bridge the surface of the water-absorbing agent precursor. The temperature of the above heat treatment varies depending on the surface bridging agent used, but it is preferably 80 ° C or more and 250 ° C or less', more preferably 1203C or more and 230 ° C or less. When the first surface bridging agent and the second surface bridging agent are used in combination, it is preferable! 6 〇 or more. When the processing temperature is less than 80 ° C (less than 160 C when the first and second surface bridging agents are used in combination), 'a uniform bridging structure will not be formed, so a water-absorbing agent with excellent performance such as diffusion absorption rate cannot be obtained. It is not appropriate. In addition, the heat treatment takes time, which causes a reduction in productivity. The processing temperature exceeds 2 50. In the case of 匚, it will cause the deterioration of the water-absorbing agent precursor, and thus the performance of the water-absorbing agent will be reduced. The above-mentioned heat treatment can be performed by a general dryer or a heating furnace. The above-mentioned dryers may be, for example, a trench-type mixer dryer, a rotary dryer, a tray dryer, a fluidized bed dryer, an air-flow dryer, an infrared dryer, and the like. The water absorption agent prepared by the above manufacturing method has a diffusion absorption rate of 25 g / g or more and a water-soluble content of 0 or more and 7 wt% or less after 60 minutes from the start of absorption. Therefore, the above-mentioned water-absorbing agent has the above-mentioned excellent water-absorbing properties. The reason why the water-absorbing agent in the present invention has very excellent properties such as diffusion absorption rate is not certain, but it is speculated that it should be a bridging agent controlled by a specific amount of a high hysteresis component in a specific range during the polymerization of an aqueous solution, and The dispersant uniformly disperses the South Buddha point component in the reaction system, maximizes the original bridging ability of the main component of the bridging agent hindered by the high boiling point component, and also efficiently performs the bridging reaction of the high boiling point component. This results in a significant reduction in the amount of water-soluble components. -23-The size of this paper applies to China National Standard (CNS) A4 (21〇χ297mm) " •-, {Please read the precautions on the back before writing 4 (write this page)

419382 at B7 V. Description of the Invention (21) Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Therefore, the above water-absorbing agent has the above-mentioned excellent water-absorbing properties. Therefore, when a water-absorbing agent is used in a water-absorbing body of sanitary materials such as incontinence pads such as paper diapers and tampons, even when the amount of the water-absorbing agent (water-absorbing resin) is large or the resin concentration in the absorbent body is high It also has almost no influence from the structure of the absorber, has a high diffusion absorption rate, a small amount of water-soluble components, and has a small amount of aqueous liquid return after a long period of time. It maintains a very high liquid diffusivity and long-term stable water absorption. Excellent performance (water absorption properties). This makes it possible to provide an absorbent article having the above-mentioned excellent properties. The above-mentioned water-absorbing agent is suitable for sanitary materials such as incontinence pads such as paper diapers and sanitary napkins which are required to be highly functional and thin. In addition, the above method can produce a water-absorbing agent having the above-mentioned excellent properties. In addition, deodorants, perfumes, various inorganic powders, foaming agents, pigments, hydrophilic short fibers, fertilizers, oxidants, reducing agents, water, salts, etc. can be added to the water-absorbing agent to absorb the water-absorbing agent and absorbent. Various functions are given to body and absorbent articles. Next, a water-absorbing agent, an absorbent, and an absorbent article which have excellent properties (water-absorbing properties) such as extremely high liquid diffusivity and water absorption at any time even if the resin concentration is increased are described. The absorbent body of the present invention preferably contains 40 weight of a water-absorbing agent having a diffusion absorption rate of 25 g / g or more 60 minutes after the start of absorption. / 0 or more, more preferably 50% by weight or more, still more preferably 60% by weight or more, most preferably 70% by weight or more. A water-absorbing agent having a diffusion absorption rate of 25 g / g or less 60 minutes after the start of absorption will deteriorate the lateral liquid diffusivity in an absorbent body with a high resin resin concentration (high concentration), and the absorption capacity of the absorbent body will decrease. Expansion 60 minutes after the start of absorption ^^^^ 1 ^^ 1.. ((Please read the precautions on the back before filling this page)

Li „Order-24- This paper size applies to Chinese National Standards (CNS) A4 specifications (2I0X297 mm) A7 B7 Central Standards of the Ministry of Economy 扃 Printed by Employee Consumer Cooperatives 4 ^ 9382 5. Description of the invention (22) Diffusion absorption. The ratio is more preferably 30 g / g or more. Even if a water absorbing agent having a diffusion absorption rate of 25 g / g or more is contained, the ratio is less than 40 weight ° /. The water absorption per unit weight of the absorber is also low. The absorbent of the invention contains a water-absorbing agent having a diffusion absorption magnification of 15 g / g or more calculated in addition to the above-mentioned diffusion absorption magnification, measured 30 minutes after the start of absorption, and measured 20 minutes after the absorption start. The calculated water absorption agent with a diffusion absorption ratio of I5 g / g or more is the best. That is, the water absorption agent of the present invention has a diffusion absorption ratio of 15 g / g or more after 30 minutes from the start of absorption and a diffusion absorption after 60 minutes. A magnification of 25 g / g or more is better, a diffusion absorption magnification of 20 minutes or more after the start of absorption and a diffusion absorption magnification of 25 g / g or more after 60 minutes is even better, and 20 minutes from the start of absorption After the diffusion absorption rate is 15g / g The diffusion absorption rate above 30g / g is the best after 60 minutes. The absorption capacity of the water absorption agent whose diffusion absorption rate is less than 15g / g 30 minutes after the start of absorption is not good in the lateral direction of the liquid. The absorption force of the absorbent body is reduced. The absorbent body of the present invention may include the above-mentioned hydrophilic fibers in addition to the water-absorbing agent. The structure of the absorbent body is not particularly limited as long as it is, for example, the structure illustrated above. In the structure illustrated above, It is better to mix the water-absorbing agent with the hydrophilic fibers uniformly and make the ratio of the water-absorbing agent in the absorbent body to be 40% by weight or more. A structure in which the total amount of the water absorbing agent and the hydrophilic fiber is 50% by weight or more, preferably 60% by weight or more, and more preferably 70% by weight or more is more preferable. By forming these structures, absorption The body can fully exert its water-absorbing properties. Also, 'the higher the resin concentration in the absorbent body, the present -25-this paper size applies to China National Standard (CNS) A4 specifications (210X297 mm) (please read the back first Note to fill out this page)

f Magic 93 82 A7 ___ B7 V. Description of the invention (23) The more obvious the characteristics of the water-absorbing agent and the absorber. When the ratio of the hydrophilic fibers in the absorbent body is small, the hydrophilic fibers, that is, the absorbent body, can be adhered to each other using the adhesive binder as exemplified above. The water-absorbing agent of the present invention is obtained by a method for synthesizing a specific water-absorbing agent precursor, and then heat-treating the water-absorbing agent precursor in the presence of a specific surface bridging agent. The average particle diameter of the above water-absorbing agent precursor is in the range of 200 μm to 600 μm, and the proportion of particles having a particle diameter of ≦ 06 μm is 10% by weight or less, and the hydrogel is formed after absorbing a large amount of water The resin. The water-absorbing agent precursor system is synthesized by, for example, polymerization in an aqueous solution. Specifically, the water-absorbing agent precursor can be a polypropionate partially neutralized bridge, a hydrolysate of a starch-acrylonitrile graft polymer, a starch-acrylic acid graft polymer neutralizer, and ethyl acetate Ester-acrylate copolymers, hydrolysates of acrylonitrile copolymers or acrylamide copolymers or their bridging agents, bridging polyvinyl alcohol denaturates containing carboxylic acid groups, bridging isobutylene-marin anhydride copolymer paper- ----—— T The above-mentioned water-absorbing agent precursor printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy can be selected from, for example, (meth) acrylic acid, maleic acid, maleic anhydride, fumaric acid, crotonic acid, itaconic Unsaturated carboxylic acids such as acids, acryloyloxypropionic acid, or neutralized ones! After polymerizing or copolymerizing more than one type of monomer, the polymer is subjected to necessary pulverization, classification and other operations, and the particle size is adjusted to obtain the polymer. Among the above monomers, (meth) acrylic acid and its neutralized substance are more preferable. In addition, the water-absorbing agent precursor may be a copolymer of the above monomers and other monomers 4 copolymerizable therewith. Specifically, the above-mentioned other monomers may be, for example, unsaturated monomers as exemplified above, that is, anionic unsaturated monomers and salts thereof; containing -26- scales applicable to China National Standard (CNS) A4 specifications (2 丨 〇χ297 公公(Chu) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs J: 419362 ΑΊ Β7 V. Description of the invention (24) Non-ionic hydrophilic unsaturated monomers; cationic unsaturated monomers, etc. The water-absorbing agent precursor contains a carboxyl group. The content of several bases in the water-absorbent precursor is not particularly limited, but it is more preferable that the base is present in an amount of 0.001 equivalent per 100 g of the water-absorbent precursor. When the water-absorbing agent precursor is, for example, a polyacrylic acid partially neutralized bridge, the proportion of polyacrylic acid unneutralized in the bridge is preferably in the range of 1 mol% to 60 mol%. It is preferably in the range of 10 mol% to 50 mol%. The water-absorbing agent precursor is preferably one which reacts or copolymerizes with a bridging agent having a plurality of polymerizable unsaturated groups or a plurality of reactive groups to bridge the inside. In addition, the water-absorbing agent precursor may be a self-bridged type that does not require a bridging agent. Specifically, the bridging agent may be Ν, Ν'-methylenebis (meth) acrylamide, (poly) ethylene glycol (fluorenyl) acrylate, (poly) propylene glycol (meth) propionate , Tris (hydroxymethyl) propane di (meth) propionate, tris (methyl) propane tris (meth) acrylate, glycerol di (meth) propionate g, glyceryl propionate methyl ester Acrylic acid vinegar, ethylene oxide modified trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (fluorenyl) propionate, triallyl cyanurate , Triallyl isocyanurate, triallyl phosphate, triallylamine, poly (fluorenyl) cyperoxyalkane, (poly) ethylene glycol diglycidyl ether, glycerol diglycidyl ether , Ethylene glycol, polyethylene glycol, propylene glycol, glycerin, pentaerythritol, ethylenediamine, polyethyleneimine, glycidyl (meth) acrylate, and the like. These bridging agents can be used alone or in combination of two or more. Among the compounds exemplified above, it is preferable to use a compound containing a plurality of polymerizable unsaturated groups as a bridging agent. The amount of bridging agent is preferably 0,005 moles relative to the total amount of the above monomers.

____- 27- This paper is accurate (CNS (Please read the notes on the back before filling this page)

419382 A7 Description of invention (25) Printed by the Shellfish Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs, in the range of mol% to 2mol%, and more preferably in the range of mol% to mol. When the amount of bridging agent is less than 0_005 mole% or higher than 2 moles, the diffusion absorption ratio of the water-absorbing agent will be reduced, so it is not suitable. 〇 心 When starting the polymerization reaction, a base polymerization initiator such as that exemplified above, an activation energy ray, and the like can be used. The diffusion absorption ratio of the aforementioned water-absorbing agent precursor does not satisfy the preferred range in the present invention. Therefore, a surface bridging agent must be used to make the density of the bridging near the surface of the water absorbing agent higher than that of the inside thereof. That is, a specific surface bridging agent is used to bridge the vicinity of the surface of the water-absorbing agent precursor to obtain the liquid agent of the present invention. That is, the water-absorbing agent of the present invention is a process such as classifying the water-absorbing precursor obtained by polymerizing the above-mentioned aqueous solution to adjust, for example, an average particle diameter in a range of 200 μm to 600 μm, and the particle diameter is less than 106 After the proportion of the particles is 10% by weight or less, the water-absorbing agent precursor is obtained by performing a heat treatment in the presence of a special surface bridging agent. The above-mentioned water-absorbing agent precursor can be granulated into a desired shape, and can also be spherical, scaly, irregularly shaped, granular, and other shapes. Moreover, the water-absorbing agent precursor can be i times the number of particles, or 2 Granules of secondary particles. For example, when the average particle size is outside the range of 200 μm to 600 μm, or when the proportion of particles having a particle size of 10 μm or less exceeds 10% by weight, a water-absorbing agent having excellent performance such as a diffusion absorption ratio may not be obtained. The surface bridging agent is obtained by mixing the first surface bridging agent and the second surface bridging agent with different solubility factors (8? 値). Mix one or more compounds selected from the above-mentioned surface bridging agent group and the above-mentioned 2-28- this paper; the degree is applicable to the Chinese National Standard (CNS) A4 specification (2Ι0 × 297 mm)- ----: ——— f Please read the precautions on the back before filling in this order 419382 A7 __I____B7 V. Description of the invention (26) The central standard of the Ministry of Economic Affairs 扃 正 工 consuming cooperatives printed the surface bridging agent selected 1 One or two or more compounds are particularly preferred for users. When only one or two or more first surface bridging agents are used, or when only one or two or more second surface bridging agents are used, there is a possibility that a water-absorbing agent having excellent properties such as diffusion absorption rate cannot be obtained. In addition, the amount of the surface bridging agent, the method for mixing the precursor of the water-absorbing agent and the surface bridging agent, and the mixing device used when mixing the two can adopt the above-mentioned amount, mixing method, and mixing device. When mixing the water-absorbing agent precursor and the surface bridging agent, the above-mentioned solvent (water and / or hydrophilic organic solvent) can be used. The temperature of the heat treatment depends on the surface bridging agent used, but it is more than 16 ° C and 250 Below ° C is preferred. When the processing temperature is lower than 160, a uniform bridge structure will not be formed, so it is not possible to obtain a water-absorbing agent with excellent properties such as diffusion absorption ratio, which is not suitable. In addition, the heat treatment takes time, which causes a reduction in productivity. When the processing temperature exceeds 250X :, it will cause the deterioration of the water absorbing agent precursor, thus reducing the performance of the water absorbing agent, so it is not suitable. The heat treatment can be performed by, for example, a dryer or a heating furnace as exemplified above. The water absorption agent prepared by the above manufacturing method has a diffusion absorption magnification of 15 g / g or more after 30 minutes from the start of absorption, and a diffusion absorption magnification of 25 g / g or more after 60 minutes. As described above, the absorbent body contains 40% by weight or more of a water-absorbing agent. Therefore, the above-mentioned water-absorbing agent and absorbent have the above-mentioned excellent water-absorbing properties. Therefore, when the absorbent body is used in an absorbent article, even when the amount of the water-absorbing agent is large or the resin concentration in the absorbent body is high, it has excellent properties such as maintaining a very high liquid diffusivity and water absorption (water absorption). characteristic). The water-absorbing agent in the present invention has very good properties such as diffusion absorption rate (please read the note on the back before filling in the clothing page)

r -Order_ Λ. -29- This paper size applies Chinese National Standard (CNS) A4 specification (210X297). A7 B7 5. The reason for the invention description (27) is not certain, but it is speculated that it should be the absorber The liquid diffusion and liquid communication of the aqueous liquid in the past is achieved by the capillary phenomenon of hydrophilic fibers in the conventional absorbent body, while in the absorbent body of the present invention, the liquid absorbent has a high liquid diffusivity with excellent diffusion absorption rate Liquid diffusing ability and liquid transmitting ability) were also exerted in the absorber. The absorbent article in the present invention is formed by sandwiching an absorbent layer containing an absorbent structure as described above with a sheet having liquid permeability and a sheet having liquid impermeability. Since this absorbent article has an absorbent layer including the absorber structured as described above, it has the above-mentioned excellent water absorption characteristics. Specifically, the absorbent article may be, for example, sanitary materials such as so-called incontinence pads such as paper diapers and tampons, but it is not particularly limited. Since the absorbent article has excellent water-absorbing properties, for example, when the absorbent article is a paper diaper, leakage of urine can be prevented and a so-called dry feeling can be imparted. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs (please read the precautions on the back before filling this page). Make up. The material of the liquid-permeable sheet may be, for example, a nonwoven fabric or a woven fabric; a porous synthetic resin film made of polyethylene, polypropylene, polyester, polyamide, or the like. The aforementioned liquid-impermeable sheet (hereinafter referred to as a liquid-impermeable sheet) is composed of a material having a property of being impermeable to an aqueous liquid. The liquid-impermeable sheet may be, for example, a synthetic resin film made of polyethylene, polypropylene, ethylene acetoacetate, polyvinyl chloride, etc .; a film made of a composite material of these synthetic resins and a non-fibrous cloth; The film made of the above synthetic resin and non-woven composite material. The liquid-impermeable sheet may have a property of being impermeable to vapor. The structure of the absorption layer is not particularly limited as long as the above-mentioned absorber is provided. -30- This paper size is applicable to China National Standard (CNS) A4 (210X297 mm)

In addition, the manufacturing method of the absorbent layer printed by the staff consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs is not particularly limited. Furthermore, the method of sandwiching the absorbent layer between the liquid-permeable sheet and the liquid-impermeable sheet (that is, the method of manufacturing the absorbent article) is not particularly limited. In addition, it can be used as a deodorant, perfume, various inorganic powders, foaming agents, pigments, dyes, hydrophilic short fibers, fertilizers, oxidants, reducing agents, water, salts, etc. in the water absorbent or absorbent. Various functions are given to a water-absorbing agent, an absorber, and an absorbent article. Other objects, features, and advantages of the present invention will be fully understood after the following description: Also, the benefits of the present invention will be more apparent after referring to the drawings_ as follows. Brief Description of the Drawings Figure 1 is a schematic cross-sectional view of a measuring device used to measure the diffusion absorption rate of the performance shown by the water-absorbing agent of the present invention. Fig. 2 is a sectional view of an important part of the above-mentioned measuring device. Fig. 3 is a circle explaining the diffusion direction of physiological food in the above-mentioned device. Fig. 4 is a schematic view of a measuring device used for measuring the water absorption rate under pressure, which is one of the properties exhibited by the water-absorbing agent in the present invention. Fig. 5 is a schematic cross-sectional view of a measurement method used to measure the performance of the absorbent article or / collector of the present invention I-diffused absorption ratio. Fig. 6 is a plan view of an important part of the above measuring device. FIG. 7 is a diagram illustrating a diffusion direction of physiological saline in the measurement device. ^ Balance; 2: container; 2a, 2b ·· opening; 3: outside air suction tube; 4 5: measuring section; 6: glass, wood; 7: paper; 8: sheet; 9 support cylinder; 10: Metal mesh; 11: re-cutting; 12: physiological saline; 20 artificial urine; 20a, b: liquid surface; 21: burette; 21 &: main section; 21b side tube section; 2lc: top opening; 2ld: bottom opening 22: measurement; 23: catheter; 24: glass filter material; 25: measurement section;%: plug; 27: ... support cylinder; 29: non-woven fabric; 30: heavy weight. 28 -31-Private paper size applies Chinese National Standard (CNS) M size (210 X 297 mm) (Please read the precautions on the back before filling this page) Order

J Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 4193 82 A7 ______B7 V. Description of the invention (29) The best mode of the invention The following examples and comparative examples are used to further describe the present invention in detail, but the invention is not limited To any of them. In addition, the properties of the water-absorbing agent, absorbent body and absorbent article were measured by the following methods: 1) (a) water-absorbing rate i) tea-bag method: put 2 g of water-absorbing agent (or precursor of water-absorbing agent) uniformly A non-woven tea bag type (40 mm x 140 mm) was immersed in a 0.9% by weight aqueous sodium chloride solution (physiological saline). After 60 minutes, the tea bag was lifted, and after a certain amount of water was drained, the weight of the tea bag-type bag Wia (g) was measured. The same operation was carried out without using a water-absorbing agent, and the weight WGa (g) at this time was measured. Next, from the weight wla_w0a, the following formula: Water absorption ratio (g / g) = (weight Wla (g)-weight WGa (g)) / water absorbent weight (g) to calculate the water absorption ratio (g / g). ii) Centrifugation method Put 0.2 g of water-absorbing agent evenly into a non-woven bag (60mm X 60mm), and immerse it in a 0.9% by weight aqueous sodium chloride solution (physiological saline). After 60 minutes, the tea bag was lifted up and dehydrated at 250 G for 3 minutes using a centrifugal separator, and then the weight W1 b (g) of the bag was measured. The same operation was performed without using a water-absorbing agent, and the weight WQb (g) at this time was measured. Next, from the weight wlb. W0b, the following formula: Water absorption ratio (g / g) = (weight Wlb (g)-weight W0b (g)) / water absorbent weight (g) to calculate the water absorption ratio (g / g). (b) Water-soluble content -32- This paper size is applicable to Chinese National Standard (CNS) A4 (210X297mm) (Please read the precautions on the back before writing to 4 ...)

4193 82 A7 B7 V. Description of the invention (30) Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs, dispersing 0.500 g of water absorbing agent (or water absorbing agent precursor) in 1000 ml of deionized water, stirring for 16 hours, and filtering with filter paper Of it. Next, 50 g of the obtained filtrate was transferred to a 100 ml beaker, and into this solution, 1 ml of an aqueous solution of OH 1N-sodium hydroxide, 10.00 ml of an aqueous solution of N 200-methyl glycol chitosan, and 0.1% formazan 4 drops of aniline blue in water. Next, use the N / 400-polyethylene potassium sulfate aqueous solution to perform the titration of the glue solution of the above beaker solution. When the color of the solution changes from blue to magenta, the end point of the ZIL drop is determined, and the titer A (m 1 at this time) is obtained. ). The same operation was performed with 50 g of deionized water instead of 50 g of the filtrate, and the titer B (ml) at the time of blank titration was obtained. From these titrations, the neutralization ratio \ (mol%) of acrylic acid supplied to the water-absorbing agent with the amount of A. B is as follows: Amount of water-soluble component (% by weight) = (B (ml) -A (ml)) X 0.01 X [72 (100-x) + 94x] / 1 00 Calculate the amount of water-soluble components (% by weight). (c) Diffusion absorption ratio of water-absorbing agent First, a measuring device used for measuring the diffusion absorption ratio of a water-absorbing agent will be briefly described below with reference to Figs. i and 2. As shown in FIG. 1, the measurement device is composed of a balance i, a certain valley device mounted on the balance i, an outside air suction pipe 3, a duct 4 ′ glass filter material 6, and a measurement unit mounted on the glass filter material 6. 5 is composed. The container 2 has an opening portion 2a on its top, and an opening portion 2b on its side portion. The outside air suction pipe 3 is fitted above the opening portion, and a duct 4 is mounted on the opening portion 2b. In addition, the container 2 has a pre-filled amount of physiological saline 12 ^ The lower end of the external air suction tube 3 is submerged in the physiological saline 12. The diameter of the glass filter medium 6 is 7011. Containers 2 and 33-This paper size is in accordance with China National Standard (CNS) A4 specifications (210X 297 public production --------- clothing-V (Please read the precautions on the back before filling this page) Order-4 ^ 93 82 V. Description of the invention (3l) The printed glass filter material 6 of the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs is fixed at a position slightly higher than the lower end of the outside air suction pipe 3. As shown in FIG. 2, the measurement unit 5 has Filter paper 7, sheet 8, support cylinder 9, metal mesh 10 attached to the bottom of support cylinder 9, and heavy clock 11. The measurement section 5 sequentially loads filter paper 7 'sheet 8 and support cylinder 9 on glass filter material 6. (That is, the metal mesh 10), and supports the weight 11 inside the cylinder 9 (that is, on the metal mesh 10). The sheet 8 is made of polyethylene terephthalate (pet), and the center part has a diameter of 18 mm. The thickness of the opening part is 0mm thick and sweet. The inner diameter of the supporting cylinder 9 is 60mm. The metal mesh 10 is made of stainless steel to form a 40 mesh sieve (the size of the sieve is 3 8 μιη) . Spread a predetermined amount of water absorbing agent evenly on the metal mesh 10. Adjust the weight of the weight U so that the metal mesh 10 (that is, the water absorbing agent) is evenly spread. A load of 20 g / cm2 is applied to the ground. The diffusion absorption ratio of the water-absorbing agent is measured with the measuring device constructed as described above. The measuring method is described below. First, a predetermined amount of physiological saline 12 is added to the container 2 and the external air suction pipe 3 is embedded in the container. 2. Wait for the predetermined preparation operation. Next, load the filter paper 7 on the glass filter material 6 and load the sheet 8 on the filter paper 7 so that the opening is located at the center of the glass filter material 6. On the other hand, load At the same time, spread 1.5g of water-absorbing agent evenly inside the supporting cylinder 9 (that is, on the metal mesh 10) (preferably, adjust the particle size of the water-absorbing agent in advance to 300 μm to 500 μm by operations such as classification) 1.5g), a weight u is loaded on the water-absorbing agent. Next, a metal net 10 (that is, a water-absorbing agent) and a weight [the above-mentioned support cylinder 9 of the weight [丨] are loaded on the sheet 8 to make the center thereof. The part is the same as the central part of the broken glass filter material 6. Starting from the time when the supporting cylinder 9 is loaded on the sheet 8, every 20 minutes, 30_-34- This paper size applies to the Chinese National Standard (CNS) meal ^ ( (Please read the note on the back before filling in this page)

-Order ZA- 4 82

V. Description of the invention (32) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economy Minutes or 60 minutes later, use Balance 1 to measure the weight of physiological saline absorbed by the water absorbent W2 (g). As shown in Fig. 3, after passing through the opening portion of the sheet 8, the physiological saline 12 diffuses substantially uniformly in the lateral direction of the water-absorbing agent and is absorbed by the water-absorbing agent. Secondly, from the above-mentioned weight W2, the following formula: Water-absorbing agent diffusion absorption ratio (g / g) = weight W2 (g) / weight of the water-absorbing agent. Diffusion absorption rate of the agent (g / g). (d) Water absorption ratio of the water absorbing agent under pressure First, referring to Fig. 4, a device for measuring the water absorption ratio of the water absorbing agent under pressure will be briefly described. As shown in Fig. 4, the measuring device is composed of a burette 2i, a measuring table 22, a duct 23, a glass filter material 24 mounted on the measuring table 22, and a measuring section 25 mounted on the glass filter material 24. The burette 21 is formed in a T-shaped tube shape having a main pipe 2 1 a and a side pipe portion 2 1 b. The main pipe section 2 1 a has an opening section 2 1 c at the top thereof, and an opening section 2 2 at its bottom section. A plug 20 ′ is fitted in the opening section 2 i c, and a duct 28 is installed in the main pipe section 21 a. In addition, the side pipe portion 21b is protrudedly provided at the center of the side surface portion of the main pipe portion 2a, and its tip end is closed upward. The diameter of the upper surface of the measuring table 22 was 70 mni. The burette 2 1. The measuring table 22 and the conduit 23 communicate with each other. These burettes 2 i, the measuring table 22 and the guide tube 23 (that is, the communicating portion) have a predetermined amount of artificial urine 20. In addition, the main tube portion 2 1 a of the burette 21 is graduated. In addition, the position of the liquid surface 20a of the main portion 2b in the burette 2 is lower than the position of the liquid surface 20b of the main portion 2la by a predetermined height. -35- This paper applies Chinese National Standard (CNS) A4 specifications (210X 297 mm) according to the size (please read the notes on the back before filling this page) Order. 1 Printed by the Central Standards Bureau of the Ministry of Economic Affairs B7 V. Description of the invention (33) The above measurement Shao 25 has a filter paper 2 7, a support cylinder 28, a non-woven fabric 29 attached to the bottom of the support cylinder 28, and a weight 30. The measurement unit 25 sequentially loads the filter paper 27 and the support cylinder 28 (that is, the non-woven fabric 29) on the glass filter 24, and simultaneously supports the weight 30 on the inside of the cylinder 28 (that is, the non-woven fabric 29). The diameter of the glass breaking filter 24 is 70 mm. The inner diameter of the support cylinder 28 is 55 mm. The position of the filter paper 27 is set to a position equal to the liquid surface 20a of the side pipe portion 21b after the measurement stage 22 is loaded with the measurement unit 25. Furthermore, a predetermined amount of a water-absorbing agent is uniformly spread on the nonwoven fabric 29. The weight of the heavy clock was adjusted to uniformly apply a load of 20 g / cm2 on a non-woven fabric of 29 (water-absorbing agent). The diffusion absorption ratio of the water-absorbing agent was measured with the measurement device constructed as described above. The measurement method is explained below. First, a predetermined amount of artificial urine (composition: urea 9% by weight, NaCl 0.8% by weight, CaCl2 0.1% by weight, MgS04 0.1% by weight) 20 is prepared in advance, and the artificial urine 20 is injected into the communicating portion. Next, predetermined preparation operations such as attaching a stopper 26 to the opening portion 2 lc of the buret 21 and setting the measurement stage 22 to a predetermined height are performed. Next, a filter paper 27 is placed on a glass filter material 24 in the center of the measurement table 22. On the other hand, at the same time as these loading operations, 0.2 g of a water-absorbing agent is evenly spread inside the support cylinder 9 (i.e., on the non-woven fabric 29), and a weight 30 is loaded on the water-absorbing agent. Next, the above-mentioned support cylinder 28 having been loaded with the non-woven fabric 29 (i.e., the water-absorbing agent) and the weight 30 is loaded on the filter paper 27 so that the center portion thereof coincides with the center portion of the sloped glass filter material 24. Starting from the time when the support cylinder 2 8 is loaded on the paper 27, after 30 minutes -36- This paper size applies to China National Standard (CMS) A4 (210X297 mm) (Please read the note on the back first ($ Items refill this page)

Produced by DuPont 4193 82 at _B7, Central Labor Bureau of Ministry of Economic Affairs, Consumption Cooperation V. Description of the Invention (34) Read the burette 2 1 scale to determine the volume of artificial urine 20 (VKml) absorbed by the water absorbent. Next, from the above volume ν !, the following formula: The water absorption ratio of the water-absorbing agent under pressure (ml / g) = volume V! (Ml) / weight of the water-absorbing agent (g) Calculate the water-absorbing agent at 30 minutes after the start of water absorption. Water absorption rate under pressure (ml / g). (e) Diffusion absorption ratio of the absorbent article (or absorbent body) First, the measurement of the absorbent article (or absorbent body) is briefly described below with reference to FIGS. 5 and 6. They are all recorded as absorbent articles. In addition, for convenience of explanation, members having the same functions as those of the measurement device used for the above-mentioned diffusion absorption magnification are described by the same reference numerals, and descriptions thereof are omitted. As shown in FIG. 5, the measurement device is composed of a balance 1, a container 2, an external air suction pipe 3, a duct 4, a glass filter material 6 having a diameter of 120 mm, and a measurement unit 15 mounted on the glass filter material 6. As shown in FIG. 6, the measurement unit 15 includes a filter paper 7, a sheet 8, a support cylinder 19, and a weight 11. It does not have the above-mentioned metal mesh. The measurement unit 15 loads the filter paper 7, the sheet 8, and the support cylinder 9 'in order on the glass filter material 6, and the weight u is loaded inside the support cylinder 19. The sheet 8 is made of polyethylene terephthalate (PET), and the central part is formed in a rectangular shape having a rectangular opening with a thickness of 125 mm × 100 mm and a thickness of 0 lmrn. Support the square tube I9 Shao size is 100minx loomm. The inside of the square tube 19 is supported to load an absorbent article of a predetermined size. The other structures of the measuring device are the same as those used in the above-mentioned measurement of the diffusion absorption ratio. __- 37- This paper size applies to China National Standards (CNS) A4 specifications (210X297 mm) (Please read the precautions on the back before filling this page)

4193 82 A7 ___ B7 V. Description of the invention (35) ~-Measure the diffusion absorption factor of the absorbent article with the measuring device constructed as above. The measurement method is explained below. "First, the absorbent article is formed to a size of 100 mm X 100 mm. Further, a predetermined preparation operation is performed. Next, a filter paper 7 is loaded on the glass-breaking filter material 6, a sheet 8 is loaded on the filter paper 7, and The opening is located at the center of the broken glass filter 6 ^ Secondly, the support square tube 19 is loaded on the sheet 8 so that the center is consistent with the center of the glass filter 6. Then, 'inside the support square 19 ( That is, on the sheet 8), the absorbent article is loaded, and the weight 1 is loaded on the absorbent article. The loading operation of the absorbent article and the weight clock 11 is performed quickly. From the time when the absorbent article is loaded on the sheet 8 After 30 minutes or 60 minutes, the weight W3 (g) of the physiological saline solution 2 absorbed by the absorbent article was measured with the balance 1. Also, as shown in FIG. 7, the physiological saline solution 12 was passed through the opening of the sheet 8. After Shao, it diffuses approximately evenly in the transverse direction of the absorbent article and is absorbed by the absorbent article. Secondly, from the above weight W3, the following formula: Diffusion absorption ratio (g / g) of absorbent article = weight Wdg) / absorption Weight of sex articles (g) Central Standard of the Ministry of Economic Affairs The employee consumer cooperative printed and calculated the diffusion absorption ratio (g / g) of the absorbent article 30 minutes or 60 minutes after the start of water absorption. In addition, the bridging agents used in Examples 1 to 6 and Comparative Examples 1 to 3 were as follows [Preparation Method 1] In a water separator tube equipped with a stirrer, a cooling tube with a cooling tube, a thermometer, and an air blower • 38-This paper size applies to the Chinese National Standard (CNS) A4 (210X297) Printed by Zhengong Cooperative Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 4 193 82 A7 B7 V. Description of the invention (36) Into the 4 1L flasks, add 13 4g of tetramethylolpropane, 23 8g of acrylic acid, 170g of toluene, P —Toluenesulfonic acid 24g and hydroquinone 0.6g, while inhaling the air, heat the flask to 130 ° C. The reaction generated water is discharged out of the system by azeotropic dehydration with toluene, and the reaction is performed for a predetermined time. After the reaction was completed, the reaction solution was transferred to a separating funnel, and 500 g of 10% by weight NaOH water and 300g of 5% by weight NaOH water were used to neutralize unreacted acrylic acid. The layers were separated, and then added to the organic layer. 0-06g of hydroquinone monomethyl ester, toluene was distilled off under reduced pressure, The reaction product was obtained. As a result of gas chromatography (GC) and gel permeation chromatography (GPC) analysis, it was found that trimethylolpropane tripropionate and trimethylolpropane di which are the main components of the bridging agent The weight ratio of acrylic acid and trimethylolpropane diacrylic acid (β-propenyloxypropionate) to two or more compounds having a trimethylolpropane skeleton corresponding to a high boiling point component is 84/16. That is, After the above reaction and operation, a bridging agent A having a weight ratio of the main component of the bridging agent to the high boiling point component of 84/16 is obtained. [Preparation Method 2] Except that the reaction time is longer than the reaction time of Preparation Method 1, The same reaction and operation as in Method 1, a bridging agent B having a weight ratio of 78/22 of the main component of the bridging sword and the high stagnation point component was obtained. [Preparation method 3] Except that the reaction time is shorter than the reaction time of preparation method 1, the same reaction and operation as in preparation method 1 are performed to obtain a bridging agent C with a weight ratio of the main component of the bridging agent to the high boiling point component of 89/112 . -39- This paper size is applicable to the national standard (CNS) Λ4 specification (210X297 mm) (Please read the precautions on the back before seeing this page)

419382 a? Β7 V. Description of the invention (37) Printed by the Consumers' Cooperative of the Bureau of Standards, Ministry of Economic Affairs [Preparation Method 4] Except that the reaction time is longer than that of Preparation Method 2, the same reaction as Preparation Method 2 is performed And operation 'to obtain a bridging agent for comparison in which the weight ratio of the main component of the bridging agent to the high boiling point component is 72/28. Next, an aqueous solution of a hydrophilic unsaturated monomer is polymerized by using the bridging agent obtained in the above-mentioned production methods 1 to 4. [Example 1] 4.8 g of bridging agent A and 1.0 g of polyoxyethyl sorbitan monostearate as a dispersant were dissolved in 14 g of propylene base 4 as a hydrophilic unsaturated monomer, Furthermore, 4 3 8 2 g of a 37% by weight aqueous solution of sodium propionate as a hydrophilic unsaturated monomer and 5 5 1 g of ion-exchanged water were added to obtain a reaction solution. Next, the above reaction solution was supplied to a reactor formed by a stainless steel double-wrist kneader with a cover of 10 liters and an inner volume of 10 Σ blades. The reaction solution was maintained at 30 ° C and the system was maintained. Replace with nitrogen. Next, the reactor was kept at 30 ° C and stirring was continued, and 2.40 g of sodium persulfate and 0.1 2 g of L-ascorbic acid were added to start polymerization. Thereafter, the hydrogel-like polymer was taken out 10 minutes after the start of the polymerization. The obtained hydrogel-like polymer was subdivided into finely divided products, and this finely divided product was unfolded on a metal mesh of No. 50 sieve, and dried with hot air at 150 ° C for 90 minutes. Secondly, the dried product was shaken with a vibration mill Crush and classify with a metal mesh with No. 20 sieve to obtain a weight ratio of 3% with a water content of 4%, an average particle size of 350 μm, and a particle size below 106 μm. /. An irregularly shaped water-absorbent resin (ie, a water-absorbent precursor). The water absorption ratio of the obtained water-absorbent precursor measured by the tea bag method and the amount of water-soluble components (hereinafter referred to as the result) -40- This paper size is applicable to China National Standard (CNS) A4 specification (210X297 mm) (Please read first (Notes on the back then fill out this page)

Order .1. Economy, Central Bureau of Standards, Ministry of Industry, C, and Industrial Cooperative Cooperatives 4 82 at Β7 V. Description of Invention (38) and recorded in Table 1. [Example 2] Except replacing the bridging agent A in Example 1 with 4.8 g of bridging agent B, the same reaction and operation as in Example 1 were performed to obtain a water content of 5 ° /. An irregularly shaped, water-absorbent resin (that is, a water-absorbing agent precursor) having an average particle size of 300 μm and a particle size of 106 μm or less is 6 weight ° / 〇. The obtained results are also shown in Table 1. β '[Example 3] Except replacing the bridging agent A in Example 1 with 4.8 g of bridging agent C, the same reaction and operation as in Example 1 were performed to obtain a water content of 8%, An irregularly shaped, water-absorbent resin (ie, a water-absorbing agent precursor) having an average particle diameter of 4 0 0 μηη and a proportion of particles having a particle diameter of 1 06 μιη or less is 0.5% by weight. The results obtained are also shown in Table 1. β [Example 4] Except that the amount of the bridging agent A in Example 1 was changed from 4.8 g to 6.8 g, the same reaction and operation as in Example 1 were performed to obtain a water content of 5 %, An average particle size of 3 80 μm, and a proportion of particles with a particle size of 1 06 μm or less is 2% by weight of an amorphous and broken water-absorbing resin (that is, a water-absorbing agent precursor). The results obtained are shown in Table 1. [Example 5] Except that the amount of the bridging agent A in Example 1 was changed from 4.8 g to 1 3 · 6 g, the same reaction and operation as in Example 1 were carried out to obtain a water content of 4% and an average particle size. An irregularly shaped, water-absorbent resin having a diameter of 400 μιη and a particle size of less than 106 μιη is 1% by weight (that is, a water-absorbing agent precursor -41-This paper uses the Chinese National Standard (CNS) Α4% grid (210X297 mm) (Please read the notes on the back before filling in this page)

Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 4,9382 Λ? Β7 V. Description of Invention (39)). The results obtained are shown in Table 1. [Example 6] 6.8 g of bridging agent A and 2.3 g of partially fluorinated polyvinyl alcohol as a dispersant were dissolved in 29 g of acrylic acid as a hydrophilic unsaturated monomer, and then added as a hydrophilic unsaturated monomer A 37% by weight aqueous solution of sodium acrylate 4 3 8 2 g and ion-exchanged water 2 8 3 g were obtained to obtain a reaction solution. Thereafter, the same reaction and operation as in Example 1 were carried out to obtain an irregularly shaped water-absorbent resin (that is, water absorbing) having a water content of 8%, an average particle diameter of 520 μιη, and a proportion of particles having a particle diameter of 106 μιη or less of 0% by weight Agent precursor). The obtained results are also shown in Table 10. [Comparative Example 1] The same reaction and operation as in Example 1 were carried out except that 4.8 g of the bridging agent for comparison was used instead of the sedan agent a in Example 1. The water content was 5%, A comparatively water-absorbent resin (that is, a water-absorbing agent precursor for comparison) having an average particle size of 3 40 μm and a proportion of particles having a particle size of 1 06 μm or less is 5% by weight. The results obtained are shown in Table 1. -42- This paper is applicable to the Chinese National Standard (A4 size (2ΐ〇χ297mm) (Please read the precautions on the back before filling in this page)

4 卬 382

[Example 7] The unit weight of the water-absorbing agent precursor obtained in Example 1 and glycerin as the first surface bridging agent (SP 値: δ = 16 5 (cal / cm3) 1/2) were used. Unit weight, ethylene glycol diglycidyl ether as the second surface bridging agent (81 > 値: S = 10.2 (cal / cm3) 1/2) 0.1 unit weight, 3 unit weight of water and 1 unit weight of isopropyl alcohol The resulting surface bridging agent is mixed. The resulting mixture was heat-treated at 200 ° C for 40 minutes to obtain a water-absorbing agent. The water absorption ratio, water-soluble content, diffusion absorption ratio and water absorption ratio under pressure (hereinafter referred to as results) of the obtained water-absorbing agent measured by the tea bag method are shown in Table 2. [Examples 8 · 9] In addition to sequentially using Example 4. The water-absorbing agent precursor -43 prepared in Example 5-This paper size applies the Chinese National Standard (CNS) A4 specification (2i0x; 297 mm) 419382 λ7 ______ Β7 V. Description of the invention (4!) Except for 100 unit weight printed by the Ministry of Economic Affairs Central Standard Bureau®, the same processing as in Example 7 was performed to obtain the corresponding water-absorbing agent. The results obtained are shown in Table 2. [Comparative Examples 4 and 5] Except that 100 units of the comparative water-absorbing agent precursor prepared in Comparative Example 3 were used in sequence, the same heat treatment as in Example 7 was performed, and each corresponding water-absorbing agent was obtained. . The results obtained are shown in Table 2. [Comparative Example 6] A partially neutralized and bridged starch-acrylic acid graft polymer (trade name: SUNWET IM3900P; manufactured by Hoechest Celanese Co., Ltd.) was used for comparison. Agent. The results obtained are shown in Table 2. [Comparative Example 7] A partially neutralized and bridged acrylic polymer (trade name: DIAWET US2-45Z; manufactured by Mitsubishi Petrochemical Co., Ltd.) was used as a water-absorbing agent for comparison. The results obtained are shown in Table 2. [Comparative Example 8] A partially neutralized and bridged malic acid polymer (trade name: AQUAKEEP SA-60; manufactured by Sumitomo Chemical Co., Ltd.) was used as a water-absorbing agent for comparison. The results obtained are shown in Table 2. [Comparative Example 9] A polymer water-absorbing agent was taken out of a paper diaper called Satisfied Baby (γ ί — shown. 3, trade name) made by Unicorn Co., Ltd., and used as a water-absorbing agent for comparison. The results obtained are shown in Table 2. -44-This paper applies Chinese National Standard (CNS) Α4 size (210x297 male thin) (Please read the precautions on the back before filling this page)

419382 Printed by the Consumer Cooperatives of the Central Bureau of Standards of the Ministry of Economic Affairs A7 B7 V. Description of Invention (42

[Example 10] 75 unit weight of the water-absorbing agent obtained in Example 7 and 25 unit weight of wood crushed pulp as hydrophilic fibers were dry-blended with a mixer. The said compound was formed into a fiber web of 100 mm X 100 mm, and after applying a pressure of 2 kg / cm2 to the fiber web for 1 minute, an absorption composed of an absorber having a weight per unit area of about 0.035 g / cm 2 was obtained. Sex items. The diffusion absorption ratio (hereinafter referred to as the result) of the obtained absorbent article after 60 minutes is also shown in Table 3. [Example 1 1. 12] In addition to using Example 8 in order, the water-absorbing agent prepared in Example 9 was used instead of solid-45-This paper uses the Chinese national standard (CNS > A4 specification (210X297 mm)) ( (Please read the notes on the back before writing this page)

4193 82 A7 B7 5. Description of the invention (43) Except for the water-absorbing agent in Example 10, an absorbent body was prepared in the same manner as in Example 10, and each corresponding absorbent article was obtained. The results obtained are shown in Table 3. [Comparative Example 1 0 to 15] An absorbent body was prepared in the same manner as in Example 10, except that the comparative water absorbing agent prepared in Comparative Example 4 to Comparative Example 9 was used in place of the water absorbing agent in Example 10. 'Each corresponding comparative absorbent article was obtained. The results obtained are shown in Table 3. Printed by the Consumers' Cooperative of the China Standards Bureau of the Ministry of Economic Affairs. Table 3 Diffusion absorption rate (g / g) of absorbent articles after 60 minutes Example 1 0 24.7 Example 1 1 25.5 Example 12 25.2 Comparative Example 1 0 23.4 Comparative Example 11 24.1 Comparative Example 12 10.7 Comparative Example 13 10.8 Comparative Example 1 4 15.8 Comparative Example 15 8.6 [Example 13] The water-absorbing agent 75 obtained in Example 7 was 5 unit weight and 25 units of wood pulverized pulp as hydrophilic fibers The weight is dry-mixed with a mixer. Its -46-This paper size applies Chinese National Standard (CNS) A4 specification (210X: 297 mm) (Please read the precautions on the back before filling out this page) Order 419382 5. Invention Description (44) times, will get The mixture was air-made using a batch-type air-making machine on a wire screen formed on a No. 400 sieve hole (the size of the sieve hole was 38 μm) to form a 120 mm × 400 mm large fiber web. A pressure of 2 kg / cm2 was applied to the fiber web for 5 seconds to obtain an absorbent having a weight per unit area of about 0.047 g / cm2. Next, a back surface layer made of liquid-impermeable polypropylene with so-called leg gathers, the above-mentioned absorbent body, and a liquid-permeable top surface layer made of polypropylene were sequentially attached with double-sided tape. At the same time, two so-called fixing tapes are installed on this sticker to obtain an absorbent article (that is, a paper shit cloth). The weight of this absorbent article is 4 6 g. Α After the above absorbent article is worn on a so-called Kewpie doll (55cm in length and 5kg in weight), the baby frog is placed in a prone position 'in the absorbent article Between the doll and the doll, insert a tube at a position corresponding to the human body's urination, and inject 50 ml of physiological saline solution every 20 minutes for a total of 250 ml. Then 'place the aforementioned doll at 37. After holding for 16 hours, remove the absorbent article. Printed on the central part of the absorbent part of the absorbent article taken out by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs, 10 sheets of so-called paper napkins are stacked, and a load of 10 kg is applied to these paper napkins for 1 minute. The amount of water absorbed by the paper napkin (ie, the return flow of physiological saline from the absorbent article (g)). The results obtained are shown in Table 4. [Example 1 4 · 1 5] The same operation as in Example 13 was performed except that the water absorbing agent prepared in Example 8 and Example 9 was used instead of the water absorbing agent in Example 13, in order. Absorbent articles. After that, the absorbent material from these papers was measured-47- This paper is sized to fit the financial standards (CNS) A4 (210X297) 7 4 ^ 3 62 Λ7 B7 V. Description of physiological saline solution (45) Return flow (g). The results obtained are also recorded in Table 4. [Comparative Examples 1 6 _ 1 7] Except using Comparative Example 4 sequentially. The comparative water absorbing agent prepared in Comparative Example 5 replaced the water absorbing agent in Example 13 Other than that, the same operation as in Example 13 was performed to obtain corresponding comparative absorbent articles. Thereafter, the return flow rate (g) of physiological saline solution from these comparative absorbent articles was measured. The results obtained are recorded in the table. 4. Table 4 Return Flow (g) Example 13 3.1 Example 14 2.3 Example 1 5 0.7 Comparative Example 16 6.6 Comparative Example 17 9.2 (Please read the precautions on the back before filling out this page) Yiyang JIJ .L * η--Order-Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs. From the results described in Tables 1 to 4, it is obvious that the water-absorbing agent of the present invention has a high diffusion absorption rate, a small amount of water-soluble components, And the absorbent article made with the resin concentration of the absorbent body after long After a short period of time, the aqueous liquid has a low flow rate, maintains a very high liquid diffusivity, and has a long-term stable water absorption capacity. (Example 1 6) Polyethylene glycol diacrylate as a bridging agent ( The average additional mole number of ethylene oxide 8) 1 8.49g was dissolved in a 30% by weight aqueous solution 5500gt of sodium acrylate (neutralization ratio 65 mole%) as a monomer to obtain a reaction solution. -48 -This paper size uses Chinese National Standard (CNS) M specifications (21〇 > < 297 mm) Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 419382 A7 B7 V. Description of the invention (46) times The reaction solution was degassed in a nitrogen atmosphere for 30 minutes. Next, the above reaction solution was supplied to a reactor formed by a stainless steel double-wrist kneader with a cover and an inner volume of 10 L having two Σ-shaped blades, and the reaction was performed. The solution was maintained at 30 ° C and the system was replaced with nitrogen. Next, the reaction solution was continuously stirred, and 2.3 g of ammonium persulfate and 0.12 g of L-ascorbic acid were added, and polymerization was started after about 1 minute. Thereafter, the temperature was changed from 30 ° C to 80 ° C. Polymerization was performed at ° C, and water was taken out 60 minutes after the start of polymerization Gel-like polymer. The obtained hydrogel-like polymer was subdivided into a diameter of about 5 mm. The hydrogel-like polymer after this subdivision was spread on a metal mesh with a mesh size of 50, and heated at 150 ° C with hot air. Dry for 90 minutes. Secondly, pulverize the dried material with a vibrating mill and classify it with a metal mesh of No. 20 sieve to obtain an average particle size of 3 60 μm and a particle size of 10 6 μm or less. The proportion is 5 weight. % Of amorphous shaped broken water-absorbing agent precursor. 100 unit weight of the obtained water-absorbing agent precursor and glycerin (SP 値: 5 = 16.5 (cal / cm3) 1/2) l unit weight as the first surface bridging agent, and B as the second surface bridging agent A surface bridging agent composed of diol diglycidyl ether (s P 値: S = 10.2 (cal / cm3) 1/2) 0.05 unit weight, 3 unit weight of water, and 1 unit weight of ethanol. The mixture was heat-treated at 1 95 ° C for 40 minutes to obtain a water-absorbing agent. The average particle size of the obtained water-absorbing agent was 360 μm, and the proportion of particles having a particle size of 106 μm or less was 5 wt%. The water absorption ratio and diffusion absorption ratio (hereinafter referred to as the results) of this water absorbing agent measured by the centrifugal separation method are shown in Table 5. [Example 17] 3.59 g of methyltrimethylpropanetriacrylic acid I as a bridging agent was dissolved in -49- This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the back first) (Notes for filling in this page)

^ 82 A7 _______B7 V. Description of the invention (47) In a solution of 5 500 g of a 39% by weight aqueous solution of sodium acrylate (with a neutralization rate of 75 mole%), a reaction solution was obtained. Next, the reaction solution was degassed under a nitrogen atmosphere for 30 minutes. Next, the above reaction solution was supplied to the same reactor as the reactor of Example i 6 and the reaction solution was maintained at 30. (: The system was replaced with nitrogen. Then, the reaction solution was continuously stirred, and 24 g of ammonium persulfate & L_ascorbic acid 0.12 g was added, and polymerization was started in about 1 minute. Thereafter, it was at 30 ° C to 80. (: Polymerization was carried out, and the water-containing gel-like polymer was taken out 60 minutes after the start of the polymerization chamber. The obtained water-containing gel-like polymer was subdivided into a diameter of about 5 mra. The metal mesh of the sieve is unfolded and dried with hot air at 150 ° C for 90 minutes. Secondly, the dried material is pulverized with a vibration mill, and then classified by a metal mesh with a 20 mesh sieve to obtain an average particle size of 40. An amorphous and broken water-absorbing agent precursor with a particle size of 10 μm and a particle size of less than 106 μιη is 5% by weight. The water-absorbing agent precursor printed by the shellfish consumer cooperative of the Central Standards Bureau of the Ministry of Economic Affairs prints the obtained water-absorbing agent precursor 10. 〇Unit weight and ethylene glycol (SP 値: S = 14.6 (cal / cm3) 1/2) 0.5 as the first surface bridging agent 0.5 unit weight glycerin polyglycidyl ether (sp値: 3 = 10.8 (cal / cm3) 1/2) 〇_l unit weight, 3 unit weight of water and ethanol The surface bridging agent composed of 1 unit weight is mixed. The above mixture is heat-treated at 195 ° C for 40 minutes to obtain a water-absorbing agent. The average particle diameter of the obtained water-absorbing agent is 400 μπι, and the particle diameter is less than ΐ06 μπι. The proportion is 3% by weight. The results of this water absorbing agent are also shown in Table 5 ^ [Example 18] 35 g of N, N, -methylenebis (meth) acrylamide 2 as a bridging agent was dissolved in propylamidine 20 weight of sodium. 5 0 g of aqueous solution, the reaction solution was obtained. Its _____ -50- This paper size is applicable to the national standard (CNS) A4 specification (210X297 mm) "93 82 at B7 V. Description of the invention ( 48) times, the reaction solution was degassed under a nitrogen atmosphere for 30 minutes. Next, the above reaction solution was supplied to the same reactor as the reactor of Example 16, the reaction solution was maintained at 30 ° C and the system was replaced Nitrogen was formed. Then, the reaction solution was continuously stirred, and 1.5 g of ammonium persulfate and 0.07 g of L-ascorbic acid were added, and polymerization was started in about 1 minute. Thereafter, polymerization was performed at 30 ×: to 80. After polymerization was started, polymerization was started. After 60 minutes, add sodium carbonate neutralizer 606.7 g and After mixing, the water-containing gel-like polymer is taken out. The neutralization rate of the obtained water-containing gel-like polymer is 75 mol%, and it is subdivided into. The diameter is about 5 mm. Unfolded on the metal mesh of No. 50 sieve, and dried with hot air at 150 ° (for 90 minutes.) Second, the dried matter was pulverized with a vibration mill, and then classified by the metal mesh of No. 20 sieve to obtain an average. An irregularly shaped, water-absorbent precursor having a particle size of 39 μm and a particle size of 10 06 μm or less is 4% by weight. Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs with 100 unit weight of the obtained water-absorbing agent precursor and propylene glycol as the first surface bridging agent (SP 値: S = 12.6 (cal / cm3) 1/2) 0.75 unit weight, A surface composed of propylene glycol diglycidyl ether as a second surface bridging agent (§ pcm: S = 10.1 (cal / cm3) 1/2) 0.05 unit weight, 3 unit weight of water, and 0.75 unit weight of ethanol Bridging agent mixed. The above mixture was heat-treated at i95 »c for 40 minutes to obtain a water-absorbing agent. The average particle diameter of the obtained water-absorbing agent was 380 μm, and the proportion of particles having a particle diameter of 106 μm or less was 3% by weight. The results of this water-absorbing agent are shown in Table 5. [Comparative Example 18] 718 g of trimethylolpropane triacrylate as a bridging agent was dissolved in 5500 g of a 39% by weight aqueous solution of sodium acrylate (neutralization rate 75 mole%), -51-exhaustion. Applicable to China National Standard (CNS) M specification (2 丨 〇 < 297 mm) ____ £ 7 4 19382 A7 V. Description of the invention (49) The reaction solution was obtained. Next, the reaction solution was degassed under a nitrogen atmosphere for 30 minutes. Next, the above reaction solution was supplied to the same reactor as the reactor of Example 16 'to maintain the reaction solution at 30T: and the system was replaced with nitrogen. Then, the reaction solution was continuously stirred, and 5.0 g of sodium persulfate and 0.25 g of L-ascorbic acid were added. The polymerization was started after about 1 minute. Thereafter, at 30.匸 ~ 80. (: Polymerization is performed below 60 minutes after the start of polymerization. The water-containing coagulating polymer is taken out. The transferred water-containing gel-like polymer is subdivided into a diameter of about 5 mm. The metal mesh of No. sieve is unrolled and dried with hot air at 150C for 90 minutes. Secondly, the dried material is pulverized with a vibration mill, and then classified by the metal mesh of No. 20 sieve to obtain an average particle size of 360 μm and Comparative water-absorbing agent in the shape of broken particles in a proportion of 5 wt% or less is 5% by weight. The results of the comparative water-absorbing agent obtained are shown in Table 5. [Comparative Example 19] Except for N which is used as a bridging agent , N · -methylenebis (meth) propanamine U_67g was substituted for the trihydroxymethylpropane triacrylate except for the '18 in Comparative Example 18 and subjected to the same reaction and operation as in Comparative Example 18 to obtain an average particle diameter of 400 μm Comparative water-absorbing water-absorbing agent with an irregular shape and a proportion of particles having a particle diameter of ≦ 6 μm or less is 3% by weight. The results of the comparative water-absorbing agent obtained are shown in Table 1. [Comparative Example 2 0] Partially neutralized and bridged acrylic polymer (Product name: Acrylic (7th, 7th, and 7th), CA · W4; manufactured by Yoshimoto Catalyst Co., Ltd.) is a water-absorbing agent for comparison. The results obtained are shown in Table 5. L -52- ^ Degree of this paper Applicable to China National Standard (CNS) A4 specification (210X297 mm) 4 ^ 382 A7 B7 V. Description of the invention (50) [Comparative Example 2 l] Starch-acrylic acid grafted polymer (commercial name) partially neutralized and bridged : SUNWET IM3900P; manufactured by Hoechest Celanese Co., Ltd.) is a comparative water-absorbing agent. The results obtained are recorded in the table. [Comparative Example 2] Partial neutralization and bridging Hyaluronic acid polymer (trade name: DIAWET US2-45Z; manufactured by Mitsubishi Petrochemical Co., Ltd.) is a comparative water-absorbing agent. The results obtained are shown in Table 5. [Comparative Example 23] Partially neutralized The bridging acrylic polymer (trade name: AQUAKEEP SA-60; manufactured by Sumitomo Chemical Co., Ltd.) is a comparative water-absorbing agent. The results obtained are shown in Table 5. [Comparative Example 24] Cong Youni Jiao Meng Co., Ltd. called the satisfied baby 5 Seeking 3, trade name) of the disposable diaper taken polymer water-absorbing agent, as to the comparative water-absorbing agent. The results obtained are shown in Table 5. Printed by the Consumers 'Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 3 5 This paper size applies to the Chinese National Standard (CNS) Α4 size (210X297 mm) ---------- Λι $-Γ' (Please read first Read the notes on the back and fill out this 苋), -Dream

419382 A7 _______ B7 V. Description of the invention (51) Table 5 Water absorption rate of the centrifugation method Diffusion absorption rate (g / g) 20 minutes after 30 minutes 30 minutes after 60 minutes Example I 6 3 1 20.8 28.6 3 1.3 Examples 1 7 30 22.5 27.9 30.1 Example 1 8 38 16.0 24.0 33.9 Comparative Example 1 8 3 1 3.6 5.9 11.7 Comparative Example 1 9 18 10.1 16.7 21.1 Comparative Example 20 40 20.3 22.1 23.1 Comparative Example 2 1 33 4.2 6.5 11.7 Comparative Example 22 37 6.9 9.7 12.2 Comparative Example 2 3 39 9.6 13.9 2 1.1 Comparative Example 24 32 3.7 5.7 9.1 (Please read the notes on the back before filling out this page) 1r Printed by the Employees' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs [Example 19] Will be implemented 45 unit weight of the water absorbing agent prepared in Example 16 and wood crushed pulp as hydrophilic fiber 55 unit weight were dry-mixed by a mixer. The obtained mixture was formed into a fiber web of 100 mm X 100 mni, and a pressure of 2 kg / cm2 was applied to the fiber web for 1 minute to obtain an absorbent body composed of an absorber having a weight per unit area of approximately 0.05 Og / cm2. Diffusion absorption ratios (hereinafter referred to as results) of the obtained absorbers are also shown in Table 6. [Example 2 0] The unit weight of the water absorbing agent prepared in Example 16 and the wood crushed paper were poly-54-. The paper size was adapted to the Chinese National Standard (CNS) A4 specification (21〇297297) 4 ^ 382 at___ — B7 V. Description of Invention (52) The Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs printed 50 units of weight for dry mixing using a blender. The obtained mixture was formed into a fiber web of 10011111 \ 100 ^ 111, and 2] ^ / (; 1112 pressure for 1 minute # \ was applied to the fiber web to obtain an absorption of about 0.0047 g / cm2 per unit weight. The results of the obtained absorber are also shown in Table 6. [Example 2 1] Dry mixing was performed in a mixer using 60 unit weight of the water-absorbing agent and 40 unit weight of the wood pulverized pulp obtained in Example 16. The obtained mixture was mixed. A fiber web of 10011111 \ 10011111 was formed, and after applying a pressure of 21 ^ / (; 1112) to the fiber web for 1 minute, an absorbent having a weight per unit area of about 0.0041 g / cm2 was obtained. The results are recorded in Table 6. [Example 22] The unit weight of 75 units of the water-absorbing agent and the unit weight of wood crushing pulp obtained in Example 16 were dry-mixed with a mixer. The resulting mixture was formed into fibers of 100 mm × 100 mm. After applying a pressure of 2 kg / cm2 to the fiber web for 1 minute, an absorbent with a weight per unit area of about 0.005 g / cm2 was obtained. The results of the obtained absorber are shown in Table 6. [Example 23 -24] In Example 22, except that Example 1? The water-absorbing agent obtained in Example 1s was used in place of the water-absorbing agent obtained in Example 10, and a water-absorbing agent was prepared in the same manner as in Example 22. The results of the obtained absorbent are shown in Table 6. [Comparative Example 25] In Example 19, a comparative water-absorbing agent was prepared in the same manner as in Example 19, except that the comparative water-absorbing agent obtained in Comparative Example 18 was used in place of the comparative water-absorbing agent obtained in Example 16. The results of the obtained comparative absorbent were recorded. In Table 6. -55 · This paper size is applicable to China National Standard (CNS) A4 specification (210X297 public love) (Please read the notes on the back before filling this page) Trial _-order. ^ 419382

[Comparative Example 2 6]: In Example 20, a water-absorbing agent for comparison was obtained in the same manner as in Example 20 except that the water-absorbing agent for comparison obtained in Comparative Example 18 was used. The results of the obtained comparative absorbers are shown in Table 6. [Comparative Example 27] In Example 21, a comparative water-absorbing agent was prepared in the same manner as in Example 21 except that the comparative water-absorbing agent obtained in Comparative Example 18 was used instead of the comparative water-absorbing agent obtained in Example 16. The results of the obtained comparative absorbers are shown in Table 6. [Comparative Example 2 8 to 3 4] Example 22 was the same as Example 22 except that Comparative Example 1 8 to Comparative Example 2 were sequentially replaced with the water absorbent obtained in Example 16 instead of the water absorbent obtained in Example 16. A comparative water-absorbing agent was prepared in the same manner. The results of the comparative absorbers obtained are recorded in Table 6. 印 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs -56- This paper is in accordance with the Chinese National Standard (CNS) Α4 specification (210X297 mm) 419382 Α7 Β7 (54) Printed by the Central Bureau of Quasi-Ministry of Economy and Industry and Consumer Cooperatives. Table 6 Diffusion absorption rate (g / g) of absorber 30 minutes and 60 minutes later Example 1 9 19.4 19.7 Example 2 0 19.5 20.1 Example 2 1 19.3 22.2 Example 22 19.1 24.3 Example 2 3 19.4 23.1 Example 24 17,9 25.6 Comparative Example 2 5 17.6 18.5 Comparative Example 2 6 10.1 15.1 Comparative Example 2 7 9.6 14.2 Comparative Example 2 8 7.3 10.4 Comparative Example 2 9 13 0 16.9 Comparative Example 3 0 16.0 18.3 Comparative Example 3 1 7.4 10.7 Comparative Example 3 2 9.1 10.7 Comparative Example 3 3 11.5 15.8 Comparative Example 3 4 6.8 8.6 [Example 25] The water-absorbing agent prepared in Example 16 was 50%. Unit weight and 50 unit weight of wood crushed pulp are dry-mixed with a mixer. Secondly, the obtained blend-57- this paper size applies the Chinese National Standard (CNS) A4 specification (2 〖〇χ297mm） (Please read the precautions on the back before filling in this page}. Wave. -Order. 419382 A7 B7 V. Description of Invention (55) The printed materials of the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs are used to make batch-type air on a wire screen formed on a No. 400 sieve (the size of the sieve is 38 μm). The machine was air-made to form a 120mm X 400mm large fiber web. A pressure of 2kg / cm2 was applied to the fiber web for 5 seconds to obtain an absorbent having a weight per unit area of about 0.047g / cm2. Next, the liquid was impermeable Back layer (liquid impervious sheet) with so-called leg gathers, liquid absorbent sheet and top layer (liquid impervious sheet) made of polypropylene with absorbent body and liquid permeability Stand on both sides in order, and install two so-called fixing tapes on this sticker to get an absorbent article (that is, a paper diaper). The weight of this absorbent article is 46 g. Wear the above absorbent article Kewpie After placing the doll on the doll (5 5cm in length and 5kg in weight), "insert a tube between the absorbent article and the doll and place it in a position equivalent to human's urination" every 20 minutes. 50 ml of physiological saline was injected once. Then, when the injected physiological saline was not absorbed by the absorbent article and leaked out, the above operation was ended, and the amount of physiological saline injected until then was measured. Repeat After the above measurement was performed 4 times, the average value of the measured tritium was determined, and the tritium was taken as the absorption amount. As a result, the absorption amount was 250 g. [Comparative Examples 3 to 5] In Examples 2 to 5, except for those obtained in Comparative Example 18 In comparison, a water-absorbing agent was used instead of the water-absorbing agent obtained in Example 16. A comparative absorbent article was prepared in the same manner as in Examples 25. The weight of this comparative absorbent article was 46 g. -58-This paper size applies to China National Standard {<:?) 规格 4 specifications (210 乂 297 mm > ---------- Ί-Αζ-I 1-. (Please read the precautions on the back before filling in this Page) Order A7 B7 4j ^ 38 V. Description of the invention (56) Use the absorbency for comparison After repeating the same measurement 4 times as in Example 25, the article was measured for the average value of the measured tritium, and the tritium was taken as the absorption amount. As a result, the absorption amount was 225 g. The results described in Tables 5 and 6 are obvious. It can be seen that the water-absorbing agent and the absorbent of the present invention have a high diffusion absorption rate and have a very liquid diffusivity. That is, it can be seen that the water-absorbing properties of the water-absorbing agent and the absorbent of the present invention are comparable to those of the water-absorbing agent and the absorbent of the comparison. The difference in characteristics becomes particularly large as the resin concentration in the absorbent body becomes higher. From the results described in Example 25 and Comparative Example 35, it is clear that the absorbent article of the present invention has superior properties (water absorption characteristics) such as a very high absorption capacity (water absorption capacity) than the comparative absorbent article. . In addition, the specific implementation aspects or embodiments disclosed in the item of the best implementation aspect of the invention are only for clearly explaining the technical content of the present invention, and should not be limited to these specific embodiments and explained narrowly. this invention. The spirit of the present invention and the scope of patent application described below can be modified and implemented in various ways. Industrial availability The above-mentioned absorbent or absorbent printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economy Thing. This makes it possible to provide an absorbent article having the above-mentioned excellent properties. 59-

Claims (1)

Central Standards Bureau of the Ministry of Economic Affairs, Zhenggong Consumer Cooperative Co., Ltd. Printing 4193 82 No. 84106029 Patent Application Chinese Patent Application. 筋 正 太 卬 Q 年 in 六 、 Application Patent Scope 1. A method for manufacturing a water-absorbing agent, comprising: A bridging agent makes the hydrophilic unsaturated monomer containing acrylic acid as the main component neutralized at 50 mol% or more in the presence of a dispersant at a temperature of 0t; and an aqueous solution polymerization at a temperature of 13 ° C or more The step of obtaining a water-absorbing agent precursor wherein the bridging agent is composed of an ester of an alcohol having 3 or more carbon atoms and unsaturated unsaturated acid with a carbon number of 6 or less, and all the hydroxyl groups of the alcohol having a trivalent or more are all When the molecular weight of the unsaturated carboxylic acid ester-forming compound is 1, the main component of the bridging agent in which the ratio of the molecular weight of the unsaturated carboxylic acid to the compound is in the range of 0.7 or more and 1.3 or less, and the molecule contains the alcohol skeleton 2 It is composed of the above high boiling point component, and the weight ratio of the main component of the bridging agent to the high boiling point component is within the range of 75/25 ~ 99/1, and the amount of the unsaturated unsaturated monomer relative to the hydrophilic monomer is 0_05 mole% Above and 0.5 Molar% or less; Adjust the water-absorbing agent precursor to a moisture content of 10% or less, the average particle size in the range of 200μm ~ 600μιη, and the proportion of particles with a particle size of 106jim or less A step of 0% by weight or less; and a step of heat-treating the water-absorbing agent precursor in the presence of a surface bridging agent at a temperature of 80 ° C or higher and 250ec or lower. 2- The method for manufacturing a water-absorbing agent according to item 1 of the applied patent garden, wherein the surface bridging agent is the first one that can react with a carboxyl group and has a solubility factor (SP value) of 12.5 (cal / cm3) 1/2 or more Surface bridging agent and second surface bridging agent with solubility factor (SP value) below 12_5 (cal / cm3) l / 2 *, and the treatment temperature without this treatment is above 160 ° C. 3—A kind of water-repellent agent manufacturing method, which uses W. acrylic acid and / or acrylic acid O: \ 40 \ 4OJ00.doc This paper size is applicable to China National Standard (CNS) A4 (210X297 mm) ) (Please read the notes on the back before filling in this page> Λ8 B8 C8 D8 Printed by the Order of the Ministry of Economic Affairs, Male Workers Consumer Cooperative, 4 \ 9382 6. Application for Patent Scope Polymerization of hydrophilic unsaturated monomers with salt as the main component to obtain a water-absorbing agent precursor, and the water-absorbing agent After the precursor is adjusted to a range of 200 μm to 600 μm, and the proportion of particles with a particle size of 10 6 | 1111 or less is 10% by weight or less, it can react with a carboxyl group and the solubility factor (3? Value) in the presence of the first surface bridging agent above 12.5 ((^ 1 / (= 1113) 1/2 and the second surface bridging agent whose solubility factor (SP value) is below 12.5 (cal / cm3) 1/2 Heat-treating the water-absorbing agent precursor, 4. A method for manufacturing a water-absorbing agent precursor, comprising using a bridging agent to make a hydrophilic unsaturated unsaturated monomer whose main component is at least 50 mole% neutralized propionic acid In the presence of a dispersant at a temperature above 0 and below 30 °, wherein the edge wood bridge is a trivalent or higher alcohol and unsaturated carboxylic acid having a carbon number of 6 or less All of the hydroxyl groups of the alcohol with trivalent or higher When the unsaturated carboxylic acid forms an ester-bonded compound having a molecular weight of 1, the main component of a bridging agent having a ratio of the molecular weight of the compound in the range of 0.7 to 1.3, and the molecule contains the alcohol skeleton 2 〇 It is composed of more than a high boiling point component, and the weight ratio of the main component of the bridging agent to the high boiling point component is in the range of 75/25 ~ 99/1, and the amount of the unsaturated monomer relative to the hydrophilic is 〇. 〇 5 moles. Within the range of 0 and 5 mole%. 5. According to the manufacturing method of the water absorbent precursor of item 4 of the patent application, wherein the weight ratio of the main component of the bridging agent to the high boiling point component is 8 〇 / 2〇 ~ 90/10. 6 'According to the method of manufacturing the water absorbent precursor of item 4 of the patent, -2-' ΐ Paper λα suitable for home care rate ~ ^ 717 inspection (21GX297 It's public (please read the note on the back ^ > before filling out this page) Scope of patent application AS BB C8 D8 Printed by the Central Government Bureau of the Ministry of Economic Affairs, Shellfish Consumer Cooperative, among which 65 mol% ~ 8G mol% of enoic acid is neutralized. Please refer to the patent No. 4 for the manufacturing method of the water-absorbing agent precursor, and the amount of the agent is relative to the hydrophilic range of 0.07 mol% or more and 0.2 mol% or less. The early shame is in 8. The method for manufacturing a water-absorbing agent precursor according to Patent Application No. 4 in which the amount of m dispersant is within the range of 1% to 100% by weight relative to the bridging agent. 9. The method for manufacturing a water-absorbing agent precursor according to item 4 of Shenyang Patent Fanyuan, wherein the aqueous solution polymerization step includes a step of mixing a bridging agent and a dispersant in advance, and then mixing with a hydrophilic unsaturated monomer. 10. A method for manufacturing a water-absorbent precursor precursor according to item 4 of the scope of patent application, wherein the aqueous solution is polymerized; the step includes pre-mixing a bridging agent, a dispersant, and acrylic acid, and then mixing the mixture with a hydrophilic unsaturated monomer Step α 11 ′ The manufacturing method of a water-absorbing agent precursor according to item 4 of the scope of the patent application, wherein the trivalent or higher alcohol having a carbon number of 6 or less is trimethylolpropane and the unsaturated carboxylic acid is propane Associated with acid. 12. —A water absorbing agent ', which is produced by the manufacturing method according to item 1 of the scope of patent application, and has a diffusion absorption rate of 60 minutes after the start of absorption. It is 25 g / g or more. 13. The water-absorbing agent according to item 2 of the scope of the patent application, wherein the diffusion absorption rate is 30 g / g or more after 60 minutes from the start of absorption. 1 4. The water-absorbing agent according to item i 2 of the patent application park, wherein the diffusion absorption rate is more than 32 g / g after 60 minutes from the start of absorption. . This paper size is in accordance with Chinese garden standards (CNS > A4 size (210X2 厘 mm) (please read the precautions on the back before filling out this page). II. 419382 A8 B8 C8 D8 VI. Economic scope of patent application Printed by the Central Workers' Union of the Ministry of Labor of the People's Republic of China 15 _ Water absorbent according to item 12 of the scope of application for patents, in which the diffusion absorption rate is more than 3 4g / g 60 minutes after the start of absorption. 1 6 · —A water absorbent , Which is produced by the manufacturing method according to the first patent application, and the diffusion absorption rate after 30 minutes from the start of absorption is 15 g / g or more. 1 7 _ According to the 16th scope of the patent application A water-absorbing agent in which the diffusion absorption rate is 25 g / g or more after 60 minutes from the start of absorption. 18_ —A water-absorbing agent manufactured by the manufacturing method according to the first scope of the patent application, and the absorption starts Those with a diffusion absorption rate of 15 g / g or more after 20 minutes. 19. The water-absorbing agent according to item 1S of the patent application scope, wherein the absorption absorption rate is more than 25 g / g after 60 minutes from the start of absorption. 2 0 According to the scope of patent application No. 1 The water-absorbing agent of 8 items, wherein the diffusion absorption magnification is 30 g / g or more after 60 minutes from the start of absorption. 2 1. According to the water-absorbing agent of item 12 of the patent application scope, the water-soluble salt content thereof is 0 or more and 7% by weight. The following. 22. The water-absorbing agent according to item 12 of the scope of the patent application, which contains a dispersant. 23. The water-absorbing agent according to item 22 of the scope of the patent application, wherein the proportion of the dispersant is relative to the precursor of the water-absorbing agent composed of a monomer. 100 unit weight is within the range of 0.005 unit weight or more and 0.5 unit weight or less. 24. An absorbent body comprising a water absorbing agent, the water absorbing agent is manufactured by the manufacturing method according to item 1 of the scope of patent application Obtained, and the diffusion absorption rate is 25 g / g or more after 60 minutes from the start of absorption. 25. The absorber according to item 24 of the scope of patent application, in addition, where the absorption S® furniture standard (CNS > A4 size (210X297 mm) (Please read the precautions on the back before filling out this page) Order. 4193 82 A8 B8 C8 D8 Ministry of Economic Affairs Central Government Standards Bureau Shoulder Workers Consumer Cooperatives Printed 6 Scope of patent application After 30 minutes from the start of the absorption of the liquid agent, the diffusion absorption rate is 15 g / g or more. 26. The absorbent body according to item 24 of the patent application garden, which contains hydrophilic fibers &27; according to item 26 of the patent application garden The absorbent body, wherein the ratio of the hydrophilic fiber is in the range of 0 to 60% by weight. 28- The absorbent body according to item 26 of the patent application park, wherein it is relative to the total amount of the water-absorbing agent and the hydrophilic fiber. The amount of the water absorbing agent is 50% by weight or more. The absorbent body according to item 24 of the patent application, further comprising an adhesive. 30. An absorbent article having an absorbent body, the absorbent body comprising a water-absorbing agent, the water-absorbing agent is made by the manufacturing method according to Item 1 of the Patent Application®, and 60 minutes after the start of absorption A diffusion absorption ratio of 25 g / g or more and a water-soluble component amount of 0 or more and 7% by weight or less. 31. The absorbent article according to item 30 of the scope of patent application, wherein the absorbent body further comprises hydrophilic fibers, and the ratio of the hydrophilic fibers in the absorbent body is within a range of 0 to 60% by weight. 32. The absorbent article according to item 31 of the scope of patent application, wherein the proportion of the hydrophilic fiber in the absorbent body is in the range of 20 to 40% by weight. 33. The absorbent article according to item 30 of the patent application scope, wherein the absorbent body further contains an adhesive adhesive. This paper size is in accordance with Chinese National Standard (CNS) A4 (210X297). (Please read the precautions on the back before filling this page) 34 9 4 9 2 8 3 ABCD VI. The scope of patent application is printed by the Ministry of Justice of the People's Republic of China and printed by the Consumers' Cooperative of the Procurement Bureau. 34. —A water-absorbing agent made by the manufacturing method according to item 3 of the scope of patent application. Those who have obtained the product and whose diffusion absorption ratio is 25 g / g or more 60 minutes after the start of absorption. 3 5 'The water-absorbing agent according to item 34 of the scope of the patent application, in which the diffusion absorption magnification is 30 g / g or more after 60 minutes from the start of absorption. 3 6' The water-absorbing agent according to item 34 of the patent application park, where Those with a diffusion absorption rate of 32 g / g or more after 60 minutes from the start of absorption · 37 A water absorbing agent according to item 34 of the patent application patent garden, wherein those with a diffusion absorption rate of 34 g / g or more after 60 minutes from the start of absorption ^ 38'A water-absorbing agent, which is produced by a manufacturing method according to item 3 of the scope of patent application, and has a diffusion absorption rate of 15 g / g or more after 30 minutes from the start of absorption. The water absorbing agent of item 38 has a diffusion absorption ratio of 25 g / g or more after 60 minutes from the start of osmium absorption. 40. —A water absorbing agent produced by the manufacturing method according to item 3 of the scope of patent application Those with a diffusion absorption rate of 15 g / g or more after 20 minutes from the start of absorption. 41. The water-absorbing agent according to item 40 of the patent application scope, wherein absorption starts. The diffusion absorption rate of 60 g or more after 25 minutes 4 2. According to the scope of patent application 4 '0 water absorbent, in which the diffusion absorption magnification is 30 g / g or more after 60 minutes from the start of absorption. 4 3. According to the water absorbent of item 3 in the scope of patent application, the amount of water-soluble components is 0 or more and 7% by weight or less. -6- Paper Wave Scale Chinese Standard (CNS) A4 Specification (210X297mm) (Please read the precautions on the back before filling this page) Order.% VI. Economic scope of patent application Ministry _ Printed by the Central Standards Bureau Shellfisher Consumer Cooperative—44. 'The water-absorbing agent according to item 34 of the patent application scope, which contains a dispersant. 4 5. The water-absorbing agent according to item 44 of the patent application scope, where The ratio of the dispersant to the water-absorbing agent precursor composed of monomers is within a range of 0.005 unit weight or more and 0.5 unit weight or less. 4 6 · —Absorbent body 'comprising a water-absorbing agent, the water-absorbing agent The agent is prepared according to the manufacturing method according to item 3 of the scope of patent application, and the diffusion absorption rate is 25 g / g or more after 60 minutes from the start of absorption. 47. The absorber according to item 46 of the patent application park, In addition, the absorption of the water-absorbing agent The diffusion absorption magnification after 30 minutes from the start is 15 g / g or more. 48. The absorbent body according to item 46 of the patent application patent, which contains hydrophilic fibers. 49. The absorbent body according to item 48 of the patent application patent. Wherein the ratio of the hydrophilic fiber is in the range of 0 to 60% by weight. 5 〇. The absorbent body according to item 48 of the patent application scope, wherein the water absorption is relative to the total amount of the water-absorbing agent and the hydrophilic fiber. The amount of the agent is more than 50% by weight. 51. The absorbent according to item 46 of the patent application patent garden, which additionally contains an adhesive. 52. An absorbent article having an absorbent body, the absorbent body comprising a water absorbing agent, the water absorbing agent is made by a manufacturing method according to item 3 of the scope of patent application, and it diffuses after 60 minutes from the start of absorption The absorption rate is 25 g / g or more, and the amount of water-soluble components is 0 or more and 7 wt.% Or less. Standards for this paper are for the National Standards for Distressed Countries (CNS). 8 4 grids (210X297 mm) (please read the notes on the back to save the ball and write the book) • 1T Printed by the Male Workers Consumer Cooperative of the Central Bureau of the Ministry of Economic Affairs A 03 82-C8 D8 6. Application scope 5 3. The absorbent article according to item 52 of the patent application park, wherein the absorbent body further comprises hydrophilic fibers, and the ratio of the hydrophilic fibers in the absorbent body is 0. Above and below 60% by weight. 54. The absorbent article according to item 53 of the patent application, wherein the ratio of the hydrophilic fiber in the absorbent body is 20 or more and 40 weight. /. Within the range below. 55. The absorbent article according to item 52 of the scope of patent application, wherein the absorbent body further contains an adhesive adhesive. This paper size is based on China's national kneading rate < CNS) A4 size (210X297 mm) (please read the note on the back before filling this page)